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287 FLUKE | Alldatasheet

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True-rms Digital Multimeters Users Manual June 2007, Rev. 1, 7/08 © 2007, 2008 Fluke Corporation. All rights reserved. Specifications subject to change without notice. All product names are trademarks of their respective companies.

Each Fluke 20, 70, 80, 170, 180 and 280 Series DMM will be free from defects in material and workmanship for its lifetime. As used herein, “lifetime” is defined as seven years after Fluke discontinues manufacturing the product, but the warranty period shall be at least ten years from the date of purchase. This warranty does not cover fuses, disposable batteries, damage from neglect, misuse, contamination, alteration, acci- dent or abnormal conditions of operation or handling, including failures caused by use outside of the product’s specifications, or normal wear and tear of mechanical components. This warranty covers the original purchaser only and is not transferable. For ten years from the date of purchase, this warranty also covers the LCD. Thereafter, for the lifetime of the DMM, Fluke will replace the LCD for a fee based on then current component acquisition costs. To establish original ownership and prove date of purchase, please complete and return the registration card accompanying the product, or register your product on http://www.fluke.com. Fluke will, at its option, repair at no charge, replace or refund the purchase price of a defective product purchased through a Fluke authorized sales outlet and at the applicable international price. Fluke reserves the right to charge for importation costs of repair/replacement parts if the product purchased in one country is sent for repair elsewhere. If the product is defective, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that service center, with a description of the difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Fluke will pay return transportation for product repaired or replaced in-warranty. Before making any non-warranty repair, Fluke will estimate cost and obtain authorization, then invoice you for repair and return transportation. THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAM- AGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY. AUTHORIZED RESELLERS ARE NOT AUTHORIZED TO EXTEND ANY DIFFERENT WARRANTY ON FLUKE’S BEHALF. Since some states do not allow the exclusion or limita- tion of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to you. If any provision of this warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision. Fluke Corporation P.O. Box 9090 Everett, WA 98206-9090 U.S.A. Fluke Europe B.V. P.O. Box 1186

5602 BD Eindhoven

i Table of Contents Title Page

v List of Tables Table Title Page

Read “Safety Information” before using this Meter. The descriptions and instructions in this manual apply to the model 289 and model 287 True-rms Digital Multimeters (hereafter referred to as the Meter). The model 289 appears in all illustrations. Contacting Fluke To contact Fluke, call: USA: 1-888-993-5853 Canada : 1-800-363-5853 Europe : +31 402-675-200 Japan: +81-3-3434-0181 Singapore : +65-738-5655 Anywhere in the world: +1-425-446-5500 Visit Fluke's web site at: www.fluke.com Register your Meter at: http://register.fluke.com Safety Information The Meter complies with:

• ANSI/ISA 82.02.01 (61010-1) 2004
• UL 61010B (2003)
• CAN/CSA-C22.2 No. 61010-1-04
• IEC/EN 61010-1 2 nd Edition Pollution Degree 2
• EMC EN 61326-1
• Measurement Category III, 1000V, Pollution Degree 2
• Measurement Category IV, 600 V, Pollution Degree 2 In this manual, a Warning identifies hazardous conditions and actions that could cause bodily harm or death. A Caution identifies conditions and actions that could damage the Meter, the equipment under test, or cause permanent loss of data. XWWarning To avoid possible electric shock or personal injury, follow these guidelines:
• Use this Meter only as specified in this manual or the protection provided by the Meter might be impaired.
• Do not use the Meter if it is damaged. Before you use the Meter, inspect the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors.

• Make sure the battery door is closed and latched before operating the Meter.
• Remove test leads from the Meter before opening the battery door.
• Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity. Replace damaged test leads before you use the Meter.
• Do not apply more than the rated voltage, as marked on the Meter, between the terminals or between any terminal and earth ground.
• Never operate the Meter with the cover removed or the case open.
• Use caution when working with voltages above 30 V ac rms, 42 V ac peak, or 60 V dc. These voltages pose a shock hazard.
• Use only the replacement fuses specified by the manual.
• Use the proper terminals, function, and range for measurements.
• Avoid working alone.
• When measuring current, turn off circuit power before connecting the Meter in the circuit. Remember to place the Meter in series with the circuit.
• When making electrical connections, connect the common test lead before connecting the live test lead; when disconnecting, disconnect the live test lead before disconnecting the common test lead.
• Do not use the Meter if it operates abnormally. Protection may be impaired. When in doubt, have the Meter serviced.
• Do not operate the Meter around explosive gas, vapor, or dust.
• Use only 1.5 V AA batteries, properly installed in the Meter case, to power the Meter.
• When servicing the Meter, use only specified replacement parts.
• When using probes, keep fingers behind the finger guards on the probes.
• Do not use the Low Pass Filter option to verify the presence of hazardous voltages. Voltages greater than what is indicated may be present. First, make a voltage measurement without the filter to detect the possible presence of hazardous voltage. Then select the filter function.
• Only use test leads that have the same voltage, category, and amperage ratings as the meter and that have been approved by a safety agency.

True-rms Digital Multimeters Hazardous Voltage

• Use proper protective equipment, as required by local or national authorities when working in hazardous areas.
• Comply with local and national safety requirements when working in hazardous locations. WCaution To avoid possible damage to the Meter or to the equipment under test, follow these guidelines:
• Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance.
• Use the proper terminals, function, and range for all measurements.
• Do not remove batteries while the Meter is turned on or a signal is applied to the Meter’s input jacks.
• Before measuring current, check the Meter's fuses. (See "Testing the Fuses" in the Users Manual on the accompanying CD.)
• Do not use the LoZ mode to measure voltages in circuits that could be damaged by this mode’s low impedance (≈3 kΩ). (Model 289 only) Hazardous Voltage To alert you to the presence of a potentially hazardous voltage, when the Meter detects a voltage ≥30 V or a voltage overload (OL), the Ysymbol is displayed.

Table 1 lists and describes the symbols used on the Meter and in this manual. Table 1. Symbols lighting systems in large buildings. or underground utility service.

True-rms Digital Multimeters

Features

Tables 2 through 5 briefly describe the Meter’s features. Understanding the Push Buttons The 14 push buttons on the front of the Meter activate features that augment the function selected using the rotary switch, navigate menus or control power to Meter circuits. The buttons shown in Figure 1 are described in Table 2. est02.emf Figure 1. Push Buttons Table 2. Push Buttons O Turns the Meter on or off. to the rotary switch function. information, and perform data entry. saved. Also accesses AutoHold. M Starts and stops MIN MAX recording. moment the info button is pressed.

For some menu selections, holding down a softkey or cursor button will continuously change (or advance) a selection until the button is released. Normally, each press of a button causes the selection to change once. During some selections, the selections will change faster if the button is held for two or more seconds. This is helpful when scrolling through a list of selections, such as a list of stored measurements.

True-rms Digital Multimeters Display features shown in Figure 2 are described in Table 3 and the following sections. 10987 11 12 AutoHOLD mVAC Crest Factor Hz60.000 Save Setup Auto Range 5 mVDC

500 VAC0

8:10pm 06/13/07123.45 VAC 100 200 300 400 AutoSAVEHOLDREL 123.45 est01.eps Figure 2. Display Features Table 3. Display Features just below the displayed label. relative to a reference value. D Minus sign Indicates a negative reading.

Table 3. Display Features (cont.) M Units Indicates the units of measure. information about the input signal. relative percent mode, the bar graph goes to ±10 %. input of 25 Vac turns on segments up to the middle of the scale. the right end for positive off-scale values. display, present date, and beeper on/off icon.

True-rms Digital Multimeters The mini-measurement display shows the measurement value of the primary function, if it is not already shown in the page area of the display. For example, when the display is frozen for a HOLD, the mini-measurement display continues to show the input signal (Live) measurement and a mini z. In addition, the mini- measurement display will flash, if z (for inputs above 30 volts) would normally appear in the primary display but is obscured. To warn of the possibility of blowing a current fuse, the mini- measurement display also flashes when current measurements exceed the maximum continuous current levels (see specifications). Page Area The page area of the display is where the main meter content is displayed. The primary display (upper half of the page area) is where the most important value of the selected function is shown. The secondary display contains the bar graph and values that may be measured in addition to the primary function value. For example, with frequency measurement selected in Vac, the frequency value will appear in the primary display with the ac voltage value in the secondary display. Softkey Labels Labels for the four function softkeys (F1 through F4) appear in the bottom row of the display. These labels will change based on the function and/or menu selection. Adjusting Display Contrast When not selecting items on a menu or inputting data, pressing 7 increases display contrast and pressing 8 decreases it.

Figure 3. Rotary Switch Table 4. Rotary Switch Positions

True-rms Digital Multimeters All functions except current use the W and COM input terminals. The two current input terminals (A and mA/μA) are used as follows: Current from 0 to 400 mA, use the € and COM terminals. Current between 0 and 10 A use the A and COM terminals. est04.emf Figure 4. Input Terminals Table 5. Input Terminals frequency, and duty-cycle measurements. measurements, frequency, and duty cycle. COM Return terminal for all measurements.

techniques for controlling Meter power. while the Meter is on causes it to turn off. the softkey labeled Save will save the data. describes the various battery levels the indicator represents. Table 6. Battery Level Indicator appears 15 seconds before the Meter shuts down. battery level will not support a selected function. will turn the Meter back on after it is powered off automatically.

True-rms Digital Multimeters Selecting the Range recording mode, the time period is five minutes. For MIN MAX, Peak and AutoHold modes, the time period is the same time the Auto Off feature is set for. See the “Setting Backlight and Auto Off Timeouts” section later in this manual. Battery saver mode conserves battery power by shutting down circuits not necessary for the selected function, including the display. However, the LED surrounding the power button (O) will continue to flash to indicate the Meter is still collecting data. The Meter “wakes up” from battery-save mode under the following conditions:

• A button is pressed
• The rotary knob is moved
• A lead is removed or inserted into a current input jack.
• The Meter changes range
• IR Communications begin These condictions only awaken the Meter and does not change the Meter’s function or mode of operation. Controlling the Backlight If viewing the display becomes difficult in low-light conditions, press G to activate the LCD backlight. The backlight button cycles the backlight through three states: low, high, and off. The Meter displays a message if the battery level will not support the backlight operation. To conserve battery life, a user-adjustable timeout controls how long the backlight stays on. The default timeout is 5 minutes. To change the timeout, refer to “Setting Backlight and Auto Off Timeouts” later in this manual. Selecting the Range The Meter’s selected range is always displayed above the right- hand end of the bar graph, as the range indicator. Pressing R switches the Meter between manual and autoranging. It also cycles through the Meter ranges when manual ranging is enabled. Note You cannot use R in conductance, diode test, LoZ, Low Ohms, and temperature functions. These functions all use a fixed range. In autorange, the Meter selects the lowest range to display the highest available precision (resolution) for the input signal. If Manual range is already enabled, press and hold R for one second to enter the autoranging mode. If autorange is enabled, press R to enter manual ranging. Each additional press of R sets the Meter to the next higher range, unless it is already in the highest range, at which point the range switches to the lowest range. Understanding Function Menus Each primary measurement function (rotary switch position) has a number of optional sub-functions or modes accessed by pressing the softkey labeled Menu (F1). A typical menu is shown in Figure 5.

Figure 5. Function Menu state it was in before pressing the Menu softkey. would disable the relative function. to turn off relative and display relative percent. Menu selections are remembered for each rotary switch position. for the millivolts ac function. area of the display, indicating more menu items are available.

True-rms Digital Multimeters Input Alert™ Feature press 5 to scroll the screen horizontally and reveal the off-screen menu items. Conversely, with the menu selector on an item in the right-hand column, press 6 to reveal the off-screen menu items. Input Alert™ Feature XW Warning To avoid circuit damage and possibly blowing the Meter’s current fuse, do not place the probes across (in parallel with) a powered circuit when a lead is plugged into a current terminal. This causes a short circuit because the resistance through the Meter's current terminals is very low. If a test lead is plugged into the mA/μA or A terminal, but the rotary switch is not set to the correct current position, the beeper warns you by making a chirping sound and displays “Leads connected incorrectly”. This warning is intended to stop you from attempting to measure voltage, continuity, resistance, capacitance, or diode values when the leads are plugged into a current terminal. Using the Info Button While operating the Meter, more information about a selected function, a front-panel button, or a menu item may be necessary. Press I to open an information window that lists topics covering the functions and modifiers that are available at the time the button is pressed. Each topic provides a brief explanation on a Meter function or feature. The information revealed through I is not meant to replace the more detailed information found in this manual. Function and feature explanations are brief and only meant to refresh a person’s memory. The number of information topics displayed at any one time may exceed the display area. Use the softkeys labeled Next and Prev to move from topic to topic. Use the softkey labeled More or 7 and 8 to scroll through the information a full screen at a time. Pressing the softkey labeled Close, or I will close the information window. Hold and AutoHold Mode To freeze the display for any function, press H. Only the mini- measurement display and hazardous voltage icon (z) continue to indicate the actual input. The battery level indicator is also active. The Meter’s softkeys are relabeled for saving the frozen reading or activating the AutoHold mode. If H is pressed while MIN MAX record, peak record, or a recording session is in progress, the display freezes but the data acquisition continues in the background. Pressing H again updates the display to reflect data that was acquired during the hold. Pressing the softkey labeled AutoHOLD activates AutoHold if the Meter is not in the Peak, MIN MAX, or Record modes. AutoHold operation monitors the input signal and updates the display and, if enabled, sounds the beeper, whenever a new stable measurement is detected. A stable measurement is one that does not vary more than a selected adjustable percentage (AutoHold threshold) for at least one second. The Meter filters

out open lead conditions so the Meter leads can be moved between test points without triggering a display update. Note For temperature measurements, the AutoHold threshold is a percent of 100 degrees. The default AutoHold threshold is 4% of 100 degrees, or 4 degrees Celsius or Fahrenheit. Pressing H while in AutoHold mode, forces the Meter’s display to update with the present measurement, just as if a stable measurement had been detected. To set the AutoHOLD Threshold Value, press the softkey labeled Setup to access the setup menu. Using the cursor buttons, move the menu selector next to the menu item labeled Recording and press the softkey labeled Recording to open the recording setup screen. Using the cursor buttons, move the menu selector next to the menu item labeled Event Threshold for AutoHOLD and then press the softkey labeled Edit. Press 7 or 8 to scroll through the AutoHold threshold values. With the desired value selected, press the softkey labeled Close. Measuring Crest Factor Crest factor is a measure of signal distortion and is calculated as a signal’s peak value over its rms value. This is an important measurement when looking at power quality issues. The Meter’s crest factor function is only available for the ac measurements: Vac, mVac, Aac, mAac, and μAac. With the Meter in one of the ac measurement functions, press the softkey labeled Menu. Next, move the menu selector next to the menu item labeled Peak,CF and press the softkey labeled CF. The crest factor value is displayed in the primary display while the ac measurement appears in the secondary display. Frequency, duty cycle, and pulse width are not allowed during crest factor measurements. Capturing Minimum and Maximum Values The MIN MAX Record mode captures minimum, average, and maximum input values. When the input goes below the recorded minimum value or above the recorded maximum value, the Meter beeps and records the new value. The Meter stores the elapsed time since the recording session was started at the same time. The MIN MAX mode also calculates an average of all readings taken since the MIN MAX mode was activated. This mode is for capturing intermittent readings, recording minimum and maximum readings unattended, or recording readings while equipment operation precludes watching the Meter. The MIN MAX mode is best for recording power supply surges, inrush currents, and finding intermittent failures. Response time is the length of time an input must stay at a new value to be captured as a possible new minimum or maximum value. The Meter has a 100 millisecond MIN MAX response time. For example, a surge lasting 100 milliseconds would be captured but one lasting only 50 milliseconds may not be captured at its actual peak value. See the MIN MAX specification for more information. The true average value displayed is the arithmetic mean of all readings taken since the start of recording (overloads are discarded). The average reading is useful for smoothing out unstable inputs, calculating power consumption, or estimating the percentage of time a circuit is active.

on the Smoothing mode to display a steadier reading. section later in this manual. with their respective elapsed times.

500 VACVAC

Figure 6. MIN MAX Record Display MIN MAX record session without saving the collected data.

Close to exit the MIN MAX mode. immediately starts a new MIN MAX recording session. more accurately measured using the peak record feature. To activate the peak mode, press the softkey labeled Menu.

119.8 VAC

500 VACV

Figure 7. Peak Record Display the recorded value’s time stamp.

True-rms Digital Multimeters Capturing Peak Values Pressing the softkey labeled Stop ends the peak recording session. The summary information in the display freezes and the softkeys change function to allow saving the collected data. Pressing the softkey labeled Close exits the peak recording session without saving the collected data. Note Turning the rotary switch before saving the peak recording data will cause all the accumulated data to be lost. To save peak screen data, the peak capture session must be ended by pressing the softkey labeled Stop. Next press the softkey labeled Save. A dialog box opens where the default saved name can be selected or another name assigned. Press the softkey labeled Save to store the Peak screen data. Peak capture can not be continued at this point. Press the softkey labeled Close to exit the Peak capture mode. Pressing the softkey labeled Restart while the peak recording session is running stops the session, discards all peak recorded data, and immediately starts a new peak record session. When viewing saved records, snapshot peak records look the same as a stopped peak records. Therefore, use the elapsed time (average value time stamp) to identify one record from another. To extend battery life during peak record, the Meter enters a battery-saver mode after a period of time set for the Auto Off feature. See the “Setting Backlight and Auto Off Timeouts” section for more information on the battery saver mode.

verify the presence of hazardous voltages. hazardous voltage. Then select the filter function. In Low Pass Mode, the Meter goes to manual mode. available when the Low Pass Filter is enabled. Figure 8. Low Pass Filter

frequency, duty cycle, pulse width, crest factor, and dB. Figure 9. Relative Mode Functions the functions shown in Figure 9, press the softkey labeled Menu. the reference value is 0, the Meter displays OL. is possible when making relative dB measurements. displayed units change to dB. measurements over a wide range of input voltage.

to measure ac volts as shown in Figure 10. section in this manual to learn more about each menu item. Figure 10. AC Voltage Measurements

Meter’s range is set to 1000 volts in the manual ranging mode. dBm Reference” section later in this manual.

1000 Reference

500 VAC0 100 200 300 400

Figure 11. dBm Display dBm value, as shown in Figure 11.

To select another reference value, press the softkey labeled Ref to display a message box with the current reference value. Pressing 7 or 8, scrolls through the nine predefined references: 4, 8, 16, 25, 32, 50, 75, 600, and 1000. Set the reference by pressing the softkey labeled OK. To add a custom reference impedance, see the “Setting a Custom dBm Reference” section later in this manual. A dBV measurement uses a 1 volt reference voltage to compare the present measurement against. The difference between the two ac signals is displayed as a dBV value. The reference impedance setting is not part of a dBV measurement. To make a dBV measurement, position the rotary switch to V or T and place the Meter leads on the voltage to be measured. Next, press the softkey labeled Menu. Move the menu selector to the menu item labeled dBV and press the softkey labeled dBV. The Meter displays the voltage in dBV. To exit the dBV or dBm function, press the softkey labeled Menu followed by the softkey labeled dBV or dBm, respectively. Selecting one of the other modifiers such as ms, %, or CF also cancels dBV or dBm.

of center while negative dc voltages fill left of center. to the U or N position as shown in Figure 12. section in this manual to learn more about each menu item.

50 VDC3020100-10-20-30-40-50 40

Figure 12. DC Voltage Measurements

softkey that presents these two signals as needed. relative % are not allowed in AC,DC or DC,AC modes. any of the three AC+DC modes.

500 VAC

Figure 13. AC and DC Display modes. The same range is used for both ac and dc signals.

True-rms Digital Multimeters Making Measurements only when both the ac and dc signals drop below 10% of the present range. For AC+DC, ranging is controlled by the underlying values of the ac and dc signals and not by the sum of the AC+DC calculation. To exit the AC+DC mode, press the softkey labeled Menu and select the default mode for the selected function. For dc volts and dc millivolts functions, move the menu selector to VDC and press the softkey labeled VDC. For the current functions, move the menu selector to the AC,DC menu item and press either the AC or DC softkey.

True-rms Digital Multimeters Making Measurements To input a temperature offset value, press the softkey labeled Offset to open a message box with the present offset value. Use 6 and 5 to position the cursor over one of the digits or the polarity sign. Use 7 and 8 to scroll through the numbers for each digit in the offset or switch between a + or – offset. With the desired value displayed, press the softkey labeled OK to set the temperature offset. When set to something other than 0.0, the offset value is shown in the secondary display. Measuring Resistance W Caution To avoid possible damage to the meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring resistance. The Meter measures resistance (opposition to current flow) in ohms (Ω). This is accomplished by sending a small current out through the test leads to the circuit under test. To measure resistance, set the Meter’s rotary switch to S and set up the Meter as shown in Figure 15. Keep the following in mind when measuring resistance. Because the meter’s test current flows through all possible paths between the probe tips, the measured value of a resistor in a circuit is often different from the resistor’s rated value. The test leads can add 0.1 Ω to 0.2 Ω of error to resistance measurements. To test the leads, touch the probe tips together and read the resistance of the leads. To remove lead resistance from the measurement, hold the test lead tips together and press the softkey labeled Menu. Next, move the menu selector to the menu item labeled REL and press the softkey labeled REL. Now all future displayed readings indicate the resistance at the probe tips. The Meter’s resistance function includes modes to help with resistance measurements. Pressing the softkey labeled Menu opens a menu of items that can be used to modify the basic resistance measurement. Refer to the appropriate section in this manual to learn more about each menu item.

Figure 15. Resistance Measurement

circuit voltage up to 20 volts. therefore disabled when the Meter is in the Y function. Continuity is the presence of a complete path for current flow. open/short indicator, and a beeper. The resistance reading is simply an ohms function measurement. shows the short and open continuity indication. Figure 16. Continuity Indicator continuity function is selected.

For in-circuit tests, turn circuit power off. Figure 17. Continuity Testing

True-rms Digital Multimeters Making Measurements To change whether the beeper sounds on shorts or opens, press the softkey labeled Menu. Move the menu selector to the menu item labeled Beeper and press the softkey labeled Short/O… . This beeper selection, Beep on Short or Beep on Open, is displayed just above the continuity indicator. The continuity beeper is always enabled when continuity mode if first entered. To enable or disable the beeper for continuity, press the softkey labeled Menu. Move the menu selector to the menu item labeled Beeper and press the softkey labeled Beeper. The status of the continuity beeper is displayed to the right of the resistance reading with j when enabled and i when disabled. This setting is indepe ndent of the Meter’s beeper enable/disable setting in the setup menu. Toggle between the continuity and ohms functions by pressing softkey F3, which is always labeled with the alternate function.

value with the test leads open. Figure 18. Conductance Measurement

are in the nanofarad (nF) to microfarad (μF) range. resulting voltage, and then calculating the capacitance. Figure 19. Capacitance Measurement

To measure capacitance, position the rotary switch to P and set up the Meter as shown in Figure 19. If the display doesn’t already indicate the Meter is measuring capacitance, press the softkey labeled Menu. Next, move the menu selector to the menu item labeled Diode,Cap and press the softkey labeled Cap. Note To improve measurement accuracy of small value capacitors, press Menu and move the menu selector to the menu item labeled REL. With the test leads open, press the softkey labeled REL to subtract the residual capacitance of the Meter and leads. Testing Diodes W Caution To avoid possible damage to the meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before testing diodes. Use the diode test to check diodes, transistors, silicon controlled rectifiers (SCRs), and other semiconductor devices. The test sends a current through a semiconductor junction, and then measures the junction’s voltage drop. A typical junction drops 0.5 V to 0.8 V. To test a diode out of a circuit, position the rotary switch to P and set up the meter as shown in Figure 20. If the display doesn’t already indicate the Meter is in the Diode Test function, press the softkey labeled Menu. Next, move the menu selector to the menu item labeled Diode,Cap and press the softkey labeled Diode. If the beeper is enabled during diode test, it will beep briefly for a normal junction and sound continuously for a shorted junction, below 0.1 V. See the “Disabling and Enabling the Beeper” section to disable the beeper. In a circuit, a similar diode should still indicate a forward-bias reading of 0.5 V to 0.8 V; however, the reading can vary depending on the resistance of other pathways between the probe tips. Note R and MIN MAX are disabled when the Meter is setup for diode test.

5 VDC01 234

Figure 20. Diode Testing

To avoid damage to the Meter and possible injury, never attempt an in-circuit current measurement where the open-circuit potential to earth is greater than 1000 V. W Caution To avoid possible damage to the Meter or to the equipment under test, check the meter’s fuses before measuring current. See the Maintenance section later in this manual. Use the proper terminals, function, and range for your measurement. Never place the probes across (in parallel with) any circuit or component when the leads are plugged into the current terminals. Current is the flow of electrons through a conductor. To measure current, you must open the circuit under test, then place the meter in series with the circuit. Note When measuring current, the display will flash when the input current exceeds 10 amps for the A terminal and 400 mA for the mA/ μA terminal. This is a warning that current is approaching the fuse’s current limit. To measure ac or dc current, proceed as follows: 1. Turn off power to the circuit. Discharge all high- voltage capacitors. 2. Insert the black lead into the COM terminal. Insert the red lead in an input appropriate for the measurement range. Note To avoid blowing the Meter’s 440 mA fuse, use the mA/μA terminal only if you are sure the current is less than 400 mA. 3. If you are using the A terminal, set the rotary switch to A. If you are using the mA/μA terminal, set the rotary switch to X for currents below 5000 μA (5 mA), or A for currents above 5000 μA. See Figure 21 for test lead connections and function selection. Refer to the “Input Alert Feature” section for information on the alerts the Meter uses when leads are not used correctly for current measurements. 4. As shown in Figure 22, open the circuit path to be tested. Touch the red probe to the more positive side of the break; touch the black probe to the more negative side of the break. Reversing the leads will produce a negative reading, but will not damage the meter. 5. Turn on power to the circuit; then read the display. Be sure to note the measurement unit given at the right side of the display (μA, mA, or A). 6. Turn off power to the circuit and discharge all high-voltage capacitors. Remove the Meter and restore the circuit to normal operation.

True-rms Digital Multimeters Making Measurements Note While in a current measurement function, the Meter will stay in the selected AC or DC current measurement mode when switching between n and €. Whenever switched to one of the current measurement functions, the Meter will default to the last current type selected (AC or DC).

2.5527 AAC

5 AAC01 234

Figure 21. Current Measurement Setup

Figure 22. Current Measurement Circuit Connection

Figure 24. Frequency Display toggles the trigger setting between the two selections. increases the sensitivity of the meter. general, the lowest frequency displayed is the correct one.

Figure 25. Duty Cycle Measurements

functions allowing frequency measurements shown in Figure 23.

123.45 VAC

Figure 26. Duty Cycle Display volts or amps value of the signal and not the duty cycle value. The pulse polarity is displayed to the right of the duty cycle value. J indicates a positive pulse and K indicates a negative pulse. measure better than the AUTO-selected input range. must be periodic; its pattern must repeat at equal time intervals. functions allowing frequency measurements shown in Figure 23.

Figure 27. Pulse Width Measurements

True-rms Digital Multimeters Changing Meter Setup Options The primary display indicates the input signals pulse width in milliseconds. The frequency of the signal is displayed in the secondary display. The mini-measurement display indicates the volts or amps value of the input signal. The bar graph tracks the volts or amps value of the signal and not the pulse width value. The pulse width polarity is displayed to the right of the duty cycle value. J indicates a positive pulse width and K indicates a negative pulse. To change the polarity, press the softkey labeled J K. The polarity indicator changes to the opposite polarity. Changing Meter Setup Options The Meter has a number of preset features such as date and time formats, backlight and battery save mode timeouts, and the displayed language. These variables are referred to as Meter setup options. Many setup options affect general Meter operations and are active in all functions. Others are limited to one function or group of functions. Access to the setup options is always available through the softkey labeled Setup. Information about the Meter, such as serial number, model, for example. is also accessed through the setup menu. Resetting Meter Setup Options The Meter’s setup options can be reset to default values through the setup menu. Open the setup menu by pressing the softkey labeled Setup. Position the menu selector next to the menu item labeled Reset and press the softkey labeled Setup. A message will appear asking to confirm the reset action. Press the softkey labeled OK to perform the reset. Note A setup reset also resets the temperature offset and dBm reference to their default value. In addition to resetting the setup variables, pressing the softkey labeled Meter will also clear all saved measurement screens, MIN MAX screens, peak screens, and recording records. The Meter’s clock is reset to a default value as well. Setting Display Contrast Meter display contrast can be adjusted through the Meter’s setup menu. Open the setup menu by pressing the softkey labeled Setup and position the menu selector next to the menu item labeled Contrast. Pressing the softkey labeled + (F1) increases display contrast, while the softkey labeled – (F2) decreases contrast. Contrast can also be set through the 7 and 8 buttons when not being used to move between menu selections. Setting the Meter’s Language The Meter comes from the factory with the display language set to English. To select another language, open the setup menu by pressing the softkey labeled Setup. Move the menu selector next to the menu item labeled Display. Next, press the softkey labeled Format (F2) to open the format menu. If not already selected, move the menu selector to the left of the menu item labeled Language and press the softkey labeled Edit. The currently selected language becomes highlighted and f appears to the right of the language. Use 7 and 8 to scroll through the available languages, then press the softkey labeled OK to set the Meter’s display language. Press the softkey labeled Close to return to normal Meter operation.

The Meter’s internal clock is used in the display and for time- stamping recorded measurements. To change the date and time as well as the display format, press the softkey labeled Setup. Position the menu selector next to the menu item labeled Display. To set the date and time, press the softkey labeled Date/Time to open the date/time menu. Next, position the menu selector next to either the Set Date item or Set Time item and press the softkey labeled Edit. Using 5 and 6, position the cursor on the date or time element to adjust. Use 7 and 8 to change the selected date or time element value. Press OK to complete the action. Setting Backlight and Auto Off Timeouts The Meter’s backlight and auto off features use timers to determine when to turn off the backlight, when to automatically turn the Meter off or enable the battery saver mode. To set these timeouts, press the softkey labeled Setup and position the menu selector next to the menu item labeled Instrument. Position the menu selector next to the menu item labeled Auto Backlight Timeout or Auto Power Off and then press the softkey labeled Edit. Use 7 and 8 to adjust the time to one of the preset values. Press OFF to disable the timeout feature. Press the softkey labeled OK to set the selected time. Press the softkey labeled Close to return to normal Meter operation. The battery-saver mode is used when the Meter is performing a recording session or during MIN MAX, Peak record and AutoHold. The battery-saver mode powers down circuits that are not involved in the operation of these recording sessions, including the display. For the record mode, the timeout period is set to five minutes and is enabled only when the Auto Power Off timeout is set to a value other than Off. For MIN MAX, Peak, and AutoHold, the timeout is the time period set for Auto Off. Setting a Custom dBm Reference To add a custom dBm reference value, press the softkey labeled Setup and position the menu selector next to the menu item labeled Instrument. Next press the softkey labeled Instrument and position the menu selector next to the menu item labeled dBm Reference. Next, press the softkey labeled Edit. Use 5 and 6 to position the cursor on a specific digit. Press 7 and 8 to increment or decrement the digit. With the desired reference displayed, press the softkey labeled OK to add this value to the dBm reference list. Only one custom value is allowed. Press the softkey labeled Close to return to normal Meter operation. Disabling and Enabling the Beeper The Meter’s beeper alerts users to the presence of messages, operator errors such as incorrect lead connections for the selected function, and newly sensed values for MIN MAX and Peak recording. Although the beeper is also used for the continuity function, controlling the beeper for that function is not done through this setup option. See the “Testing for Continuity” section for information on the continuity beeper. To enable or disable the Meter’s beeper, press the softkey labeled Setup and position the menu selector next to the menu item labeled Instrument. Next press the softkey labeled Instrument and position the menu selector next to the menu item labeled Beeper. Press the softkey labeled Edit to move the cursor to the on or off selection. Use 7 and 8 to switch the beeper on or off. The status of the beeper is indicated in the display’s status bar (see item 12 in Figure 2).

True-rms Digital Multimeters Using Memory Enabling and Disabling the Smoothing Mode When an AC input signal is noisy or changes rapidly, the smoothing mode may display a steadier reading. To enable or disable the smoothing mode, press the softkey labeled Setup and position the menu selector next to the menu labeled Instrument. Next press the softkey labeled Instrument and position the menu selector next to the menu item labeled Smoothing. Press the softkey labeled Edit to move the cursor to the on or off selection. Use 7 and 8 to switch the smoothing mode on or off. Using Other Setup Options Additional setup options hold information about the Meter as well as some general Meter functions. The Meter Info selection lists the serial number, model number, firmware version, calibration date, and calibration counter. Operator name, company name, site name, and contact information are also displayed when this information has been loaded into the Meter from FlukeView® Forms software. The Calibration selection allows a qualified calibration technician to enter a password that allows the Meter to be calibrated. See the 287/289 Calibration Information document to calibrate the Meter. The Secure Erase option allows user-accessible memory to be erased as required by Homeland Security regulations. Meter calibration is not lost when this low-level erase is performed. As new Meter features are created, the latest version of software can be downloaded to the Meter from Fluke’s support web page using the Software Update option. Using Memory The Meter has memory for storing individual measurements, measurements collected over a specified duration, and measurement events. All stored data can be viewed on the Meter or downloaded to a PC through the Meter’s infrared (IR) communication link using FlukeView™ Forms. See the “Using Communications” section for more information on communicating with a PC through FlukeView Forms software. Storing Individual Measurement Data For all measurement functions, a snapshot of the screen data is saved by pressing the softkey labeled Save. Except for the mini- measurement in the status bar, the display freezes and the Save menu appears. Two choices allow either saving the data under a previously selected name or choosing another name by pressing the softkey labeled +Name. See the “Naming Saved Data” section later in this manual. The displayed data is stored along with the date and time of day the save was performed. For MIN MAX and Peak, the displayed summary data can be stored at any time by pressing the softkey labeled Save, thus preserving a snapshot of the session at that moment. Naming Saved Data The Meter has a list of eight preset names under which measurement data is saved. Multiple records can be saved using the same name. For example, one preset name is Save. The first time a save operation is performed with that name, Save-1 is used to name the record in memory. The next time the Save name is used, the number increments to 2 and the record is

saved under the name of Save-2. The auto-incrementing number can be reset to 1 by positioning the menu selector next to the save name and then pressing the softkey labeled Reset #. To save a screen shot, a recording session, or MIN MAX or Peak record session, press the softkey labeled Save. To select the name from the preset list, press +Name. To save to the same name as before but with the next number, press the softkey labeled Save. This second method makes it easy to save a series of measurements simply by pressing the Save softkey twice for each save operation. When selecting the name for a save operation, position the menu selector next to the desired name using the cursor buttons. Next press the softkey labeled Save. Viewing Memory Data Viewing data stored in the Meter’s memory is performed through the save menu. Press the softkey labeled Save. Position the menu selector next to the menu item labeled View Memory and press the softkey labeled View. Note To view data stored in memory, the Meter must not be recording or performing a MIN MAX or peak record session. The Meter separates stored data into four different categories: Measurement, MIN MAX, Peak, and Recording. Use the cursor buttons to position the menu selector next to the desired saved data category and then press the softkey labeled View. The Meter displays the last record saved for the selected data category. If there are previously stored records, press the softkey labeled Prev or 5 to page back through previously stored records. Press the softkey labeled Next or 6 to page in the other direction. Press Close to return to normal Meter operation. Viewing Snapshot and Summary Data After selecting the MIN MAX, Peak, or Measurement category described in the Viewing Memory Data section above, pressing View only displays the information stored at the time a Save was performed. The display is reconstructed from this data when viewed. Viewing Trend Data For the Recording category, the interval and event data stored during a recording session are viewed on the Meter through a trend-plot view, similar to a strip-chart recorder. See the “Recording Measurement Data” section later in this manual for an explanation of interval and event data. After selecting the recording category described in the Viewing Memory Data section above and pressing View, the recording session’s summary screen is displayed (See Table 9). Press the softkey labeled Trend to display the recorded data in a trend-plot view. Table 7 shows the trend view along with a description of each of its components. To look at data stored in the individual records that make up the trend, move the cursor to any point along the plot by pressing 6 or 5. The value and timestamp of the minimum, maximum, and end-of-record values of the selected record are displayed at the bottom of the cursor. All data contained in a record can only be viewed on a PC running FlukeView Forms.

Table 7. Trend Data Display

23.456 VAC 08:13:05 6/28/07

reduces the x-axis time period by one half to reveal more details. recording period is displayed. X2 is one-half the recording time. continue until the x-axis time period is one second. labeled Prev and Next to select an item for deletion.

softkeys labeled Prev and Next to select an item for deletion. Next, press the softkey labeled Delete. A message asking to confirm the deletion will appear before anything is deleted from memory. Recording Measurement Data The Meter’s record feature collects measurement information over a user-specified duration. This collection of information is called a recording session. A recording session is made up of one or more measurement records. Each record contains measurement summary information covering the duration of the record. Each record contains the minimum, maximum, and average value detected over the record’s duration. In addition to measurement values, time stamps are also captured and saved with each record. The time stamps consist of the record start time, the time the maximum value was detected, the time the minimum value was detected, and the record end time. Some of a records data can be viewed through the Meter’s Viewing Trend Data function. Viewing all the data that makes up a record can only be viewed on a PC running FlukeView Forms software. There are two measurement record types that are captured during a recording session: interval and event. An interval record covers a user-specified interval. An event record has a duration determined by the activity of the measured signal and can interrupt an interval record. Even if an interval record is interrupted, a record will end and a new interval record will begin when the scheduled interval time expires. Event records are triggered by the measured signal varying more than an adjustable percentage of the value measured at the start of the record. This adjustable percent is called the Event Threshold for recording. In addition to the values and time stamps mentioned above, an event record also stores whether the signal was stable or unstable during the event record duration. To be classified as stable, the measured signal’s value must stay within the selected percentage of the start value for at least one second. Measured signals that exceed the percentage threshold in less than one second are classified as unstable. See the “Setting the Event Threshold Value” section later in this manual. Note For temperature measurements, the AutoHold threshold is a percent of 100 degrees. The default AutoHold threshold is 4% of 100 degrees, or 4 degrees Celsius or Fahrenheit. A record ends when one of the following occurs:

• The start of a new interval record.
• A range overload, causing the Meter to change range.
• A non-ranging overload, when in manual range or the highest range.
• The measured value changes more than 4 % of the measured value at the start of the record.
• The recording session terminates. A recording session termination can be caused by one of the following:

• Recording session duration expiring.
• Manually stopping the recording session. Setting up a Recording Session Before starting a recording session, setup the Meter for the measurements to be recorded. If needed, change the event threshold value (see the “Setting the Event Threshold Value section later in this manual). Press the softkey labeled Save to open the save menu. Using the cursor buttons, move the menu selector next to the menu item labeled Record and press the softkey labeled Record to open the configuration display. There are two variables in setting up a recording session: Recording session duration, and sample interval duration. Both variables affect the recording length and number of intervals recorded. These two variables may interact, in that setting one variable may adjust the other variable to fit the recording session within the available memory. The percentage of memory available at the beginning of a recording session is displayed below the duration and sample interval settings. Option values can be adjusted as follows: The sample interval can be set from one second to 99 minutes and 59 seconds. Recording session duration can be set from one minute to 99 days 23 hours 59 minutes.

Table 8. Recording Display A Recording session in progress icon. B Time and date when recording session started. C Time remaining until recording session stops. D Total number of event records recorded so far. E Reference value for relative measurements. F Total number of interval records recorded so far.

The Meter allocates memory in such a way as to guarantee capturing all of the user-specified sample intervals. Event records will also be captured until the Meter detects the allocated memory has been used up. At this point, events are not recorded, but the event counter continues to advance to indicate the total number of events that occurred. A plus (+) sign appears after the event count to indicate this condition. Note The maximum number of recorded sample intervals is 10,000. The maximum number of recorded events is 15,000 minus the number of sample intervals. These maximum numbers are proportionally decreased when the available memory is low. To change either of the two recording variables, use the cursor buttons to position the menu selector next to the desired menu item and press the softkey labeled Edit. Use 5 6 7 and 8 to move between and set each digit of the selected variable. If the battery level is anything but full, a message appears at the bottom of the record menu reminding you of the battery level before you start the recording session. Setting the Event Threshold Value Press the softkey labeled Setup to access the setup menu. Using the cursor buttons, move the menu selector next to the menu item labeled Recording and press the softkey labeled Recording to open the recording setup screen. Using the cursor buttons, move the menu selector next to the menu item labeled Event Threshold for Recording and then press the softkey labeled Edit. Press 7 or 8 to scroll through the event threshold values. With the desired value selected, press the softkey labeled Close. Starting a Recording Session Once the variables are set, press the softkey labeled Start, at which point s appears in the display and the green LED surrounding the power button (O) flashes. Table 8 shows the recording display and describes the information displayed. The Menu, Setup, Reference, and Temperature Offset softkey functions are not available while the Meter is recording. This ensures that measurements within a recording session are consistent. To extend battery life while recording, the Meter may enter a battery-saver mode five minutes after a push-button is pressed or IR communications activity ends. If the Auto Power-Off timeout is set to never, the battery-saver mode is disabled. Stopping a Recording Session The recording session will continue until the allocated memory is used, the batteries expire, the rotary switch is moved, a probe is inserted or removed from the A or mA/μA jacks, or the session is terminated by pressing the softkey labeled Stop. Table 9 shows the display and describes the displayed information after stopping a recording session. After stopping a recording session, choose to save the recording session, view the trend data (see the “Viewing Trend Data” section), or close the recording session. If the session wasn’t saved before pressing the Close softkey, the data is lost.

Table 9. Stopped Recording Display B Time and date when the recording began. D Number of event records detected. E Reference value for relative measurements. F Number of interval records detected. software to transfer the contents of a meter’s memory to a PC. to the FlukeView Forms Installation Guide or the on-line help. connect to the computer later for download.

Table 10 list some of the error messages the Meter may display and the conditions that may be causing the error. Table 10. Error Messages Leads in both A and mA/μA jacks. Rotary switch set to measure current but no lead in either A or mA/μA jack. Open Thermocouple Thermocouple wire is op en or thermocouple junction is corroded. No Thermocouple connected to the Meter’s input. The function selected requires a higher battery level to operate within specifications. Batteries were left out too long and the Meter’s date and time were lost. enough memory to store the information. off within 15 seconds after this message appears to preserve the Meter’s date and time.

True-rms Digital Multimeters Maintenance Maintenance XWWarning To avoid electrical shock or personal injury, repairs or servicing not covered in this manual should be performed only by qualified personnel as described in the 287/289 Service Information. General Maintenance Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives, isopropyl alcohol, or solvents. Dirt or moisture in the terminals can affect readings and can falsely activate the Input Alert feature. Clean the terminals as follows: 1. Turn the Meter off and remove all test leads. 2. Shake out any dirt that may be in the terminals. 3. Soak a clean swab with mild detergent and water. Work the swab around in each terminal. Dry each terminal using canned air to force the water and detergent out of the terminals. Testing the Fuses As shown in Figure 28, with the Meter in the S function, insert a test lead into the W jack and place the probe tip on the other end of the test lead against the metal of the current input jack. If the “Leads Connected Incorrectly” message appears, the probe tip has been inserted too far into the amps input jack. Back the lead out a bit until the message disappears and either OL or a resistance reading appears in the Meter’s display. The resistance value should be between 0.00 and 0.50 Ω for the A jack and 10.00 ±0.05 kΩ for the € jack. XWWarning To avoid electrical shock or personal injury, remove the test leads and any input signals before replacing the battery or fuses. To prevent damage or injury, install only Fluke specified replacement fuses with the amperage, voltage, and speed ratings shown in Table 11.

Figure 28. Testing the Current Fuses

Figure 30. Replacing Batteries and Fuses

True-rms Digital Multimeters In Case of Difficulty In Case of Difficulty If the Meter does not seem to work properly: 1. Check that all batteries are installed with the correct polarity. 2. Examine the case for damage. If damage is detected, contact Fluke. See the “Contacting Fluke” section earlier in this manual. 3. Check and replace (as needed) the batteries, fuses, and test leads. 4. Review this manual to verify correct operation. 5. If the Meter still does not work, pack it securely and forward it, postage paid, to the location provided by the appropriate Fluke contact. Include a description of the problem. Fluke assumes no responsibility for damage in transit. A Meter under warranty will be repaired or replaced (at Fluke’s option) and returned at no charge. See the registration card for warranty terms.

Table 11. Replacement Parts

1 Knob 1 2798434

2 Skin 1 2798418 (289)

3 Keypad 1 2578234

4 O-Ring 1 2740185

5 Case Top 1 2578178

6 Screw, Phillps 5 2743764

7 Mask, LCD 1 2760673 (289)

8 LCD Module 1 2734828

9 Shock Absorber 3 2793516

10 Spring Detent 1 2723772

11 RSOB Housing, Upper 1 2578283

12 Shield

Table 11. Replacement Parts (cont.)

13 RSOB Housing, Lower 1 2578290

14 Case Bottom 1 2578184

15 Shock Absorber, Battery Compartment 1 2793525

16 Battery Contact, Negative 2 2578375

17 Battery Contact, Positive 1 2578353

19 WFuse (F2), 11 A, 1000 V, FAST, Interrupt rating 20 kA 1 803293

21 Battery Door Assembly (includes tilt bail) 1 2824477

22 Screw, Phillips 7 853668

23 TL71 Right-Angle Test Lead Set 1 TL71

24 Alligator Clips, one black and one red 2 1670652 (Black)

25 Manual, Manual Pack, Fluke 287/289 1 2748851

WTo ensure safety, use exact replacement only. [1] The Users and Getting Started manuals are available through www.Fluke.com. Click on Support and then Product Manuals.

Figure 31. Replaceable Parts

Table 12. Accessories Fluke accessories are available from an authorized Fluke distributor.

Maximum voltage between any Terminal and Earth Ground: 1000 V Temperature Altitude nd Edition Safety Standards Measurement Category IV, Pollution Degree 2 nd Edition Pollution Degree 2

True-rms Digital Multimeters Detailed Specifications Electromagnetic Compatibility Standards (EMC) s Detailed Specifications Accuracy: Accuracy is specified for a period of one year after calibration, at 18 °C to 28 °C (64 °F to 82 °F), with relative humidity to 90 %. Accuracy specifications are given as: ±( [ % of reading ] + [ number of least significant digits ] ). Accuracy specification assumes ambient temperature stable at ±1 °C. For ambient temperature changes of ±5 °C, rated accuracy applies after 2 hours. To obtain full accuracy in DC mV, Temperature, Ohms and Lo (50) Ohms, let the meter stabilize 20 minutes after using LoZ. True-rms: AC mV, AC V, AC μA, AC mA, and AC A specifications are ac-coupled, true rms, and are specified from 2 % of range to 100 % of range, except 10 A range is specified from 10 % to 100 % of range. Crest Factor: Accuracy is specified with AC crest factor ≤ 3.0 at full-scale, increasing linearly to 5.0 at half-scale, except the 1000 V range, where it is 1.5 at full scale, increasing linearly to 3.0 at half-scale and 500 mV and 5000 μA, where it is ≤3.0 at 80 % of full scale, increasing linearly to 5.0 at half-scale. For non-sinusoidal waveforms add ±(0.3 % of range and 0.1 % of reading). AC Floor: When the input leads are shorted together in the ac functions, the Meter may display a residual reading up to 200 counts. A 200 count residual reading will cause only a 20 count change for readings at 2 % of range. Using REL to offset this reading may produce a much larger constant error in later measurements. AC+DC: AC+DC is defined as 22 dcac +

Accuracy Function Range Resolution 20 to 45 Hz 45 to 65 Hz 65 Hz to 10 kHz 10 to 20 kHz 20 to 100 kHz 50 mV [1] [6] AC mV [5] 5 V [1] [6] 50 V [1] 500 V [1] 0.01 V 1.5 % + 60 0.3 % + 25 0.4 % + 25 Not Spec’d Not Spec’d AC V 1000 V 0.1 V 1.5 % + 60 0.3 % + 25 0.4 % + 25 Not Spec’d Not Spec’d -70 to -62 dB [3] 0.01 dB 3 dB 1.5 dB 2 dB 2 dB 3 dB -62 to -52 dB [3] 0.01 dB 1.5 dB 1.0 dB 1 dB 1 dB 2 dB -52 to -6 dB [3] -6 to +34 dB [3] dBV 34 to 60 dB [3] 0.01 dB 0.2 dB 0.1 dB 0.1 dB Not Spec’d Not Spec’d Low pass filter [4] 2 % + 80 2 % + 40 2 % +10 -6 % -60 [2] Not Spec’d Not Spec’d L [4] 1000 V 0.1 V 2 % + 80 2 % + 40 2 % + 40 [7] Not Spec’d Not Spec’d [1] Below 5 % of range, add 20 counts. [2] Specification increases linearly from -2 % at 200 Hz to -6 % at 440 Hz. Range is limited to 440 Hz. [3] dBm (600 Ω) is specified by adding +2.2 dB to the dBV range values. [4] 289 only. [5] 500 mV range specification between 64.000 kHz and 67.000 kHz is +(0.0 % to -5 % of reading); 50 mV range specification between 64.000 kHz and 67.000 kHz is +(0.0 % to -6 % of reading ±40 counts). Valid from -20 °C to <18 °C and >28 °C to +55 °C. [6] Add 2.5 % above 65 kHz. [7] Range is limited to 440 Hz. See Detailed Specifications introduction for additional information.

True-rms Digital Multimeters Detailed Specifications AC Current Specifications Accuracy Function Range Resolution 20 to 45 Hz 45 to 1 kHz 1 to 20 kHz 20 to 100 kHz [4] 500 μA 0.01 μA 1 % + 20 0.6 % + 20 0.6 % + 20 5 % + 40 AC μA [3] 5000 μA 0.1 μA 1 % + 5 0.6 % + 5 0.6 % + 10 5 % + 40 50 mA 0.001 mA 1 % + 20 0.6 % + 20 0.6 % + 20 5 % + 40 AC mA [3] 400 mA 0.01 mA 1 % + 5 0.6 % + 5 1.5 % + 10 5 % + 40 5 A 0.0001 A 1.5 % + 20 0.8 % + 20 3 % + 40 [4] Not Spec’d AC A [2] 10 A [1] 0.001 A 1.5 % + 5 0.8 % + 5 3 % + 10 [4] Not Spec’d [1] 10 A range (10 % to 100 % of range). [2] 20 A for 30 seconds on, 10 minutes off. >10 A not specified. [3] 400 mA continuous; 550 mA for 2 minutes on, 1 minute off. [4] Verified by design and type tests. See Detailed Specifications introduction for additional information.

AC over DC, DC over AC, AC + DC [2] Function Range Resolution DC [2] 20 to 45 Hz 45 Hz to 1 kHz 1 to 20 kHz 20 to 35 kHz 50 mV [3] 0.001 mV 0.05 % + 20 [4] 1.5 % + 40 5 % + 40 DC mV 500 mV 0.01 mV 0.025 % + 2 [5] 5 V 0.0001 V 0.025 % + 2 1.5 % + 40 5 % + 40 50 V 0.001 V 0.025 % + 2 1.5 % + 40 5 % + 40 500 V 0.01 V 0.03 % + 2 Not Spec’d Not Spec’d DC V [1] 1000 V 0.1 V 0.03 % + 2 Not Spec’d Not Spec’d L [1] 1000 V 0.1 V 1 % + 20 Not Spec’d Not Spec’d Not Spec’d Not Spec’d [1] Add 20 counts in dual display ac over dc, dc over ac or ac+dc. [2] AC+DC ranges are specified from 2 % to 140 % of range , except 1000 V is specified from 2 % to 100 % of range. [3] When using the relative mode (REL Q) to compensate for offsets. [4] Add 4 counts/10 mV AC in dual display ac over dc, dc over ac or ac + dc [5] Add 10 counts/100 mV AC in dual displa y ac over dc, dc over ac or ac + dc.

True-rms Digital Multimeters Detailed Specifications DC Current Specifications Accuracy AC over DC, DC over AC, AC + DC [1] Function Range Resolution DC [1][3] 20 to 45 Hz 45 Hz to 1 kHz 1 to 20 kHz 20 to 100 kHz [5] 500 μA 0.01 μA 0.075 % + 20 1 % + 20 0.6 % + 20 0.6 % + 20 5 % + 40 DC μA [4] 5000 μA 0.1 μA 0.075 % + 2 1 % + 5 0.6 % + 5 0.6 % + 10 5 % + 40 50 mA 0.001 mA 0.05 % + 10 [6] 1 % + 20 0.6 % + 20 0.6 % + 20 5 % + 40 DC mA [4] 400 mA 0.01 mA 0.15 % + 2 1 % + 5 0.6 % + 5 1.5 % + 10 5 % + 40 5 A 0.0001 A 0.3 % + 10 1.5 % + 20 0.8 % + 20 3 % + 40 [5] Not Spec’d DC A [2] 10 A 0.001 A 0.3 % + 2 1.5 % + 10 0.8 % + 10 3 % + 10 [5] Not Spec’d [1] AC+DC ranges are specified from 2 % to 140 % of range. [2] 20 A for 30 seconds on, 10 minutes off. >10 A not specified. [3] Add 20 counts in dual display ac over dc, dc over ac or ac+dc. [4] 400 mA continuous; 550 mA for 2 minutes on, 1 minute off. [5] Verified by design and type tests. [6] Temperature coefficient: 0.1 X (specified accuracy)/ °C (<18 °C or > 28 °C)

Function Range Resolution Accuracy 50 Ω [1][3] 0.001 Ω 0.15 % + 20 500 Ω [1] 0.01 Ω 0.05 % + 10 5 kΩ [1] 0.0001 k Ω 0.05 % + 2 50 kΩ [1] 0.001 k Ω 0.05 % + 2 500 kΩ 0.01 k Ω 0.05 % + 2 5 MΩ 0.0001 M Ω 0.15 % + 4 30 MΩ 0.001 M Ω 1.5 % + 4 50 MΩ 0.01 M Ω 1.5 % + 4 50 MΩ up to 100 MΩ 0.1 M Ω 3.0 % + 2 Resistance 100 MΩ up to 500 MΩ 0.1 M Ω 8 % + 2 Conductance 50 nS [2] 0.01 nS 1 % + 10 [1] When using the relative mode (REL Q) to compensate for offsets. [2] Add 20 counts above 33 nS in 50 nS range. [3] 289 only. Temperature Specifications Temperature Resolution Accuracy [1,2] -200 °C to +1350 °C 0.1 °C 1 % + 10 -328 °F to +2462 °F 0.1 °F 1 % + 18 [1] Does not include error of the thermocouple probe. [2] Accuracy specification assumes ambient temperature stable to ±1 °C. For ambient temperature changes of ±5 °C, rated accuracy applies after 2 hours.

True-rms Digital Multimeters Detailed Specifications Capacitance and Diode Test Specifications Function Range Resolution Accuracy 1 nF [1] 0.001 nF 1 % + 5 10 nF [1] 0.01 nF 1 % + 5 100 nF [1] 0.1 nF 1 % + 5 1 μF 0.001 μF 1 % + 5 10 μF 0.01 μF 1 % + 5 100 μF 0.1 μF 1 % + 5 1000 μF 1 μF 1 % + 5 10 mF 0.01 mF 1 % + 5 Capacitance 100 mF 0.1 mF 2 % + 20 Diode Test 3.1 V 0.0001 V 1 % + 20 [1] With a film capacitor or bet ter, using relative mode (REL Δ) to zero residual.

Frequency Counter Specifications Function Range Resolution Accuracy 99.999 Hz 0.001 Hz 0.02 % + 5 999.99 Hz 0.01 Hz 0.005 % + 5 9.9999 kHz 0.0001 Hz 0.005 % + 5 99.999 kHz 0.001 Hz 0.005 % + 5 [1] Frequency (0.5 Hz to 999.99 kHz, pulse width >0.5 μs) 999.99 kHz 0.01 Hz 0.005 % + 5 Duty Cycle [2][3] 0.1000 ms 0.0001 ms 0.002 ms + 3 counts 1.000 ms 0.001 ms 0.002 ms + 3 counts 10.00 ms 0.01 ms 0.002 ms + 3 counts Pulse Width [2][3] 1999.9 ms 0.1 ms 0.002 ms + 3 counts [1] For 64.000 kHz to 67.000 kHz, accuracy = ±5 Hz, at -20 to +55 °C with R.H. 0 % to 90 % (0 °C to 37 °C), 0 % to 65 % (37 °C to 45 °C), 0 % to 45 % (45 °C to 55 °C). [2] For rise times <1 μs. Signals centered around trigger levels. [3] 0.5 to 200 kHz, pulse width >2 μs. Pulse width range is determined by the frequency of the signal.

True-rms Digital Multimeters Detailed Specifications Frequency Counter Sensitivity Approximate Voltage Sensitivity (rms sine wave) [1] Input Range

15 Hz to 100 kHz

[2] Approximate DC Trigger Levels DC Bandwidth [2] 50 mV 5 mV 1 MHz 5 mV & 20 mV 600 kHz 500 mV 25 mV 1 MHz 20 mV & 60 mV 1 MHz 5 V 0.25 V 700 kHz 1.4 V & 2.0 V 80 kHz 50 V 2.5 V 1 MHz 0.5 V & 6.5 V 1 MHz

500 V 25 V 300 kHz 5 V & 40 V 300 kHz

1000 V 50 V 300 kHz 5 V & 100 V 300 kHz

Approximate Current Sensitivity (rms sine wave) Input Range

15 Hz to 10 kHz

AC Bandwidth Approximate DC Trigger Levels DC Bandwidth 500 μA 25 μA 100 kHz 5000 μA 250 μA 100 kHz 50 mA 2.5 mA 100 kHz 400 mA 25 mA 100 kHz 5 A 0.25 A 100 kHz 10 A 1.0 A 100 kHz NA NA [1] Maximum input = 10 x range (1000 V maximum, 2 x 10 7 V-Hz product maximum). Noise at low frequencies and amplitudes may affect accuracy. [2] Typical frequency bandwidth with full scale (or maximum 2 x 10 7 V-Hz product) rms sine wave.

MIN MAX, Recording, and Peak Specifications Function Nominal Response Accuracy 200 ms to 80% (dc function) Specified accuracy ±12 counts for changes >425 ms in duration in manual range. MIN MAX, Recording 350 ms to 80 % (ac function) Specified Accuracy ±40 counts for changes >1.5 s in duration in manual range. Peak 250 μS (peak) [1] Specified accuracy ±100 counts [2] up to 5,000 count (full range) reading. For higher peak reading (to 12,000 counts), specified accuracy ±2 % [3] of reading. Crest Factor 350 ms to 80 % For periodic wavefo rms from 50 to 440 Hz ± (4 % + 1 count). [1] For repetitive peaks; 2.5 ms for single events. Pe ak not specified for 500 µA DC, 50 mA DC, 5 A DC. [2] 200 counts in 500 mV AC, 500 μA AC, 50 mA AC, 5 A AC. [3] 3 % in 500 mV AC, 500 μA AC, 50 mA AC, 5 A AC.

True-rms Digital Multimeters Detailed Specifications Input Characteristics Function Overload Protection [1] Input Impedance Common Mode Rejection Ratio (1 kΩ unbalance) Normal Mode Rejection L 1000 V 10 MΩ <100 pF >120 dB at dc, 50 Hz or 60 Hz >60 dB at 50 Hz or 60 Hz F mV 1000 V [2]

10 MΩ <100 pF >120 dB at dc, 50 Hz or 60 Hz >60 dB at 50 Hz or 60 Hz

K 1000 V 10 MΩ <100 pF (ac-coupled) >60 dB, dc to 60 Hz L 1000 V 3.2 kΩ <100 pF (ac-coupled) Not specified Not specified Full Scale Voltage Typical Short Circuit Current Function Overload Protection [1] Open Circuit Test Voltage To 500 kΩ >5 or 50 nS 500 Ω 5 k Ω 50 k Ω 500 k Ω 5 M Ω 50 M Ω e 1000 V [2] 5 V dc 550 mV <5 V 1 mA 100 μA 10 μA 1 μA 0.3 μA 0.3 μA 50e 1000 V [2]

20 V decreasing

to 2.5 V 500 mV 10 mA G 1000 V [2] 5 V dc 3.1 V dc 1 mA [1] Input is limited to the product of a V rms sinewave times frequency of 2 x 10 7 V-Hz. [2] For circuits <0.5 A short circuit. 660V for high energy circuits.

Burden Voltage (A, mA, μA) Function Range Burden Voltage 500 μA 102 μV/ μA 5000 μA 102 μV/ μA 50.000 mA 1.8 mV/mA mA, μA 400.00 mA 1.8 mV/mA 5.0000 A 0.04 V/A A 10.000 A 0.04 V/A