380385

380385 EXTECH | Alldatasheet

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User's Manual 10KV Digital High Voltage Insulation Tester Model 380385

380385 V1.5 3/04 2 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website at www.extech.com (click on Contact Extech and go to Service Department to request an RA number). A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsib le for shipping charges, freight, insurance and proper packaging to prevent damage in tr ansit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenanc e or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any di rect, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no othe r warranty, whether written or oral, is expressed or implied. Introduction Congratulations on your purchase of the Extech High Voltage Insulation Tester. This device has four pre-set voltage test ran ges (up to 10kV) and measures insulation resistance to 500G Ω. Other voltage test values can be selected using the ±500V step buttons. This professional meter, with proper care, will provide years of safe reliable service. Safety 1. Circuits under test must be de-energiz ed and isolated before connections are made. 2. Circuit connections must not be touched during a test. 3. After insulation tests, capacitors must be discharged. 4. Test leads (including alligator clips) mu st be in good working order, clean and without broken or cracked insulation. 5. When servicing, use only s pecified replacement parts. 6. Environmental conditions:

• Indoor use only; Installation category III 300V
• Pollution degree 2
• Altitude up to 2000 meters
• Relative Humidity 80% max.; Temperature 0 to 40 o C International Safety Symbols Caution, refer to this manual before using this meter Dangerous Voltages; risk of electric shock Meter is protected throughout by double or reinforced insulation

380385 V1.5 3/04 3 Specifications General specifications Display 2 x 20 character alphanumeric multi-function dot matrix Range selection 20 ranges in 500V steps with automatic ranging. Preset buttons for 1KV, 2.5KV, 5KV, and 10KV Bargraph Displays voltage ramp, soak, and decay Automatic discharge After automatic & manual stop or upon completion of test Low battery indicator "Replace battery" displayed when battery voltage is low Power source Eight 1.5V ‘C’ cells; Battery life 40 hrs (no load at 10kV) Auto Power off After 5 minutes of inactivity Enersave TM mode Shorter test time to conserve battery life Test Leads Supplied. RED (length = 108”) with GREEN guard lead. BLACK lead is 42”. Operating conditions 32 to 104 o F (0 to 40 o C); < 80% RH Storage conditions 14 to 140 o F (-10 to 60 o C); < 80% RH Dimensions 13 x 10.2 x 6.3” (330 x 260 x 160mm) Weight 7.9 lbs (3.6kg) Range Specifications DC Test Voltages Resistance Ranges (in GΩ) Short Circuit Current Accuracy Resolution 0.5KV 25 1KV 50 1.5KV 75 2KV 100 100mA 2.5KV 125 3KV 150 3.5KV 175 4KV 200 4.5KV 225 5KV 250 120mA 5.5KV 275 6KV 300 6.5KV 325 7KV 350 7.5V 375 8KV 400 8.5KV 425 9KV 450 9.5KV 475 170mA 10KV 500 360mA ± (3% + 2d) 1MΩ Note: Voltage Regulation is +20% -5% unless current limited.

380385 V1.5 3/04 4 Meter Description 1. Test lead jacks 2. Dot Matrix Display 3. Keypad 4. Battery compartment (on bottom) 5. Test lead compartment latch Preparation Warning: Ensure that the circuit under test does not include devices or components that can be damaged by 10KVDC; such devices incl ude power factor correction capacitors, low voltage mineral insulated cables, electroni c light dimmers, ballasts and starters for fluorescent lamps. Connecting the Test Leads to the meter The Black (Earth) , Red (Line), and Green (Guard) test leads connect to the meter directly above the dot matrix display (the meter jacks are color coded). NOTE: The Green (Guard) lead is attached to the Red lead and shoul d be used (refer to applications section next). Connecting the Test Leads to the device under test The Black (Earth) lead is connected to the conductive material. The Red (Line) and Green (Guard) leads are connected to insulating, sheathing, and covering material as shown in the following applications section.

380385 V1.5 3/04 5 Operation Powering the meter Press the ON button to turn the unit on. Press the OFF button to turn the unit off. Insulation Resistance Measurements Warning: The circuit under test must be completely de-energized and isolated before making test connections. 1. After turning the unit on, the display will prompt the user to select a test voltage (diagram at right). 2. Select the test voltage by pressing one of the preset voltage buttons ( 1KV, 2.5KV, 5KV, 10KV) or by pressing the Voltage Adjust buttons (500+, 500-) to step through the available test voltages in 500V steps. 3. The resistance range for the selected voltage is indicated on the dot matrix display as shown above. 4. Press the TEST START / STOP button again. 5. The display will prompt the user to connect the leads. Press the TEST START/STOP button to start testing. 6. The elapsed test time appears on the upper line (right hand side) of the display. The resistance reading is shown on the upper left hand side of the display. The lower line shows the test voltage in bargraph format (see diagram at right). 7. The HOLD icon will appear in place of the bargraph when the test is complete and the voltage has been discharged. WARNING: DO NOT REMOVE THE TEST LEADS BEFORE THE HOLD DISPLAY APPEARS. 8. The meter automatically discharges the system at the end of the test. 9. The meter automatically powers down after 5 minutes. The Enersave TM Mode Enersave TM mode conserves battery life by performing a relatively short test (10 seconds). The Enersave TM mode is the default test mode. To bypass this mode and run a longer test (100 seconds max), press and hold the TEST button for 3 seconds when starting a test. Bargraph Voltage Display The bargraph represents the voltage present on the test leads as it rises, soaks, and decays. The bargraph appears on the lower left of the dot matrix display during a test. Automatic Under/Over Range Resistance Detect If the display shows the message “LOW M Ω”, the test should be interrupted immediately by pressing the TEST button. This message indicates that the insulation under test has broken down and the meter is trying to inject a high potential onto a short circuit. If ‘HIGH’ appears, it is likely that the test configurat ion is open. Check the test set-up then test again. Elapsed Timer The test duration is indicated on the display. This is particularly useful in determining whether an insulating material under test will break down in a given amount of time. Select Voltage: 250000MΩ V = 5000V Connect Leads . . . . R=9.998MΩ 6.8s

380385 V1.5 3/04 6 Manual Test STOP To stop a test in progress, press the TEST button. The test will immediately end and the system will automatically discharge. Automatic Test STOP When in the default Enersave TM mode, the test automatically stops after approx. 10 seconds. The test automatically stops after appr ox. 100 seconds if the meter is not in the Enersave TM mode. Live Circuit Warning If the test leads are connected to a live circ uit (approx. 500V), a warning beeper will sound and the meter will display “Live Warning…Circuit Live…”. In this case, correct the problem and retest. Automatic Discharge At the end of a test, the meter automatically discharges the high voltage. The automatic discharge status is reflected on the displa y. During discharge the beeper will sound and, when completely discharged, the HOLD icon appears on the display.

Applications

Measuring Power Tools and Small Appliances For small appliances, connect the Black (EAR TH) lead to conductors and the Red (LINE) lead to insulating material. For single or double insulated power tools, one lead should be connected to the device’s chuck, blade, etc. and the other lead to one of the AC power cord conductors (test both conductors in turn). Refer to the power tool application diagram below. Testing Motors AC Motors Disconnect the motor from the line by: a. Disconnecting the wires from the motor terminals or b. Opening the main switch If the main switch is opened, and the motor also has a motor-starter, then the starter must be held in the ON position. With the main switch opened, the measured resistance will include the resistance of the motor wire and all other components between the motor and the main switch. If a weakness is indicated, the motor and other components should be checked individually. If the motor is disconnected at the motor terminals, connect the RED lead to the grounded motor housing and the BLACK lead to one of the motor leads. AC Plug For 2 or 3 prong plugs, connect the RED lead to one conductor at a time Connect the BLACK lead to the chuck Connect RED lead to grounded housing Connect BLACK lead to the motor leads

380385 V1.5 3/04 7 DC Motors 1. Disconnect the motor from the line. 2. To test the brush rigging, field coil s and armature, connect the RED lead to the grounded motor housing and the BLACK lead to the brush on the commutator. 3. If the resistance measurement indicates a weakness, raise the brushes off of the commutator and separately test the armature, field coils and brush rigging by connecting one lead to each individually, leaving the other connected to the grounded motor housing. This also applies to DC Generators. Testing Single Conductor Cables 1. Completely disconnect the cable under test from its source and destination. 2. Connect the test leads to the cable as shown at right. Testing Multi Conductor Cables 1. Completely disconnect the cable under test from its source and destination. 2. Refer to the diagrams below for three possible tests. Transformer Testing Transformer tests are performed with the transformer completely disconnected from the line and the load. Note that the case ground should not be removed. The five tests listed below will completely test a single-phase transformer. Note that at least 1 minute should be allowed between each test. 1. High voltage winding to low voltage winding and ground 2. Low voltage winding to high voltage winding and ground 3. High voltage winding to low voltage winding (pictured at right) 4. High voltage winding to ground 5. Low voltage winding to ground Core Insulation Sheath Covering EARTH GUARD LINE Testing one conductor to all of the conductors Testing one conductor to earth One conductor to all minus ground EARTH LINE LINE EARTH GUARD GUARD LINE EARTH Connect the BLACK lead here Connect the RED lead here

380385 V1.5 3/04 8 Support Hotline (781) 890-7440 Tech support: Ext. 200; Email: support@extech.com Repair/Returns: Ext. 210; Email: repair@extech.com Website: www.extech.com Maintenance Battery Replacement When ‘REPLACE BATTERY’ appears on the display, replace the eight 1.5V ‘C’ batteries. 1. Ensure that the meter is powered down and that the test leads are not connected 2. Close the instrument cover and turn the instrument upside down 3. Remove the screw located on the bottom of the meter 4. Remove the battery compartment cover 5. Replace the eight batteri es ensuring proper polarity 6. Affix the rear cover and secure the rear screw Cleaning Periodically wipe the case with a dry cloth. Do not use solvents or abrasives to clean this instrument. Repair and Calibration Extech offers complete repair and calibration se rvices for all of the products we sell. For periodic calibration, NIST certification or repair of any Extech product, call customer service for details on services available. Ex tech recommends that calibration be performed on an annual basis to insure calibration integrity. Copyright © 2002 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.