DM70

DM70 VAISALA | Alldatasheet

Document overview

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Technical content

Features

• Designed for industrial spot- checking and field calibration
• Three models: accurate measurement ranges from
• Vaisala DRYCAP â sensor with unique autocalibration function
• Sensor withstands condensation
• Data can be logged and transferred to a PC via MI70 Link software
• Traceable calibration (certificate included)
• Fast response, enhanced by sensor purge option
• Variety of sampling cell options for connection to pressurized processes Vaisala DRYCAPâ Handheld Dew Point Meter DM70 offers accurate and fast measurement for industrial dew point applications, such as compressed air, metal treatment, and plastics drying. Benefits
• Compact, small and light
• Intuitive user interface
• Low maintenance need due to superior long-term stability
• Sensor withstands condensation and fully recovers from getting wet DM70 measures dew point temperature accurately over a wide measurement range. The probe may be inserted directly into pressurized processes, and it responds rapidly from ambient to process conditions. The DM70 meter is suitable for direct process dew point measurement in a wide temperature and pressure range. For more demanding applications, DM70 can be used with Vaisala sampling cells or with Vaisala DRYCAPâ Sampling System DSS70A. Vaisala DRYCAPâ technology DM70 is fitted with the Vaisala DRYCAPâ sensor. The sensor provides reliable, stable and high-performance dew point measurement. Autocalibration detects on-line possible measurement inaccuracies and automatically corrects dry-end drift in the calibration curve. Three probes to choose from Three probe models, all with autocalibration, are available. The DMP74A and DMP74B models are both general purpose probes. The DMP74C model is specifically developed for SF6 gas. The B and C probe models have an additional sensor purge feature that heats and dries the sensor, making the response from ambient to dry conditions exceptionally fast. Intuitive user interface DM70 has a versatile and easy-to-use, menu-based user interface, a clear graphical LCD display, and datalogging capability. It can also be used as a tool for reading the output of fixed Vaisala dew point transmitters, such as DMT242, DMT132, DMT143, DMT152, and DMT340. DM70 displays one to three parameters at a time, either numerically or graphically. Several humidity units can be selected. In addition, DM70 includes conversion from gas pressure dew point to ambient pressure dew point. An analog output is also available. MI70 Link Windowsâ software The optional Vaisala MI70 Link Windowsâ software and the USB connection cable form a practical tool for transferring logged data and real time measurement data from DM70 to a PC.

DMP74A measurement performance Dew point Measurement range (typical) −50 … +60 °C (−58 … +140 °F) Dew point accuracy vs. measurement conditions 10 30 -10 -20 50 60 Dew point temperature (°C) Temperature of measured gas (°C) -10 0 -30 -40 -50 -60 -70 -80 4020 Accuracy < ±2 °C Td Water vapor saturation line Accuracy < ±1 °C Td Dew point measurement range lower limit Accuracy not specified Accuracy (A probe) −40 … +60 °C ±2 °C (±3.6 °F) (see graph) Response time Flow rate 0.2 m/s, 1 bar pressure, +20 °C (+68 °F) 63 % [90 %] 0 → −40 °C Td (32 → −40 °F Td) 20 s [120 s] −40 → 0 °C Td (−40 → 32 °F Td) 10 s [20 s] Dew point sensor Vaisala DRYCAPâ 180S Temperature Measurement range −10 … +60 °C (+14 … +140 °F) Accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F) Typical temperature dependence of electronics Temperature sensor Pt100 RTD Class F0.1 IEC 60751 Other variables available Dew point converted to atmospheric pressure, ppm volume and ppm weight concentration, absolute humidity, mixing ratio, relative humidity Operating environment, all probe models Operating temperature −10 … +60 °C (+14 … +140 °F) Operating pressure for DMP74A, DMP74B 0 … 20 bara (0 … 290 psia) Operating pressure for DMP74C 0 … 10 bara (0 … 150 psia) Sample flow rate No effect on measurement accuracy Measured gases Non-corrosive gases EMC compliance EN 61326-1, Basic environment Mechanical specifications, all probe models Probe material (wetted parts) Stainless steel (AISI 316L) Sensor protection Sintered filter (AISI 316L) Mechanical connection G1/2” ISO228-1 thread with bonded seal ring (U-seal) IP rating IP65 (NEMA 4) Weight 350 g (12 oz) DMP74B and DMP74C (for SF6 gas) measurement performance Dew point Measurement range (typical) −70 … +30 °C (−94 … +86 °F) Dew point accuracy vs. measurement conditions 10 30 -10 -20 50 60 Dew point temperature (°C) Temperature of measured gas (°C) -10 0 -30 -40 -50 -60 -70 -80 4020 range high limit Dew point measurement Accuracy < ±2 °C Td Dew point measurement range lower limit Accuracy not specified Accuracy not specified Dashed line: For DMP74C the ±2 °C accuracy range is limited to −50 °C Td when used in SF6 gas. Accuracy (B and C probe) ±2 °C (±3.6 °F) (see graph) Response time Flow rate 0.2 m/s, 1 bar pressure, +20 °C (+68 °F) 63 % [90 %] 0 → −60 °C Td (32 → −76 °F Td) 50 s [340 s] −60 → 0 °C Td (−76 → 32 °F Td) 10 s [20 s] Dew point sensor Vaisala DRYCAPâ 180M Temperature Measurement range −10 … +60 °C (+14 … +140 °F) Accuracy at +20 °C (+68 °F) (−76 … +68 °F) ±0.2 °C (±0.36 °F) Typical temperature dependence of electronics Temperature sensor Pt100 RTD Class F0.1 IEC 60751 Other variables available Dew point converted to atmospheric pressure, ppm volume and ppm weight concentration

MI70 measurement indicator Operating environment Operating temperature −10 ... +40 °C (+14 … +104 °F) Operating humidity 0 ... 100 %RH, non-condensing Inputs and outputs Max. no of probes 2 PC interface MI70 Link software with USB or serial port cable Analog output 0 ... 1 VDC Power supply Rechargeable NiMH battery pack with AC adapter or 4 × AA size alkalines, type IEC LR6 Output resolution 0.6 mV Accuracy 0.2 % full scale Temperature dependence 0.002 %/˚C (0.01 %/˚F) full scale Minimum load resistor 10 kΩ to ground Mechanical specifications Housing classification IP54 Housing materials ABS/PC blend Weight 400 g (14 oz) Compatibility EMC compliance EN 61326-1, portable equipment Other Menu languages English, Chinese, Spanish, Russian, French, Japanese, German, Swedish, Finnish Display • LCD with backlight

• Graphic trend display of any parameter
• Character height up to 16 mm (0.63 in) Alarm Audible alarm function Data logging capacity 2700 real time data points Logging interval 1 s to 12 h Logging duration 1 min ... memory full Resolution 0.01 %RH, 0.01 °C/°F, 0.01 hPa, 0.01 aw, 10 ppm / 0.01 %CO2 Battery operation time Typical charging time 4 hours Operation times Continuous use: 48 h typical at +20 ˚C (+68 °F) Data logging use: Up to a month Spare parts and accessories Weatherproof hard plastic carrying case MI70CASE3 Soft carrying case MI70SOFTCASE MI70 USB PC connection cable (for use with MI70 Link software) 1) 219687 Analog output signal cable 27168ZZ Extension cable for probe (10 m (33 ft)) 213107SP Portable sampling system with case (see separate DSS70A datasheet) DSS70A Connection cables for fixed Vaisala dew point transmitters For DMT242 transmitter 27160ZZ For DMT340 series 211339 For DMT152, DMT132, DMT143, DPT145, and DPT146 transmitters 219980SP 1) Vaisala MI70 Link software for Windows is available at www.vaisala.com/mi70link. MI70 indicator dimensions in millimeters (inches) Probe dimensions in millimeters (inches) Published by Vaisala | B010162EN-J © Vaisala 2020 All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. Any reproduction, transfer, distribution or storage of information contained in this document is strictly prohibited. All specifications — technical included — are subject to change without notice. www.vaisala.com