DM70 Handheld Dewpoint Meter for Spot-Checking Applications Features • Designed for industrial spotchecking and field calibration • Three models: accurate measurement ranges from -60 to +60 °C (-76 ... +140 °F) • Vaisala DRYCAPâ 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 Vaisala DRYCAPâ Handheld Dewpoint Meter DM70 offers accurate and fast measurement for industrial dew point applications, such as compressed air, metal treatment and plastics drying. Benefits Intuitive User Interface Vaisala DRYCAPâ Technology DM70 is fitted with the Vaisala DRYCAP 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. â • 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 cell adapters or with Vaisala DRYCAPâ Sampling System DSS70A. Three Probes to Choose From Three probe models, all with autocalibration, are available. The A and B models are both general purpose probes. The C 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. 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 The optional MI70 Link Windows software and the USB connection cable form a practical tool for transferring logged data and real time measurement data from the DM70 to a PC. DM70 Technical Data Measurement Performance, DMP74A Probe Dew Point Dew Point Measurement range (typical) -50 ... +60 °C (-58 ... +140 °F) Dew Point Accuracy vs. Measurement Conditions Accuracy (A probe) -40 ... +60 °C Measurement Performance, DMP74B and DMP74C (for SF6 gas) Probes ±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 (typical) -70 ... +30 °C (-94 ... +86 °F) Dew Point Accuracy vs. Measurement Conditions Dotted line: For DMP74C the ±2 °C accuracy range is limited to -50 °C Td when used in SF6 gas. Accuracy (B and C probe) -60 ... +20 °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 → -60 °C Td (32 → -76 °F Td) 50 s [340 s] Measurement range -10 ... +60 °C (+14 ... +140 °F) -60 → 0 °C Td (-76 → 32 °F Td) 10 s [20 s] Accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F) Dew point sensor Vaisala DRYCAPâ 180M Typical temperature dependence of electronics ±0.005 °C/°C (±0.005 °F/°F) Temperature 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 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 ±0.005 °C/°C (±0.005 °F/°F) Temperature sensor Pt100 RTD Class F0.1 IEC 60751 Other Variables Available 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 for measurement accuracy Measured gases Non-corrosive gases EMC compliance EN61326-1, Generic Environment Mechanical Specifications 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 Dew point converted to atmospheric pressure, ppm volume and ppm weight concentration MI70 Measurement Indicator Battery Operation Time Operating Environment Typical charging time 4 hours Operating temperature -10 ... +40 °C (+14 … +104 °F) Operation Times Operating humidity 0 ... 100 % RH, non-condensing Continuous use 48 h typical at +20 ˚C (68 °F) Storage temperature -40 ... +70 °C (-40 ... +158 °F) Data logging use up to a month Inputs and Outputs Max. no of probes 2 Power supply Rechargeable NiMH battery pack with AC adapter or 4xAA size alkalines, type IEC LR6 PC interface MI70 Link software with USB or serial port cable Analog Output Scale 0...1 VDC Output resolution 0.6 mV Accuracy 0.2 % full scale Temperature dependence 0.002 %/˚C full scale Minimum load resistor 10 kΩ to ground Mechanical Specifications Housing classification IP54 Housing materials ABS/PC blend Weight 400 g Compatibility EMC compliance EN61326-1, 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 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 MI70 dimensions in millimeters (inches) Spare Parts and Accessories Weatherproof Carrying Case MI70CASE3 Soft Carrying Case MI70SOFTCASE MI70 Link software with USB cable 219687 MI70 Link software with serial port cable MI70LINK Analog output cable 27168ZZ 10 m (32.81 ft) extension cable for probe 213107SP Portable Sampling System (see separate data sheet) DSS70A Connection Cables for Fixed Vaisala Dew Point Transmitters For DMT242 transmitter 27160ZZ For DMT340 series 211339 For DMT152, DMT143, and DMT132 transmitters 219980SP Probe dimensions in millimeters (inches) Published by Vaisala | B010162EN-G © Vaisala 2017 www.vaisala.com All rights reserved. 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