MM70 Handheld Moisture and Temperature Meter
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MM70 Handheld Moisture and Temperature Meter - 1

MM70 Handheld Moisture and Temperature Meter for Spot-Checking in Oil Features • Measurement independent of oil type, age and temperature • In-line process checking through ball valve, no need to drain the oil • Rugged and reliable construction • Excellent pressure and temperature tolerance • Data can be logged and transferred to a PC • Proven Vaisala HUMICAP® Sensor: over 15 years in oil applications • Compatible with Vaisala's fixed oil moisture instruments • No reference oil needed for recalibration • Traceable calibration (certificate included) MM70 measures moisture in oil in terms of the water activity (aw) and temperature (T). Water activity directly indicates whether there is a risk of free water formation. The measurement is independent of oil type, age and temperature. PPM Calculation Included MM70 has an embedded model for expressing moisture as ppm in mineral transformer oil. The customer can enter up to three other oil models into the meter's memory. Numerical and Graphical Display MM70 features a multilingual, menu-based user interface and a backlit LCD display. The measurement parameters can be numerically and graphically displayed and logged into the meter's memory at the same time. An analog output option is also available. Vaisala HUMICAP® Technology MM70 incorporates the latest generation of the Vaisala HUMICAP® Sensor, developed for demanding moisture measurements in liquid hydrocarbons. The sensor's excellent chemical tolerance provides accurate and reliable measurement over the measurement range. Speedy Service - Once a Year The meter can be recalibrated by sending the probe to Vaisala Service, or customers can calibrate the instrument themselves using a standard relative humidity calibration. Multi-Probe Operation One or two probes can be connected simultaneously. Maintenance teams can use additional Vaisala dew point or relative humidity probes for other tasks. For example, a dew point probe is ideal for checking the moisture inside washed and dried oil tanks. Connection to PC The optional MI70 Link Windows® software in combination with a USB connection cable is used to transfer logged data and real time measurement data from the MM70 to a PC.

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MM70 Handheld Moisture and Temperature Meter - 2

Operating Environment Operating temperature Operating humidity Storage temperature Inputs and Outputs Max. no of probes Power supply PC interface Analog Output Scale Output resolution Accuracy Temperature dependence Minimum load resistor Mechanical Specifications Housing classification Housing materials Weight Compatibility EMC compliance Other Menu languages Display Alarm Data logging capacity Logging interval Logging duration Resolution Water Activity Measurement range aw 0 ... 1 Accuracy (including nonlinearity, hysteresis and repeatability) when calibrated against salt solutions (ASTM...

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MM70 Handheld Moisture and Temperature Meter - 3

Spare Parts and Accessories Weatherproof Carrying Case MI70CASE4 Published by Vaisala | B210960EN-F © Vaisala 2017 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.

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