MM70 VAISALA | Alldatasheet

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Technical content

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 â 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) Vaisala HUMICAPâ Handheld Moisture Meter for Oil MM70 enables reliable detection of moisture in oil. The probe can be inserted directly into the process pipe through a ball valve without draining the oil in the system. 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 HUMICAPâ Technology MM70 incorporates the latest generation of the Vaisala HUMICAPâ 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 Windowsâ 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.

Measurement Performance, MMP78 Probe Water Activity Measurement range aw 0 ... 1 Accuracy (including nonlinearity, hysteresis and repeatability) when calibrated against salt solutions (ASTM E104-85): Maximum achievable accuracy (including nonlinearity, hysteresis and repeatability) when calibrated against high-quality, certified humidity standards: Response time (90%) at +20 °C (+68 °F) in still oil (with stainless steel filter) 10 min Sensor Vaisala HUMICAPâ 180L2 Recommended recalibration interval 1 year Typical long-term stability better than 0.01 aw / year Temperature Typical accuracy at +20 °C ±0.2 °C (±0.36 °F) Sensor Pt100 RTD Class F0.1 IEC 60751 Probe Operating Environment Operating pressure range max. 20 bar Operating pressure range during installation through ball valve max. 10 bar Oil flow range max. 1 m/s Typical temperature dependence of electronics EMC compliance EN61326-1, Portable Equipment Probe Mechanical Specifications Housing classification IP65 (NEMA 4) Probe material Stainless steel (AISI316L) Housing material APS/PC Blend Cable length between probe and indicator 1.9 m, 10 m extension available Weight 506 g 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 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 Battery Operation Time Typical charging time 4 hours Operation Times with MMP76 and MMP78 Continuous use 48 h typical at +20 ˚C (68 °F) Data logging use up to a month

Spare Parts and Accessories Weatherproof Carrying Case MI70CASE4 Ball valve set (incl. fitting body & blanking plug) HMP228BVS Probe cable extension, 10 m 213107SP MI70 Link software with USB cable 219687 MI70 Link software with serial port cable MI70LINK Analog output cable 27168ZZ Sensor protection HM47453SP Dew point measurement probes DMP74A/B Relative humidity measurement probes HMP75, HMP76, HMP77 Transmitter Connection Cables MMT162 219980SP MMT310 DRW216050SP MMT330 211339 Indicator dimensions in mm (inches) Adjustment range 250mm 170 (6.69) 13.5 (0.53) 12 .47) Probe dimensions in mm (inches) 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.www.vaisala.com