MMT310 VAISALA | Alldatasheet

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Technical content

Features

  • Continuous measurement of moisture in oil
  • Proven Vaisala HUMICAP â sensor, over 15 years in oil applications
  • Measurements in lubrication, hydraulic and transformer oils
  • Excellent pressure and temperature tolerance
  • Measuring water activity - ppm calculation for transformer oil
  • Small size, easy to integrate
  • Traceable calibration for measurement and analog outputs (certificates included)
  • Applications: e.g. monitoring of transformer oil and of lubrication systems in marine and paper industry Vaisala HUMICAPâ Moisture and Temperature Transmitter Series for Oil MMT310 is a fast and reliable online detector for moisture in oil. Reliable Vaisala HUMICAPâ Technology The MMT310 series incorporates the latest generation of the Vaisala HUMICAP sensor, developed for demanding moisture measurement in liquid hydrocarbons. The sensor’s excellent chemical tolerance provides accurate and reliable measurement over the wide measurement range. Measuring Water Activity MMT310 measures moisture in oil in terms of the water activity (aw) and temperature (T). Water activity indicates directly whether there is a risk of free- water formation. The measurement is independent of oil type, age, and temperature. Water Content as PPM Calculation for Transformer Oils PPM units are traditionally used in transformer applications. They indicate the average mass concentration of water in oil. The ppm calculation for mineral oil based transformer oil is optional in the MMT310 series. Diverse Applications and Demanding Conditions MMT310 can be used in lubrication and hydraulic systems as well as in transformers. It can be used for on-line moisture monitoring and as a control function, allowing separators and oil purifiers to be started only when necessary. Installation Options MMT310 has two adjustable probe lengths. The transmitter can be ordered with a ball-valve set that enables the insertion and removal of the moisture probe for calibration, without the need to empty the oil system. MMT317 has a small pressuretight probe with optional Swagelok fittings. An optional rain shield is available for outdoor installations. Several Outputs, One Connector The MMT310 series has two analog outputs and an RS-232 serial output. The output signals and the supply power travel in the same cable, the only cable connected to the unit.

Measurement range aw (%RS) 0 … 1 (0 … 100 %) Accuracy (Including Non-Linearity, Hysteresis, and Repeatability): 0 … 0.9 (0 … 90 %) 0.9 … 1.0 ±0.02 ±0.03 Response time (90 %) at +20 °C in still oil (with stainless steel filter) 10 min Sensor Vaisala HUMICAPâ 180L2 Temperature Typical accuracy at +20 °C (68 °F) ±0.2 °C (±0.36 °F) Sensor Pt100 RTD Class F0.1 IEC 60751 Mechanical Specifications IP rating IP66 Weight example: MMT317 with 2 m cable (Weight depends on selected probe and cable) 476 g Cable feed through alternatives 8-pole connector with 5 m cable Female 8-pin connector screw joint for cable diameter 4 ... 8 mm Sensor protection Stainless steel grid standard filter Stainless steel grid filter for high flow rates (> 1 m/s) Materials Transmitter housing G-AlSi 10 Mg Transmitter base PPS Probe Cable Length MMT317 2 m, 5 m, or 10 m MMT318 2 m, 5 m, or 10 m Probe installation MMT317 Swagelokâ NPT 1/2", ISO 3/8" or ISO 1/2" Probe installation MMT318 Fitting bodies ISO 1/2", NPT 1/2" Operating Environment Pressure range for MMT318 with ball- valve up to 120 °C 0 ... 40 bar Pressure range for MMT317 0 ... 10 bar EMC compliance EN61326-1, Industrial environment Inputs and Outputs Two analog outputs, selectable and scalable 0 … 5 V or 0 … 10 V 1 … 5 V available through scaling Typical accuracy of analog output at +20 °C ±0.05 % full scale Typical temperature dependence of analog output 0.005 %/˚C (0.003 %/°F) full scale Serial output RS-232C Connections 8-pole connector with RS232C, current/ voltage outputs (two channels) and Uin Operating voltage 10 ... 35 VDC External load RL < 500 Ω Startup time after power-up 3 s Minimum Operating Voltage RS232C output 10 VDC Analog output 15 VDC Pressures above 10 bara (145 psia) 24 VDC Power Consumption RS232C 12 mA Uout 10 V (10 kΩ) Channel 1 & channel 2 12 mA Iout 20 mA (load 511 Ω) Channel 1 & channel 2 50 mA Spare Parts and Accessories Rain shield ASM211103 USB cable 238607 Stainless steel filter HM47453SP Stainless steel filter (high flow rate) 220752SP Ball-Valve Set BALLVALVE-1

Transmitter body, dimensions in mm (inches) MMT317 probe, dimensions in mm (inches) MMT318 probe, dimensions in mm (inches) Published by Vaisala | B210831EN-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