Vaisala HMD70U Service Manual Page 96
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94
MMT310 Series Moisture and Temperature
Transmitter for Oil
The Vaisala HUMICAP
®
Moisture and
Temperature Transmitter Series for
Oil MMT310 is a fast and reliable on-
line detector for moisture in oil.
Reliable Vaisala
HUMICAP® 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
The MMT310 series measures
moisture in oil in terms of the water
activity (aw) and temperature (T).
Water activity directly indicates if
there is a risk of free water formation.
The measurement is independent of
oil type, age, and temperature.
Two probe options: MMT317 and MMT318
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
The MMT310 series 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
The MMT318 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.
The MMT317 has a small pressure-
tight probe with optional Swagelok
fittings.
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.
Features/Benefits
▪
Continuous measurement of
moisture in oil
▪
Proven Vaisala HUMICAP®
Sensor, 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
▪
NIST traceable calibration
▪
Applications: e.g. monitoring
of transformer oil and of
lubrication systems in marine
and paper industry
- HUMIDITY / DEW POINT / 1
- PRESSURE / WEATHER 1
- ACC URATE 2
- Humidity 4
- Dew Point 4
- Mounting Options 9
- Graphical Display of 10
- History and 10
- Measurement Trends 10
- Outputs and Power Supply 10
- Options for Every Need 10
- Flexible Installation 11
- For Moderate Humidities 11
- Vaisala HUMICAP® 12
- Performance 12
- Measurement Trends and 12
- Real Time History 12
- 41 (1.6) 13
- 51 (2.0) 13
- 192 (7.56) 13
- 253 (9.96) 13
- 37.5 (1.48) 14
- 79.5 (3.13) 14
- 99.5 (3.92) 14
- Temperature Transmitters 16
- HMP361 for wall mounting 17
- HMP363 for confined spaces 17
- HMP364 for high pressure 17
- HMP365 for high temperature 18
- HMP367 for high humidities 18
- HMP368 for pressurized 18
- Transmitter 22
- Interchangeable Probe 24
- Fast, On-Site Calibration 26
- Measures both Humidity 26
- Resistant to Chemicals 28
- Vaisala INTERCAP 30
- Humidity and Temperature 30
- Transmitter Series HMW80 30
- HVACApplications 32
- Demanding Applications 34
- Unique Warmed Probe 34
- Vaisala HUMICAP® Sensor 34
- Chambers 36
- Probe HMP60 38
- Vaisala HUMICAP 40
- Probe HMP110 40
- Three Probes 42
- MI70 Link 42
- Reliable and Cost-ecient 47
- HVAC Products 47
- Fast and Easy-to-Use 48
- HMK15 Humidity Calibrator 50
- DTR500 Solar Radiation 54
- Versatile Outputs and 61
- (Wireless) Data Collection 61
- Easy Installation 61
- Probe Specifications 62
- Ensure dry 65
- Measure Humidity Directly 66
- DMT345, Accurate in Hot 66
- OEM Applications 70
- Low Maintenance 72
- Dewpoint temperature (°C) 75
- DMT132 Dewpoint Transmitter 76
- DEW POINT 77
- CALCULATED VARIABLES 77
- Indoor Applications 78
- 110 (4 .33) 79
- 85 (3.35) 79
- 33 (1.30) 79
- DSS70A Portable 82
- Sampling System 82
- Sampling Cells for 82
- Pressurized Processes 82
- Online Reliability 86
- Savings Across the Board 86
- Risk-Free, Greener 86
- Solution 86
- The Fruit of Experience 86
- Multiparameter Transmitter 88
- When Moisture is a Problem 89
- Knowledge is Power 89
- Literally 89
- Transmitter Series for Oil 90
- Moisture in Oil 90
- The Vaisala HUMICAP 91
- Hand-Held 91
- R1/2" ISO7/1 92
- Prevent it 95
- Transmitter for Oil 96
- Features/Benefits 100
- Technical Data 101
- 0 ... 2 % 102
- Interchangeable Probes 104
- Demanding OEM Applications 106
- GMM111 Carbon Dioxide Module 108
- Vaisala CARBOCAP 110
- Technology 110
- Two Sampling Methods 110
- Features/Benefi ts 112
- Demand-controlled Ventilation 114
- GMM112 Carbon Dioxide Module 118
- GMM20W Carbon Dioxide Module 120
- Pressure 122
- PTU300 Models 123
- Mechanics 126
- Accessories 126
- Dimensions 126
- IN CONTROLLED ENVIRONMENTS 127
- Take the Lab to the Field 130
- For more information, visit 131
- Standard PTB330TS 132
- PTB210 Digital Barometer 134
- Calculate 137
- Vaisala BAROCAP® 138
- Accuracy and Stability 138
- Applications 138
- Ideal for outdoor 140
- Carefree maintenance 140
- Operating Environment 142
- Available Options 142
- Figure 1 143
- Figure 2 with Process 143
- Valve Actuator and 143
- Test Jacks 143
- Measuring Acoustic 146
- Precipitation 146
- Wind Measurement 150
- Vaisala Service Offering 152
- Accredited Body 153
- Accredited Parameters 153
- Vaisala Filters 154
- Vaisala Filters continued 155
- Vaisala Contact Information 158
- ASIA AND PACIFIC 159
- NORTH AMERICA 159
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