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HMT310 Humidity and Temperature
Transmitter
Reliable Vaisala
HUMICAP® technology
The HMT310 incorporates the latest-
generation Vaisala HUMICAP® Sensor.
The Vaisala HUMICAP® Sensor is a
capacitive thin-lm polymer sensor.
It features high accuracy, excellent
long-term stability and negligible
hysteresis. It is insensitive to dust,
particulate dirt and most chemicals.
Several outputs, one
connector
The HMT310 is powered up with
12 ... 35 VDC. It has two analog
outputs and an RS-232 serial output.
The output signal and the supply
power travel in the same cable, the
only cable connected to the unit.
The Vaisala HUMICAP
®
Humidity and Temperature Transmitter HMT310 models
(from left to right): HMT313, HMT317, HMT314, HMT318, HMT315 and HMT311.
Chemical purge
Chemical purge helps to maintain
measurement accuracy between
calibraton intervals and it involves
heating the sensor to remove harmful
chemicals. The function can be
initiated manually or programmed to
occur at set intervals.
Optional functions
The following optional functions are
available: several probes for various
applications, calculated humidity
quantities, different mounting kits,
sensor protection options and probe
cable lengths, warmed probe and
sensor heating for high humidity
conditions (HMT317), and chemical
purge for applications risking an
interference with chemicals in the
measuring environment.
Features/Benefits
▪
Next-generation Vaisala
HUMICAP® Sensor for excellent
accuracy and stability
▪
Full 0 ... 100 %RH
measurement, temperature
range up to +180 °C
(depending on model)
▪
Small size, easy to integrate
▪
Insensitive to dust and most
chemicals
▪
NIST traceable
Ref. B210769EN-C ©Vaisala 2009
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
Technical data
Electrical connections
Two analog outputs,
selectable and scalable
0 ... 20 mA or 4 ... 20 mA
Typical accuracy of analog output at +20 °C
+0.05 % full scale
Typical temperature dependence
of analog output
0.005 %/°C (0.003 %/°F)
of full scale
Serial output RS--232C
Connections M12 8-pole connector with RS-232C,
current outputs (two channels) and U
in
Operating voltage 12 ... 35 VDC, the maximum
operating voltage for a device with
sensor heating is 24 VDC
Power consumption 30 mA with RS-232
External load R
l
< 500 Ohm
Startup time after powerup 3 s
General
Operating temperature range for
electronics -40 ... +60 °C (-40 ... +140 °F)
Storage temperature range -55 .... +80 °C (-67 ... +176 °C)
Operating pressure
HMT314 0 ... 100 bar
HMT318 0 ... 40 bar
HMT315, HMT317 vapor tight
Transmitter housing material G-AlSi10Mg
Transmitter base material ABS/PC
Housing classification IP65
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 PPS grid with stainless steel net,
PPS grid, Sintered filter
Membrane stainless steel filter
Complies with EMC standard EN61326-1, Industrial environment
Note: When using the current output, the RF field susceptibility
level according to standard EN61000-4-3 with a frequency band
of 110 ... 165 MHz, is only 3V/m (generic environment) with the
specified accuracy.
Measured values
RELATIVE HUMIDITY
Measurement range 0 ... 100 %RH
Sensor
Vaisala HUMICAP
®
180R typical applications
Vaisala HUMICAP
®
180RC applications with chemical
purge and/or warmed probe
Accuracy (incl. non-linearity, hysteresis and repeatability)
at a temperature range of
+15 ... +25 °C ±1 %RH (0 ... 90 %RH)
±1.7 %RH (90 ... 100 %RH)
-20 ... +40 °C ±(1.0 + 0.008 x reading) %RH
-40 ... +180 °C ±(1.5 + 0.015 x reading) %RH
Factory calibration uncertainty
(+20 °C)
±0.6 %RH (0 ... 40 %RH)*
±1.0 %RH (40 ... 97 %RH)*
* Defined as ±2 standard deviation limits. Small variations possible, see
also calibration certificate.
Response time (90 %) at +20 °C 17 s with grid filter
in 0.1 m/s air flow 50 s with grid and steel, netting filter
60 s with sintered filter
TEMPERATURE
HMT311 -40 ... +60 °C (-40 ... +140 °F)
HMT313 -40 ... +80 °C (-40 ... +176 °F)
or -40 ... +120 °C (-40 ... +248 °F)
HMT314, HMT315, HMT317, HMT318 -70 ... +180 °C (-94 ... +356 °F)
Accuracy over temperature range (see graph below)
Typical temperature
dependence of electronics
+0.05 °C/°C (+0.005 °F/°F)
Temperature sensor Pt100 IEC751/3 class B
Δ
°C
°C
-0.7
0.7
0.6
0.5
0.4
0.3
0.2
0.1
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
0
0-60 -40 -20 20 40 60 80 100
120
140
160
180
-80
HUMICAP
®
is a registered trademark of Vaisala.
- HUMIDITY / DEW POINT / 1
- Vaisala – at your service 3
- Building Automation 5
- Cleanrooms and Chambers 5
- Humidity 7
- 37.5 (1.48) 9
- 78.5 (3.09) 9
- 98.5 (3.88) 9
- Ø 12 (0.47) 9
- 120 (4.72) 10
- 170 (6.69) 10
- 41 (1.61) 10
- Duct installation kit 11
- Temperature Transmitters 12
- Transmitter 15
- Indoor Applications 17
- Chambers 22
- Vaisala INTERCAP 23
- Humidity and Temperature 23
- Probe HMP60 23
- Vaisala HUMICAP 24
- Probe HMP110 24
- HMI41 Indicator and 26
- HMP46 High Temperature Probe 26
- Performance 29
- Interchangeable Probe 29
- Available Options 29
- Technical Data 30
- HMK15 Humidity Calibrator 31
- DTR500 Solar Radiation and 33
- Precipitation Shields 33
- The Vaisala HUMICAP 36
- Transmitter Series HMW80 37
- HVAC Applications 39
- WITH OPTIONAL CURRENT MODULE 40
- **0 … 20 mA (R 40
- 1/8"-27 NPT 41
- Ensure dry 43
- OEM Applications 46
- Transmitter Series for Oil 51
- Moisture in Oil 51
- Prevent it 53
- Transmitter for Oil 54
- 0 ... 2 % 57
- Demanding OEM Applications 59
- GMM111 Carbon Dioxide Module 60
- Demand-controlled Ventilation 62
- GMM20W Carbon Dioxide Module 65
- GML20 and GML20T 66
- Process Measurements 67
- Humidity and 68
- Measurement 68
- Environments 68
- Hazardous Areas 69
- PTU300 Models 70
- Barometric Pressure 70
- Reliable and accurate 72
- HVAC solutions 72
- Take the lab to the field 74
- Standard PTB330TS 75
- PTB210 Digital Barometer 76
- Wind Measurement 81
- Vaisala Service Oering 82
- Vaisala Service Offering 82
- Your Warranty 83
- PRICE LIST 84
- DMT132 Dewpoint Transmitter 85
- Datasheet – front 85
- Vaisala Filters 89
- Vaisala Filters continued 89
- Order Guides 90
- Note: The Universal AC 91
- For high temperatures 92
- For high humidities 93
- For wall mounting 95
- For general use 96
- With Two Standard Chambers 101
- For Pressurized Processes 103
- DMT345 Dewpoint Transmitter 104
- DMT152 Dewpoint Transmitter 105
- DMT242 Dewpoint Transmitte 106
- For pressurized pipelines 108
- GMT221 and GMT222 CO 109
- Transmitters 109
- OMT355 Oxygen Transmitter 110
- 1 Transmitter type 111
- (-40...+140 °F) 112
- (-4...+140 °F) 112
- (+32...+140 °F) 112
- Order Guide 114
- Features/Benefits 115
- Technical data 116
- 3 Cable length 1.0 m 117
- PTB110 Barometer 118
- WXT520 Weather Transmitter 119
- Vaisala Contact Information 121
- ACCURATE 122
- For more information, visit 123
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