HMT310 Humidity and Temperature Transmitter

HMT310 Humidity and Temperature
Transmitter
Features
• 4th generation Vaisala HUMICAPâ
sensor for superior accuracy and
stability
• Full 0 … 100 %RH measurement,
temperature range up to +180 °C
(+356 °F), depending on model
• Small size, easy to integrate
• Insensitive to dust and most
chemicals
• Two analog signals and RS-232
ASCII output
• Pressure tolerance up to 100 bar
HMT310 incorporates the latest generation Vaisala HUMICAPâ sensor. The sensor is a
capacitive thin-film polymer sensor providing high accuracy, excellent long-term
stability and negligible hysteresis. It is insensitive to dust, particulate dirt and most
chemicals. HMT310 has various options for different environments and measurements.
Several Outputs, One
Connector
HMT310 is powered up with 10 … 35 VDC.
It has two analog outputs and an RS-232
serial output in one M12/8 pin connector.
The output signal and the supply power
travel in the same cable, the only cable
connected to the unit.
Chemical Purge
Chemical purge helps to maintain
measurement accuracy between
calibration intervals. 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, variety of mounting kits, rain
shield, sensor protection options and
probe cable lengths, warmed probe and
sensor heating for high humidity
conditions, and chemical purge for
applications risking an interference with
chemicals in the measuring environment.
The HMT310 series includes six models
for demanding applications:
• HMT311 for wall mounting
• HMT313 for duct mounting and tight
spaces
• HMT314 for high pressures up to 100
bar and vacuum conditions
• HMT315 for high temperatures
• HMT317 for high humidity applications,
warmed probe option
• HMT318 for pressurized pipelines up to
40 bar
Technical Data
Measurement Performance
Inputs and Outputs
Relative Humidity
Measurement range
0 ... 100 %RH
Sensor:
Vaisala HUMICAP180R
Typical applications
Vaisala HUMICAP180RC
Applications with chemical purge/
warmed probe
Vaisala HUMICAP180V
Catalytic sensor for H2O2
environments
Two analog outputs, selectable and
scalable
0 ... 20 mA or 4 ... 20 mA
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) of full scale
Serial output
RS232C
Connections
M12 8-pole connector with RS232C,
current/voltage outputs (two
channels) and Uin
Vaisala HUMICAP180VC
Catalytic sensor with chemical purge
for H2O2 environments
Response time (90 %) at +20 °C
(+68 °F) in 0.1 m/s air flow
17 s with grid filter
50 s with grid and steel, netting filter
60 s with sintered filter
Operating voltage
10 ... 35 VDC
External load
RL < 500 Ω
Factory calibration uncertainty
(+20 °C)
±0.6 %RH (0 ... 40 %RH)1)
±1.0 %RH (40 ... 97 %RH)1)
Startup time after power-up
3s
Minimum Operating Voltage
Accuracy (Including Non-Linearity, Hysteresis, and Repeatability) at a
Temperature Range of:
RS-232C output
10 VDC
Analog output
15 VDC
+15 ... +25 °C (+59 … +77 °F)
Probe heating and chemical purge
15 VDC
Pressures above 10 bara (145 psia)
24 VDC
±1 %RH (0 ... 90 %RH)
±1.7 %RH (90 ... 100 %RH)
-20 ... +40 °C (-4 … +104 °F)
±(1.0 + 0.008 x reading) %RH
-40 ... +180 °C (-40 … +356 °F)
±(1.5 + 0.015 x reading) %RH
Power Consumption
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)
Typical accuracy at +20 °C (+68 °F)
±0.2 °C (±0.36 °F)
Temperature sensor
Pt100 RTD Class F0.1 IEC 60751
1)
RS-232
12 mA
Uout 10 V (10 kΩ) channel 1 & channel 2
12 mA
Iout 20 mA (load 511 Ω) channel 1 &
50 mA
channel 2
Chemical purge at 24 VDC
+ 220 mA
Warmed probe at 24 VDC
+ 240 mA
Mechanical Specifications
Defined as ±2 standard deviation limits. Small variations possible, see also calibration certificate.
Transmitter housing material
G-AlSi10Mg
0.7
0.6
Transmitter base material
PPS
0.5
IP rating
IP66
0.4
Probe cable length
2 m, 5 m, or 10 m
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, H2O2 filter
∆ °C
0.3
0.2
0.1
°C
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-80
-60
-40
-20
0
20
40
60
80
100
120
140
160
Accuracy over temperature range
180
Spare Parts and Accessories
Rain shield
Operating Environment
Operating temperature for electronics
-40 ... +60 °C (-40 ... +140 °F)
Storage temperature
-55 ... +80 °C (-67 ... +176 °F)
Operating pressure
HMT314
HMT318
HMT315, HMT317
0 ... 100 bar
0 ... 40 bar
vapor tight
EMC compliance
EN61326-1, Industrial environment
ASM211103
USB cable
238607
PPS Plastic Grid with Stainless Steel
Netting
DRW010281SP
PPS Plastic Grid Filter
DRW010276SP
Sintered Filter AISI 316L
HM47280SP
Stainless Steel Filter
HM47453SP
Stainless Steel Filter with Membrane
214848SP
Catalytic H2O2 Filter
231865
M9x1
Ø 12 (0.47)
Probe dimensions in mm (inches)
37.5 (1.48)
78.5 (3.09)
HMT318 Probe
98.5 (3.88)
Transmitter body dimensions in mm (inches)
43(1.69)
60.5 (2.38)
72.5 (2.85)
ø12 (0.47)
5 (0.20)
M22×1.5 or
NPT 1/2"
HMT313 Probe
41 (1.61)
Ø4.5 (0.177)
120 (4.72)
170 (6.69)
ø13.5 (0.53)
HMT314 Probe
41 (1.6)
51 (2.0)
192 (7.56)
253 (9.96)
102 (4.02)
HMT315 Probe
M9×1
ø 12 (0.47)
115 (4.53)
37.5 (1.48)
79.5 (3.13)
99.5 (3.92)
HMT317 Probe
Published by Vaisala | B210769EN-H © Vaisala 2017
www.vaisala.com
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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