
31
Technical Data
Humidity
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
Electrical Connections
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 U
in
Operating voltage 10 ... 35 VDC
Minimum operating voltage
RS232C output 10 VDC
Analog output 15 VDC
Probe heating and chemical purge 15 VDC
Pressures above 10 bara (145 psia) 24 VDC
Power consumption
RS232 12 mA
U
out
10 V (10 kOhm) channel 1 & channel 2 12 mA
I
out
20 mA (load 511 Ohm) channel 1 & channel 2 50 mA
Chemical purge at 24 VDC + 220 mA
Warmed probe at 24 VDC + 240 mA
External load R
L
< 500 Ohm
Startup time after power-up 3 s
General
Operating temperature range for
electronics
-40 ... +60 °C (-40 ... +140 °F)
Storage temperature range -55 ... +80 °C (-67 ... +176 °F)
Operating pressure
HMT314 0 ... 100 bar
HMT318 0 ... 40 bar
HMT315, HMT317 vapor tight
Transmitter housing material G-AlSi10Mg
Transmitter base material PPS
Housing classification IP66
Cable feed through
alternatives
8-pole connector with 5 m cable,
Female 8-pin connector screw joint for
cable diameter 4 ... 8 mm
Probe cable length 2m, 5m, or 10m
Sensor protection PPS grid with stainless steel net,
PPS grid, Sintered filter, Membrane
stainless steel filter, VHP filter
Complies with EMC standard EN61326-1, Industrial environment
Accessories
Rain shield 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 VHP Filter 231865
Measured Values
RELATIVE HUMIDITY
Measurement range 0 ... 100 %RH
Sensor
Vaisala HUMICAP
®
180R typical applications
Vaisala HUMICAP
®
180RC applications with chemical
purge/warmed probe
Vaisala HUMICAP
®
180VHP catalytic sensor for H
2
O
2
environments
Vaisala HUMICAP
®
180VHPC catalytic sensor with chemical
purge for H
2
O
2
environments
Accuracy (including non-linearity, hysteresis, and repeatability)
at a temperature range of
+15 ... +25 °C (+59 … +77 °F) ±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
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 (+68 °F) 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)
Typical accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)
Accuracy over temperature range (see graph below)
Temperature sensor Pt100 RTD Class F0.1 IEC 60751
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