Vaisala HMP Series, User Manual

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0
0.1
0.2
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0.4
A
cc
ur
ac
y
[+
/-
°
C]
Temperature [
°
C]
-4
0
-3
0
-2
0
-1
0 0
10
20 3
0
4
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5
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6
0
70
8
0
9
0
10
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0
130 140 150 160 170 180
0.5
-70
-60
-50
Figure 46 HMP7 temperature measurement accuracy over full range
Table 31 HMP7 operating environment
Property Description/Value
Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
Operating temperature of probe head −70 … +180 °C (−94 … +356 °F)
Operational pressure < 10 bar
Operating environment Suitable for outdoor use
Measurement environment For air, nitrogen, hydrogen, argon, helium,
oxygen, and vacuum
1)
IP rating of probe body IP66: Dust-tight. Protected from powerful water
jets from any direction.
1) Consult Vaisala if other chemicals are present. Consider safety regulations with flammable
gases.
Table 32 HMP7 inputs and outputs
Property Description/Value
Operating voltage 18 … 30 V DC
Current consumption 10 mA typical, 500 mA max.
Digital output RS-485, non-isolated
Protocols Modbus RTU
Table 33 HMP7 output parameters
Output parameter name and unit
Absolute humidity (g/m
3
)
Relative humidity (%RH)
Chapter 9 – Technical data
79