Vaisala HMT370EX - Figure 66 a W Measurement Accuracy; Table 40 HMP378 F and HMP378 H Ppm Accuracy

Property Description/Value
Sensor HUMICAPâ 180L2
Accuracy
3)
±0.01 a
w
(±1 %RS)
Factory calibration uncertainty ±0.6 %RH (0 … 40 %RH)
±1.0 %RH (40 … 95 %RH)
Temperature
Measurement range −40 … +180 °C (−40 … +356 °F)
Accuracy at +20 °C (+68 °F) ±0.2 °C (0.36 °F)
1) 0 … 1 a
w
corresponds to 0 … 100 %RH
2) At +20 °C (+68 °F) in still oil.
3) In range 0 … 0.5 a
w
, including non-linearity, hysteresis, and repeatability. See accuracy graph
below.
0
0
0.1
±0.01
0.2
±0.02
0.3
±0.03
0.4 0.5 0.6 0.7 0.8
0.9
1.0
±0.04
a
w
reading accuracy
a
w
reference
T = 0 … +80 °C
T = −40 … 0 °C, +80 ... +180 °C
Figure 66 A
w
measurement accuracy
Table 40 HMP378F and HMP378H ppm accuracy
Property Value
JET A-1 fuel ppm accuracy (HMP378H)
1)
±15 % of the reading (typical)
Moisture in transformer oil ppm accuracy
(HMP378F)
2)
±10 % of the reading (typical)
1) For more information on HMP378H measurements, see HMP378H probe option for
measuring JET A-1 fuel moisture and temperature (page 79)
2) Note: valid for mineral transformer oil. For more information on HMP378F measurements,
see HMP378F probe option for measuring oil moisture and temperature (page 79)
HMT370EX User Guide M212305EN-B
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