Vaisala HMP155 - Manual (Page 77)

Chapter 7 ____________________________________________________________ Technical Data
VAISALA _______________________________________________________________________ 75
Accuracy of Wet Bulb Temperature °C
Relative humidity
Temp. 10 20 30 40 50 60 70 80 90 100
-40 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 — —
-20 0.21 0.21 0.22 0.22 0.22 0.22 0.23 0.23 — —
0 0.27 0.28 0.28 0.29 0.29 0.29 0.30 0.30 0.31 0.31
20 0.45 0.45 0.45 0.44 0.44 0.44 0.43 0.43 0.42 0.42
40 0.84 0.77 0.72 0.67 0.64 0.61 0.58 0.56 0.54 0.52
60 1.45 1.20 1.03 0.91 0.83 0.76 0.71 0.67 0.63 0.60
Accuracy of Dew point Measurement
Find the intersection of the dew point temperature curve and the dew
point difference reading (process temperature-dew point temperature) on
the x-axis and read the accuracy in dew point measurement on the y-axis.
0508-017
Figure 15 Accuracy of Dew point Measurement
Inputs and Outputs
Table 20 Outputs
Description Value
Voltage output
0 ... 1 V, 0 ... 5 V, 0 ... 10 V
Resistive Pt100 4-wire connection
RS-485
Minimum operating voltages
0…5 V output
12 V
0…10 V output, probe heating,
chemical purge or XHEAT 16 V