Vaisala HUMICAP HMP155 User Manual

Description Value
At +20 … +60 °C (+68 … +140 °F) ±(0.055 + 0.0057 × |temperature|) °C
Accuracy with passive (resistive) output
According to Tolerance Class AA IEC 60751
1)
±(0.1 + 0.0017 × |temperature|) °C
Accuracy with RS-485 output
At −80 … +20 °C (−112 … +68 °F) ±(0.176 - 0.0028 × |temperature|) °C
At +20 … +60 °C (+68 … +140 °F) ±(0.07 + 0.0025 × |temperature|) °C
1) Tolerance Class AA IEC 60751 corresponds to IEC 751 1/3 Class B
Figure 13 HMP155 accuracy over temperature range: voltage and RS‑485
Table 32 Dew point calculation specifications
Property Description/value
Accuracy at −20 … +40 °C (−4 … +104 °F) ±0.6 at 90 … 100 %RH
Table 33 Quantities measured by HMP155
Quantity Abbreviation Metric unit Imperial unit
Relative humidity RH %RH %RH
Chapter 7 – Technical data
81

Vaisala HUMICAP HMP155 Specifications

General

Humidity Measurement Range	0 to 100 %RH
Operating Humidity Range	0 to 100 %RH
Protection Class	IP65
Measurement Parameters	Humidity and Temperature
Temperature Measurement Range	-40 to +60 °C
Temperature Accuracy	±0.2 °C
Operating Temperature Range	-40 to +60 °C
Humidity Sensor	Vaisala HUMICAP®