Vaisala HUMICAP HMP155 User Manual

Table 22 Quantities measured by HMP155
Quantity Abbreviation Metric unit Imperial unit
Relative humidity RH %RH %RH
Temperature T °C °F
Additional T-probe temperature Ta °C °F
Table 23 Quantities calculated from measured quantities
Quantity Abbreviation Metric unit Imperial unit
Dew point / Frost point temperature
(Td/f)
TDF °C °F
Dew point temperature (Td) TD °C °F
Mixing ratio (x) X g/kg gr/lb.
Wet bulb temperature (Tw) TW °C °F
The modifiers are shown in the following table.
Table 24 FORM command modifiers
Modifier Description
quantity
Quantity name (for example RH, T or TDF)
x.y
Length modifier (number of digits and decimal places)
#t
Tabulator
#r
Carriage return
#n
Line feed
“"
String constant
#xxx
Special character with decimal code "xxx"
U5
Unit field and length
ADDR
Probe address with 2 characters [00 ... 99]
CS2
Modulus-256 checksum of message sent so far, hexadecimal format.
CS4
Modulus-65536 checksum of message sent so far, hexadecimal format.
Chapter 4 – Operation
47

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®