Vaisala HUMICAP HMP155 User Manual

Do not modify the Duration, Settling, and Temperature
settings unless instructed to do so. The sensor element may be permanently
damaged from overheating.
CAUTION!
Type PUR and press ENTER to proceed. The maximum interval is 14400 minutes (10 days).
>pur
Interval Purge : OFF ?
Interval : 720 min ?
Power-up Purge : OFF ?
Duration : 240 s ?
Settling : 240 s ?
Temperature : 180 'C ?
>
To activate the new interval settings immediately, reset the probe.
When chemical startup purge is enabled, wait for 6 minutes after startup before
taking measurements. The output channels are locked for the first operation
minutes to the initial measured values.
4.7 Extra sensor heating (Xheat) commands
HMP155 extra sensor heating follows the factory default values. You can enable or disable the
function, change the RH limit, and define the heating temperature and duration of this
function.
The output channels are locked during extra sensor heating and cooling period.
For meteorological applications, the extra sensor heating function is rarely used
as radiation shield prevent water droplets from going directly to humidity sensor.
4.7.1 XHEAT command
You can enable or disable the extra sensor heating with the XHEAT command.
Chapter 4 – Operation
51

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®