Chapter 4 ________________________________________________________________ Operation
VAISALA____________________________________________________________________ 53
Chemical purge
Calibration
values
Measured values
after chemical
exposure
Humidity
Output signal
0507-056
Figure 16
Decrease of Sensor Gain Due to Interfering
Chemical and Effect of Chemical Purge Process
Automatic/Manual Chemical Purge
When HMT310 leaves the factory the automatic chemical purge (if
selected) takes place repeatedly with the time intervals set in the
factory. You can change the interval in which the purge takes place by
using serial commands. This may be necessary if the measuring
environment contains high concentrations of interfering chemicals.
The automatic chemical purge can be also turned off if necessary.
Automatic Chemical Purge Settings
PUR Turn ON/OFF Automatic
Chemical Purge
This command enables or disables automatic chemical purge.