Automatic/manual chemical purge, Figure 16, Effect of chemical purge process – Vaisala HMT310 User Manual
Page 58
User's Guide _______________________________________________________________________
58 ___________________________________________________________________ M210619EN-E
NOTE
Using purge is not recommended when the transmitter is powered with
USB. For information on HMT310 operating voltages, see section Power
Supply Requirements on page 34.
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.
NOTE
It is not recommended to alter any other purge settings than the interval.
Chemical purge
Calibration
values
Measured values
after chemical
exposure
Humidity
O
ut
put
si
gna
l