Vaisala PTU300 - Setting Sensor Heating; Setting Humidity Sensor Heating Using Display;Keypad

USER'S GUIDE____________________________________________________________________
144 _________________________________________________________________ M210796EN-F
Setting Sensor Heating
This function is optionally available only in transmitters with
HUMICAP
®
180 C sensor. It should be used only with the warmed probe.
The sensor heating is recommended for the high humidity environments
where even a small temperature differences can cause water to condense
on the sensor. The sensor heating speeds up the recovery of the humidity
sensor from condensation.
Sensor heating starts-up when the relative humidity of the measuring
environment reaches the RH-value set by a user (RH-limit). The user can
define the RH-sensor heating temperature as well as the duration of the
heating.
After the heating cycle the humidity conditions are checked and new
sensor heating is performed if the predefined conditions are reached
again.
NOTE
During the sensor heating the outputs are locked to the values measured
before the heating cycle.
Setting Humidity Sensor Heating using
Display/Keypad
When the PTU300 leaves the factory the sensor heating follows the
factory default values. You can enable/disable the function, change the
RH-limit and define the heating temperature and duration of this
function.
1. Open the Main Menu by pressing any of the arrow buttons.
2. Select Measuring, press the right arrow button
.
3. Select Sensor heating, press the ON key
.