Vaisala HMT310 - Manual (Page 62)

User's Guide _______________________________________________________________________
62 ___________________________________________________________________ M210619EN-E
Setting Humidity Sensor Heating
When HMT310 leaves the factory the 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 the heating
period.
Sensor Heating ON/OFF
Enables or disables the sensor heating.
Syntax: XHEAT x
Where
x = ON/OFF (default = OFF)*
* In the HMT317 fuel cell model, XHEAT is enabled in the factory
settings.
Example:
>xheat on
Extra heat : ON
>xheat off
Extra heat : OFF
>
Setting Heating Parameters
Whenever the RH value seen by the sensor exceeds the predefined RH
limit the humidity sensor is warmed up to the predefined temperature.
The duration of the heating can also be defined.
After the heating cycle the humidity conditions are checked and a new
sensor heating is activated if the predefined conditions are reached again.
Syntax: XHEAT
Type the values after the question mark. The ranges available:
- Extra heat RH limit: 0 ... 100 %RH (default: 95 %RH, heating
function starts up above the setpoint)
- Extra heating temperature: 0 ... 200 °C (default: 100 °C)
- Extra heating time: 0 ... 255 s (default: 30 s)