Vaisala WAC155 - Manual (Page 44)

User's Guide ______________________________________________________________________
42 ___________________________________________________________________M210822EN-A
SETHEA
The SETHEA command configures the wind sensor heating control.
Sensor heating is provided to prevent frost in sensor bearings. Heaters
are powered by an external power supply, which is not the same as the
sensor system power supply. Heating is not enabled by default. If
necessary, heating can also be forced.
SETHEA [active] [tos] [thys] <value><cr>
If heating is enabled, it is turned on when temperature drops below
TOS-THYS. Heating is turned off when temperature rises above
TOS+THYS. With the default values of TOS=4 and THYS=1, heating
is enabled at +3 °C, and disabled at +5 °C.
Typical commands:
SETHEA ACTIVE 1 (enable sensor heating)
SETHEA TOS 3 (set heating control limit to 3 degrees Celcius)
Example:
>sethea active 1
ACTIVE = 1
TOS = 4.00
THYS = 1.00
>
GETHEA
The GETHEA command displays the current heating status and
temperature.
where
active = Enables the wind sensor heating functionality. Possible
values: 0 = disabled (default) 1 = enabled 2 = forced
tos = Control limit for heating in degrees Celcius, range -
55…+125 (default 4)
thys = Thermal hysteresis in degrees Celcius, range -55…+125
(default 1)
value = The value for the option