Change compensation setpoint values – Vaisala GMP231 User Manual
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User's Guide _______________________________________________________________________
36 ___________________________________________________________________ M211501EN-C
Change Compensation Setpoint Values
Use the ENV command to show or set the setpoint values of the
environmental compensation parameters. To change a value, give the
parameter name and value as arguments to the ENV command.
ENV [temp|pres|oxy|hum|xtemp|xpres|xoxy|xhum] [value]
There are four compensation parameters. Values of the parameters are
stored in two places: eeprom (non-volatile memory, values retained
during power off) and RAM (volatile memory that loses the values when
probe is reset, and where values are loaded from non-volatile memory at
startup). As the number of writes to eeprom is limited to 30000 cycles by
memory implementation, you must write all continuously updated values
to RAM to avoid wearing out the eeprom. A second set of parameters
(with X prefix in the name) is provided for this purpose.
When writing permanent values to eeprom, use these parameter names.
Note that updating these parameters does not update the parameters in
RAM (the values that are currently used by the probe).
temp
= Compensation temperature. Range -40 ... 100 °C.
pres
= Compensation pressure. Range 500 ... 1150 hPa.
oxy
= Oxygen content of background gas. Range 0 ... 100%.
hum
= Relative humidity of background gas. Range 0 ... 100%.
When writing to RAM, use the parameter names below. The ranges are
the same as for the permanent parameters.
xtemp
= Compensation temperature that is stored in RAM.
xpres
= Compensation pressure that is stored in RAM.
xoxy
= Oxygen content of background gas that is stored
in RAM.
xhum
= Relative humidity of background gas that is stored
in RAM.
Example (Show current compensation values; all compensations are
enabled. Note that temperature and pressure compensations use internal
measurement, so the value in use is constantly changing):
env
Temperature (C) : 37.00
Pressure (hPa) : 1013.20
Oxygen (%O2) : 19.70
Humidity (%RH) : 93.00
In use:
Temperature (C) : 23.10
Pressure (hPa) : 1011.28
Oxygen (%O2) : 19.70
Humidity (%RH) : 93.00