Vaisala LT31 - Page 151

Chapter 5 ________________________________________________________________ Operation
VAISALA ______________________________________________________________________ 151
Command Description
CALIBRATE TEMPERATURE EXTERNAL
value
Makes single point calibration with the external
temperature sensor connected to the interface unit, the
value should be between -99 and 99.
EVENTS evt A forced event is inserted into the event list.
LEVEL 0 Changes the operation level to the user level.
PASSWORD string Change password of advanced level.
RESET yes/no Hardware reset by watchdog circuitry, verification yes/no
asked.
SET
SET AC_STATUS_SUMMARY OFF Indication of autocalibration in the status word (refer to
Table 17 on page 166) is given for the time 5 seconds
prior to the message reporting (default).
SET AC_STATUS_SUMMARY ON Indication of autocalibration in the status word (refer to
Table 17 on page 166) is given for the time since the
last message reporting.
SET BASELINE number Configures the LT31 system base length in meters.
SET BL_RANGE minimum_BL maximum_BL Under and overrange values for BL readings are set. The
settings will be taken into account for SKOPO2
emulation only.
SET BLOW_ON_WMO number Whenever PWD codes a WMO code greater than or
equal to number, the blowers will be switched on for at
least five minutes.
SET LM ON Enables background luminance sensor LM21 data
polling in the LT31 system.
SET LM OFF Disables background luminance sensor LM21 data
polling and photo switch reading in the LT31 system
(default).
SET CONTAMINATION_COMPENSATION
LM OFF
Disables the compensation function of LM21.
SET CONTAMINATION_COMPENSATION
LM ON
Enables measurement value compensation caused by
window contamination in background luminance sensor
LM21 (default).
SET DEFAULTS yes/no Restores the default factory settings, verification yes/no
asked.
SET DEW _HEATER LM OFF Disables dew heaters operation and monitoring of LM21.
Set OFF when operated in environments where dew
heaters of LM21 are not needed (ambient temperature
does not drop below 12 C).
SET DEW _HEATER LM ON Enables the monitoring and automatic operation of the
dew heaters of LM21 (default). The dew heaters start to
warm up optical surfaces when ambient temperature
drops below a preset level.
SET HEADER string The Two-Character-Header can be configured (default:
LT)
SET HEAT_ON_BATTERY YES The heaters of the measurement units will be switched
on, when working on battery. (Only available when the
battery backup option is available).
SET HEAT_ON_BATTERY NO The heaters of the measurement units will be switched
off when working on battery. (Only available when the
battery backup option is available.)
SET HOOD_HEATERS LM OFF Disables LM21 hood heater operation and monitoring.
Set OFF when operated in environments where hood
heaters are not needed and the sensor is only operated
with DC power.
SET HOOD_HEATERS LM ON Enables the monitoring and automatic operation of the
LM21 hood heater (default). The hood heaters are turned
on by the unit when the hood temperature drops below a
preset level.