Vaisala FD12P - Manual (Page 85)

Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 85
If the LM11 is not connected, the scaling factor should be negative.
Value -1.0 has been set at the factory as the default value. If a positive
value is used, the sensor expects a signal from the LM11.
For an example, see the following:
>blsc
BL SCALE
-1.000
>blsc 10.4
BL SCALE 10.400
If a day/night switch is connected to the serial line control input on the
FDP12 processor board, the FD12P can read the switch state and
report it as a background luminance value of 1 (day) or 0 (night). The
FD12P firmware will read the switch if the background luminance
scaling factor is set to 0.
Maintenance Commands
The maintenance commands are listed in Table 21 below.
Table 21 Maintenance Commands
Command Description
STA Displays status.
CAL
Calibrator_frequency Calibration.
TCAL Temperature measurement calibration.
CLEAN Sets clean references.
CHEC Displays average signal.
FREQ Displays internal signals.
DRY ON Sets DRD12 dry offset.
WET ON Sets DRD wet scale.
AN CHANNEL Analog channel (0,1,3,8 ... 15 or ANALOG ID).
STA Command
The STA command displays the results from the built-in test system
as a status message. Message 3 gives the same status message as the
STA command.
When you type
STA
↵ ↵↵ ↵
the system output is the following: