Vaisala LM21 - OPERATION; Operating the LM21 with FS11

Chapter 4 ___________________________________________________Operation
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CHAPTER 4
OPERATION
This chapter contains information that is needed to operate
LM21 when it is installed to an FS11 Visibility Sensor
system.
LM21 Background Luminance Sensor is a fully automatic
instrument that does not need any regular operation by the
user. The factory set instrument parameters do not usually
need to be changed.
Operation with FS11
When installed into an FS11 system, the configuration
command SET BL_SENSOR LM21 is used to add the
LM21 sensor output into the FS11 system and the data
messages. With this command, the interface unit CPU starts
automatically polling the LM21 sensor via the internal RS-
485 sensor interface. All the most important LM21 system
parameters can be set and the maintenance commands given
via FS11 Interface Unit (see FS11 User's Guide).