Vaisala FS11 - Replacing FS11 Modules

Chapter 6 _______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 139
Calibration procedure finished.
Calibration: FAILED.
Zero test: fail (3.7829, limit:
absolute +/-0.0001)
Signal test: none
Remove calibrator assembly and type
YES: YES
1>
Guided Calibration
Procedure failed due to Zero
Signal Test failure. Zero
Value is measured to 3.78.
Limit is ±0.0001.
Scatter Signal Test was
skipped.
Replacing FS11 Modules
This section describes in detail how to remove and replace the Visibility
Sensor Controller FSC102, transmitter module FST102, and receiver
module FSR102. Removing the units comes into question when there is
reason to suspect that a malfunction of FS11 is caused by faults in the
optical units or the rain detector.
CAUTION
The servicing of the equipment must be performed by qualified
personnel only.
CAUTION
The
AC (mains) power switch and the optional battery backup switch
must always be turned off before attempting any service actions
described in this section.
NOTE
When replacing any assembly, do not let water or moisture enter the
unit.