User's Guide _______________________________________________________________________
172 __________________________________________________________________ M211107EN-C
Cleaning RAINCAP
®
The Vaisala RAINCAP
Rain Detector should be cleaned every six
months or more often depending on the conditions.
NOTE
The measuring principle does not allow for proper ESD protection of the
RAINCAP
®
electronics, so you must follow the following instructions:
- Ground your hand first by touching grounded metallic parts of the
installation to remove excessive static charges from your body.
- Clean the RAINCAP
®
rain detector carefully with a soft, lint-free
cloth moistened with mild detergent. Be careful not to scratch the
surface.
- Check that the detector is free of ice and snow deposits.
FS11P Calibration
The FS11P sensor has been calibrated at the factory. Normally FS11P
needs no recalibration as long as the circuit boards are not replaced or
there are no warnings or alarms. The circuit boards need no hardware
calibration.
A calibration check should be made every year with the FSA11 and
PWA11 calibration kits. If the checks show less than +3% change, no
recalibration is recommended because the change is within the
repeatability range of the calibration procedure.
Recalibration is needed if any of the receiver modules or the transmitter
modules is replaced. In such a case both forward scatter and
contamination measurements need recalibration.
It is recommended to check the FSA11 Calibrator every three to five
years. This can be done, for example, by sending the Calibrator to
Vaisala factory service for a factory check.
FSM102 Visibility Calibration
When the visibility measurement is calibrated, the visibility should
ideally be better than 500 m, and there should be no precipitation. The
calibration is checked and adjusted with the FSA11 calibration kit. The
kit consists of zero plugs used to block the receiver and transmitter
optics, mask plates, and two opaque glass plates with known scatter
properties.
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