WARNING The following procedure is a service procedure and not repair
maintenance. Contact Vaisala to replace the part.
3-mm Allen key
Make sure that you have the replacement spare part available.
In 2022, the AC (mains) power switch
(1P+1 circuit breaker) was replaced with an AC (mains) power switch (2P circuit
breaker).
Switch off both AC (mains) power switch and battery switch.
Make sure that there is no AC (mains)
power available for the system.
1
Battery switch
2
AC (mains) power switch
Remove the protection cap from the transmitter.
Remove the hood by opening the 3 screws that hold it in place and opening the connector
that connects the hood to the transmitter.
CAUTION Be careful when removing the hood to avoid damaging the
connectors.
1
Transmitter hood
2
Spring washer B4 DIN127 (3 pcs)
3
Screw M4×16 DIN912 (3 pcs)
4
Connector (transmitter)
5
Connector (hood)
6
Gasket
7
Optical path
Attach the connector between the replacement hood and the transmitter module.
Make sure that the parts of the connector
snap in place and you hear a click.
Attach the hood with 3 screws.
The transmitter and receiver hoods are not identical.
The transmitter window is transparent and the receiver windows are black. Check carefully
before replacing the hood.
CAUTION Make sure that the gasket is in the right place.
Make sure that no cables are in the optical path inside the transmitter.
Reattach the protection cap.
Power up the system.
Perform calibration adjustment (modeadjust) with the field calibrator kit (FDA701).