Make sure that you have the replacement spare part available.
If you have replaced the transmitter or receiver at some point, replacing the device control module includes adjusting the clean window reference and the calibration scalar.
Set the new clean window reference for a clean and dry window, in clear weather, and ideally with the termination hood placed on top of the device. The clean window calibration ensures that the window condition diagnostics respond appropriately to dirt accumulation.
CL61 is amplitude calibrated in manufacturing, which means that the attenuated backscatter (ABS) profiles it measures are in SI units of m−1*sr−1. This is important so that the ABS profiles from different CL61s are comparable.
Take a backup of the CL61 settings.
- Establish a maintenance connection to the device.
Type the following command:
- Copy and save the output in a text file.
Switch off AC (mains) power.
WARNING To make sure that there is no AC (mains) power available for the system, disconnect the AC (mains) cable (AC in).
- Open the measurement unit door.
From the device control module, disconnect the cables that are facing front, marked
1 ‑ 10 in the following figure.
Loosen the 2 screws, move the device control module away from the side panel, and pull
Disconnect the rest of the cables, marked 11 - 13 in Figure 1, from
the device control module.
- CLR RECEIVER 2
- LASER ON
- Attach the replacement device control module with the 2 screws and connect the cables.
- Connect the power.
- Type the activation code that was delivered with the device control module spare part.
If you have replaced the transmitter or receiver at some point, do the following:
- Adjust the laser reference.
- Set a new clean window reference.
- Adjust the calibration scalar.
See the instructions about replacing the transmitter module. Use the backup you created in 1.