Replacing device control module - CL61

CL61 User Guide
Document code
M212475EN
Revision
E
Language
English
Product
CL61
Document type
User guide
  • Crosshead screwdriver

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.

  1. Take a backup of the CL61 settings.
    1. Establish a maintenance connection to the device.
    2. Type the following command: 
      get
    3. Copy and save the output in a text file.
  2. 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).
    1
    AC (mains) power switch
    2
    AC (mains) power cable connector AC in
  3. Open the measurement unit door.
  4. From the device control module, disconnect the cables that are facing front, marked 1 ‑ 10 in the following figure.
    Figure 1. Device control module cables
    1
    CLL: Laser power monitor cable
    2
    CLR COAXIAL: Receiver coaxial cable
    3
    MOTOR 1: Servo drive module cable (polarization unit)
    4
    MAINTENANCE LINE: Maintenance Ethernet cable
    5
    DATA LINE: Data Ethernet cable
    6
    SURGE GND: Surge protection cable
    7
    SIGNALS: Control signal cable
    8
    POWER IN: DC power cable
    9
    CLT TRANSMITTER: Transmitter module cable
    10
    CLR RECEIVER 1: Receiver module main cable
    11
    CLR RECEIVER 2: Receiver module memory cable
    12
    CLO: Optics unit cable
    13
    LASER ON: Window LED cable
  5. Loosen the 2 screws, move the device control module away from the side panel, and pull it out.
  6. Disconnect the rest of the cables, marked 11 - 13 in Figure 1, from the device control module.
    • CLR RECEIVER 2
    • CLO
    • LASER ON
  7. Attach the replacement device control module with the 2 screws and connect the cables.
  8. Connect the power.
  9. Type the activation code that was delivered with the device control module spare part.
  10. If you have replaced the transmitter or receiver at some point, do the following:
    1. Adjust the laser reference.
    2. Set a new clean window reference.
    3. Adjust the calibration scalar.

    See the instructions about replacing the transmitter module. Use the backup you created in 1.