C L 1 U S E R S G U I D E
D O D T E C H N O L O G I E S , I N C
Rev 10.07
Page 41
Appendix H – Optic Block Cleaning Procedure
The CL1 may require periodic cleaning of the optics block when the instrument is used in
environments with a high level of airborne particulate or a “High Background” Fault has
been reported.
There are two methods for cleaning the optics. One is a basic cleaning using canned air
and the other is a more in-depth cleaning of the optics block that requires the optics block
back plate be removed.
In most cases the basic cleaning will be sufficient to clear an optics fault and return the
DAC to normal operating levels.
Basic Optics Cleaning
1)
Exit analysis mode and open the gate and remove the tape.
2)
Power down the CL1
3)
Use a canned air source to blow into the sample tube inlet as shown in the figure
1.
Figure 1
4)
Power on the CL1, enter the “Gate and Tape” mode and reinstall the tape.
5)
Exit the tape load screen and enter the “Service Mode”. Use password 1234 to
enter “Service Mode”.
6)
Enter “Optic Calib” mode
7)
The upper DAC value will be 255 if a “High Background Fault” has been
reported on the CL1.
8)
Press the “Start” key and the CL1 will recalibrate the optics. The DAC value
should go down to 140 or below. If it does not, you will need to perform the
Advanced Optics Cleaning”.
9)
If the DAC value is 140 or below, press “Done”, go to “Main Menu” and clear the
original “High Background” in the “Fault” screen.
10)
Exit the “Fault” screen and re-enter analysis.