4 • Troubleshooting
Doc. 065378-01 1/12
67
b. Select
UV
, and then select
LampIntensity
. The intensity reading
should be above 10 million counts for a standard or semi-
preparative cell
or
above 3 million counts for a semi-micro cell.
If the reading is acceptable, resume normal operation. If the
reading is too low, see
.
3. If the error message appears again, there may be a faulty connection to the
filter wheel sensor. Contact Thermo Fisher Scientific for assistance.
NOTE The Dionex PDA electronics cannot be serviced by
users. All repairs of the electronics components
must be performed by Thermo Fisher Scientific
personnel.
To troubleshoot:
This message appears if you enter a rise time setting that is invalid for a data
collection rate of 20 Hz. Select a valid rise time.
To troubleshoot:
This message appears if you enter an invalid step setting. Chromeleon 7 or
Chromeleon 6.8 automatically selects the step value that is the inverse of the
data collection rate (see
“Step (Chromeleon 6.8 only)” on page 52
). In future,
accept the value selected by the software.
Invalid rise time. Valid rise times at 20 Hz: 0.05, 0.1, 0.2, 0.5,
1.0, and 2.0.
Invalid step for the 3DFIELD. Valid steps are 0.05, 0.1, 0.2, 0.4,
0.5, 1, 2, and 4.
Only advanced users should override the step setting selected by
Chromeleon. Selecting an inappropriate step setting may cause loss
of sensitivity, skipped data points, and other problems.
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