Dionex PDA Operator’s Manual
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Doc. 065378-01 1/12
f. Reinstall the cell in the optical bench.
g. Autozero the detector again to verify that the problem has been
resolved. If the error message appears again, contact Thermo
Fisher Scientific for assistance.
If the lamp intensity reading is below 10 million counts for a standard or
semi-preparative cell
or
below 3 million counts for a semi-micro cell,
follow these steps:
a. Check that the flange of the deuterium lamp is aligned with the
two locating pins in the optical bench (see
). If the
flange is aligned, the lamp is defective and should be replaced
(see
b. If the error message appears again, contact Thermo Fisher
Scientific for assistance.
•
Filter paddle has malfunctioned
Check the Chromeleon Audit Trail. If the “Filter wheel sensor could not
detect blocked position.” or “Filter wheel sensor could not detect open
position.” message is displayed, see
for instructions.
•
Failure of an electronics component
Turn off the Dionex PDA power and contact Thermo Fisher Scientific for
assistance.
NOTE Do not attempt to service the Dionex PDA electronics
components. All repairs of the electronics components
must be performed by Thermo Fisher Scientific
personnel.
4.8
Wavelength Calibration Fails
•
Deuterium lamp may be defective
If the
DEUTERIUM – UV
LED is flashing rapidly—or if the LED fails to light—
replace the deuterium lamp (see
If the
DEUTERIUM – UV
LED is lighted but is not flashing, open the Dionex
PDA Wellness panel and run the wavelength calibration and the wavelength
verification test (see
). If the Dionex PDA fails these
procedures, remove the flow cell from the detector and repeat both
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