Agilent Technologies 1220 Infinity II LC User Manual

1220 Infinity II LC System User Manual 167
Test Functions and Calibration
9
Variable Wavelength Detector (VWD)
Filter/Grating Motor Test
VWD Filter/Grating Test Description
The actual position of the filter motor and grating motor is defined as the
number of steps from the reference (sensor) positions. The VWD Filter/Grating
Test counts the number of motor steps required to move the filter motor and
grating motor back to the reference (sensor) position. If the number of steps
required to reach the reference positions are the same as the expected step
number, the test is passed. If a motor fails to move, or loses motor steps, the
test fails. The test evaluates the results automatically.
VWD Filter/Grating Test Results
Probable causes of test failure:
Table 40 Probable causes of test failure
Cause Corrective action
Lamp off. Switch on the lamp.
Old lamp. Exchange the lamp.
Absorbing solvent or air bubble in flow cell. Ensure the flow cell is filled with water, and
free from air bubbles.
Dirty or contaminated flow cell. Run theCell Test. If the test fails, exchange the
flow cell windows (“VWD Cell Test
Description” on page 162).
Table 41 Filter Motor Test
Cause Corrective action
Defective filter motor assembly. Exchange the filter motor assembly.
Defective VWM board. Exchange the VWM board.
Table 42 Grating Motor Test
Cause Corrective action
Defective filter motor assembly. Exchange the filter motor assembly.
Defective VWM board. Exchange the VWM board.

Agilent Technologies 1220 Infinity II LC Specifications

General

Brand	Agilent Technologies
Model	1220 Infinity II LC
Category	Laboratory Equipment
Language	English