Appro LC-7451 Provozní pokyny stáhnout pdf (Strana 116)

UltiMate 3000 Series:

VWD-3100 and VWD-3400RS Variable Wavelength Detectors

Page 108 Operating Instructions

Intensity Test failed

In the test result, ### is replaced by "measurement channel" or "reference channel". Also

note the shape of the intensity spectrum, as absorbing substances in the flow cell may

cause local intensity drops. Measurement and reference intensity spectra must be

qualitatively identical.

Test Result Remedial Action

UV (VIS) low range spectral

intensity failed (###)

UV peak range spectral intensity

failed (###)

UV mid range spectral intensity

failed (###)

UV (VIS) high range spectral

intensity failed (###)

If the test results refers to the measurement channel

1. Verify that the flow cell is correctly installed and reinstall the flow

cell if necessary (→ page 126).

2. Check the optical path of the flow cell, making sure that it is

neither contaminated or obstructed nor damaged in any other way.

3. Install the dummy flow cell (→ page 126) and repeat the test. If

the test is successful, install a different flow cell.

4. Install a new lamp (→ page 119).

If the test results refers to the reference channel

Install a new lamp (→ page 119).

Second Order Filter Test failed

In the test result, ### is replaced by "measurement channel" or "reference channel".

Test Result Remedial Action

Dark current in ### too high 1. Verify that the flow cell is correctly installed

(→ page 126) and that the connections are tightened

sufficiently. Reinstall the flow cell if necessary.

2. There may be too much stray light. Verify that the flow

cell is installed correctly and completely (→ page 126).

Darken the room if necessary.

3. Turn the detector off, wait for 30 seconds, and then turn

it on again by pressing the power switch on the rear of

the detector.

SO1 (SO2) filter malfunction:

insufficient attenuation

—or—

SO1 (SO2) filter malfunction:

bad transmission

1. In Chromeleon, perform the Reset command.

2. Turn the detector off, wait for 30 seconds, and then turn

it on again by pressing the power switch on the rear of

the detector.

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