Agilent Technologies 1100 Series Manual de servicio descargar pdf (Pagina 93)

1100 Series DAD and MWD Reference Manual 93

Troubleshooting and Test Functions 3

Filter Test

The filter test checks the correct operation of the filter assembly. When the

test is started, the holmium oxide filter is moved into position. During filter

movement, the absorbance signal is monitored. As the edge of the filter passes

through the light path, an absorbance maximum is seen. Once the filter is in

position, the absorbance maximum (of holmium oxide) is determined. Finally,

the filter is moved out of the light path. During movement, an additional

absorbance maximum is expected as the edge of the filter passes through the

light path. The test passes successfully, if the two maxima resulting from the

edge of the filter assembly (during filter movement) are seen, and the

absorbance maximum of holmium oxide is within the limits.

Filter Test Evaluation

Test Failed

Probable Causes

• Filter assembly (lever and filter) not installed.

• Defective filter motor.

Suggested Actions

✔ Install the filter assembly.

✔ Exchange the filter motor.

Holmium Oxide Maximum out of Limits

Probable Causes

• Holmium oxide filter not installed.

• Dirty or contaminated filter.

Suggested Actions

✔ Install the holmium oxide filter.

✔ Exchange the holmium oxide filter.

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Agilent Technologies 1100 Series Manual de servicio Pagina 93