Filter Test - Agilent Technologies 1100 Series Reference Manual

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
• Filter assembly (lever and filter) not installed.
• Defective filter motor.
✔
Exchange the filter motor.
Holmium Oxide Maximum out of Limits
• Holmium oxide filter not installed.
• Dirty or contaminated filter.
✔
✔
1100 Series DAD and MWD Reference Manual
Probable Causes
Suggested Actions
Install the filter assembly.
Probable Causes
Suggested Actions
Install the holmium oxide filter.
Exchange the holmium oxide filter.
Troubleshooting and Test Functions
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