Detector Bridge Balance - Emerson Daniel Danalyzer 1000 Hardware Reference Manual

SEP 2005
5.5.6

Detector Bridge Balance

The following procedure should be carried out if the Analyzer does not produce a chromatogram.
To perform a detector bridge balance, follow these steps:
(1) Halt any ongoing analyses. If you are using the MON2000 software program, select the
"Control" submenu from the Main Menu screen. Then, from the "Control" submenu, press
"H" to Halt. MON2000 will ask you if you want to Halt the Analysis. Select "Yes," and
press the ENTER key.
(2) Open the door of the upper purged enclosure on the Analyzer.
(3) Refer to Figure 5-4, and attach the negative lead of a digital voltmeter to the black test point
( BRIDGE BALANCE). Attach the positive lead of the digital voltmeter to the red test
point (+BRIDGE BALANCE).
(4) Check the detector bridge voltage. The voltage should read 0 millivolts (mV) ±0.5mV.
Adjust the coarse and fine potentiometers immediately beneath the test points to obtain the
specified reading.
5-26
Figure 5-4. Analyzer Detector Bridge Balance Locations
MODEL 1000
MAINTENANCE