Operation Troubleshooting; Baseline Noise; Baseline Or Signal Offset - ABB PGC5000 Series Service Instructions Manual

PGC5000
PGC5000 Series Service Instructions
INDICATOR ISSUE
Vol Flow High Volumetric Flow exceeds
High Limit
Vol Flow High High Volumetric Flow exceeds
High High Limit
Pressure Low Low Pressure lower than Low
Low Limit
Pressure Low Pressure lower than Low
Limit
Pressure High Pressure exceeds High Limit
Pressure High High Pressure exceeds High
High High Limit
Temp Low Low Temperature lower than
Low Low Limit
Temp Low Temperature lower than
Low Limit
Temp High Temperature exceeds High
Limit
Temp High High Temperature exceeds High
High High Limit
Loop DP Low Low Loop Differential Pressure
lower than Low Low Limit
Loop DP Low Loop Differential Pressure
lower than Low Limit
Loop DP High Loop Differential Pressure
exceeds High Limit
Loop DP High High Loop Differential Pressure
exceeds High High Limit
"#" is used in place of numbers to eliminate repeats in multiple card and oven systems. "Information
Only" signifies the set indicator is activated in response to the setup criteria. It does not necessarily
identify a fault.

5.6 Operation troubleshooting

This subsection provides troubleshooting information by category. Included in this information are symptoms, causes, and
suggestions for further fault isolation.

5.6.1 Baseline noise

The baseline (detector signal) with no sample injection appears as noise similar in appearance to "grass" on a two dimensional
drawing in the graphics display. The baseline is observed on the Manual Mode tab of the Master Controller.
Cause: Baseline or detector noise can result from contaminated carrier, makeup gas, tubing or regulators. This type of
contamination is much less pronounced with a TCD than for an FID. Other causes include defective filaments (TCD), detector
wiring, or electrical noise in the detector electronics or power supplies.
Check the background level by going to the Setup Tab>FID button and with the flame lit manually, AUTO ZERO the baseline.
(The AUTO ZERO OFFSET for an FID should be > 10 mv.)

5.6.2 Baseline or signal offset

The baseline (detector signal) is continually offset to the positive or the negative with no short term drift up or down scale.
Causes:
1. Incorrect temperatures. Inspect temperature settings and correct if necessary.
SI/PGC5000-EN, Rev B
RESOLUTION (CHECK & CORRECT)
Information Only.
Information Only.
Information Only.
Information Ony.
Information Only.
Information Only.
Information Only.
Information Only.
Information Only.
Information Only.
Information Only.
Information Only.
Information Only.
Information Only.
5 Diagnostics and troubleshooting
RESET SOURCE
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FstLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
AOC FastLoop
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