CYCLIC SHORT
TERM DRIFT
Temperature Out of
Control
Cell Vent Backpressure
Strip Chart Recorder
The baseline is experiencing a
cyclic short term drift indicated by
detector signal or graphics display.
“Dirty” Carrier
Defective Flow
Controller
CONTINUOUS
UPWARD OR
DOWNWARD DRIFT
Incorrect Temperatures
Column Flooded
Sample Valve Leak
The baseline is slowly drifting upward or
downward as indicated by the detector
signal or graphics display.
Sample Contamination
Electrical Noise
Noisy Power
Supply
Faulty FPD
Amplifier
Loose
Connections
Faulty
Coaxial Cable
Replace Power
Supply
Replace FPD
Amplifier Assembly
Tighten cable
connections
Gas/Fuel Contamination
BASELINE
CONTINUOUS
NOISE
Contaminated
Regulator
Contaminated
Carrier
Contaminated
Makeup Gas
Baseline or detector noise can result from
contaminated carrier, makeup gas, tubing,
or regulators.
Contaminated
Tubing
Replace
Coaxial Cable
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