Revision 1 152 9/10/2019
8.4 Commonly Observed Problems
Table 8-3 is a list of commonly observed problems that may be encountered during normal
operation and servicing of the analyzer
Table 8-3: Troubleshooting Guide
unplugged or loose
Check that DC voltage (Red & Black
wires) at bottom of Sensor block is
2. Sensor Calibration Alarm
Sensing tape is not installed.
Install sensing tape between sample
chamber and compression head.
Gas is running during the initial
start-up calibration
Perform sensor calibration on
unstained tape:
Tape is not installed over tape
counter roller or tape is broken.
Check that tape path runs over the
tape counter roller and is not broken
Tape roller movement is inhibited
Loosen set screw and move away from
plate.
4. Stain is not well defined
causing erratic readings.
Compression head not correctly
sealing.
Check the seal on the compression
head
Remove tape and reinstall tape
5. Stain is uneven (darker at
top or bottom) causing erratic
readings.
Compression head not seated
properly.
Loosen screws that hold compression
head to chassis. Adjust compression
head so that it will sit flush against
sample chamber and check seal)
readings are still erratic.
Stains have too much overlap
Increase Stain Width In Pulses value in
the Tape Box on the Global tab of the
GUI by 5 so that the stains are further
Back pressure on analyzer vent.
Check eductor for proper operation.
Frozen vent lines due to high
humidity in area.
Make sure vent slopes downward.
Sensor Current is too high. This
should be accompanied by a
Lint in sample chamber causing light
blockage. Clean the sample chamber.
7. Stains overlapping each
other.
Insufficient pulses per tape
advance to allow correct stain
spacing.
Increase Stain Width In Pulses value in
the Tape Box on the Global tab of the
GUI by 5 so that the stains are further
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