Serinus 40 User Manual 2.2
Faulty heater or
temperature sensor
Reaction cell temp failure
Faulty heater or
temperature sensor
1. Check that the instrument is not overheating.
2. Possibly a faulty power supply.
3. Corrupted firmware. Perform ‘erase all settings’ in
the Bootloader Menu and reload or upgrade
firmware.
12 Voltage supply failure
1. Verify that the line cord is connected.
2. Check that the power supply fuse is not open. The
fuse should be 5A (115 V) or 3A (230 V).
3. Verify that the voltage switch is in the proper
position.
Adjust the display contrast by pressing two keys on
the front panel:
- Press up arrow () for darker contrast
- Press down arrow () for lighter contrast
Verify that the power supply is providing ± 12V +5V
DC.
Check the interface cable between the display and
the microprocessor board.
Bad display or
microprocessor PCA
1. Replace the front panel display.
2. Replace the microprocessor board.
3. A bad cable is unlikely, but if you suspect it,
perform a pin-for-pin continuity test using an
ohmmeter.
Sample pressure
too high or too low
Loss of pressure
calibration
Too high - Re-calibrate pressure sensors.
Too low – Check calibration and sample flow.
Sample flow not at 0.6
SLPM
Check/replace sintered filter.
Check/replace sample filter.
Check pump.
Check valves.
Re-calibrate pressure sensors.
Unstable flow or pressure
readings
Check pressure transducer calibration. If unable to
diagnose problem then it may be a noisy A/D
converter, replace main PCB.
A leak in the analyser or calibration system dilutes
the sample stream and causes low span readings and
noise.
Adjust the span using the calibration procedure.
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