Troubleshooting Serinus 51 User manual 1.0
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temperature. Verify that the cell
temperature is 50° ±3° C and that the TE
cooler is 10° ±2° C.
Low span Leaks A leak dilutes the sample stream and
causes low span readings and noise.
Span calibration out
Adjust the span using the calibration
procedure
Faulty lamp Replace UV Lamp
No response to
span gas
Leaks/blockages Leak or blockages in tubes or valves.
Perform leak check and flow check and
repair any leaks/blockages.
Faulty calibration
source
Ensure calibration gas is plumbed
correctly, is not contaminated and is a
NATA/NIST reference gas.
Zero drift No flow Check sampler flow
Charcoal saturated Replace the charcoal.
Faulty zero air Ensure zero air source is not overly
polluted
Unstable flow or
pressure readings
Faulty pressure
sensors
Replace main PCB
7.1 Zero Flow
Table 4 Zero flow Troubleshoot
Pump failed Replace the internal or external pump.
Blocked filter or orifice Replace sintered filter and orifice
Pressurized Rx cell
Ensure Sample and Zero inlets are
maintained at ambient pressure.
Flow control assembly Recalibrate the flow control assembly.
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