Sierra RedyCompact Meter, Instruction Manual, Page: 54 / 73

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6.
Troubleshooting
In the following table we have compiled fault symptoms, their possible causes and suitable
measures you can take. If you do not recognize your fault symptom, or the proposed measures
were not successful, please consult your sales partner.
If you are planning to return a product, please refer to the chapter
5.11 Returns .
If you have to remove the measuring or control device from the pipeline, please observe any
flushing procedures and the relevant safety guidelines. You will find a guide on how to remove and
clean the devices in the chapter
“Operation and Maintenance.”
Error Possible causes Measures
Output indicates high flow
continuously Flow is too high
(Overflow)
Reduce the flow rate. If necessary, the full scale
can be extended. Please consult your sales
partner
Device is heavily contaminated Please consult your sales partner
Sensor faulty Please consult your sales partner
Flow is shown despite
zero flow. Sensor contaminated Please consult your sales partner
The device is being operated with a
different gas from its calibration. For multi-gas instruments, you can set the
appropriate gas type
Offset due to mounting position Particularly with small measurement ranges,
heavy gases and gauge pressures > 5 bar, a
zero-point offset can occur where the mounting
position is vertical >> chimney effect. Where
possible, mount the device horizontally
The manual valve is
leaking Contaminated valve Flush the valve repeatedly with clean dry
nitrogen
Meter does not indicate
the expected value. Leakage Flow rate > than reference:
Leakage between measuring device and your
reference
Flow rate < than reference:
Leakage upstream of the measuring instrument
Contamination With contamination by sealing tape, for example,
it is possible that the flow divider is partially
blocked. In this case the device displays more
than the reference. Please consult your sales
partner
The device is being operated with a
different gas than calibrated. Connect the intended gas, or change the type of
gas in the 'Calibration' menu
Different reference conditions
Verify “Normal” or “Standard” conditions
Inlet pressure is too low Check your inlet and outlet pressures
Pressure drop too high Check for blockage or polution. Check fittings ID