Azbil MCB10A, User Manual

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Azbil Corporation Maintenance and troubleshooting
Model MCB10A 6-5
6-2-3 : Trouble during operation
Troubleshooting
If trouble occurs during operation, maintain in the following procedure.
1.
Search for the symptom of the trouble in the table on this page. If found,
maintain according to the table.
2. If communication is possible, read the error message and self-diagnosis results.
Maintain referring to “Error messages and troubleshooting”.
3. If the above steps cannot solve the trouble, the instrument may have broken
down. Contact the nearest our customer service offices.
Trouble Check point and troubleshooting
The output value
fluctuates with a much
larger amplitude than the
expected variation range of
flow rate.
• Check that the instrument is grounded correctly.
• Check that the damping time constant is set
correctly.
• Clean the electrodes.
The output value exceeds
100%.
• Check that the range is set correctly.
• Check that zero is adjusted correctly.
The output value stays at
0%.
• Check that the signal line is connected correctly.
• Check the upstream and downstream valves.
• Check that the range is set correctly.
• Isn't the instrument in the constant current mode?
• Check that the flow rate is not within the set range
of low-flow cutoff.
• Check that the flow rate is not reversed (negative
flow rate).
• Check the detector for unfilled condition, too low
conductivity, excessive noise, or the like.
The output is burnt out. • Take measures referring to “Error messages and
measures”.
The pulse output is too
large or too small for the
flow rate.
• Is the pulse setting (weight and width) correct?
• Is the output from the main unit correct?
• Is a pulse counter of appropriate specifications
used?
• Is the dropout value correctly set between 0 and
10%.