Operation Manual

8-10

IM 1F5B2-01E

8.4 Troubleshooting

ULTRA YEWFLO, among other instruments, is less likely to malfunction if handled

and used correctly. Problems may arise, however, if any failure exists in its phases of

application such as mounting or piping. If ULTRA YEWFLO fails to operate normally,

take corrective measures while referring to the troubleshooting flows hereinafter de-

scribed. Some causes of failure may be too complex to localize by using only those

troubleshooting flows. If any given failure seems to be too difficult to cope with,

consult Yokogawa’s service personnel.

8.4.1 Basic Troubleshooting Flow

Output is indicated

but no fluid is flowing.

The reading

fluctuates.

No output is indicated

but the fluid is flowing.

The flowrate reading

is inconsistent.

The flowrate reading

fluctuates.

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