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<8. Maintenance>
8-5
IM 01C25C01-01E
8
.4.3 Replacing the Process Connector
Gasket
This subsection describes the procedure for
replacing the process connector gasket. (See
Figure 8.4)
1) Loosen the two bolts and remove the process
connector.
2) Replace the process connector gasket.
3) Mount the process connector. Tighten the bolts
securely and uniformly to a torque of 39 to 49
N·m {4 to 5 kgf·m}, and verify that there are no
pressure leaks.
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Process connector gasket
Process connector
Bolt
Figure 8.4
Replacing the Process Connector
Gasket
8.5 Troubleshooting
If any abnormality appears in the measured values,
use the troubleshooting flow chart below to isolate
and remedy the problem. Since some problems
have complex causes, these flow charts may
not identify all. If you have difficulty isolating or
correcting a problem, contact Yokogawa service
personnel.
8.5.1 Basic Troubleshooting
First determine whether the process variable
is actually abnormal or a problem exists in the
measurement system.
If the problem is in the measurement system,
isolate the problem and decide what corrective
action to take.
This transmitter is equipped with a self-diagnostic
function which will be useful in troubleshooting,
and the transmitter equipped with an integral
indicator will show an alarm code as a result of self-
diagnosis.
See subsection 8.5.3 for the list of alarms.
See also each communication manual.
Abnormalities appear in measurement.
: Areas where self-diagnostic offers support
Is process variable
itself abnormal?
Inspect the
process system.
Isolate problem in
measurement system.
Does problem exist in
receiving instrument?
Check/correct
environmental conditions.
Inspect receiver.
Check transmitter.
Check/correct operating
conditions.
Measurement system problem
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YES
NO
NO
YES
Environmental conditions
Operating conditions
Transmitter itself
Figure 8.5 Basic Flow and Self-Diagnostics