Troubleshooting; Basic Troubleshooting - YOKOGAWA DpharpEJX vigilantplant EJX110 User Manual

Bolt
Process connector
Process connector gasket
Figure 8.5 Removing and Mounting the Process
Connector

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.
F0805.EPS
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.
Inspect the
process system.
Inspect receiver.
Environmental conditions
Check/correct
environmental conditions.
Figure 8.5.1 Basic Flow and Self-Diagnostics
8-6
: Areas where self-diagnostic offers support
Abnormalities appear in measurement.
YES
Is process variable
itself abnormal?
NO
Measurement system problem
Isolate problem in
measurement system.
YES
Does problem exist in
receiving instrument?
NO
Operating conditions
Check/correct operating
conditions.
8. MAINTENANCE
Transmitter itself
Check transmitter.
F0806.EPS
IM 01C25B01-01E