4 replacing the process connector gaskets, 5 troubleshooting, 1 basic troubleshooting – Yokogawa EJA110E User Manual

Page 45: Replacing the process connector gaskets -6, Troubleshooting -6 8.5.1, Basic troubleshooting -6

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<8. Maintenance>

8-6

IM 01C25B01-01E

8.4.4 Replacing the Process Connector

Gaskets

This subsection describes process connector

gasket replacement. (See figure 8.5.)
(a) Loosen the two bolts, and remove the process

connectors.

(b) Replace the process connector gaskets.

bolts securely and uniformly to a torque shown

below, and verify that there are no pressure

leaks.

Model

EJ110

EJ120

EJ130

EJ310

EJ430

EJ440

C capsule

D capsule

Torque(N·m)

{kgf·m}

39 to 49

{4 to 5}

49 to 59

{5 to 6}

F0805.ai

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.
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.