Yokogawa EJA110E Bedienungsanleitung PDF herunterladen (Seite 45)

<8. Maintenance>

8-6

IM 01C25B01-01E

8.4.4 Replacing the Process Connector

Gaskets

This subsection describes process connector

gasket replacement. (See gure 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 ow chart below to isolate

and remedy the problem. Since some problems

have complex causes, these ow charts may

not identify all. If you have difculty 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

F0806.ai

YES

Environmental conditions

Operating conditions

Transmitter itself

Figure 8.6 Basic Flow and Self-Diagnostics

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 84 85

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