Yokogawa ADMAG AXR Uživatelský manuál stáhnout pdf (Strana 142)

<11. MAINTENANCE>

11-2

IM 01E30D01-01EN

11.2 Components Replacement

WARNING

• Component replacement must be carried out

by the trained personnel having knowledge

of safety standard. No operator shall be

permitted to perform any operations relating

to component replacement.

• Component replacement and the associated

operations must be carried out by expert

engineer or skilled personnel and not by

operators.

• Before opening the cover, it is important to

ensure that at least 5 minutes have passed

since the power was turned off. Furthermore,

opening of the cover must also be carried out

by expert engineer or skilled personnel.

IMPORTANT

• Asarule,maintenanceofthisowmeter

should be implemented in a maintenance

service shop where the necessary tools are

provided.

• Theamplierassemblycontainssensitive

parts that may be damaged by static

electricity.

Excercise care so as not to directly touch

the electronic parts or circuit patterns on

the board, for example, by preventing static

electricationbyusinggroundedwrist

straps when handing the assembly. Also

take precautions such as placing a removed

amplierassemblyintoabagwithan

antistatic coating.

11.2.1 Display Unit Replacement

CAUTION

When using this instrument for a long time in

conditions of high temperature and humidity, the

visibility of the display unit may deteriorate. In

this case, it is necessary to replace the display

unit.

(1) Removing the Cover

(1) Turn off the power.

(2) The cover has the locking screws in front and

behind it as shown in Figure 11.2.1 in case of

explosion proof type. This is used for the cover-

locking system. Loosen cover locking screws

clockwise using a hexagonal wrench (nominal

size 3) to unlock the cover. (Upon shipment

from the manufacturing plant, the cover is

locked.)



Holdtheowmeterwithyourhandandremove

the cover by turning it in the direction of the

arrow as shown below (both explosion proof

and general purpose types).

F1103.ai

Cover locking

screws

Front

side

(1) (2)

Explosion proof type Both Explosion proof and

General purpose types

Figure 11.2.1 Removing the Display Cover

(2) Removing the Dispaly Unit

(1) Hold the display unit with your hand and loosen

the four mounting screws. Remove the display

unit by pulling it in a straight, taking care not to

damage it (refer to Figure 11.2.2).

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