Yokogawa Integral Oxygen Analyzer ZR202 Manuel d'utilisateur télécharger pdf (Page 169)

<11. Inspection and Maintenance>

11-9

IM 11M12A01-02E

To replace the fuse, follow these steps:

(1) Turn off the power to the converter for safe replacement.

(2) Remove the fuse from its holder. With the appropriate at-blade screwdriver that just ts the

holder cap slot (Figure 11.6), turn the fuse holder cap 90° counterclockwise.

By doing so, you can remove the fuse together with the cap.

Cap

Flat-blade

screwdriver

Fuse

Socket

F11.6E.ai

Figure 11.6 Removing the Fuse

(3) Check the rating of the fuse and that it satises the following:

Maximum rated voltage: 250 V

Maximum rated current: 3.15 A

Type: Time-lag fuse

Standards: UL-, CSA- or VDE-approved

Part number: A1113EF

Place a new, properly rated fuse in the holder together with the cap, and push and turn the

cap clockwise 90° with the screwdriver to complete installation of the fuse.

11.2.2 Cleaning

Use a soft dry cloth to clean any part of the converter during inspection and maintenance.

11.2.3 Adjust LCD screen contrast

An LCD is built in the ZR402G converter. The contrast of this LCD is affected by its ambient

temperature. For this reason, the LCD is shipped, after adjusting the contrast so as to become

the most suitable in a room temperature(20-30 °C). However, when display on the LCD is hard

to see, adjust the LCD contrast by change the resistance of the variable resistor; its position is

shown in Fig. 11.7

Variable register

Figure 11.7

8th Edition : Jan.13,2012-00

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Yokogawa Integral Oxygen Analyzer ZR202 Manuel d'utilisateur Page 169