YOKOGAWA EXAxt ZR22G, Руководство пользователя, Страница: 180 / 211

<11. Inspection and Maintenance>
11-9
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
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 satisfies 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
11.3 Replacing Flowmeter in ZR40H Automatic
Calibration Unit
(1) Remove piping and wiring, and remove the ZR40H from the 2B pipe or wall mounting.
(2) Remove four M6 bolts between brackets.
(3) Remove piping extension