Yokogawa GD40 Gas Density Detector - Manual (Page 171)

<11. INSPECTION AND MAINTENANCE>
11-2
IM 11T3E1-01E
11.1.4 Replacing the Fuse
(1) For safety reasons, stop the power supply to the converter by switching the external break-
er.
(2) Remove the fuse from the fuse holder. Turn the holder cap counterclockwise by 90 degrees
using a flat-blade screwdriver that fits the holder cap. Then, pull out the fuse together with
the cap.
(3) Check that the rating of the new fuse is correct, and put it in the fuse cap; insert the cap (and
fuse) in the holder; then while pressing down, turn the cap clockwise by 90 degrees using
the flat-blade screwdriver.
(4) If the new fuse breaks too soon, the circuit may be abnormal. Contact Yokogawa in such a
case.
Fuse Holder
Fuse Holder
General purpose type
Explosion-proof type F1101.ai
Figure 11.1 Position of the Fuse Holder
11.1.5 Cleaning
Use a dry, clean, soft cloth when cleaning for inspection or maintenance. You can use a neutral
detergent on the transparent window of the non-explosion-protected converter (weathering-re-
sistant PVC sheet), when extremely dirty. But do not use any organic solvent.
If the device is so dirty and/or badly scratched that it affects key operation or reduces visibility,
replace the case cover (part No.: K9313DW).