User Manual

IM 01E20C02-01E
10-1
10. MAINTENANCE
10. MAINTENANCE
10.1 Maintenance
WARNING
• Maintenance work must be carried out by the
trained personnel having knowledge of safety
standard and not by operators.
• When opening the cover, wait for more than 10
minutes after turning off the power. Further-
more, opening of the cover must also be
carried out by the trained personnel having
knowledge of safety standard.
CAUTION
• Explosion protected type must be, as a rule,
removed to a non-hazardous area for mainte-
nance and be disassembled and reassembled
to the original state.
• The display cover is locked by the special
screw. In case of opening the display cover,
use the hexagonal wrench attached.
• Be sure to lock the cover by the special screw
using the hexagonal wrench attached after
installing the cover.
IMPORTANT
• As a rule, maintenance of this flowmeter should
be implemented in a maintenance service shop
where the necessary tools are provided.
• The amplifier 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 electrification
by using grounded wrist straps when handing
the assembly.
10.1.1 Fuse Replacement
CAUTION
Please contact Yokogawa's service office for
fuse replacement. Also be sure to use the fuse
that was supplied by Yokogawa’s sales or
service offices.
10.1.2 Changing the Direction of the
Display Unit
10.1.2.1 Removing the Cover
(1) Turn off the power.
(2) Loosen cover locking screw 1 clockwise using a
hexagonal wrench (nominal size 3) to unlock the
cover. (Upon shipment from the manufacturing
plant, the cover is locked.) Hold the flowmeter
with your hand and remove the cover by turning it
in the direction of the arrow as shown below.
F1002.EPS
Cover locking
screws
Figure 10.1.1 Removing the Display Cover