Is the key lock set?
Have measures against
external noise been taken?
See No. 4 of the checklist.
See No. 2, 3, 7, 9, and 10 of the
checklist in section 2.2.
Release the key lock setting.
Keys do not operate correctly
If there is a problem with a display
screen or other function
NO
YES
YES
NO
• Keep measurement input,
communication, and other
wires and cables away from
noise sources.
• Be sure to ground all
instruments.
• Use shielded cables for
wiring measurement input,
communication, and other
circuits.
• Use isolation transformers
on power supply lines.
• Insert filters on power supply
lines.
• If inductive loads are used
on alarm lines, insert surge
absorbers in the lines.
If menu items required for screen menus or function menus are not displayed, check menu
customization settings.
Is the memory medium
(CF card) working normally?
Is it a recommended
device?
See No. 8 of the checklist
in section 2.2.
Replace the memory medium
(CF card) with a new one.
Malfunction of external medium
(CF card)
YES
NO
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