Omron NS7 Series Setup Manual page 188

7-2 Inspection and Cleaning
• Inspection Items
Inspect the PT for the following items to check whether the PT is operating within the speci-
fied criteria. If the PT is outside the criteria, use measures such as improving the operating
environment to conform to the standards, or tightening screws.
Inspection
items
Power
supply
Ambient
environment
Mounting
conditions
Parts with
limited
service life
• Do not disassemble, repair, or modify the PT.
Note
• Follow all local government regulations, where applicable, when disposing of the Unit and
7-6
Inspection details
Power terminal voltage fluc-
tuation
Ambient temperature (tem-
perature in control panel)
Ambient humidity (tempera-
ture in control panel)
Presence of dust
Presence of oil
Looseness of fixed mounting
bracket
Connection status of Con-
necting Cable Connectors
Looseness of external wiring
screws
Status of external connecting
cables
Backlight brightness
Battery
used batteries.
Criteria
Allowable voltage range
(24 VDC ±15%)
0 to 50°C (Refer to Appendix 2.) Thermometer
35% to 85% (Refer to Appendix
2.)
No dust accumulated.
No oil between front panel sheet
and molding.
Specified torque.
Fully inserted, locked, and with
No looseness.
No looseness.
No breaks or other damage
Sufficient brightness.
Backlight life (at room tempera-
ture of 25°C) is 50,000 hours, as
a guideline.
5 years (at room temperature of
25°C).
Inspection means
Tester
Temperature meter
Visual inspection
Visual inspection
Phillips screwdriver
Phillips screwdriver
Phillips screwdriver
Visual inspection,
tester
Visual inspection
Replace every 5
years