Omron NB Series Operation Manual page 464

Checking Items
Installation state
Object with expected life
Precautions for Safe Use
• Water and oil resistance will be lost if the front sheet is torn or is peeling off. Do not use the
Unit, if the front sheet is torn or is peeling off.
• Dispose of the Units and batteries according to local ordinances as they apply.
• Periodically check the installation conditions in applications where the PT is subject to contact
with oil or water.
• The rubber packing will deteriorate, shrink, or harden depending on the operating environment.
Inspect and replace the rubber packing periodically.
NB-Series Programmable Terminals NB-Designer Operation Manual(V106)
5 Maintenance and Abnormality Handling
Checking Contents
Looseness of fixing metal
pieces etc.
Connection state of
connector for the cable
Looseness of screw for
external wiring
State of external
connection cable
Backlight brightness
Battery
Criterion
Specified torque
Inserted fully and without
looseness.
Without looseness
Without abnormality such
as disconnection etc.
With enough brightness
Backlight life: approx.
50,000 hours (Typ) at
room temperature (25 °C)
with 40% brightness.
5 years (at 25 °C)
Checking Method
Phillips screwdrivers
Phillips screwdrivers
Phillips screwdrivers
Visual check + multimeter
Visual check
Replace it every 5 years
once.
5-5
5