Omron NT-series Operation Manual page 266

%     
Point Inspected
Power supply voltage
Ambient environmental
conditions
Mounting conditions
Components with limited
lives
Caution
Cautions on replacing the NT600S

Points inspected
Inspect the following points to determine if there is any divergence from the
stated criteria. If there is, either improve the surrounding environment so that the
values fall within the stated range, or adjust the NT600S.
Inspection Details
Fluctuation in power supply
terminal voltage
Ambient temperature
(temperature in the operation
panel)
Ambient humidity
(humidity in the operation
panel)
Presence/absence of dust
Looseness of mounting
brackets etc.
Connector connections of
connecting cable
Looseness of screws in
external wiring
Conditions of external
connecting cables
Brightness of the backlight
Brightness of EL display unit

Do not disassemble for repairs or modification. Otherwise, the product may
malfunction.

The disposal of the NT600S (and used backlights) may be regulated by national
or local authorities. Dispose of them in accordance with the laws and regula-
tions of the relevant country and local authority.
When replacing the NT600S after discovering a fault during inspections, note the
following points:

Be sure to switch the power OFF before replacement.

After replacement, check that the new NT600S is not subject to the same error.

If a faulty unit is returned for repairs, write as detailed a description of the fault as
possible and send this description together with the unit to the OMRON address
indicated on the back cover of this book.
Criterion
Permissible voltage fluctuation
range
(24 VDC --15% +10%)
0 to 50  C
35% to 85%RH
Dust must not be settled
To be no looseness
To be fully inserted and locked,
with no looseness
To be no looseness
Faults such as incipient
disconnections.
Must be sufficiently bright.
Backlight life:
Brightness is halved after
about 20,000 hours in use.
Must be sufficiently bright.
EL display unit life:
Brightness is reduced by 30%
after about 30,000 hours in
use.
Section 7-4
Inspection Instrument
Tester
Thermometer
Hygrometer
Visual inspection
Accessory tools
Philips screwdriver
Visual inspection
Visual inspection
Visual inspection