Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 266)

Caution
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Section 7-4
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.
Point Inspected Inspection Details Criterion Inspection Instrument
Power supply voltage Fluctuation in power supply
terminal voltage Permissible voltage fluctuation
range
(24 VDC --15% +10%) Tester
Ambient environmental
conditions Ambient temperature
(temperature in the operation
panel) 0 to 50 C Thermometer
Ambient humidity
(humidity in the operation
panel) 35% to 85%RH Hygrometer
Presence/absence of dust Dust must not be settled Visual inspection
Mounting conditions Looseness of mounting
brackets etc. To be no looseness Accessory tools
Connector connections of
connecting cable To be fully inserted and locked,
with no looseness
Looseness of screws in
external wiring To be no looseness Philips screwdriver
Conditions of external
connecting cables Faults such as incipient
disconnections. Visual inspection
Components with limited
lives Brightness of the backlight Must be sufficiently bright.
Backlight life:
Brightness is halved after
about 20,000 hours in use.
Visual inspection
Brightness of EL display unit Must be sufficiently bright.
EL display unit life:
Brightness is reduced by 30%
after about 30,000 hours in
use.
Visual inspection
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.
Cautions on replacing the NT600S
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.