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Maintenance and Inspection
n Inspection Items
Item
Supply voltage fluctuation
Environment
(1) Ambient temperature
(2) Ambient humidity
(3) Vibration and shock
(4) Dust
(5) Corrosive gas
Panel condition
(1) Ventilation
(2) Packing for any
enclosed construction
I/O power supply
(1) Voltage fluctuation
(2) Ripple
Mounting condition
6-6
Detail
(1) Check that the supply voltage
fluctuation at the power supply
terminal block is within the
permissible range.
(2) Check that there is no frequent
instantaneous power failures
or radical voltage drops.
(1) and (2) Check that the
ambient temperature
and humidity are
within the specified
ranges.
(3) Check that no vibration or
shock is transmitted from any
machines.
(4) Check that the system is free
of dust accumulation.
(5) Check that no metal part of the
system is discolored or
corroded.
(1) Check that the system is
ventilated properly with natural
ventilation, forced ventilation,
or cooling air.
(2) Check that the packing is
properly attached with no
damage.
Check on the I/O terminal block
that the voltage fluctuation and
ripple are within the permissible
ranges.
Check that each device is securely
mounted.
Check that each connector is
securely connected.
Check that no screw of the terminal
block is loosened.
Check that no wire is broken or
nearly broken.
Check that the distance between
the Tag and Antenna is within the
specified range.
Check that the GR terminal is
grounded.
Criteria
Supply voltage rating
Within permissible voltage fluctuation
range
(1), (2) and (3)
Check that the ambient temperature
and humidity are within the specified
ranges.
(4) Check there is no dust.
(5) Check there is no corrosive gas.
(1) The interior temperature must be
within a range between -10°C
and 55°C with proper ventilation.
(2) The packing has no damage.
The voltage fluctuation and ripple
must be within the permissible
ranges.
There must be no loose screws.
Each connector is locked or securely
tightened with screws
There must be no loose screws.
There must be no wire that is broken
or nearly broken.
The distance between the Tag and
Antenna must be within the specified
range.
The terminal must be grounded to a
resistance of 100 W or less.
Section 6-4
Remarks
Voltage
tester
Power supply
analyzer
Maximum
and minimum
thermometer
Hygrometer
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Voltage
tester
Oscilloscope
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