Appendix F
Inspections
Carry out regular inspections to ensure the Ethernet Unit is functioning perfectly.
Items
Most of the parts that make up an Ethernet Unit are semiconductor components. None of the parts in the Unit will wear out after a specific lifetime, but some parts may deteriorate due to extreme operating condition. Therefore, it is important to inspect the Unit regularly.
Inspection Interval
Normally inspect once or twice per year. Choose the inspection period according to the severity of the operat- ing conditions.
Inspection Items
Correct any of the items in the table below not conforming to the specified standard.
Item | Details | Standard |
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Environment | Temperature around Unit | 0 to 55°C |
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| Humidity around Unit | 10% to 90% (with no condensation) |
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| Accumulated dust | No accumulated dust |
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Mounting | Ethernet Unit firmly attached | No looseness |
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| Transceiver cable connector fully pushed in | No looseness |
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| Condition of transceiver cable | No visible abnormality |
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| No looseness | |
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| Condition of | No visible abnormality |
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Tools Required for Inspection
The following tools are needed to inspect the Ethernet Unit:
Standard Tools
•
•Tester or digital voltmeter
•Industrial alcohol and a clean cloth
Tools Required Under Special Circumstances
•Synchroscope
•Pen oscilloscope
•Thermometer and hygrometer
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