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. System degradation and recommended replacement cycle
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All Rights Reserved. Copyright © 2018, Yokogawa Electric Corporation
TI 34M06Z42-01E
2018.06-00
2.
System Degradation and
Recommended Replacement Cycle
2.1
Aged deterioration of system
■
The failure rate of a system can be taken as the total failure
rates of its component parts. It has been shown empirically
that the deterioration of component parts is greatly affected by
installation environmental conditions as described below:
●
Temperature: Failure rate doubles when temperature is 10°C higher
●
Humidity: Corrosion of contacts accelerate when humidity exceeds
60%
●
Corrosive gas: Causes corrosion of contacts
●
Dust: Causes short circuit failures and corrosion
Figure 2.1. Aged deterioration of systems (Bathtub curve)
