Replacing Parts With A Limited Service Life - YOKOGAWA UM330 User Manual

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4.2.4

Replacing Parts with a Limited Service Life

The following UM350/UM330 parts have a limited service life.
The service life given in the table assume that the controller is used under normal operating
conditions.
Aluminum electrolytic condenser
EEPROM
Alarm 4 output relays
<4. Troubleshooting and Maintenance>
Part
About 10 years (rated)
About 100,000 times of writings
About 100,000 more ON-OFF operations or with resistance load
Service life
IM 05F01D02-41E 1st Edition : May 31,2000-00
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