6-3
IM WT310-02EN
Troubleshooting, Maintenance, and Inspection
6.3 Recommended Part Replacement
YOKOGAWA guarantees the WT310/WT310HC/WT330 for the period and under the conditions of
the product warranty. The warranty does not cover the following expendable items. The replacement
period for expendable items varies depending on the conditions of use. Refer to the table below as a
general guideline. Contact your nearest YOKOGAWA dealer to have parts replaced.
Part Name Recommended Replacement Interval
Current input relay
(only for the WT310)
A relay for switching the current input circuit. The relay’s specifications indicated below.
• Electrical life: Approximately 50,000 operations (at the rated capacity)
• Mechanical life: Approximately 1,000,000 operations
Backup battery
(lithium)
3 years
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