YOKOGAWA PH8TBG, User Manual

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<3. Inspection and Maintenance>
3-1
IM 12B07W01-01E 3rd Edition : Nov. 28, 2018-00
3. Inspection and Maintenance
Normally, it is sufficient to inspect the PH8TBG terminal box during periodic system repairs (once
a year or every two years), as far as it works without Fail. Daily inspection and maintenance are
not required.
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Terminal Box Inspection
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Checking for Moisture and Performing the Required Maintenance
Remove the cover of the terminal box and check for moisture. If the inside is very damp, use a
hair drier to dry the inside of the box. If you have a spare desiccative, replace the desiccative
(approx. 30 g of silica gel).
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Checking for Corrosion and Performing the Required Maintenance
Check that corrosive gas has not entered the terminal box and corroded the terminals and
conductors. If the corrosion is excessive and problems such as poor contact and disconnection
seem likely, replace the corroded parts. When crimping terminal lugs of the core wires are
replaced, make sure not to lose the connection number label (mark band).