Seaward Supernova Elite - Manual (Page 89)

Cleaning the Tester
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Chapter 5 Maintaining the Tester
Cleaning the Tester
The Tester case can be cleaned with a damp cloth, with if necessary,
a small amount of mild detergent. Prevent excessive moisture
around the socket panel or in the lead storage area.
Do not allow liquid inside the Tester, or near the sockets panel. Do
not use abrasives, solvents, or alcohol.
If any liquid is spilt into the Tester case, the Tester should be returned
for repair, stating the cause of the defect.
Cleaning the Tester