35Wattmeters
6. MAINTENANCE
Only use specified spare parts for maintenance purposes. The manufacturer cannot
accept any responsibility for accidents occurring following repairs carried out outside
its after-sales department or approved maintenance network.
6.1 Replacing the batteries
Disconnect the leads from the instrument
■ Press the OFF key
■ Unscrew the “quarter-turn screw” located at the top of the battery and fuse access hatch
(on the back of the instrument) and remove the hatch by pulling the stand.
■ Replace the 6 batteries located on either side of the opening with 6LR6-type 1.5 V
alkaline batteries, taking care to comply with the polarities indicated on the printed
circuit.
■ Reinstall the hatch and lock the quarter-turn screw.
6.2 Replacing the fuse
Disconnect the leads from the instrument
■ Press the OFF key
■ Proceed as indicated in § 6.1 for replacement of the batteries.
■ Replace the fuse with a 10 A fuse of the same type (10 A - 200 kA-600 V AC- 20 kA DC -
10 x 38).
■ Reinstall the hatch and lock the quarter-turn screw.
6.2 Storage
If the wattmeter is not used for a period of more than 60 days, remove the batteries and store
them separately.
6.3 Cleaning
Disconnect the leads from the instrument and press the OFF key
■ Clean the unit with a cloth slightly moistened with soapy water. Clean off with a damp
cloth. Then dry quickly with a cloth or pulsed air.
Chapter VI
北京海洋兴业科技股份有限公司（证券代码：839145）
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