14 MiniFlex ® Flexible AC Current ProbeCHAPTER 5MAINTENANCE5.1 MaintenanceWarning• For maintenance use only specified replacement parts.• To avoid electrical shock, do not attempt to perform any servicingunless you are qualified to do so.• To avoid electrical shock and/or damage to the instrument, do notget water or other foreign agents into the case.• Turn the instrument OFF and disconnect the unit from all the cir-cuits before opening the case.5.1.1 Battery ReplacementThe battery must be replaced when the green indicator flashes or remainsoff when the instrument is switched on.• Disconnect everything connected to the instrument and set theswitch to OFF.• Use a screwdriver to unscrew the two screws on the housing.• Replace the old battery with a new one (9V alkaline or lithium bat-tery of type 6LF22).• Close the housing, making sure that it is completely and correctlyclosed, then screw both screws back in.5.1.2 Cleaning• It is important to keep the sensor latch mating surfaces clean toprevent foreign matter from entering the closing.• The sensor may be gently cleaned with a soft cloth, soap andwater. Dry immediately after cleaning. Avoid water penetrationinto the electronic module.• Make sure the sensor, electronic module, and all leads are com-pletely dry before any further use.