Ametek Battery Charger 880H3-12E

Diode disconnected from electrical circuitry

Resistance value with ohmmeter lead on threaded end of diode and other ohmmeter lead on diode lead

Resistance value with reversed ohmmeter leads on diode

Diode considered good if one resistance reading is infinitely (or very) high and the other is extremely low

Warning: Ensure the charger is disconnected from power before cleaning

Is the charger unit clean and dry?

Is the charger unit well ventilated?

Enter the air pressure used for cleaning

Select the cleaning method used

Sign off on the battery charger cleaning

All electrical connections checked and tightened

No broken wiring or damaged insulation found

All charger cabinet panels replaced after servicing

Sign off on the battery charger inspection

WARNING: Follow the Silicon Diode Testing section before proceeding

Disconnect capacitor and connect leads of ohmmeter (set to highest scale) to capacitor terminals

If capacitor is good, pointer will deflect, indicating capacitor is being charged, followed by a deflection in the opposite direction indicating partial discharge

If there is no deflection, capacitor is “open” and must be replaced. Also, if meter needle moves and stops at one value, replace capacitor

Replacement capacitors must be ordered from factory. When ordering, supply serial number of charger and microfarad (MFD) or (μF) value printed on capacitor

Sign off on the capacitor testing