An adequate inspection and maintenance program will greatly reduce the possibility of rectifier failure. Rectifier failures do occur, however, and the field technician must know how to find and repair troubles quickly to reduce rectifier down time.rnEquipment required for trouble shooting need not be elaborate, but must be adequate to do the job. A multimeter, such as the Simpson 260 or Triplett 630, is relatively inexpensive and is valuable for reading AC and DC voltages and DC current up to 10 amperes. This meter may also be used to measure resistance and to determine whether short circuits or open circuits exist, (other than ground bed resistance). A millivoltmeter may be used for checking rectifier DC current by measuring the millivolt drop across the shunt on the rectifier panel. In addition to necessary small tools, every technician's kit should include a heavy shorting cable and several jumper cables about three feet long with booted alligator clips.
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