RING-RET-CLA 3843851 - Caterpillar

Personal injury or death can result from high voltage.When power generation equipment must be in operation to make tests and/or adjustments, high voltage and current are present.Improper test equipment can fail and present a high voltage shock hazard to its user.Make sure the testing equipment is designed for and correctly operated for high voltage and current tests being made.
Table 1
TOOLS NEEDED    
Part Number     Tool     Quantity    
6V-7070     Digital multimeter
Used to measure voltage, resistance, or current up to 10 A. Rectifiers can be checked by using the diode function. Refer toSpecial Instruction, SEHS7734.     1    
9U-7330     Digital multimeter (optional)
Used to measure voltage, current, frequency, duty cycle, and capacitance.     1    
225-8266     AC/DC clamp-on ammeter.
Used to measure current up to 1200 A. When you measure the line current on multiple lead units, measure the current in each conductor per phase and add the currents together.     1    
142-5055     Insulation Tester (megohmmeter)
Used to measure the insulation resistance of the main armature, main field, exciter armature, and exciter field.     1    
-     A Milliohmmeter (Wheatstone Bridge)
Used to measure the winding resistance of the main armature and the exciter field.     1