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General Considerations in Installing and Maintaining Electronic
Installing Maintaining and Servicing Electronic Relays
Inspection Schedule Electronic Relays and Elec tronic Timing Relays
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adjustment ammeter anode transformer anode voltage arcback armature cable calibration capacitor cathode cathode-ray oscilloscope cent CHART Check circuit breakers clean coil connected contactor control circuit control panel coolant corrosion current flows d-c voltage defective devices direct current electrical electrolytic electronic circuit electronic control Electronic Timing Relays elementary diagram equipment failure faulty tube firing circuit firing tubes fuses grid circuit half-cycle ignitor ignitron tubes indicated inspection installation instrument insulation leads light source line voltage load located magnetic maintenance measure mounted multimeter negative ohmmeter ohms open circuit operation oscillograph pass current peak phase photoelectric relay phototube positive potential potentiometer power circuit power tubes Replace resistance resistor rheostat saturable reactor sealed-ignitron rectifier seam-welding control shown in Fig socket sodium chromate synchronous temperature terminal thyratron tubes Trouble Cause Remedy tube socket usually valve voltage drop voltmeter volts welder welding control welding machine wiring diagram