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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 antifreeze 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 control Electronic Timing Relays elementary diagram equipment failure faulty tube firing circuit firing tubes fuses grid circuit half-cycle ignitor ignitor misfire ignitron tubes indicated initiating 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 photoelectric relay phototube positive potential potentiometer power circuit power tubes Replace resistance resistor rheostat saturable reactor sealed-ignitron rectifier seam-welding control short circuit shown in Fig socket sodium chromate supply synchronous temperature terminal thyratron tubes tube socket usually valve voltage drop voltmeter volts welder welding control welding machine wiring diagram