Bench Testing
- Install alternator and regulator on test bench equipped with gradual speed control. Connect ammeter, voltmeter, and rheostat as shown in illustration. Regulator must be placed vertically, with terminals "15" and "67" at base. Regulator must be checked without removing cover.CAUTION: DO NOT operate regulator with switch "I" open (battery disconnected) since this will damage regulator contacts.
- Operate voltage regulator in an ambient temperature of 122 ± 5.4°F for 30 minutes to stabilize. Start with rheostat fully inserted, then adjust current output to one sixth of maximum alternator output. Alternator should be operated slowly at first, then be gradually brought up to 5000 RPM.
- Ensure that suitable thermostatic equipment is available to maintain regulator at specified temperature. Operate alternator at 5000 RPM and adjust rheostat to specified current output.
- Check first stage immediately after second stage and ensure that conditions specified in step 2) are met. At 5000 RPM, adjust rheostat until specifications are met for 1st stage testing. Regulated voltage should be 0-.5 volts less than recorded for 2nd stage.NOTE: When testing the 1st and 2nd stages, check that regulated voltage is stable without any sudden surges or drops.