Coil Resistance Testing
12/3/2009 | 71-022 V6
D30R
22
3)
Set the function knob to the Res 1-2 position.
4)
Press the run test button to start the test.
5)
The tester will begin measuring the coil’s resistance using an auto-ranging algorithm
described below. The test results will be displayed on the screen.
6)
When the measurement for leads 1-2 are complete, move the resistance test leads to
leads 2- 3 on the motor.
7)
Set the function knob to Res 2-3.
8)
Again, press the run test button to start the resistance test.
9)
Once again, the tester will make an auto-ranging measurement of the coil’s resistance.
The result will be displayed on the tester’s screen.
10)
When the test is complete, connect the Resistance Test leads to leads 3 and 1 of the
motor.
11)
Set the Function Knob to Res 3-1.
12)
Again, press the Run Test button to begin another resistance test.
13)
Once again, the Baker tester will make another auto-ranging resistance measurement
and the result will be displayed on the tester’s screen.
At the end of the test, press the Store button to save the resistance measurements
to the Baker’s internal memory.
Auto ranging Resistance measurement algorithm
The Baker tester performs an auto-ranging resistance measurement by injecting a low
current (20-50mA) into the coil and measuring the voltage drop across the coil. If the Baker
tester does not detect a voltage drop, the current will be increased to approximately 0.2 amps
and the voltage drop measured again. If a sufficient voltage is still not developed across the
coil, the current will be raised to 2 amps. Once the voltage is detected, the measured voltage
will be used to calculate the coil’s resistance using Ohm’s law. If the Baker tester is still unable
to detect a voltage drop after injecting the maximum current, the Baker will increase the gain
in the voltage measurement circuit until a voltage is detected. If voltage drop still cannot be
detected, the tester will indicate 0.000 ohms on the display.
Summary of Contents for D30R
Page 6: ...Table of Contents 12 3 2009 71 022 V6 D30R 6...
Page 12: ...Safety precautions CE compliance 12 3 2009 71 022 V6 D30R 12...
Page 24: ...Coil Resistance Testing 12 3 2009 71 022 V6 D30R 24...
Page 28: ...Principles of High Voltage DC Testing 12 3 2009 71 022 V6 D30R 28...
Page 38: ...High Voltage DC Testing 12 3 2009 71 022 V6 D30R 38...
Page 50: ...Surge Testing 12 3 2009 71 022 V6 D30R 50...
Page 70: ...Data Recording Retrieving 12 3 2009 71 022 V6 D30R 70...