Baker D30R, User'S Manual & Operating Instructions

Page: 37 / 142

D30R Users Manual
37
Do Not Touch Test Leads while test is in Progress!
71-023 Rev C 5/8/2007
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.
Saving & Recalling Measurements
1. After test is run, select store. The following screen appears.
Fig 3-3: Saving & Recalling Screen