Installation, Operation and Service Manual LKP Series
© 2020 DynAmp, LLC Page 13
041736 N
You cannot get good ohmmeter readings if the Measuring Head is on a live bus. The
coils pick up induced voltages from any rectifier ripple. The Hall plate resistance
changes in a high magnetic field.
Notes on Measuring Head Resistance Charts - Table 4.1 & 4.2 below:
1. BUS CURRENT MUST BE ZERO OR MEASURING HEAD REMOVED FROM BUS
when taking resistance measurements.
2. Use a high impedance DMM set on the lowest range appropriate for the measurement.
Measurements are made between cable leads listed, at Metering Unit end of Cable.
The resistance values shown in the table are for readings obtained with cable
disconnected from the Metering Unit. Split channels 1 and 4 (5 in LKP-80) will read half
the resistance values when measured with all the cables connected to the Metering
Unit.
3. These resistance readings are the room temperature values of the copper channel
coils. Measured values can be 50% higher if Measuring Head is hot and/or cable
length is longer than 30 feet.
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