Installation, Operation and Service Manual
LKP Series
© 2016 DynAmp, LLC
Page 15
041738 I
5.6 COMPLETING THE HEAD INSTALLATION
With the head temporarily installed and bus current off (or the head removed from the bus
for verification prior to installation), complete the following steps.
A.) Connect the interconnecting cable directly to the Measuring Head. Note that the
connectors are keyed and can only be connected one way. For instructions on
reversing the cable exit direction for the top cable, refer to the end of this section.
B.) Before connecting the other end of the interconnecting cable to the Metering Unit,
perform the ohmmeter tests in table 5.1. The tests are made from the open end of the
cable (the Metering Unit side). Record these values for future reference.
NOTE
You cannot get good ohmmeter readings if the 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 Table 5.1 below:
1.) BUS CURRENT MUST BE ZERO when taking resistance measurement (or head
removed form bus).
2.) Use 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 6 will read half the
Figure 5.3 Proper Lifting Technique.
