10
RMO30T Getting Started
Testing of a Delta-delta winding resistance is usually a very time consuming procedure. This is because
the two windings resemble two closed loop inductors. When energy is brought into the inductors, this
energy (in the form of D.C. current) continually circulates within each winding. A method to quickly test
this configuration requires that both the high side and low side are connected in series with the Winding
Ohmmeter. By having these two windings in opposing polarity, the internal circulating currents settle very
quickly to obtain a balance, and discharge with the same speed. Even if only one side of the transformer
needs to be tested, connecting both high and low windings in series will speed up the test considerably.
On/Off
Connect the earth/ground lead first before doing any connections to the test object.
Connect the mains lead to a mains outlet 100V - 240V AC and turn on RMO30T with the power
switch on the back of the test set. The first shown on the display is the name of the product followed
by the instrument model type and the internal firmware version.
Figure 6-2:
Connecting a test
object to RMO30T
Figure 6-3:
Connecting a test
object to RMO30T
