Lesson 3/Learning Event 2
The next two terminals are used to connect a fixed resistor to a circuit. The resistor is located in
the LVCT and is rated at 0.25 ( ohm) of resistance. It is used to test some types of voltage
The next two terminals are marked FIELD RHEOSTAT. These terminals are used to connect the
adjustable resistor to a circuit. The field rheostat is used to change the strength of the
electromagnet in generators, thereby changing the generator output. It can also be used to add a
varied amount of resistance in other electrical circuits, if desired.
The last two connections or terminals are marked VOLTMETER. One terminal is marked positive,
and the other is marked negative. These terminals are the connections for the voltmeter and are
located right beside it. The 16-gage color-coded test leads (red/black) are used with these voltmeter
terminals. The voltage range selector between the two meters connects the terminals to the proper
range on the voltmeter.
The off-on switch between the two meters is used to turn the load bank on and off. It is always
left in the OFF position except when the load bank is in use.
As you can see, it is easy to use the LVCT for simple tests. During this lesson, we discussed only
one type of LVCT to help you learn what the tester is and what it is used for. Each LVCT has an
instruction booklet. If you have any questions on how to use the tester, always refer to the