16
Electrical Systems
When we close the switch, current flows in the
circuit. We will then read a voltage drop (pressure
difference) across our load. There must be current
flowing in the circuit to measure the voltage
difference across the load.
Understanding voltage drop testing and when to
perform a voltage drop test.
When you encounter poor performance from an
electrical component. A test of the circuit may
indicate that the amperage flow is lower than
required to operate the system. The area of
excessive resistance must be located and repaired.
Performing a voltage drop test will help locate the
area of excessive resistance.
Testing for voltage drop
Connect the voltmeter red lead (+) to the power (or
“most” positive) side of the component, circuit or
connection to be tested.
Connect the voltmeter black lead (-) to the ground
(or “least” positive) side of the component, circuit or
connection to be tested.
Set the meter scale to exceed the expected test
voltage. (Auto-range on digital voltmeters).
Turn “on” the circuit, (remember, current must be
flowing through the circuit for resistance to be
found) and read the voltage.
Toro University Technical Training
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro 09170SL |
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| Language | English |
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