Lesson 3/Learning Event 4
Test Button
This push-button switch has two functions:
Press and Release - causes selected test measurement to begin.
Press and Hold - initiates an offset test.
Test Select Switches
Two 10-position switches. Used to select the test to be performed by the VTM when the TEST
button is pressed and released.
Push On/Pull Off Switch
Used to control power to the VTM from the power source. Switch contains a 4-ampere circuit
breaker to protect VTM internal circuitry.
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