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2.4.2.2 Testing
It is advisable to make a preliminary test on the test object, starting at zero voltage, in order to
test the load impedance, before performing the test with output control set at higher values.
Therefore, ensure the output control knob is fully anti-clockwise before switching on.
Ensure the timer mode switch is in the off position, and depress the on push-button. Increase
the current by rotating the output control knob in a clockwise direction until the desired current
is indicated on the ammeter. Press the output off push-button.
Connect the test object contacts to the contact terminals on the test set, select the internal
start timer mode. If the test object has no auxiliary contacts (e.g. thermal breakers), it will be
necessary to use the current operated timer mode.
When the output “on” pushbutton is pressed, the following will occur:
a.
The timer will start and current will flow through the test object.
b.
When the test object's contacts change state the timer will stop and the test current
will be automatically switched off.
2.4.2.3 After Testing
On completion of the test, return the output control to zero and switch off the supply. Before
disconnecting the test object ensure the mains supply switch is in the OFF position.
