T&R KV mk2 Series, Operating And Maintenance Manual

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1.7 Test timer (-T suffix units only)
The test timer fitted to
–T units may be pre-set with a test time in hours, minutes and seconds.
The timer counts down when the output is switched on and an alarm sounds when the timer
reaches zero.
Fig. 1.5 Test timer
1.7.1 Setting the Test Time
Set the test time using the six central triangular buttons on the front of the timer. Each button
sets one digit of the timer. The timer displays the time in the format hh:mm:ss in hours,
minutes and seconds. When the test time has been set, press the Reset button on the timer
twice to set the current test time to the pre-set time.
1.7.2 Starting the Timer
The timer automatically starts when the HV output is switched on. The timer counts down from
the pre-set value to zero.
1.7.3 Resetting the Timer
The timer is automatically reset to zero when the HV output is switched off.
1.7.4 Cancelling the Alarm
The alarm is cancelled by pressing the CANCEL ALARM button or switching off the output. If
the alarm is cancelled while the output is still switched on the time is reset to the pre-set value
and the timer will start counting down again.
1.7.5 Disabling the Timer
It is not possible to disable the timer, but if you do not wish to use the test timer, set the test
time to a large value (e.g. 10 hours). The timer will still run, but will not affect the test.
Test time
Pre-set time
Reset
Hours Minutes Seconds
Timer running
Set
hours
Set
minutes
Set
seconds