Toshiba GRT100 Series Instruction Manual page 132

 Press 3 (= Timer) on the "Test" sub-menu screen to display the "Timer" screen.
 Enter the number corresponding to the timer to be observed. The timers and assigned
numbers are listed in Appendix C.
 Press the END key to display the following screen.
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P r e s s E N T E R
P r e s s C A N C E
 Press the ENTER key to start measuring the time. The "TESTING" LED turns on, and
timer is initiated and the following display appears. The input and output signals of the
timer can be observed at monitoring jacks A and B respectively.
Check that the measured time is within  10ms of the setting time.
During the test, the following display appears on the LCD and the LEDs above the jacks
are also lit if the input or output signal exists.
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O p e r a t i n g . . . . . .
P r e s s E N D
P r e s s C A N C E
 Press the END key to reset the input signal to the timer. The "TESTING" LED turns off.
 Press the CANCEL key to test other timers. Repeat the above testing.
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