Chauvin Arnoux C.A 6549 Mode D'emploi page 57

To validate the mode selected, press the MODE key again.
The various measurement modes are as follows :
§
MANUAL STOP :
This is the conventional quantitative insulation
measurement mode :
The measurement is started by pressing START /
STOP and stopped by pressing START / STOP
again.
The user determines the duration, which is indicated
by the measurement duration chronometer.
§
MANUAL STOP + DD :
The measurement is started by pressing START/
STOP and stopped by pressing START/STOP again.
1 minute after the end of the measurement, the
instrument calculates and display the DD term. The
time remaining during this minute is displayed.
§
TIMED RUN
(TIMED RUN TEST)
This mode is used to perform a measurement for a
duration defined in advance, with a predetermined
number of measurement samples : the
measurement is started by pressing START / STOP
and stops automatically after the time programmed
by the user.
This duration (Duration) and the time interval
between samples (Sample) must be specified when
the Timed Run mode is selected.
When the measurement is started, the chronometer counts down the time remaining. When this time
(Remaining Time) is zero, the measurement is stopped.
During the execution of a timed run test, the intermediate samples are automatically stored: they are used
to plot insulation resistance vs. time. This curve can be displayed after the measurement by pressing
GRAPH, as long as no new measurement has been started.
The samples and the curve are automatically stored with the final value of the resistance, if it is stored.
During the measurement, if the position of the rotary switch is changed, or the STOP key is pressed,
the measurement is stopped.
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