Chauvin Arnoux C.A 6531 Manual De Instrucciones página 33

Short, higher buzz (65 ms at 4 kHz) when an inactive key is
pressed.
Series of short, high buzzes (4 kHz) if the voltage measured
is greater than 25 V and the user is pressing the yellow key.
4.4.2 Deactivation of the buzzer
Press the ALARM button when switching on the device with the
rotating switch.
The symbol is no longer displayed.
To reactivate the buzzer, switch the instrument off and then back
on again.
4.5 Alarm thresholds
Thresholds can only programmed for insulation and resistance
measurement.
The thresholds can be upper or lower thresholds. They can be
active or inactive and will be stored in the memory even after
the instrument has been switched off.
4.5.1 Programming of the alarm thresholds
You can select the threshold programming mode by a long press
on the ALARM key. The ALARM symbol is displayed and the
value of the threshold corresponding to the switch position is
indicated on the digital threshold display.
If no value was programmed previously, the display indicates
a default threshold:
On the C.A 6531
> 0.050 MΩ for the MΩ - 50 V position
> 0.100 MΩ for the MΩ - 100 V position
< 10.00 kΩ for the 40 kΩ position
On the C.A 6533
> 0.05 MΩ for the MΩ - 50 V position
> 0.10 MΩ for the MΩ - 100 V position
> 0.25 MΩ for the MΩ - 250 V position
> 0.50 MΩ for the MΩ - 500 V position
< 10.00 kΩ for the 400 kΩ position
At this moment, it is possible to program the threshold using the
(see § 2.3.3) and
During this programming, if you change the switch position,
you lose what you have just done.
You can quit the programming mode and record the threshold
by another long press on the ALARM key.
If the programmed threshold is too high, it is corrected when
it is stored in the memory: the maximum value is entered.
For example, a 2 GΩ insulation threshold will be stored in the
memory as 399.9 MΩ on the C.A 6531, while for resistance
measurement 700 kΩ will become 399.9 kΩ on the C.A 6533.
keys (see § 2.3.4).
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