Deactivation Of The Buzzer; Alarm Thresholds (C.a 6523 And C.a 6525); Programming Of The Alarm Thresholds; Activation/Deactivation Of The Alarm Thresholds - Chauvin Arnoux C.A 6521 Notice De Fonctionnement

4.4.2. Deactivation of the buzzer

■ C.A 6521 : set the switch to continuity measurement (20 Ω +
or 20 Ω -) and then press the yellow key. The buzzer is then
deactivated and the symbol is no longer displayed. To reac-
tivate the buzzer, press the yellow key again or switch the
instrument off and then back on again.
■ C.A 6523 and C.A 6525 : Press the ALARM button when
switching on the device via the rotating switch. The symbol
disappears from the screen.
To reactivate the buzzer, turn off the device and switch on
again.

4.5. Alarm thresholds (C.A 6523 and C.A 6525)

Each position of the switch corresponds to a high or low alarm
threshold value. In the 20 Ω + and 20 Ω - position, the thresholds
are identical and hence either one can be programmed in for
these two positions. The thresholds can be either low or high.
They can also be activated or inactivated and will be stored in
memory even after the device 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 :
> 0.25 MΩ for the MΩ - 250 V position
> 0.50 MΩ for the MΩ -500 V position
> 1.00 MΩ for the MΩ -1000 V position
< 10.00 kΩ for the 400 kΩ position
< 2.00 Ω for the 20 Ω + and 20 Ω - positions
At this moment, it is possible to program the threshold using the
(see § 2.3.3) and keys (see § 2.3.4). During this programming,
the instrument continue measuring.
You can quit the programming mode and record the threshold
by another long press on the ALARM key.
If the switch is activated before the second long press on
ALARM, the programming is not recorded.
If the programmed threshold is too high, it is corrected when
it is stored in the memory : the maximum value is entered. For
example, for continuity measurement, a 30.00 Ω threshold will
be stored as 20.00 Ω (max. value for continuity).
If the threshold has been "wrongly" programmed, it is corrected
when it is stored in the memory : For example, 002 MΩ will
become 2.00 MΩ.

4.5.2. Activation/deactivation of the alarm thresholds

The threshold corresponding to the switch position can be
activated by a short press on the ALARM key.
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