Deactivation Of Automatic Shutdown Function; (C.a 6523 And C.a 6525); Power Supply Autotest; Buzzer - Chauvin Arnoux C.A 6521 Notice De Fonctionnement

4.2.1. Deactivation of automatic shutdown function

(C.A 6523 and C.A 6525)

Press the button when switching on the device via the rotating
switch. The symbol is displayed, indicating that the automatic
P
shutdown function has been deactivated.
To reactivate the automatic shutdown function, switch the
instrument off (turn the switch to OFF) and then switch it back
on again.

4.3. Power supply autotest

The power supply voltage is measured automatically once every
second. The voltage range ensuring correct operation is between
7 V and 10 V. Depending on the result of the autotest, there are
four possible cases :
■ The voltage is correct :
The symbol is not displayed on the screen.
■ The remaining charge life is close to the limit for correct.
(< 7.1 V) : the symbol flashes.
■ Accurate measurement can no longer be guaranteed, change
the batteries (V ≤ 6.9 V) : the
continuously.
■ The voltage is close to interrupting operation of the clock
(< 6.7 V) : the digital display indicates BAT and then, after
5 seconds, the shutdown buzzer sounds and the automatic
shutdown function is activated. The instrument shuts down.

4.4. Buzzer

4.4.1. The different audible signals

When the symbol is displayed, the buzzer is active. It gives
out different audible signals, depending on the situation.
■ Short buzz (65 ms at 2 kHz) in the following cases :
- press on a key,
- automatic shutdown,
- lead compensation taken into account,
- and after 30 s, 1 min and 10 min of insulation measurement
in TIMER mode (C.A 6525).
■ Continuous buzz (at 2 kHz) in the following cases :
- when the measurement is lower than the minimum
threshold,
- when the measurement is higher than the maximum
threshold.
■ Short, higher buzz (65 ms at 4 kHz) in the following case
when a deactivated key is pressed (except the yellow key).
■ Repeated high buzzes (at 4 kHz)in the following case :
if the voltage measured is greater than 25 V and the user is
pressing the yellow key.
symbol remains lit
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