Triggering Of The Alarm; Compensation Of Measuring Leads; (C.a 6523 And C.a 6525) - Chauvin Arnoux C.A 6521 Notice De Fonctionnement

The ALARM symbol, the < or > symbol, the programmed value
of the threshold and the corresponding unit are then displayed
on the digital threshold display.
The threshold can be deactivated by a second short press on
the key. The ALARM symbol, the < or > symbol, the programmed
value of the threshold and the corresponding unit disappear.

4.5.3. Triggering of the alarm

If, during continuity measurement for example, a low threshold
value of say 10 Ω is activated, then the device displays
"ALARM < 10.00 Ω ". As soon as the measurement goes below
this value, a continuous audible signal will be emitted to indicate
the continuity, and all of the digital thresholds display will flash.
Similarly, if during insulation testing for example, a high
threshold of say 100 MΩ is activated, the device displays
"ALARM > 100.0 MΩ". AAs soon as the measurement exceeds
this value, a continuous audible signal will be emitted to confirm
the right insulation, and all of the digital thresholds display will
flash.
If no threshold is activated, the threshold digital display turns
itself off.
4.6

Compensation of measuring leads

(C.A 6523 and C.A 6525)

Compensation for the resistance of the measuring leads can
be accessed in continuity measurement mode (20 Ω + or 20 Ω
- positions).
To compensate, simply short-circuit the leads and keep the
key pressed for some time (long press). When the measurement
has been recorded, the buzzer sounds. From this moment
onwards, the measurements displayed will be automatically
reduced by the value recorded and the symbol will be
0
displayed.
To cancel the compensation, leave the leads unconnected and
press the key for some time (long press). As soon as the
instrument measures a value greater than 5 Ω, the lead
compensation is cancelled and the symbol goes out.
0
Turning off the device also cancels the lead compensation.
In all cases, the maximum 20 Ω continuity measurement is
reduced by the recorded compensation value.
Note : when you change the leads, the measurement may
become negative if the compensation is higher than the
resistance measured + the resistance of the new leads. 0.00 is
then displayed up to -0,02 Ω and the
and symbols flash
0
to indicate that the lead compensation is not longer suitable
and should be redone.
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