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The or symbols, or both, light up on the display depending on the type of threshold
programmed. On the bargraph, the segments correspond to the thresholds shown in reverse
contrast.
When the alarms are On, a second press on switches Off the alarm function (the
alarm symbols disappear).
Note :
If no threshold value has been programmed, when is pressed, a sound signal
(button inoperative) will be emitted by the buzzer and this will not be taken into account.
Sound signal :
The minimum duration of operation of the buzzer on an alarm is 400ms even when this
takes place on a peak value of lesser duration.
When a threshold is crossed, a hysteresis of 1% is applied to its set point, which obliges
the measurement to fall below this lesser value to exit the alarm.
Triggering the alarm :
The digital measurement is below the low threshold, the buzzer switches On and the
low overhead symbol, , is lit on the display.
The digital measurement is above the high threshold, the buzzer switches On and the
high overload symbol, , is lit on the display.
The digital measurement is below the low threshold or above the high threshold (with
programmed value of the low threshold below the programmed value of the high thres-
hold), the buzzer switches On and the corresponding overload symbol is displayed.
If, during programming, the value of the low threshold is higher than the value
of the high threshold , the operation of the detection is reversed giving a sound
alarm in the central zone with the buzzer On and display of both alarm symbols.
Notes:
- When the SMOOTH or PEAK function is in service, detection by the alarms is done on the
smooth or peak values.
- On the HOLD function, the comparison of the programmed thresholds continues to be done
on the current measurement.
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