Instructions

52
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,
LO
AL
▼
, is lit on the display.
The digital measurement is above the high threshold, the buzzer switches On and the high
overload symbol,
HI
AL
▼
, 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 threshold),
the buzzer switches On and the corresponding overload symbol is displayed.
If, during programming, the value of the low threshold
LO
AL
is higher than the value of the high
threshold
HI
AL
, 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 programmed thresholds continues to be done on the current
measurement.