Chauvin Arnoux C.A 1725 Notice D'utilisation page 39

Measurement frequency range
Functions available
Accuracy
Input impedance
Balanced signals mode
TTL signals mode
Maximum voltage
Acceptable overload (1second)
Example of DUTY CYCLE Measurement on EXTERNAL INPUT
When the external input is used, the FRB connector provided with the device must be connected to the
source of the signal to be measured, then to the connector marked EXT.
Consider a signal like the one shown in the figure below:
Here, the frequency of the signals is given by the formula :
1
f =
T
T = 5 x 1ms = 5ms
1
so f = = 200Hz
5.10 -3
from 1Hz to 10kHz
from 0.1Hz to 10kHz in expanded range
same as optical sensor
same as optical sensor
≥ 75kΩ
300mV ± 90mV at 1kHz
Thresholds 600mV ± 160mV at 10kHz
Hysteresis 250mV ± 80mV
1.1V ± 150mV to 1kHz
Thresholds 2.2V ± 300mV to 10kHz
Hysteresis 250mV ± 80mV
± 20V peak
250Vrms
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