Flow vision FC01-Ex User Handbook Manual page 23

Definitions and mounting instructions
It should therefore be ensured that the counter can be increased by one during the time
available.
If a separate release network is preferred to the integral network, care should be taken when
processing the max. frequency of 10 Hz to ensure the energy stored in the operating coil has dissi-
pated by the time the counter output is switched on again. The time to do this should be below 40
ms, making due consideration to switching times and pulse variations.
Typical circuit (example 2)
XAS
1 2 3 4
t - switch-on time
ON
t - time constant of switch-off current
L
Note:
q As there will be a reset pulse available at the output in the moment the supply voltage of the
FC01-Ex is applied, make sure that the counter is switched on delayed or set to zero after it
has been switched on.
FC01- Ex | Flow Meter
EX ATMOSPHERE
XAO
5 6 7 8 1 2 3 4 5 6
XAH
7 8 1 2 3 4 5 6 7 8
i
C U
C
U
V
t t t
L ON
inductance of the
counter drive
zener voltage
t
fig. 11
23