ZOE
ZOE K04/0718
Page 29
Since some useful information cannot be displayed in this case, it is recommended to
use a bigger unit to avoid the loss or to use the smaller display for totalizers.
9.7 Pulse output (only with ZOE-ZE Supply option 3)
A scalable pulse output is available for the options ZOE-ZExxxx3xx. When the pulse
output is enabled, a scaled pulse output train is given at the output to the input pulses.
The pulse width of the pulses is adjustable between the span of 1 ms to 20 sec.
When pulse output is activated, the symbol "
" for pulse output is highlighted on the
display. The electrical output of the pulse output is push-pull type, so HIGH and LOW
is actively switched through to the output.
To generate the output pulses, the input pulse train is directly processed in connection
with the scaling factor “K0”, the output pulses are therefore not derived from the
calculated volume flow. The pulse output is based on a linear path of the input signal.
Sensors are used with nonlinear characteristic, with the usage of linearization function
only the updated volume flow can be linearized, pulse output and volume counter
cannot be linearized.
Behaviour at OVERFLOW:
If the measured volumetric flow lies in the OVERFLOW range, the pulse output is
switched off and a constant HIGH level is switched at the output.
Generation of the output pulse train:
The maximum adjustable pulse rate for the pulse output is 1000 pulses per liter. This
means that the minimum pulse volume that can be represented by the pulse output is
0.001 Liter per pulse. Furthermore, the set pulse volume must meet following
condition:
∗ 1
100
60 ∗
0.5
In case if the above mentioned condition is not complied with, it may lead to a long
lagged pulse train at pulse output even when the input frequency signal has been
interrupted and removed. While configuring the pulse output, if the above condition is
violated, the user will be informed via notification on the display with “Lagged pulse
train possible. Please check the settings.” In case if the measuring range endpoint is
changed during the operation of pulse output, the user needs to check the pulse
output settings once again.
The pulse output works only in the measurement mode i.e. in the menu mode, no
pulses will be generated at the output. The pulses acquired in the menu mode will be
given out once the normal measuring mode is activated again, leading to no loss but a
delayed pulse train at the output depending on how long the menu mode remains
active.
