OPERATION
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Manual EC 24 · EN05 · 2015-02
18
Parameters and modes of the EC 21 / EC 24
The following sections describe the meaning of the individual parameters.
Meter factor (pulse value)
With the meter factor (pulse value), the relevant flow rate at measurement conditions is calculated
from the signal frequency of the sensor element in the electronic totalizing unit:
h
m
3600
K
f
Q
3
M
f:
Signal frequency (Hz)
K:
Meter factor (pulses/m
3
)
Q
M
:
Flow rate at measurement conditions (m
3
/h)
The meter factor has been calibrated in the factory in such a way that working cubic metres are
directly displayed.
Any modification of this adjustment is within the sphere of responsibility of the operating
company.
NOTE!
The new value is immediately used for all calculations performed after each modification of the
meter factor.
The uninfluenced signal frequency of the sensor element is available at the HF output.
The frequency range can be determined from the meter factor K and the minimum and maximum
flow rates at measurement conditions of the meter in accordance with the following formulae:
K
3600
Q
f
min
M
min
K
3600
Q
f
max
M
max
Q
Mmin
: Minimum flow rate at measurement conditions
Q
Mmax
: Maximum flow rate at measurement conditions
K:
Meter factor (pulse value)
Example:
Q
Mmin
= 16 m3/h
Q
Mmax
= 250 m
3
/h K = 2362 pulses/m
3
Hz
5
.
10
Hz
2362
3600
16
f
min
Hz
164
Hz
2326
3600
250
f
max
