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Parameters and Modes of the TERZ 94 / 94-S
In the following text, the individual parameters are described in detail.
1. 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:
f
=
Q
M
K
f:
Signal frequency (Hz)
K:
Meter factor (pulses/m
Q
:
Flow rate at measurement conditions (m
M
The meter factor has been calibrated in the factory in such a way that working
cubic metres are directly displayed. Its value can be read from a label located
on the left side of the case.
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:
Q
=
M
f
min
3600
Q
: Minimum flow rate at measurement conditions
Mmin
Q
: Maximum flow rate at measurement conditions
Mmax
K:
Meter factor (pulse value)
Example:
3
Q
= 16 m
/h
Mmin
Operating Instructions for the TERZ 94 Electronic Turbine Meter
⎡
⎤
3
m
⋅
⎢
⎥
3600
⎣
h
⎦
3
)
⋅
min
K
Q
= 250 m
Mmax
TERZ 94 / 94-S
3
/h)
Q
=
⋅
M
max
f
K
max
3600
3
/h
K = 2362 pulses/m
Operation
3
29
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