i
ndu
Q
®
- Series VMM
Operation
Technical changes reserved
- 43 -
Sensor constant CFH:
The sensor constant CFH is determined by
calibration and it’s a characteristic value for
the sensor.
The value for CFH must be entered to ensure
a correct measurement. It will be found on
the rating plate of the sensor.
After selecting the function
Sensor con-
stant
function using the key
or
and
pressing Enter, the parameter level will be
entered and the actual value for sensor con-
stant CFH will be displayed.
Example:
CAUTION! Measuring errors!
Changing the sensor constant CFH to
a value that differs from the value on
the rating plate of the sensor will re-
sult in measuring errors!
Note
The CFH value is signed. If the inlet
and outlet are mixed up during instal-
lation (the flow of direction is marked
on the sensor with an arrow), the dis-
play electronics displays negative
measurement values in the "Supply".
A positive value is displayed again by
changing the sign of the CFH value.
No changes to the electrical cable
connections are required.
Sensor type:
The function Sensor type is intended for de-
fining the type of sensor which is connected
to the display electronics. The distinction of
the sensor type is necessary and essential
because the algorithm for flow rate calcula-
tion differs from sensor type to sensor type.
After selecting this function using the key
or
and pressing Enter, the current setting
will be displayed:
Example:
This parameter is factory-set and it has to be
changed only when the transmitter is used
with a different type of sensor.
Inside diameter:
The inside diameter of the connected sensor
is needed for calculating the mean flow ve-
locity. To ensure a correct measurement the
diameter must be specified exactly.
After choosing the function inside diameter
using the key
or
and pressing Enter,
the following selection field will be displayed.
Example:
For changing the parameter please refer to
the description in Section "Input window /
modify a value".
Language:
English and German are available for the us-
er guidance of the VMM.
The function
Language
is intended for setting
the language.
After choosing the desired function using the
key
or
and pressing Enter, the follow-
ing selection field will be displayed:
Example:
For changing the parameter please refer to
the description in Section "Input window /
modify a value".
CFH
0332.90
Sensor type
[TYP VMM]
Inside diameter
0050 mm
Language
[English]
