Operation
i
ndu
Q
®
- Series VMM
- 44 -
© SIKA
•
Ba_VMM_us
•
09/2018
Excitation frequency:
The function
Excitation frequency
is in-
tended for setting the excitation frequency of
the field coil current. Because of the induct-
ance of the field coils the maximum frequen-
cy is limited and that’s why it can’t be as-
signed freely.
The factory-set for the excitation frequency
is 6.25 Hz.
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 "Selection window
/ make a selection".
Caution! Reference calibration re-
quired!
If the excitation frequency is changed,
a reference calibration (
calibration on / off", p. 41) must be ac-
complished!
Otherwise the measuring accuracy is
not ensured.
Mains frequency:
To provide the optimum interference sup-
pression the mains frequency is needed and
the function
Mains frequency
is intended to
enter this parameter.
The default setting is 60 Hz.
After choosing the function
Mains frequen-
cy
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 "Selection window
/ make a selection".
Flow direction:
This function is intended to define the flow
direction that is taken into account by the
display electronics.
That way for example the setting "
forward
"
will prevent reverse flow from being meas-
ured.
After selecting the function
Flow direction
using the key
or
and pressing Enter,
the current setting will be displayed.
Example:
For this parameter the following settings are
available:
Output signal curve at the setting
forward
:
reverse
:
Excitation freq.
[6.25Hz]
Mains frequency
[60] Hz
Flow direction
[forward]
