Operation
i
ndu
Q
®
- Series VMM
- 26 -
© SIKA
•
Ba_VMM_us
•
09/2018
Totalizer reverse:
If you select the function
totalizer re-
verse
, the current value of the totalizer re-
verse will be displayed.
Example:
The displayed unit is defined in the functional
class TOTALIZER using the function
total-
izer unit
.
Flow velocity:
If you select the function
flow velocity
the
LCD shows the current value of the average
flow velocity of the medium.
Example:
The displayed unit is always meters per sec-
ond (m/s).
The average velocity is calculated from the
measured volume flow and the cross section
of the meter tube. For the calculation of the
cross section, the inside diameter of the me-
ter tube is needed.
It will be defined by the function
inside di-
ameter
in the functional class SETTINGS
VMM“.
Relative flow rate:
The relative flow rate Q
rel
is the percentage
ratio of the (current) volume flow Q
abs
and the
upper range value of the volume flow.
The calculation of the relative flow rate is
based on the following formula:
%
100
limit
range
lower
limit
range
upper
limit
range
lower
abs
Q
rel
Q
⋅
−
−
=
If you select the function
relative flow
,
the following will be displayed.
Example:
QV + forward totalizer 1:
If the function
QV totalizer 1
is selected,
in the first line the value of the forward total-
izer 1 and in the second line the current val-
ue of the volume flow will be displayed.
Example:
The displayed unit for the volume flow is de-
fined in the functional class FLOW using the
function
volume flow unit
.
The unit of the totalizer is defined in the
functional class TOTALIZER using the func-
tion
totalizer unit
.
QV + forward totalizer 2:
This function is basically similar to the func-
tion
QV°totalizer 1
.
The only difference is that in the first line the
value of the forward totalizer 2 is displayed.
Example:
Totalizer rev.
000000.0 USG
flow velocity
1.5 m/s
Relative flow
95.3 %
XXX.X USG
T1 XXX.XX USG/min
XXX.X l
T2 XXX.XX USG/min
