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FC7x0
Accuracy
8.3 Mass flow accuracy
Maximum deviation D is made up of zero point stability Z and accuracy D
following formula:
D =
D
D
0
Basic accuracy depends on the product version selected and can be found in the tables
in chapter Accuracy of mass flow and density according to the order code [} 32].
The following calculation formulas for Q
Above mass flow Q
on the product version and can be found in the tables in chapter Accuracy of mass flow
and density when combined.
Use the following formulas to calculate the maximum deviation D:
Q
Q
D
D
flat
a, b
Meter size Order code
(Q
in kg/h)
FCS700
DN200
(900000)
1)
Q
your local Siemens sales organization.
30 / 180
Z
x 100 % + D
0
Q
Maximum deviation in %
Accuracy
, maximum deviation is constant and referred to as D
flat
≥ Q
m
flat
< Q
m
flat
Maximum deviation in %
Maximum deviation for high flow
rates in %
Constants
Order code
position 13
position -Z
nom
6
-
3
-
9
N1A
9
N2A
determined with SITRANS FC HART firmware rev.4. For details, please contact
flat
A5E52748387-AA, 2023/09
Mass flow in kg/h
Q
Zero point stability
Z
apply for size DN200 only:
flat
D = D
flat
a × 100 %
D =
+ b
Q
m
Mass flow in kg/h
Q
m
Mass flow value above which D
Q
applies, in kg/h
flat
D
Q
flat
in %
in kg/h
0.2
36000
0.1
45000
0.75
36000
0.5
39100
Mass flow accuracy
, resulting in the
0
. It depends
flat
1)
a
b
flat
in kg/h
in %
49.100
0.064
30.000
0.033
49.100
0.614
39.800
0.398
flat
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