72 FLOWSIC600 · Technical Information · 8010125 V 4.0 · © SICK AG
Flow Calibration
Subject to change without notice
The FWME is calculated by the test labs according to the equation:
If the meter is calibrated for bidirectional use, a second weighted mean error (FWME) is
determined using the values established separately for each direction of flow.
The new adjust factor is calculated as follows:
The error curve "Dev.as found" shows the deviation of the tested meter (FLOWSIC600)
relative to the test stand (Reference meter(s)) without any correction of the FLOWSIC600
output behavior (
Figure 19). The error curve "Dev. as left" shows the deviation of the
FLOWSIC600 after correction with the Adjust factor.
Figure 19 Calibration curve for adjustment with constant factor
Q
i
: Tested flow rate
Q
max
: Tested maximum flow rate
E
i
: Mean error in % established at the tested flow rate
FWME
=
i = 1
n
k
i
• E
i
i = 1
n
k
i
where k
i
=
Q
i
Q
max
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