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AquaProbe FEA100 / FEA200
Electromagnetic flowmeter
A.2.3 Dual Entry Point Method
Refer to Section 3.6, page 15 and fit a second mounting boss directly opposite the one already fitted.
Note. Due to software configuration, all calculations are in metric units. Therefore if using an imperial
pipe, the diameter MUST be converted into millimeters (1 in = 25.4 mm, for example, a 36 in. pipe = 914
mm).
1. Insert the flow sensor to a depth of
2. Calculate the insertion factor.
12.09
-------------- -
=
+
F
1
i
D
3. Refer to the relevant user guide* and enter a Insertion Factor of value equal to F
4. Record the flow velocity reading.
5. Insert the flow sensor to a depth of
6. Record the flow velocity reading.
7. Calculate the ratio of the two values recorded
– if the calculated ratio is between 0.95 and 1.05, the flow profile is acceptable and the procedure
detailed in Section 5.2, page 22 can be used
or
– if the calculated ratio is
*WaterMaster FET1 (OI/FET100-EN) or AquaMaster3 FET2 (OI/FET200-EN)
A.3 Full Velocity Profile
For installations with very poor and asymmetric velocity profiles (for example as rejected in Section A.2.2,
page 29) a full velocity profile provides an improved accuracy of reading. To facilitate this ABB have
developed ScrewDriver software for the PC that calculates F
IM/SDR section 'ABB Flow Profiling'.
30
1
/
the pipe diameter through the original mounting boss.
8
1.3042
----------------- -
+
D
1
/
the pipe diameter through the second mounting boss.
8
between 0.95 and 1.05, re-site the flow sensor for optimum accuracy
not
and F
for any measured velocity profile – see
i
p
OI/FEA100/200–EN Rev. D
.
i
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