Dual Entry Point Method - ABB AquaProbe 2 Installation Manual

Insertion-Type Electromagnetic Probe Flowmeter
AquaProbe 2
A.1.3 Dual Entry Point Method
Refer to Section 2.5 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 millimetres (1in = 25.4mm) i.e. a 36in pipe = 914mm.
1. Insert the probe to a depth of 1/8 the pipe diameter through the original mounting boss.
2. Calculate the insertion factor
12.09
F =
i
1 + +
D
3. Refer to the AquaProbe Transmitter Configuration Manual and enter a Blockage Factor (BL) of value
equal to F .
i
4. Record the flow velocity reading.
5. Insert the probe to a depth of 1/8 the pipe diameter through the second mounting boss.
6. Record the flow velocity reading.
7. Calculate the ratio of the two values recorded.
If the ratio is between 0.95 and 1.05 the flow profile is acceptable and the procedure detailed in Section 4.2
can be used. If outside this ratio the AquaProbe should be resited for optimum accuracy.
36
1.3042
√D
Appendix A
IM/AP Issue 9