Setting Up; Centre Line Method; Mean Axial Velocity Method (1/8 Diameter); Partial Velocity Traverse - ABB AquaMaster4 Operating Instructions Manual

A Q U A M A S T E R 4 | E L E C T R O M A G N E T I C F LO W M E T E R I N S E R T I O N S E N S O R | O I/ F E W 4 0 0/A P - E N R E V. B

Setting up

The basic equation for volume measurement using the
insertion sensor is:
Q
=
Where: Q =
Fi = insertion factor
Fp = profile factor
V = velocity
A = area
The profile factor and insertion factor must be determined as
detailed below (as applicable). The pipe diameter must be
accurately determined, see page 14 for use of gauge.
IMPORTANT (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).

Centre line method

1 Determine the internal diameter D of the pipe, in millimeters,
by the most accurate method available.
2 Determine the profile factor Fρ from Figure 14.
3 Calculate the insertion factor
1
F =
i
1 – (38/(πD))
Example: for a pipe of internal diameter 593 mm (23.35 in):
Fρ = 0.861 (derived from Figure 14)
1
=
F
i
1 – (38/(π593))
F = 1.021
i
Pipe bore in inches
8 16 24 32
0.875
0.870
0.865
0.860
0.855
0.850
200 400 600 800
Figure 14 Profile factor vs velocity for pipe
sizes 200 to 2000 mm (8 to 80 in)
A F Fρ V
i
flow rate
40 48 56 64
1000 1200 1400 1600
Pipe bore in mm

Mean axial velocity method (1/8 Diameter)

1 Determine the internal diameter D of the pipe, in millimeters,
by the most accurate method available.
2 A profile factor Fρ of 1 must be used.
3 Calculate the insertion factor
12.09
F i = 1 +
Example – for a pipe of internal diameter 593 mm (23.35 in):
Fρ = 1
12.09
F i = 1 +
593
Fi = 1.074

Partial velocity traverse

Refer to page 28 for the procedure.

Transmitter setup

The transmitter can be set up to display point velocity, mean
velocity or flow rate, as required. For full programming details
refer to Instruction manual: OI/FET400-EN.
Menu entries must be made for:
• Profile Factor Fρ
• Insertion Factor F
• Insertion sensor pipe bore (mm)
72 80
1800 2000
1.3042
+
D
D
1.3042
+
593
c
13