Yokogawa ADMAG CA - Manual (Page 11)

4.INSTALLATION
I M 1E8B0-01E
4-2
(4) Applicable Velocity Range in Low Conductivity Fluid Measurement
• In the application for pure water, pure alcohol and other fluids which have
low conductivity with low viscosity, fluid velocity should be within the
range of Applicable velocity range which is shown in the figure listed
below depending on fluid conductivity.
• The fluid that cause phase separation and has higher fluid conductivity
around the inner surface of the flowtube cannot be measured.
0.1 1 10
1
2
3
4
5(15)
6
7
8
9
10(30)
0
Size 15 to 100mm (0.5 to 4 in)
Conductivity
µ
S/cm
Flow
Velocity
m/s (ft/s)
Application Velocity
Range
1 10 100
1
2
3
4
5(15)
6
7
8
9
10(30)
0
Size 150, 200mm (6, 8 in)
Conductivity
µ
S/cm
Flow
Velocity
m/s (ft/s)
Application Velocity
Range
(5) Liquid Conductivity
Please avoid to install the flowmeter at location where liquid conductivity is
likely to be non-uniform. Because it is possible to have bad influences to the
flow indication by non-uniform conductivity when a chemical liquid is in-
jected from upstream side close to the flowmeter. When this occurs, it is
recommended that chemical application ports are installed on the down-
stream side of the flowmeter. In case chemicals must be added upstream
side, please keep the pipe length enough so that liquid is properly mixed.
(BAD)
Upstream side
(GOOD)
Downstream side
IMPORTANT
IMPORTANT