7ML19985CS01
Milltronics Millflo – INSTRUCTION MANUAL
Page 11
Calibration
General
After the Millflo has been properly installed, calibration of the solids flowmeter system
should be done in conjunction with the integrator. Refer to the integrator instruction
manual for programming and calibration. The calibration is initially done using a test
weight. Material tests are recommended to achieve maximum accuracy.
Test Rate
The test rate is the material flowrate represented by the test weight. The test weight is
used to simulate the horizontal forces of the material hitting the sensing plate.
CALCULATION OF TEST WEIGHT AND TEST RATE
Select the test weight to represent a calibration point of 60% to 80% of the Design
flowrate based on the Millflo Calibration Constant of 45 g / T/H (tons per hour).
1
Test Weight = Design Flowrate x Calibration Point x Calibration Constant
Test Rate = Test Weight
Calibration Constant
For Example:
If the Design Flowrate is 6 T/H, then
Test Weight 60%
= 6 T/H x 60% x 45 g / T/H
=162 g
Test Weight 80%
= 6 T/H x 80% x 45 g / T/H
= 216 g
Therefore the test weight should be between 162 g and 216 g.
If an available test weight of 200 g is used, then
Test Rate = 200g
45 g T/H
= 4.444 T/H
1.
The Calibration Constant represents an average of a range of values covering
various material flow arrangements and materials handled by the Millflo. It is an
approximate value to be used in the calculation of the Test Rate. Through the
running of material tests, the Test Rate may be factored to obtain an optimum
value which should lie in the range of 50% to 100% of the Design Rate. The Test
Rate should never exceed 100% of the Design Rate.
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