Valmet Flowrox FXM Series, Installation, Operation And Maintenance Instructions

Page: 25 / 46

25
4FXM70EN - 8/2022
4.1 MAX Flowrate (output calibration)
The MAX Flowrate value is equal to the pump’s measured
fluid output in millilitre per minute, at the 100% motor speed
adjustment setting. The pump uses the MAX flow rate value
to calculate motor speed for various operating functions and
to display output values.
Each FLOWROX pump is calibrated at the factory and
shipped with a calibrated pump tube assembly installed. The
MAX flow rate value can be adjusted at any time. To achieve
high accuracy, a field calibration under the actual operating
conditions should be performed and the Max Flowrate value
changed to reflect the calibrated amount. Multiply the
Max
Flowrate value by the percentage of error at your calibrated
flow rate to obtain the new
Max Flowrate
value.
Select Max Flowrate and Press ENTER button.
Press UP or DOWN arrow to scroll through 0 - 9 on selected
digit.
Press RIGHT arrow to scroll over to next digit to right. If
you pass your desired digit, you can easily scroll back by
continuously pressing RIGHT button.
Press ENTER to save changes.
Select ←
Back
on the main menu screen to exit the menu
structure and enter the run mode.
Every pump tube assembly model number has a published
maximum flow rate value which is based on laboratory tests
pumping water at room temperature at 36” suction lift against
0 psi back pressure. Your actual output may vary due to fluid
viscosity, fluid temperature, suction lift height, piping system
layout, manufacturing tolerances and to a lesser degree,
variations in system pressure and tubing wear.
To achieve high accuracy, the pump’s output should be
measured (calibrated), and the MAX Flowrate value (in
millilitre per minute) updated.
Conditions that require calibration:
• At the initial pump start up.
• When a new tube assembly is installed. Run the pump
with or without fluid for approximately 30 minutes prior
to calibration.
• When the piping system configuration is changed.
• When the suction lift height is changed.
• Periodically during the life of the tube. Output variances
are most noticeable prior to tube failure.
To calculate the Max Flowrate:
To determine the amount of error at your output setting,
divide the actual output amount by the indicated output.
Then multiply the resulting percentage of error by the Max
Flowrate value currently showing in the pump.
Example: If the pump display indicates the output is 170 ml/
min but the actual measured output is 160 ml/min, calculate
the percentage of error by: 160/170 = 0.941. Multiply the
Max
Flowrate value by 0.941 and enter this new value.