Technical Note
Technical Note: PendoTECH Process Control Systems: Pump Calibration
Revision 0
Page 3 of 5
Figure 3.2 TFF GUI "Maintenance View" Tab
Note: The input fields for the “Filtrate Pump” will only appear if “Yes” is selected from the drop-
down menu located below the text reading “Enable filtrate Pump”.
The following table lists some of the most popular nominal pump calibration paramters for PendoTECH’s
standard offering of pumps used with either the NFF or TFF control system. As shown below, the mL/rot
parameter for peristaltic pumps is dependent on tubing size while it is constant for diaphragm pumps
irregardless of the size of tubing connected to the inlet/outlet. The nominal values listed below are taken
directly from manufacturer documentation.
Manufacturer
Model
Max
RPM
ml/rot
(Size 14)
ml/rot
(Size 16)
ml/rot
(Size 17)
ml/rot
(Size 24)
ml/rot
(Size 36)
Quattroflow
Q150
3000
1
Quattroflow
Q1200
1200
17
Quattroflow
Q4400
583
99
Masterflex
L/S
600
0.22
0.8
2.8
2.8
4.8
Watson-Marlow
120U
200
0.14
0.47
N/A
N/A
N/A
Please refer to vendor documentation provided on PendoTECH.com or contact PendoTECH customer
service if you do not see your pump or tubing size listed above. In most cases, the mL/rot is the maximum
flow in mL/min divided by the maximum RPMs.
4. Flow Verification
This section will illustrate how to further calibrate
pumps if the nominal settings described in section 3
are insufficient. The PendoTECH NFF and TFF
systems control pumps, set to remote control, by
sending analog signals, generally 4-20 mA, that are
proportional to the flowrate entered by the user. The
user enters the unique calibration values for the
pump they are using as described in section 3. The
system then scales the ouput linearly from the
minimum flow value (0 LPM) to the calculated
maximum flowrate which is simply equal to MAX
RPM * mL/rotation. The following graph shows the
control logic for a Masterflex L/S pump with size 16
tubing installed.
