MASTERFLEX
®
Digital Pump Drive Operating Manual 3-9
Cole-Parmer
Section 3
Operation
Tubing Calibration: Calibrate the tubing (if precision is required).
Figure 3-6.
Tubing Calibration Selection Screen.
The drive comes preset with flow values based on the tubing ID and pump
head selected. PLEASE NOTE that the preset values assume the pump is
dispensing water with no back pressure. Every batch of tubing can have a
slight variation in ID and wall thickness. MASTERFLEX® tubing is
manufactured to tight tolerances and is required for warranty and provides
optimal pumping performance and accuracy. Different pumping
conditions including fluid viscosity, specific gravity, back pressure, suction
lift, and temperature can reduce pumping performance. As a tubing wears,
and precision is required, periodic calibration is recommended.
Calibration is performed by running the drive for a specific interval and
rpm and correcting for the volume actually dispensed. To perform the
calibration you will need an accurate way to measure the fluid being
dispensed. A graduated cylinder can be used, but if the specific gravity or
density of the fluid is known a balance is recommended for the best
accuracy.
1. Insert appropriate tubing into Pump Head.
2. Insert tube inlet into supply fluid.
3. Insert tube outlet into desired container. Container should be a
graduated cylinder; or a container placed on a balance may be used for
increased accuracy.
If using a balance, an acceptable weight to volume conversion for water
is 1 gram = 1 mL.
4. Turn on drive by connecting power to the rear of the drive.
5. Go to the Mode Settings Menu by selecting the SETTINGS icon
and pressing the ENTER key. Use the UP and DOWN keys to
highlight TUBING CAL icon in the Settings Menu and press the
ENTER key.
Settings Menu
(continued)
