TECHNICAL UPDATES

Pump Calibrating Procedures For Flush Manifolds

When calibrating a peristaltic pump, chemical is dispensed from the discharge side of the pump into a beaker or other measuring container at the point of injection. To properly calibrate a peristaltic pump that injects into a flush manifold through a checkvalve and into dynamic water pressure, another method must be used.

For greatest accuracy, the correct calibration method is to measure at the suction side of the pump. By drawing chemical out of a beaker or other measuring container and noting the liquid level before and after the pump runs, you can easily determine the amount of chemical dispensed.

Another benefit of this calibration method is that it’s quicker and easier. You don’t need to disconnect the squeeze tube from the manifold to get a calibration…that’s a real time saver!

The following diagram is an example of using the suction side of the pump to draw chemical out of a graduated cylinder. Do not remove the suction tubing from the pump. An accurate calibration requires that all tubes, which constitute friction loss and head pressure, be in place.