VISCOUS FLUIDS, MEASURING RATE OF FLOW V020-1
The Hydraulic Institute standard ANSI/HI 3.6 Rotary Pump Test recommends measurement by weight.
Measure the change in weight of a tank, during a specific time period.
- The tank can be located on the suction or discharge side of the pump.
- All flow in or out of the tank must pass though the pump.
- You need accurate methods of measuring the weight and time. You need an accuracy of one вЂ“quarter of one percent for both measurements.
Another method is measurement by volume.
- Measure the change in liquid level in a tank or reservoir of known volume during a measured period of time.
- The tank or reservoir can be located on the suction or discharge side of the pump.
- All flow in or out of the tank or reservoir must pass through the pump.
- Measure the levels by floats. vertical gauge glasses, or any other accurate gauge that makes sense.
Positive Displacement Meters provide direct reading volume measurement.
- The time interval for the collection period should also be measured to an accuracy of one-quarter of one percent.
Pay close attention to the volume of the tank or reservoir you’ll be using to measure the flow.
- Especially the effect of temperature on its capacity.