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5.3 Flow Testing
Flow testing is typically conducted with a reference meter and a temperature controlled water circulation system.
Figure 5-2 shows a typical flow test setup. This setup includes a large water tank, two reference meters, and a
Device Under Test (DUT). Flow is recorded at various flow rates by one of the two reference meters and the
DUT. The temperature of the water is varied by addition of ice or hot water to the tank with a thermocouple
recording the water temperature. A video discussing flow measurements and setup can be found at
Ultrasonic
Water Flow Meter Demonstration.
Figure 5-2. Flow Test Setup
Flows are typically captured over several minutes and averaged to compare accuracies between a reference
meter and the DUT.
Figure 5-3 shows comparative flow tests results for a meter at various flows rates.
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SLAU810B – SEPTEMBER 2019 – REVISED SEPTEMBER 2020
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