Answer / Fareed Ahmad

Calibrating a Square Root Flow Transmitter involves several steps, including Range Calibration, Hook-up Series Connection, Zero Check, Pressure Application, and Output Verification. Here's an example of the process using a hypothetical flow transmitter model:

1. Range Calibration: Set the transmitter to measure within its specified range (e.g., 0-150 GPM).

2. Hook-up Series Connection: Connect the transmitter in series with the process piping and pressure gauge, ensuring proper connections according to the manufacturer's instructions.

3. Zero Check: Apply zero flow conditions by closing the upstream valve and verifying that the transmitter output reads its minimum value (e.g., 0mA).

4. Pressure Application: Apply a known pressure to the piping system, allowing the fluid to flow through the transmitter. The output should be proportional to the applied pressure and flow rate.

5. Output Verification: Verify that the transmitter's output is proportional to the applied pressure and flow rate. If the output is not proportional, you may need to recheck your connections, recalibrate the transmitter, or consult the manufacturer for further assistance.

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