Methods and systems for determining a base field prover volume of a field prover include connecting together a transfer meter assembly, a master prover, and the field prover in series. A flow of fluid at a first flow rate is provided and a calibration sequence is performed at the flow rate. The calibration sequence includes counting pulses generated by the transfer meter assembly over a duration of each pass of the master prover and a pass of the field prover. An intermediate calibrated field prover volume is determined from a ratio of the field prover pulse count to the average master prover pulse count, multiplied by a base master prover volume. The calibration sequence can be repeated to provide at least three intermediate calibrated field prover volumes at the first flow rate. The calibration sequence can be repeated at different flow rates to arrive at the base field prover volume.
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