Provers

Question 1

If the meter being proved by a conventional pipe prover has a resolution of 1 barrel, what
is the necessary minimum capacity of the prover?

Answer 1

Since provers need to be in the 0.01% accuracy this prover would need at least 10000 barrels

Question 2

Explain what the electronic meter proving counter counts during a proving run

Answer 2

Pulses that are produced by a ball moving through the detectors in the prover

Question 3

Explain why it is necessary to flow the measuring fluid through the prover and meter for
a while before performing a proving run.

Answer 3

1) Get the prover up to process temperature
2) Ensure prover is full

Question 4

What is the end result of a proving run on a meter and how is it used?

Answer 4

A meter factor is derived from the test. This meter factor can be multiplied by the meter’s register to obtain a corrected volume display.

Question 5

Explain why a small volume prover does not require 10,000 or more counts/pulses from the
meter being proved.

Answer 5

Small volume provers use the double chronometry method to calculate the fractional meter count

Question 6

Give a typical application for small volume provers, and are they usually a fixed or
portable type device?

Answer 6

A portable device that can be used to prove meters in the field

Question 7

Explain how a tank prover works

Answer 7

Process fluid goes into a tank of known volume and the level is measured. The tank can also be weighed gravimetrically before and after for gravimetric proving.