© 2019 Department of Petroleum Resources. All rights reserved Department of Petroleum Resources (DPR) PROCEDURE GUIDE

Page 112 of 114

111 | P a g e

Straight pipe sections where a flow meter is installed
• Instrument Loop:
The assembly of all devices and data links from the sensing element to the visual indication
in the computer part of the metering system.
• Metering system:
Includes mechanical part, instrument part and computer part, including the auto-sampling
system
• Transmitter:
Technical device, which changes the nature of the measured signal and transports the signal
to from one equipment to another
• Resolution:
The least variation in signal level, which produces a noticeable change in the displayed value
• Flow meter:
Equipment located in or clamped to a pipe and its signal transformer, to provide a primary
signal proportional to the amount of flow through the pipe.
• Thermowell:
•

A well in the meter tube for installation of a thermometer
• Calibration factor for turbine meter:
•

This is a number that indicates the ratio between volume throughput and readings of the
turbine meter. The term is used to cover both the terms “meter factor” and the “K-factor”.
•
Uncertainty in measurement:
•

An estimate characterising the range within which the measured value will be found. In
these guides this is at 95 percent confidence level, c = 2.
•
Inferential meters
•

These are meters with no measurement compartments to trap and then release the gas.
These meters are categorised as inferential meters in that the volume passed through them
is “inferred” by something else observed or measured.