ANSI B109.2:2000 pdf free download – DIAPHRAGM-TYPE GAS DISPLACEMENT METERS
1.53 PROVER, CRITICAL FLOW. See 1.70, SONIC FLOW NOZZLE.
1.54 PROVER, TRANSFER. A device for determining the accuracy of a meter under test by comparing its reading against the reading obtained from a calibrated reference meter connected in series with the meter under test.
1.55 PROVING CIRCLE. See 1.1 1, CIRCLE(S), TEST.
1 5 6 READING CIRCLES. Those circles that indicate the volume of gas passed through the meter and are commonly used for billing purposes. See also 1.10, CIRCLE(S), READING
1.57 RECORDER, DEMAND. An instrument that records gas flow rate as a function of time.
1.58 RECORDER, PRESSURE, CLOCK-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations of pressure relative to time by means of a clock-driven circular chart.
1.59 RECORDER, PRESSURE AND TEMPERATURE, CLOCK-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations in pressure and temperature relative to time by means of a clock-driven circular chart.
1.60 RECORDER, PRESSURE, TEMPERATURE AND VOLUME, CLOCK-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations in pressure and temperature and units of volume relative to time by means of a clock-driven circular chart.
1.61 RECORDER, PRESSURE, TEMPERATURE AND VOLUME, METER-DMVEN CIRCULAR CHART. An auxiliary device designed to record variations in pressure and temperature relative to volume by means of a circular chart- driven by the meter.
1.62 RECORDER, PRESSURE AND VOLUME, CLOCK-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations in pressure and units of volume relative to time by means of a clock-driven circular chart.
1.63 RECORDER, PRESSURE AND VOLUME, METER-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations in pressure relative to volume by means of a circular chart driven by the meter. The area under the pressure recording is related to the volume corrected for pressure.
1.64 RECORDER, TEMPERATURE, CLOCK-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations of temperature relative to time by means of a clock-driven circular chart.
1.65 RECORDER, TEMPERATURE AND VOLUME, CLOCK-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations in temperature and units of volume relative to time by means of a clock-driven circular chart.
1.66 RECORDER, TEMPERATURE AND VOLUME, METER-DRIVEN CIRCULAR CHART. An auxiliary device designed to record variations of temperature relative to volume by means of a circular chart driven by the meter. The area under the temperature recording is related to the volume corrected for temperature.
1.67 REGISTRATION. The indicated volume of gas passed through a meter.
1.68 REMOTE METER READING DEVICES. A device for a gas meter that provides or reproduces a reading of the meter index at a point remote from the meter. The reading may be displayed for visual observation, recorded in a portable device or transmitted to a distant point.
1.69 SEAL. A device designed to provide evidence of tampering with a meter.
1.70 SONIC FLOW NOZZLE. Also referred to as SONIC FLOW PROVER or CRITICAL FLOW PROVER. A device employing either venturis, orifices or sonic nozzles as restrictions that is used for testing meters, usually at elevated pressures, by passing gas or air through both the meter and restriction and finally discharging it at a lower pressure that maintains sonic velocity (critical flow) through the restriction. The time for a given quantity of gas or air to pass through the meter compared with the restriction standard time corrected for test conditions provides a measure of meter accuracy.