9

Terminology

Bottom loading: Method of filling a volumetric vessel. Intake is made with a bottom load adapter. Capacity, nominal : T he nominal capacity of a field standard test measure or prover is the volume used to designate the measure or prover. The volume is determined by the nominal mark on a graduated upperneck gauge and between the nominal mark on the graduated upper neck gauge and the lower shut off cock or zero mark on a lower neck gauge on a prover.

NOTE: The nominal capacity of the prover has be set at the Seraphin

facility using Standards that are traceable to the National Institute of Standards and Technology (NIST). If uncertainty values or a higher order of calibration is needed the unit should be sent to a certified calibration laboratory.

Cubical coefficient of thermal expansion:
-1 Three dimensional expansion or contraction of a material dueto temperature change, expressed

°

or °

F
-1 Field standard test measure: Ameasure that can be hand held and is usually less than 40 Liters (10Gallons). "High Resolution” standard: A standard with a small diameter neck for improved resolution in reading themeniscus.Generally used in the laboratory as a standardor check standard for measurement control of a primary standard. Main flow cessation: The moment when a full dischargestream "breaks" and becomes a trickle or a drip. Prover

:

Bottom drain is implied. Filled from the top or bottom loading, depending on intended use. May befree standing, mounted permanently, or on truck or professional trailer and not hand held. Reference temperature: The temperature at which the measure is intended to contain or to deliver itsnominal capacity. Sight-flow-indicator: A professional fitting with windows to visually observe the flow through a pipe. Submerged fill pipe: Pipe used in top filling tominimize foaming of liquids, such as fuel oil and milk, by dischargingthe product into the bottom of a prover. To contain : An indication that the standard is adjusted to contain its intended volume when filled from itsempty condition at a reference temperature. (the emptycondition is "dry" and test measures or provers are generally not used in this condition). To deliver: An indication that the standard is adjusted to deliver its intended volume at a referencetemperature. Provers used in a "wet" condition are marked To Deliver. Tolerance: Maximumpermissibleerror. A value fixing the limit of allowable error or departure from thetrue performance or value. Vapor recovery: A system for entrapping and collecting vapors for return to the tank to prevent expulsioninto the atmosphere.

Seraphin® - 30 Indel Avenue – Rancocas, NJ 08073 Tel: 1-609-267-0922 Fax: 1-609-261-2546 e-mail:sales@seraphinusa.com Pub E91-4043