This publication has been prepared to provide guidance for the calibration, using small volume provers (SVPs), of reference meters specifically used for proving loading gantry meters . A principal requirement for this application is that the proving be carried out, wherever practicable, using the actual grades of product metered by the gantry meters, in order to minimise measurement uncertainty associated with the use of different viscosity test liquids.
This procedure for calibration of the reference meter using SVPs may therefore differ from that described in other Parts of the Petroleum Measurement Manual dealing with other applications of small volume provers and their calibration. Small volume provers provide a closed system method of meter calibration that may be used in the field. They offer the advantage that comparatively small volumes of actual metered products are used in the operation
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