ProSoft Technology PTQ-AFC - Manual (Page 146)

Meter Proving PTQ-AFC ♦ Modicon Quantum Platform
User Manual Liquid and Gas Flow Computer for Hydrocarbon Products
Page 146 of 259 ProSoft Technology, Inc.
June 23, 2011
Pulse interpolation ratio (65030+)
Meter-proving pulse counts delivered to the AFC may be fractional, such as
when double chronometry is used with a SVP. This value is the number of
delivered counts that constitute a single actual pulse, so that the actual pulse
count is determined by dividing the delivered count by this. The default value is
1000.0 for compact provers and 1.0 for other types. This parameter is meaningful
only for non-master meter provers.
Flow tube linear coefficient of thermal expansion (65032+)
Holds the coefficient of thermal expansion of the prover barrel material,
meaningful only for non-master-meter provers. Here are some typical materials
and their expansion coefficients.

Stainless steel 304 or 316 16.7e-6/°C
 Monel 14.3e-6/°C
 Carbon steel 11.2e-6/°C
 Invar 1.4e-6/°C
The default value is that of carbon steel, 11.2e-6/°C.
Switch bar linear coefficient of thermal expansion (65034+)
Holds the coefficient of thermal expansion of the external switch bar material,
meaningful only for non-master-meter provers with option External switch bar
(register 65011 bit 6) set. Here are some typical materials and their expansion
coefficients.

Stainless steel 304 or 316 16.7e-6/°C
 Monel 14.3e-6/°C
 Carbon steel 11.2e-6/°C
 Invar 1.4e-6/°C
The default value is that of invar 1.4e-6/°C.
Base prover volume (65036+)
Holds the base volume of the prover barrel as determined by the water-draw
method, in the units specified by Prover size units (register 65018.L). This
parameter is meaningful only for non-master meter provers.
The accepted standards mandate that the base volume of a bidirectional prover
be that registered by a round trip of the displacer.
Flow tube inside diameter (mm) (65038+)
This parameter is the measured inside diameter of the prover barrel at standard
(base) conditions and is meaningful only for non-master meter provers with the
option Prover is double-walled (register 65011 bit 5) clear.
Flow tube wall thickness (mm) (65040+)
This parameter is the measured thickness of the prover barrel wall, and is
meaningful only for non-master meter provers with the option Prover is double-
walled
(register 65011 bit 5) clear.