ProSoft Technology MVI56-AFC - Manual (Page 49)

MVI56-AFC ♦ ControlLogix Platform Meter Proving
Liquid and Gas Flow Computer User Manual
ProSoft Technology, Inc. Page 49 of 316
February 25, 2011
4.1.5 Prover Characteristics
Prover Characteristics will vary based on the type of prover and options you
select. The following topics describe each field and its operating range.
Prover size units (65018.L)
This parameter sets the units in which the prover's base volume is represented.
This parameter is not meaningful for master meter provers.
Meter factor precision (65028+)
This parameter is a number between 0.00000001 and 0.0001. The default setting
is 0.0001
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
9.3e-6/°F 16.7e-6/°C

Monel 7.9e-6/°F 14.3e-6/°C

Carbon steel
6.2e-6/°F 11.2e-6/°C

Invar
.8e-6/°F 1.4e-6/°C
The default value is that of carbon steel, 6.2e-6/°F 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
9.3e-6/°F 16.7e-6/°C

Monel
7.9e-6/°F 14.3e-6/°C

Carbon steel
6.2e-6/°F 11.2e-6/°C

Invar .8e-6/°F 1.4e-6/°C
The default value is that of invar .8e-6/°F 1.4e-6/°C.