ProSoft Technology PTQ-AFC - Manual (Page 15)

PTQ-AFC ♦ Modicon Quantum Platform Start Here
Liquid and Gas Flow Computer for Hydrocarbon Products User Manual
ProSoft Technology, Inc. Page 15 of 259
June 23, 2011
1.2 Update Notice
If your module measures liquids, please read this notice before upgrading from
version 2.04 (or earlier) to 2.05 (or later).
For compliance with new measurement standards, the AFC version 2.05 has
introduced several new liquid product groups. In particular, the two non-refined
liquid product groups of version 2.04, which covered the entire density range of
crudes and NGLs, have each been split into two separate product groups, one
for the higher density range of crudes and the other for the lower density range of
NGLs. If your module has meter channels configured for either "Crude, NGL" or
"Oil-water emulsion", you should decide before upgrading the firmware the
new product group (light or heavy) to which each such channel should be
assigned. This assignment will be performed during the upgrade process and will
preserve all other configuration and historical records including accumulator
values and archives, in contrast to changing a product group after the upgrade
which resets the meter configuration and erases all historical records. Meter
channels configured for "Gas" or "Refined products" are not affected.
AFC Manager exhibits the same behavior when converting a project between
versions 2.04 (or earlier) and 2.05 (or later).
The criterion for assigning the new product group depends on the density units
and the Default Reference Density, as described in the following tables:
Density Units = kg/m3
Version 2.04 Product Group Default Reference Density Version 2.05 Product Group
Crude, NGL = 0 OR 610.0 Crude oils, JP4
Crude, NGL
> 0 AND < 610.0 NGLs, LPGs
Oil Water Emulsion = 0 OR 610.0 Oil-water emulsion (Crd)
Oil Water Emulsion > 0 AND  610.0 Oil-water emulsion (NGL)
Density Units = Rd/60
Version 2.04 Product Group Default Reference Density Version 2.05 Product Group
Crude, NGL = 0 OR 0.6100 Crude oils, JP4
Crude, NGL > 0 AND < 0.6100 NGLs, LPGs
Oil Water Emulsion = 0 OR 0.6100 Oil-water emulsion (Crd)
Oil Water Emulsion > 0 AND < 0.6100 Oil-water emulsion (NGL)
Due to roundoff error of numeric conversions, a Relative Density very close to
the cutoff value of 0.6100 may cause the module to assign the new product
group opposite to the one that was intended. Before upgrading, change the
Default Reference Density to a number significantly different from 0.6100, such
as 0.6110 (to target Crude) or 0.6090 (to target NGLs). You may change it back
to the correct value after the upgrade.