Honeywell Fusion4 MSC-L User Manual

Operation - LPG Loading Application Overview
Part No.: 4418309_Rev09 Fusion4 MSC-L
Honeywell Installation & Operation Manual 5 - 59
FIGURE 5-24 LPG running screen
NOTE: If external “back pressure” regulator valve is to be
used, configure “Vapour pressure source” to
“Externally controlled” and “Vapour pressure margin”
to match the setting of the external pressure
regulator valve. In this case Fusion4 MSC-L back
pressure control will be disabled and “Vapour
pressure margin” (together with delivery line
pressure) will be used to derive vapour pressure.
When Fusion4 MSC-L is configured to perform back pressure control,
“Vapour pressure margin” functions as a safety margin, while “Pressure
control range factor” parameter is used to adjust “Maximum limit point”
and provides means to adjust range where “back pressure control” is
active.
The “Minimum limit point” is a calculated pressure value where it is
considered that the product may start vaporizing. The flow must
completely stop at this pressure level:
Minimum limit point = 1.0 * Vapour pressure (measured) + Vapour
pressure margin
Minimum limit point = 1.1 * Vapour pressure (calculated)+ Vapour
pressure margin
NOTE: The additional 10% ‘safety’ margin applies in the
case of ‘Calculated’ vapour pressure to cater for
potential errors disclosed in MPMS 11.2.5 standard
(used for deriving vapour pressure).

Honeywell Fusion4 MSC-L Specifications

General

Brand	Honeywell
Model	Fusion4 MSC-L
Category	Desktop
Language	English