Aalborg Vortex Insertion - Manual (Page 30)

NOTE: Program the Measuring Units first because later menus may be
based on the units selected.
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Use the Measuring Units Menu to configure the flow meter with the desired units
of measurement. These are global settings and determine what appears on all
process information screens and data log records. Units should be selected to
meet your particular metering needs.
The instantaneous flow rate may be simultaneously displayed in Volumetric and
Mass engineering units. In addition to conventional flow units user defined flow
engineering units may be configured for Volumetric and Mass flow units. Before
using Volumetric User defined flow unit make sure proper conversion factor of the
new unit with respect to one liter is set (the default entry is 1.00 Liter). Before
using Mass User defined flow unit make sure proper conversion factor of the new
unit with respect to one gram is set (the default entry is 1.00 gram) Also proper
time base values for both User Defined Units have to be set. The following selec-
tions are available: 1 second, 60 seconds (1 minute), 3600 seconds (1 Hour),
86400 seconds (1 Day). The default entry is 60 seconds.
The Volumetric flow rate for Gases may be shown with following units conditions:
Standard, Normal, and Actual. The temperature and pressure for Standard and
Normal conditions can be programmed in the Flowing Fluid menu (see Paragraph
5.3.9.1). By default Standard conditions are: 70°F and 14.7 PSIA, Normal condi-
tions are 0 °C and 101.3 KPa.
For flow meters with T/P hardware installed the actual process temperature and
pressure derived from corresponding sensors. For flow meters without T/P hard-
ware the actual process temperature and pressure should be preset in the Flowing
Fluid menu (see Paragraph 5.3.9.1).
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NOTE: Your flow meter is pre-programmed at the factory for your
application’s process fluid and T/P conditions and does not require any
reprogramming unless your process fluid or T/P conditions are
changed.
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NOTE: If Gas is selected as flowing fluid, when Standard Volumetric
units are selected the prefix S will precede engineering units name on
the PI screens (for example: Slitr/min). When Normal Volumetric units
are selected the prefix N will precede engineering units name on the PI
screens (for example: Nlitr/min). For Actual Volumetric units there will
be no prefix in front of engineering unit name (for example: litr/min).
Flow Units Conditions settings only applicable for Volumetric Flow
units. For Liquids the Flow Units conditions are always Actual.
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