Aalborg Vortex Insertion - Manual (Page 42)

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5.3.6.1 Submenu L2 Analog 4-20mA Menus
Vortex Flow Meters are equipped with two channels programmable analog 4-20
mA outputs. Each channel can be individually assigned to one of the following
process variables: Volumetric Flow, Mass Flow, Temperature*, Pressure*. By
default channel #1 is set to Volumetric Flow and channel #2 is set for Mass flow.
For each channel 4 mA and 20 mA points, which define the flow meter output
range, can be preset to maximize resolution of analog output. The meter is most
accurate when operated within the expected flow ranges for your application.
Setting the range to the limits of expected readings will maximize flow meter per-
formance.
When adjusting 4-20mA limits, the value of the limits have to be entered in cur-
rently selected (global) for particular process variable engineering units.
5.3.6.2 Submenu L2 Digital Optical Outputs Menus
Two sets of optically isolated digital outputs are provided to actuate user supplied
equipment. These are programmable via digital interface or LCD/Keypad such
that the outputs can be made to switch when a specified event occurs (e.g. when
a low or high flow alarm limit is exceeded or when the totalizer reaches a speci-
fied value) or may be directly controlled by user.
The user can configure each optical output action from 14 different options:
- Disabled: No Action (output is not assigned to any events and not energized)
- Low Flow Alarm
- High Flow Alarm
- Range between H&L Flow alarm settings
- Totalizer #1 reading exceed set limit
- Totalizer #2 reading exceed set limit
- Low Temperature alarm (*T/P option only)
- High Temperature alarm (*T/P option only)
- Range between High and Low Temperature alarm (*T/P option only)
- Low Pressure alarm (*T/P option only)
- High Pressure alarm (*T/P option only)
- Range between High and Low Pressure alarm (*T/P option only)
NOTE: Your Vortex Flow Meter was calibrated at the factory for the
specified fluid and full scale flow range: 4mA – 0%F.S. and 20mA –
100%F.S. (see device’s label or calibration data sheet). There is no need
to adjust the Flow Meter 4-20 mA range limits settings, unless
adjustment for specific range is needed.
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