CiDRA SONARtrac HD VF-100 - Manual (Page 86)

Copyright © 2006 CiDRA Corporation Page 10-11
20638-02 Rev 01
For example, a 0-100 psig pressure transducer with a 4-20 mA output
will have a –25 offset.
y=mx+b
100 psi = (100psi / 16mA) x (20mA) +b
100 psi – 125 psi = b
-25 psi = b = ‘Offset’
10.1.4 Customize Menu
The Customize menu is used to configure the transmitter to meet user
needs for local display of flow parameters.
•
Display
The display parameters are used to customize the displayed units and
appearance of the display.
- ‘Line 1’ and ‘Line 2’ adjustments set the outputs of those lines to
‘Totalizer’, ’Flow Rate %’, ‘Flow Rate’, and ‘Blank’.
- ‘Contrast’ is used to adjust the screen appearance due to lighting
conditions. Normally this is set to 170.
•
Sensor Setup
- ‘State’ – used to turn individual sensors ‘On’ or ‘Off’. Normal
operating condition is with all sensors set to ‘On’.
•
Flow Units
The menu selectable units for ‘Volume’ are ‘gal’ (gallons), ‘l’ (liters),
‘m
3‘, (cubic meters), ‘user’ (user defined), ‘iga’ (imperial gallons), ‘ft 3‘
(cubic feet), ‘ft’ (feet), ‘m’ (meter).
The menu selectable units for ‘Time’ are ‘s’ (second), ‘m’ (minute), ‘h’
(hour), ‘d’ (day), ‘user’ (user defined).
In both the ‘Volume’ and ‘Time’ selections custom user labels can be
input by the user by selecting ‘user’ from the menu. The user defined
labels are then input using the ‘User Volume / Time’, ‘Base’, and
‘Scale Factors’.
•
Flow Cutoff Range
The flow cutoff range ‘Low End’ and ‘High End’ are used to set the
low end and high end, respectively, of flow rates that will be displayed
on the transmitter. Flow under or over the set points will be displayed
as ‘<Min Flow’, ‘>Max Flow’, as appropriate.