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8
METHOD I: SCALING WITHOUT SIMULATING A KNOWN LOAD.
Scaling to
Display
Engineering
Units
C. The unit comes with all lockout bytes set in the unlocked
position("0"). Refer to Section 9.1 for information on lockout
bytes.
If the unit has been program previously please make sure that at
least the following lockout codes are unlocked. If they are not
unlocked you will not be able to scale the meter.
MENU
SUB MENU
"L1CNF"
L1C.7=0, L1C.8=0
"L2CNF"
All sub menus must be unlocked "0"
Scroll to the desired menu by pressing the 'MENU' button. You
enter a submenu by pressing the 'MIN' button. You select "0" or "1"
by pressing the 'MAX' button. Always press the 'MENU' button
when leaving a submenu to store the values or parameters you
entered.
All of the following steps are accomplished by using the front panel
buttons.
1. Scale the instrument by entering only 3 parameters. The 3
parameters are "RDG SC" (Reading Scale), "RDG OF" (Reading
Offset), and "DEC PT" (Decimal Point).
Calculate your "RDG SC" (Reading Scale) using the following
formula:
RDG SC= display span/ ((sensors span normally 16 mA) (5000))
RDG SC= 5000/(16 x 5000) = 0.06250
Where: display span= 5000 – 0 = 5000
Sensor's output span= 20 mA – 4 mA = 16 mA
Pressing the 'MENU' button will take you through all the different
menus listed below. When you wish to enter a menu, to the
submenu 1 stage, press the 'MIN' button. To make a selection, in
submenu 1, press the 'MAX' button. If the submenu has more than
one item to select use the 'MIN' button to scroll to the next item of
choice and again use the 'MAX' button to make your selection.
8-30
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