ProtEX PD8-6080/PD8-6081 Explosion-Proof Modbus
®
Scanner Instruction Manual
38
Scaling the PV Display Values (
sCale
)
The data that the scanner receives can be scaled to display in engineering units. Input 1 must be less than
Input 2, Input 2 must be less than Input 3, etc. (known as monotonic values). Press
Enter
to save the
changes or
Menu
to exit without saving. When the Linear function is selected for PV1 & PV2, up to 32
points may be programmed to handle non-linear data. Only two points are available for all other PVs and
for either the Square Root or Programmable Exponent functions. Round Horizontal Tanks are scaled using
the length and diameter of the tank.
Scale Menu
The display will show
Error
if the scaling or calibration process is unsuccessful. Undesired operation may
occur if the error is not corrected. Correct the error by either changing one of the inputs in question or
changing the number of points to exclude an erroneous input point.
Note 1: For Feet & Inches Display format, the display values will be in the format
99
FT
11
IN
15
/16th
or 8
th
.
Make the left digit for inches and 16
th
blank if the value is less than 10. Example:
50 Feet, 9
Inches, and 8/16
will be displayed as
50
FT
_9
IN
_8
16th
instead of
50
FT
09
IN
08
/16th
.
Note 2: Scaling Short and Long input values (input 1, input 2, etc.) should be done without the decimal
point.
Multi-Point Linearization (
Linear
)
The scanner is set up at the factory for 2-point linear scaling. Up to 32 linearization points may be selected
for PV1 and PV2. All other PVs have two linearization points available. See page 63 for details.
