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8.3 VOLTAGE INPUT (NON RATIOMETRIC),
PROGRAMMING THE METER FOR A DESIRED DISPLAY
An easy way to program your unit is to follow the example and step
by step procedure below and just modify it for your exact require-
ments.
EXAMPLE: An end user wants to scale the meter for a 4000 PSI,
1-5 Vdc voltage output, pressure transducer. You want the meter to
display in tenths of a PSI from 0 to 4000.0 PSI. The pressure sensor
requires 12-30 Vdc excitation power.
The two most common methods of scaling, Method I scaling
without simulating a known load, and Method II scaling by simu-
lating known loads will be demonstrated. Sometimes end users
simulate known voltages instead of known physical standards
(pressures); this is covered in Method II. A third method is for a
unique case where you are scaling with a known load and you want
the display to have 3 or more decimal places. Method III is a little
complicated and should only be used, if you are looking for really
accurate results and you desire a display with 3 or more places to
the right of the decimal point.
A. Set the correct jumpers on the meter. (Refer to Section 6)
Install jumpers S3A, S3C and S4B on the main board.
8-15
8
Scaling to
Display
Engineering
Units
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