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8
Scaling to
Display
Engineering
Units
2. Now you are in the run mode and the transducer is connected to
the meter. Simulate two loads on the transducer and record the
meter display as "INPUT1" and "INPUT2" and record what each
of these readings should display ("READ 1" and "READ 2") on a
piece of scrap paper or in the spaces provided below, these
numbers will be the INPUT values entered in the "IN.SC.OF"
scaling.
Normally the two points that are calibrated are the no load
condition and 3/4 full scale. However, you may use any two
measurements.
"INPUT1"
"READ 1"
Assume that you simulate no load and the display indicates "20054.3",
and when you simulate 2.0000 inches of water, the display
indicates "66675.6" .
The following data will now be entered into the 2-point scaling
"IN.SC.OF" method.
"INPUT1":
20054.3
"INPUT2":
66675.6
Ignore the decimal point position for the READ values. Just note
how many zero's (or places to the right of the decimal) you need.
In this example there were 4 decimal places needed and there are
4 zeros after the "2" (in the "READ 2" value).
You must alter the "RDG SC" factor as follows. Note that the
decimal point above in the "READ 1" and "READ 2" values is not
in the correct position. You need to move it 3 places to the left to
make it correct.
By looking at Table 8-4, you can see that a value of 0.00100 must
be entered for a new "RDG SC" value.
8-38
"INPUT2"
"READ 2"
"READ 1":
00000.0
"READ 2":
02000.0
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