MODULE #2 - SCALE BY KEY-IN METHOD
Select one of the four input ranges by placing the jumper in the appropriate
position at the rear of the unit before proceeding with Pro 2. (Refer to
“Selecting The Input Range” section.)
PROGRAM DECIMAL POINT POSITION
Select the desired decimal point position of the scaled display by pressing
either the “Up” or “Down” button.
Note: Whatever decimal point is selected will appear in succeeding
programming steps. Also, the “P” button must be pressed after each step to
enter the desired data and to proceed to the next step.
“dECPNt”<>“0”
“0.0”
“0.00”
“0.000”
“0.0000”
PROGRAM ROUNDING INCREMENT AND RIGHT HAND
DUMMY ZEROS
Rounding values other than one cause the scaled number to ‘round’ to the
nearest rounding increment selected (ie. rounding of ‘5’ causes ‘122’ to round
to ‘120’ and ‘123’ to round to ‘125’). If the process is inherently jittery, the
display value may be rounded to a higher value than one. If the range of the
process exceeds the required resolution, (ex. 0-10,000 PSI, but only 10 PSI
resolution required), a rounding increment of 10 will effectively make the
display more stable. This programming step is usually used in conjunction with
programmable digital filtering (Pro 4) to help stabilize display readings. (If
display stability appears to be a problem and the sacrifice in display resolution
is unacceptable, program higher levels of digital filtering or increase the level
of process dampening.) Rounding increments of 10, 20, 50, and 100 may also be
used to add “dummy zeros” to the scaled readings, as desired.
“round”<>“1”
“2”
“5”
“10”
“20”
“50”
“100”
At this stage a choice of either return to “Pro 0” or continue with scaling of
the display is offered.
“SCALE” < > “yES”
“NO”
If “YES” was selected for the previous step, the scaling procedure is started. In
order to scale the indicator, two signal level values and two display values that
correspond to the signal values must be known. These four values are directly
entered into the indicator. An example of a signal-display pair is listed below:
3.000 PSI @ 0.000 VDC AND 15.000 PSI @ 20.000 VDC
Scaling point #1 Scaling point #2
Note that reverse acting indication can be accomplished by either reversing
the two signal points or the display value points, but not both. If both are
reversed, then forward (normal) acting indication will occur. With this scaling
procedure, both the display values and signal values are keyed in.
KEY-IN DISPLAY VALUE FOR SCALING POINT #1
“dSP 1” < > “-99999” to “99999” (ex. 3.000 PSI)
KEY-IN SIGNAL VALUE FOR SCALING POINT #1
“INP 1” < > “+/-20000” (ex. 0)
KEY-IN DISPLAY VALUE FOR SCALING POINT #2
“dSP 2” < > “-99999” to “99999” (ex. 15.000 PSI)
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