SIREC D Display Recorder 7ND4000

Programming
Scale: 0|__|__|2_|__|4_|__|6_|__|8_|__|__|__|9_|__|__|__|10
B. Scale Selection - When entering the SCALE
menu option, the user will be presented with a popup
dialog box window indicating which of the 16
scales is to be programmed. Select the scale to
program by using the Up (↑) or Down (↓) Arrow
Keys and then pressing ENTER to proceed or EXIT
to quit. Pressing ENTER will provide the following
programming choices for the SCALE:
• Scale type
• Scale ends
• Scale grid
• Scale units
C. Programming Scales - Use the following
paragraphs and Figures 4-7, 4-8, and 4-9 to program
scales into the Recorder:
1. Scale Type - The scale type can be LINEAR or
LOG. For linear scales, the point data is interpolated
linearly across the defined segments. For
log scales, the log 10 of the data is used in the
interpolation. The following steps and Figure 4-7
are used to guide the user in programming Scale
Type:
4-16
0 ------ 1 per division ---- 50 --- 0.25 per division --- 100%
a. At the “Scale type” menu item, press ENTER
and the scale type menu items will be displayed.
b. Use the Up (↑) or Down (↓) Arrow Keys to
scroll the highlight bar to the desired selection,
type=LIN or type= LOG. Press ENTER when
the desired selection is highlighted.
c. Press EXIT once to return to the “Scale type”
menu item.
2. Scale Ends - A low, mid and high end point is
programmed for each scale. The low and high end
points indicate the values at the left and right margins
of the chart and the bottom-most and topmost
segments of the bargraph display. The mid
point defines the center of the chart and need not
be the halfway between the low and high values
of the scale. If the point data is outside the range
between the low and high end-points, the pen is
positioned in one of the chart ends and the bargraph
is all-on or all-off. In the case of LOG
scales, these end points are programmed in exponents
with an implicit base 10 in the range 10 -25
to 10 25 . The graph will be logarithmic.
Figure 4-9 Scale Example
The graph can thus be made to amplify data by
offsetting the midpoint for example, if the full scale
is zero to 10, and low = 0, high = 10 and mid = 8,
half the display will show 0 to 8 and the other half
will show 8 to 10. Thus the upper half of the display
represents only 20% of the chart and will
have four times the resolution of the lower half of
the display as shown below: The Linear Type of
scale asks for the number of decimal places. To
program a linear or log scale ends, follow the instructions
below and refer to Figure 4-7:
a. Starting Programming - From the “Scale
ends” menu item, press ENTER. If LINear Scale
Type was chosen, the screen will display a popup
dialog box with “Places? X” in the text box.
b. Places (Linear Only) - Use the Up (↑) or
Down (↓) Arrow Keys to scroll the number in the
text box to the desired decimal places (3 Places
max.). When the correct number of places is
displayed, press ENTER.
c. Low End or Low End Exponent - The next
pop-up dialog box asks for the Low endpoint or
Low Exponent endpoint and is displayed as “lo
�_0.000 �” for Linear and “lo exp �_0�” for
Log. Use the numeric keypad to program the
numbers and the Left (→) and Right (←) Arrow
Keys to move in the programming window, to
program the desired low end of scale. When the
desired low end of scale is displayed in the window,
press the ENTER button.
d. Mid Scale or Mid Exponent - After programming
Low End of Scale, the Mid Scale
must be programmed.
A pop-up dialog box asks for the Mid point or
Mid Exponent of the scale and is displayed as
“mid �_0.000 �” for Linear and “mid exp
�_0�” for Log. Use the numeric keypad to
program the numbers and the Left (→) and
Right (←) Arrow Keys to move in the programming
window, to program the desired mid point
of scale. When the desired mid point of scale is
displayed in the window, press the ENTER button.
e. Hi End or Hi End Exponent - The next popup
dialog box asks for the Hi endpoint or Hi Exponent
endpoint and is displayed as “hi
�_0.000 �” for Linear and “hi exp �_0�” for
Log. Use the numeric keypad to program the
numbers and the Left (→) and Right (←) Arrow
Siemens AG C79000-G7374-C211-01
SIREC D Manual