Omega RD-MV100 Series, User Manual

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5-12
5. Upper and lower limits of scale
Set the upper and lower limits of the scale.
Pressing the [Input] soft key displays a window used to enter a numerical value.
Enter a value in the allowed range and press the DISP/ENTER key. For the
procedures related to entering numerical values, see “Entering Numbers” on
page 3-21.
• Allowed range : –30000 to 30000
• Decimal position :
The decimal can be set in the following positions : “
.
”
“
.
” “
.
” “
.
” “ ”
• The decimal position is determined by the scale lower limit setting.
Note
• Scale lower limit and scale upper limit cannot be set to the same value.
• The recorder converts the measured data within a value span derived by removing the
decimal from the scaling upper and lower limits. In other words, conversion is performed by
using a span of 10 if the scale setting is –5 to 5, and 100 if the scale setting is –5.0 to 5.0.
The resolution of the value derived by using a span of 10 is coarser than the value derived
using a span of 100. Because the display becomes rough, set this value so that it is greater
than 100.
6. Unit
Set the unit.
Pressing the [Input] soft key displays a window used to enter a character string.
Enter the unit (up to 6 alphanumeric characters) and press the DISP/ENTER
key. For the procedures related to entering character strings, see “Entering
Characters” on page 3-22.
Confirming operation
To confirm the new settings, press the DISP/ENTER key.
To cancel the new settings, press the ESC key. A window appears for you to confirm the
cancellation. Select “YES” using the arrow keys and press the DISP/ENTER key.
Explanation
For the range, and measurable range, see section 5.1, “Voltage Input Setting.”
Computing equation
The RD-MV100 uses the following square-root computation :
Using the following definitions :
• V min : Lower limit of span
• V max : Upper limit of span
• F min : Lower limit of scale
• F max : Upper limit of scale
• V x : Input voltage
• F x : Scaling value
V – V
V – V
+ F
x
max min
max F = (F – F ) x min min
min
When the value inside the square root is negative,
when Fmin < Fmax, Fx = negative overflow “– ”
when Fmin > Fmax, Fx = positive overflow “+ ”
5.6 Square Root Computation Setting