Section 4: Using the Model 9100: Resistance Function 4.7-5
Final Width = 215mm
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Section 3 Editing Tutorials.
4.7.4.1 Output, Offset and Deviation
The Output, Offset and Deviation values can be changed using 'Digit' and 'Direct' edit
facilities as described in Section 3. Selection of ∆% and ∆Ω is described in paras 4.7.3.3.
Offset Values
The effect of introducing a non-zero offset value is to change all set values of the output
by that of the offset. A positive offset will increase the output resistance value, and a
negative offset will decrease the output resistance value.
For example:
a. A set Output Value of 10kΩ with a +1kΩ Offset will be output as 11kΩ.
b. A set Output Value of 40Ω with a -10Ω Offset will be output as 30Ω.
c. A set Output Value of 100kΩ with a -300kΩ Offset will not be enabled.
Deviation Percentage Values
The effect of introducing a non-zero deviation value is to change all set values of the
output by the fraction expressed by the deviation. A positive deviation will increase, and
a negative deviation will reduce, the output resistance value.
For example:
a. An Output Value of 10kΩ set on the display, will be increased to 10.5kΩ by a +5%
Deviation.
b. A -10% Deviation will reduce an Output Value of 50MΩ set on the display, to
45MΩ.
Combined Deviation Percentage and Offset
Deviation and Offset values are combined by first applying the deviation, then the offset,
to the output value in the form y = (1 + m/100).x + c, where:
y is the terminal resistance; x is the set output resistance; m is the set deviation
percentage; c is the set offset resistance.
For example:
a. Set Values: Output = 10kΩ Deviation = +5% Offset = +3kΩ.
Terminal Resistance will be:
[(1 + 5/100) x 10kΩ] + (+3kΩ) = [1.05 x 10kΩ] +3kΩ = 13.5kΩ
b. Set Values: Output = 40Ω Deviation = -10% Offset = -30Ω.
Terminal Resistance will be:
[(1 - 10/100) x 40Ω] + (-30Ω)= [0.9 x 40Ω] - 30Ω =6Ω
4.7.4 Value Editing
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