Mx+B - Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User's Manual

mX+b

This math operation lets you manipulate normal display readings (X) mathematically
according to the following calculation.
Y = mX + b
where:
NOTE
mX+b configuration
1.
2.
3.
4.
5.
6.
7.
8.
9.
X is the normal display reading.
m and b are the user-entered constants for scale factor and offset.
Y is the displayed result.
When using Rel, the rel'ed reading of the input signal is used by the mX+b
calculation.
Press SHIFT and then MATH to display the math menu.
Δ
Press the RANGE and
the present scale factor:
Δ
M: +1.000000
Key in the scale factor value. The
∇
and keys increment/decrement the digit value. To change range, place the cursor
on the multiplier and use the
and M = × 1,000,000). With the cursor on the polarity sign, the
gle polarity.
Press ENTER to enter the M value and display the offset (b) value:
b: +00.00000 m
Key in the offset value.
Press ENTER to enter the b value and display the one-character units designator:
UNITS: X
Use the cursor keys and the
The character can be any letter in the alphabet (A through Z), the degree symbol
(°), or the ohms symbol (Ω).
Press ENTER. The MATH annunciator will turn on, and the result of the calcula-
tion will be displayed. Note that the calculation will be applied to all measurement
functions.
To disable mX+b, again press SHIFT and then MATH. The MATH annunciator
will turn off.
Rel, Math, Ratio, Channel Average, dB
∇
key to display "mX+b", and press ENTER to display
(factory default)
and keys control cursor position, and the
Δ ∇
keys (m = × 0.001,
and
(factory default)
(factory default)
Δ ∇
or key if you wish to change the units designator.
5-9
Δ
Δ
= × 1, K = × 1000,
Δ ∇
and keys tog-