Reciprocal (1/X) - Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User's Manual

Reciprocal (1/X)

The reciprocal of a reading is displayed when the reciprocal (1/X) math function is
enabled:
Reciprocal = 1/X
where: X is the normal input reading
The displayed units designator for reciprocal readings is "R." This units designator cannot
be changed.
Example — Assume the normal displayed reading is 002.5000Ω . The reciprocal of resis-
tance is conductance. When the reciprocal math function is enabled, the following conduc-
tance reading will be displayed:
0.400000 R
Reciprocal (1/X) configuration
1.
2.
3.
NOTE
Press SHIFT and then MATH to display the math menu.
Δ
Press the RANGE or
annunciator will turn on, and the result of the calculation will be displayed. Note
that the calculation will be applied to all measurement functions.
To disable 1/X, again press SHIFT and then MATH. The MATH annunciator will
turn off.
The result of the 1/X calculation may be displayed in exponential notation. For
example, a displayed reading of +2.500E+03 R is equivalent to 2500 R
(2.5K R).
When using Rel, the rel'ed reading of the input signal is used by the 1/X
calculation.
Rel, Math, Ratio, Channel Average, dB
∇
key to display "1/X," and press ENTER. The MATH
5-11