Relative - Keithley 2002 Getting Started Manual

2-10 Measurement Options

Relative

Rel subtracts a reference value from actual readings. When rel is enabled, the instrument uses
the present reading as a relative value. Subsequent readings will be the difference between the
actual input value and the rel value.
Actual Input – Reference = Displayed Reading
Thus, when you perform a zero correction for DCV, Ω 2, and Ω 4 measurements by enabling
REL, the displayed offset becomes the reference value. Subtracting the offset from the actual
input zeroes the display.
The rel (relative) operation is enabled by pressing the REL key (REL annunciator turns on).
Pressing REL a second time disables rel. You can also enter and enable a rel value from the
CONFIG-REL display.
A rel value can be established for each measurement function. The state and value of rel for
each measurement function are saved when changing functions. Once a rel value is established
for a measurement function, the value is the same for all ranges.
Configuring Rel
To check or change a rel value for a measurement function, perform the following steps:
1.
2.
3.
Select the desired measurement function.
Press the CONFIG key and then the REL key to display the present rel value.
Use the cursor keys ( and
ENTER. The instrument will return to the normal display state with rel enabled.
) and the RANGE keys to change the rel value and press