RIGOL DM3068 - Manual (Page 86)

RIGOL Chapter 2 Front Panel Operations
User’s Guide for DM3068 2-44
Offset Compensation
OC (Offset Comp) applies to resistance measurements in the range of 200 Ω, 2 kΩ
and 20 kΩ. It eliminates the impact of small dc offset from test lead on
measurement result.
In 2WR or 4WR measurement, when the range is set to 200 Ω, 2 kΩ or 20 kΩ,
press
 OC to enter the following interface.
 ON: the multimeter adds two different currents onto the measured resistance
and measures the variation of the voltage between both ends of the
resistance under the two different currents, and then divides the voltage
variation by the current variation to obtain the value of the measured
resistance.
 OFF: the multimeter does not execute offset compensation.
Tip
The offset compensation and auto zero are mutually exclusive. The used auto zero
function will be disabled automatically once you turn on the offset compensation,
and vice versa.