Keysight U1271A - Using Smart Ω for Resistance Measurements (U1272 A Only)

Making Measurements 2
Using Smart Ω for Resistance Measurements (U1272A only)
U1271A/U1272A User’s Guide 77
Using Smart Ω for Resistance Measurements (U1272A only)
Smart Ω (offset compensation) removes unexpected DC
voltages within instrument, at the input or at the circuit
being measured, which will add to resistance measurement
errors. The bias voltage or leakage current is shown on the
secondary display.
Using the offset compensation method, the multimeter takes
the difference between two resistance measurements when
two different test currents are applied to determine if there
are any offset voltages in the input circuitry. The resultant
displayed measurement corrects this offset, giving a more
accurate resistance measurement.
1 To use the Smart Ω function, rotate the multimeter’s
rotary switch to and press until is
shown on the display.
2 Probe the test points and read the display. The resistance
measurement and the bias voltage measurement is shown
in the primary and secondary displays respectively.
Press to switch between the leakage (μA) and bias
(mV) display.
NOTE
The Smart Ω is applicable for the 30 Ω, 300 Ω, 3 kΩ, 30 kΩ, and 300 kΩ
resistance range only. The maximum correctable offset/bias voltage is
+50 mV/–30 mV for the 30 Ω range and +1.0 V/–0.2 V for the 300 Ω, 3 kΩ,
30 kΩ, and 300 kΩ ranges.
If the DC voltage on the resistor is over the maximum correctable
offset/bias voltage, is shown on the secondary display.
Smart
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