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Offset nulling consists of measuring the corresponding zero reading in a measurement path and subtracting this value from subsequent samples.
The way you connect the leads to obtain the zero reading depends upon the type of measurement you are taking.
To perform offset nulling, complete the following steps:
The subtraction operation can be performed programmatically with the ADE, and the NI-DMM Soft Front Panel (SFP) has an offset nulling feature.
For capacitance and inductance measurements, NI recommends using OPEN/SHORT compensation rather than offset nulling to remove offset errors. OPEN/SHORT compensation performs a fixture/cable characterization at the test frequency to compensate for offset and gain errors, while offset nulling only performs an arithmetic subtraction of the offset present in the fixture/cable.
For resistance measurements in the ranges ≤10 kΩ, you can enable offset compensated ohms, which removes offsets in the measurement path much better than offset nulling alone.