Null Measurement - Keysight 34450A Guia Del Usuario

Null measurement

When making null measurements, also called relative measurement, each reading
is the difference between a stored null value and the input signal.
For example, this feature can be used to make more accurate resistance
measurements by nulling the test lead resistance.
Before performing null measurement, eliminate offset errors associated with test
lead resistance by following the steps below:
Press to enable null measurement
Keysight 34450A User's Guide
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