Idiomas disponibles
Idiomas disponibles
Making Relative Measurements (Null)
When making Null measurements, also called relative, each reading is the
difference between a stored (measured) null value and the input signal.
One possible application is to increase the accuracy of a resistance measurement
by nulling the test lead resistance. Nulling the leads is also particularly important
prior to making capacitance measurements.
1 To activate the relative mode, press the
Figure 3-4
2 To disable the Null function, press
For any measurement function, you can directly measure and store the null value
by pressing
(nulls the test lead resistance), or across a desired null value circuit.
– In resistance measurement, the clamp meter will read a non-zero value even
NOTE
– For DC voltage measurements, the thermal effect will influence the accuracy
Keysight U1190A Series User's Guide
the time, when Null is enabled, is stored as the reference value.
Null display
with the test leads open (nulls the test lead capacitance), shorted
when the two test leads are in direct contact because of the resistance of
these leads. Use the Null function to zero-adjust the display.
of the measurements. Short the test leads and press
value is stable to zero-adjust the display.
Clamp Meter Features
key. The measurement value at
again.
when the displayed
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