Math Operations; Null - DATATEC EDU34450A Guia Del Usuario

Math Operations

The table below shows the various math operations that can be used with each measurement function:
Math Operation
DCV

Null

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Scaling ●
Statistics ●
Limits ●
– Only one math operation can be enabled at a time.
– When the secondary display is enabled, selecting a math operation will turn off the secondary display.
– Changing the range and resolution is allowed for all math operations.
– You can edit the reference/offset/limit values used for the Null, Scaling, and Limits math operations.
– For remote operation, refer to the CALCulate Subsystem in the EDU34450A Programming Guide.
Null
When making null measurements, also called relative, each reading is the difference between a stored null offset
value and the input signal. One possible application is to increase the accuracy of a 2-wire resistance measurement
by nulling the test lead resistance. Nulling the leads is also particularly important prior to making capacitance
measurements. The formula used for calculating null measurements is:
Null Measurement Display = Reading – Null Offset Value
– The null offset value is adjustable. You can set it to any value between 0 and ±120% of the highest range, for the
present function.
– For resistance measurements, the instrument will read a non-zero value even when the two test leads are in direct
contact because of the resistance of these leads. Short the test leads and press [Null] once the displayed value is
stable to zero-adjust the display.
– For DC voltage measurements, the thermal effect will influence the accuracy. Short the test leads and press [Null]
once the displayed value is stable to zero-adjust the display.
Front Panel Operations
Press [Null] to enable the Null operation. The reading is captured as the null offset value.
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ACV DCI ACI
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Measurement Function
2RES 4RES FREQ
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DIODE CONT TEMP
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Keysight EDU34450A User's Guide
CAP
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