6240B DC Voltage Current Source/Monitor Operation Manual
5.2.10 Calculation Functions
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5.2.10
Calculation Functions
5.2.10.1
NULL Calculation
NULL calculation is used to cancel leak current or offset value.
a.
Calculation expression
R = X - Xnull
R:
Calculation result
X:
Present measurement data
Xnull: NULL data
b. Timing to acquire NULL value (Xnull)
•
After the NULL calculation is set to ON, the next measured data item is acquired as NULL
value.
•
The timing of NULL value acquisition in DC operation is shown below.
Figure 5-14 NULL Calculation Timing
•
The NULL indicator goes ON when the NULL calculation is ON.
•
The NULL value is rewritten when the NULL calculation switches from OFF to ON or when
the NULL calculation is initialized.
•
If the measured value is over-range data and the NULL calculation is turned ON, the display
shows Over Range. The first data item after the Over Range is released becomes the NULL
value.
•
If the NULL calculation result is over the full scale of the present measurement range, it dis-
plays up to the double value of the full scale.
•
The NULL calculation is turned OFF by changing the measurement function or executing the
*RST command.
•
The NULL value can be changed while the NULL calculation is ON.
Select and set items,
I) CONST
and
Null Value
on the menu screen.
The setting range is between 0 and
999.999E + 24.
NULL calculation
Measurement
Xnull
Output data
