6247G/6247C DC Voltage Current Source/Monitor Operation Manual
5.2.9 Calculation Functions
5-50
5.2.9
Calculation Functions
5.2.9.1
NULL Calculation
NULL calculation is used to cancel leak current or offset value.
a.
Calculation expression
R = X - Xnull
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
6) Null Value
on the menu screen.
The setting range is between 0 to
9. 26.
NULL calculation
Measurement
Xnull
Output data
