User`s guide

Agilent EasyEXPERT User’s Guide Vol. 1, Edition 1 4- 43
Function Details
Current Offset Cancel
Current Offset Cancel
This function subtracts the offset current from the current measurement raw data,
and returns the result as the measurement data. This function is used to compensate
the error factor (offset current) caused by the measurement path such as the
measurement cables, manipulators, or probe card.
The offset cancel is not available for measurement over 100 nA range. For 10 nA
range measurement, the offset cancel is performed by using the 1 nA range offset
value. For measurement by a range less than 10 nA, the offset value measured by
each range is used. See
Table 4-7 for the effective measurement range, the allowable
offset value, and the module type of the measurement channel.
Enabling offset
cancel function
You can perform the offset current measurement and enable the offset cancel
function as shown below.
1. Click the Calibration button on the main screen to open the Calibration window.
See
“Calibration” on page 1-58.
2. Specify the channels to perform the offset current measurement on the SMU
Zero Cancel tab screen of the Calibration window. To specify the channel, check
the check box to the left of the Name field.
3. To enable the 1 pA range offset current measurement of SMU+ASU, check the
Full Range check box. Can be set for each channel.
4. Set the integration time for the offset measurement to the Integration Time field.
Available value: 1 PLC (power line cycle) to 100 PLC, initial setting 16 PLC.
Can be set for each channel.
Set the value longer than the integration time for the measurement of the device
under test. Otherwise, the offset cancel will not be performed.
5. Click the Measure... button. A dialog box is opened.
Follow the instruction of the dialog box, and perform the offset measurement.
After the measurement, the offset cancel function is automatically enabled.
Open the measurement terminals at the cable end of the device side during the
offset current measurement.