User`s guide

7-44 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6

Measurement Units and Functions

QSCV Zero Offset Cancel

Table 7-27 Measurement Condition for the Offset Measurement

Parameter for the

offset measurement

Internal setup (not the setup on the screen)

Start voltage 0 V

Stop voltage Minimum value of the following values:

• |setup value of the QSCV MEAS VOLTAGE field| × 2

• |setup value of the START field|

• |setup value of the STOP field|

or 5 V (if the all listed above is greater than 5 V)

or 10 mV (if the all listed above is less than 10 mV)

Hold time setup value of the HOLD TIME field

Delay time 0 second

Integration time for

capacitance

measurement

a. If the integration time was too short for the offset measurement, the value

is automatically changed to the setup value of the QSCV field, and the off-

set measurement is executed again.

0.5 sec + |setup value of the STOP field|

1/4

sec

for the 10 pA or 100 pA range

80 msec for the 1 nA or 10 nA range

Integration time for

leakage current

measurement

b. The leakage current data is just used for the offset data calculation.

setup value of the LEAK field