Agilent Technologies B1500A Betriebsanweisung PDF herunterladen (Seite 439)

100

101

Agilent B1500 User’s Guide, Edition 7 7- 57

Function Details

SMU Measurement Time

Measurement time depends on integration time, measurement range, and other

measurement conditions, and can be expressed by the following formula:

Measurement time = Integration

time + Overhead time

Integration time is the time required for measurement, and does n

ot include such

factors as range changing or data compensation, which would be the overhead time.

Integration Time

Integration time is the time required to get measurement data. For accurate and

reliable measurement, integration time should be increased. Integration time can be

set for each type of A/D converter (ADC) used by the measurement channel.

• High-speed ADC

You can adjust the number of averaging samples instead

of the integration time.

For high speed measurement. Installed in each measurement module.

• High-resolution ADC

You can adjust the integration time directly. For high accuracy and high

resolution measurement. This ADC is mounted on the mainframe, and used by

the multiple modules alternately.

To set the integration time or the number of averaging samples, select the mode and

set the valu

e as shown in Table 7-8.

ADC Zero

Fun

ction

The ADC

zero function is available for the high-resolution A/D converter (ADC)

and not available for the high-speed ADC. This function measures the internal offset

of the high-resolution ADC and compensates it automatically. The measurement

data displayed on the LCD will be the data after compensation.

NOTE This function is especially effective for the low voltage measurement. Disable the

function in cases where measurement speed is more important than measurement

accuracy. This approximately halves integration time.

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