Avoiding Mistakes Related To Work In Obtaining Correction Data; Using Warning Messages - Keysight E4981A User Manual

Preparation for Accurate Measurement (Executing Correction)

Avoiding Mistakes Related to Work in Obtaining Correction Data

Avoiding Mistakes Related to Work in Obtaining Correction Data
To avoid simple work-related mistakes in measuring the data for
OPEN/SHORT/LOAD correction (for example, setting up the OPEN state and
SHORT state inversely), it is important to confirm that the measured data is
correct.

Using warning messages

If the measured data is out of the valid range shown in
measuring the data for OPEN/SHORT/LOAD correction, the warning message
"Out of limit" appears, which allows you to detect an error of the measured
data.
The valid ranges are fixed and cannot be changed. Even after the warning
message is displayed, the correction data is used as is.
Table 5-3 Valid ranges of correction data
In
impedance value, and Zref is the definition value of the standard for the LOAD
correction.
112
Type of correction
OPEN correction
SHORT correction
LOAD correction
Table 5-3, Y is the measured admittance value, Z is the measured
|Zref| × 0.9 < |Z| | |Zref| × 1.1
Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter
Table 5-3 when
Valid range
|Y| < 20 µS
|Z| < 20 Ω