Warning Messages (Warning) - Keysight E4981A User Manual

Error Messages

Warning Messages (WARNING)

Warning Messages (WARNING)
Warning messages are displayed to warn users. They are displayed in the lower
row of the display of the E4981A. You cannot read them out using the GPIB
command.
WARNING: Need corr meas
When the OPEN correction, SHORT correction or LOAD correction is ON, this is
displayed when you change the setup of the cable length or measurement
frequency shift (1 MHz). In this case, the OPEN correction, SHORT correction
and LOAD correction are automatically turned OFF.
WARNING: Need load meas
This is displayed when you turn ON the LOAD correction from the front panel
although the setups of the cable length and measurement frequency shift (1
MHz) differ from those when measuring/setting up the LOAD correction data.
In this case, the LOAD correction is turned ON, but you need to measure the
LOAD correction data again for accurate measurement.
WARNING: Need open meas
This is displayed when you turn ON the OPEN correction from the front panel
although the setups of the cable length and measurement frequency shift (1
MHz) differ from those when measuring/setting up the OPEN correction data.
In this case, the OPEN correction is turned ON, but you need to measure the
OPEN correction data again for accurate measurement.
WARNING: Need short meas
This is displayed when you turn ON the SHORT correction from the front panel
although the setups of the cable length and measurement frequency shift (1
MHz) differ from those when measuring/setting up the SHORT correction data.
In this case, the SHORT correction is turned ON, but you need to measure the
SHORT correction data again for accurate measurement.
WARNING: Out of limit
This is displayed if the correction data is out of the valid range when measuring
the correction data. The valid range for each type of correction is as follows.
Type of correction
In the above table, Y is the measured admittance value, Z is the measured
impedance value, and Zref is the LOAD correction standard definition value.
Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter
Valid range
OPEN correction |Y| < 20 µS
SHORT correction |Z| < 20 Ω
LOAD correction |Zref| × 0.9 < |Z| < |Zref| × 1.1
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