Measurement Considerations; Insulating Material; Leakage Current On Connection Parts; Humidity And Temperature - Keysight B2980B Series User Manual

How to Perform Measurement

Measurement Considerations

Measurement Considerations
This section describes some considerations for performing accurate and reliable
measurements.
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Insulating Material

The need to use high-resistance insulation materials in connection parts, such as
cables, adapters, and others, is essential to ensure the reliability of ultra-low
current measurements. Poor insulation will allow greater leakage current.

Leakage Current on Connection Parts

Contaminants such as moisture or ionic chemicals can cause electrochemical
effects that degrade insulation resistance. In some cases, ionic chemicals create a
battery effect that sources offset current. This effect is not stable and will be a
major obstacle to obtaining reliable low-current measurements. It is important to
keep the surface of insulation material clean.

Humidity and Temperature

Water and water vapor can easily cause electrochemical effects. It is effective to
maintain constant low humidity in the measurement environment in order to
prevent the occurrence of an electrochemical effect. Temperature changes can
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"Insulating Material"
"Leakage Current on Connection Parts"
"Humidity and Temperature"
"Offset"
"Cable Noise"
"External Noise"
"Dielectric Absorption"
"Capacitive Coupling"
"Light"
Keysight B2980B User's Guide, Edition 1