Introduction
Low current measurement is a key performance metric for picoammeters and
electrometers, which often specify atto-ampere (aA) level current measure-
ment resolution. In addition to ultra-low current measurement capability, it is
smooth-out noisy data and basic measurement data evaluation tools to simplify
debugging.
The four key capabilities necessary to successfully make sensitive low current
measurements are listed below:
1. Femto-ampere current measurement capability.
cancelation.
domain graphs, etc.
The Keysight B2981A/B2983A Femto/Picoammeter and B2985A/B2987A Elec-
trometer/High Resistance Meter provide both superior performance of 10 aA
the features listed above.
This technical overview highlights the B2980A Series ammeter current mea-
Note: The B2983A and B2987A have an internal rechargeable battery that allows them to
operate without being connected to AC power.
Important words used in
the document:
– Low-current metric system
– pico (p)= 10
-12
– femto (f)= 10
-15
– atto (a)= 10
-18
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