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Picoamp Booster and Faraday Cage
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CHI200(B) Picoamp Booster and Faraday Cage
With CHI200(B) Picoamp Booster and Faraday Cage, the current down to a few picoamperes can be
readily measured. CHI200 is compatible with Model 600/A, 700/A series of instruments. CHI200B is compatible
with Model 600B and 700B series. When used with 700/A/B series bipotentiostat, Picoamp Booster will have effect
on the primary channel only.
The internal sensitivity of the 600B series is the same as the Picoamp Booster (1× 10-12 A/V). However, the
bias current of the 600B series input can be as high as 50 pA. The Picoamp Booster has lower bias current, and it
also bring the preamplifier close to the electrode that results in lower noise. It is also necessary to have Faraday
Cage in case of small current yet relatively fast measurements.
When the Picoamp Booster is connected and the sensitivity scale is at or below 1e-8 A/V, the Picoamp
Booster will be enabled. Otherwise, it will be disabled. The instruments automatically sense whether a Picoamp
Booster is connected. The enable/disable switching are also automatic.
The Picoamp Booster will be disabled techniques using automatic sensitivity switching, such as Tafel
plots, bulk electrolysis (BE), and ac impedance (IMP). It is not necessary to disconnect the Picoamp Booster to run
those techniques. However, galvanostatic techniques, such as chronopotentiometry (CP) and potentiometric
stripping analysis (PSA), the Picoamp Booster has to be disconnected.
Besides weak signal measurements, the Faraday cage is useful eliminating the electrical interference,
especially line frequency noise. In case the electrochemical cell picks up electrical noise from the environment, the
use of Faraday cage is strongly recommended.
이제품은 CHI사 potentiostat와 연결하여 사용하실수 있습니다
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