What is the Input Resistance of the 6487 when Zero Check is enabled?

问题：

答案：

Product(s) :
Picoammeter: 6487

Question : What is the Input Resistance of the 6487 when Zero Check is enabled?

Answer: A model 6517A was used to apply a 1 volt excitation to the 6487. The following values of resistance were measured:

RANGE INPUT RESISTANCE

20mA or 2mA 510 ohms

200uA or 20uA 40 kohm

2uA or 200nA 3.5 Mohm

20nA or 2nA 12 Mohm

此常见问题适用于：

产品系列： Keithley 6400 系列皮安表

产品：

常见问题 ID 71476

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RANGE	INPUT RESISTANCE
20mA or 2mA	510 ohms
200uA or 20uA	40 kohm
2uA or 200nA	3.5 Mohm
20nA or 2nA	12 Mohm