Keithley 6430 User Manual

Performance Verification 18-9
The “real” compliance condition can occur when the compliance setting is less than the
highest possible reading of the measurement range. When in compliance, the source output
clamps at the displayed compliance value. For example, if the compliance voltage is set to 1V
and the measurement range is 2V, the output voltage will clamp (limit) at 1V.
“Range” compliance can occur when the compliance setting is higher than the possible
reading of the selected measurement range. When in compliance, the source output clamps at
the maximum measurement range reading (not the compliance value). For example, if the com-
pliance voltage is set to 1V and the measurement range is 200mV, the output voltage will clamp
(limit) at 210mV.
Maximum compliance values
The maximum compliance values for the measurement ranges are summarized in
Table 18-2.
When the unit goes into compliance, the “Cmpl” label or the units label (i.e., “mA”) for the
compliance display will flash.
Table 18-2
Maximum compliance values
Measurement range
1
Maximum
compliance value
200mV
002V
020V
200V
001pA
010pA
100pA
001nA
010nA
100nA
001µA
010µA
100µA
001mA
010mA
100mA
210mV
002.1V
021V
210V
001.05pA
010.5pA
105pA
001.05nA
010.5nA
105nA
001.05µA
010.5µA
105µA
001.05mA
010.5mA
105mA
1
1pA-100nA ranges with PreAmp.

Keithley 6430 Specifications

General

Type	Sub-Femtoamp Remote SourceMeter
Compliance Voltage	200 V
Maximum Output Voltage	200 V
Maximum Output Current	100 mA
Compliance Limit	Programmable
Interface	GPIB, RS-232
Input Impedance	>10^14 Ω