Keithley 2602A User Manual

2600AS-900-01 Rev. B / September 2008 Return to Section Topics A-7
Series 2600A System SourceMeter
®
Instruments User’s Manual Appendix A: Frequently Asked Questions
Figure A-3
Stacking channels for higher voltage
NOTE Each stacked channel adds approximately 100μA of common mode
current that is seen by the channels below it. Therefore, in the
example above, Model 2602A-1 Chan A will measure approximately
100μA x 3 = 300μA higher than Model 2602A-2 Chan B. Similarly,
Model 2602A-1 Chan B will measure approximately 100μA x 2 =
200μA higher than Model 2602A-2 Chan B. The most accurate
measurement of actual current flowing through the DUT will be
obtained from Model 2602A-2 Chan B.
How do I parallel channels to output higher current?
The maximum DC output current of a Model 2601A or Model 2602A channel is as follows:
• 1.01A @ up to 40.4V
• 3.03A @ up to 6.06V
The maximum DC output current of a Model 2611A/2612A or Model 2635A/2636A channel is as
follows:
• 101mA @ up to 202V
• 1.515A @ up to 20.2V
Higher current can be output by connecting channels in parallel. Figure A-4 shows four channels
of two Model 2602As, 2612As, or 2636As connected in parallel. Two Model 2602As can output up
to 4.04A at up to 40.4V and 12.12A at up to 6.06V, while two Model 2612As and Model 2636As
can output up to 404mA at up to 202V and 6.06A at up to 20.2V. The current delivered to the DUT
is the sum of currents output by the four SMU channels. More current can be output by connecting
additional channels in parallel.
Hi
Lo
+

40.4V
max
Hi
Lo
+

40.4V
max
Chan B
Chan A
2602A-2
Hi
Lo
+

40.4V
max
Hi
Lo
+

40.4V
max
Chan B
Chan A
2602A-1
Chassis earth ground
DUT
161.6V
Max
Output low
connected
to chassis
Safety
earth
ground
Safety
shield
Each 2602A chassis is connected to chassis
earth ground through the power cord.
WARNING
Connect metal safety shield
to safety earth ground using
#18 AWG or larger wire.
Note
On the 2602A-1, connect Channel A
LO to the chassis at the rear panel.
LOs for the other channels must be
isolated from chassis.

Keithley 2602A Specifications

General

Brand	Keithley
Model	2602A
Category	Measuring Instruments
Language	English