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Keithley 6221 User Manual

Keithley 6221
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Model 6220/6221 Reference Manual KI-220 Language 15-5
Return to Section 15 topics
Terminators are selected using Y<n>, where n = 0-4. The default terminator
is <CR LF>, which is Y0 in this notation. For the U0 query string, the
Model 622x will return a ‘:’ in the Y position for the default terminator (like
the Model 220 does). Otherwise we will return the digit 1-4 will be returned
for the other choices.
12. When a sweep is halted on the Model 220 (by pressing the Start/Stop key),
the output remains on and the source remains at the last memory value it
was at when the sweep is stopped. Stopping a sweep on the Model 622x
(with the EXIT key) resets you to the first memory location and turns the
output off. Note that in the KI-220 mode with the Program Command set to
Continuous or Single (P1 or P0), the Model 622x TRIG key will behave like
the Model 220 Start/Stop key (e.g., one push starts the sweep, the next
pauses, etc.).
13. The Model 220 has only a single external trigger line available. In the
KI-220 language mode, only TLINK line #1 will function as the external trig-
ger input. To avoid confusion and the possibility of getting into undesirable
states, the entire CONFIG > TRIG menu will be locked out in the KI-220
mode. The trigger output pulse will always be issued on TLINK line #2, and
it will be issued at the end of the Dwell time (Delay time). Unlike Model 622x
operation, the trigger output pulse cannot be disabled in KI-220 mode.
14. Changing Model 622x trigger modes by sending the P command will
always reset the memory location back to 1. The Model 220 leaves it where
it was.
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Keithley 6221 Specifications

General IconGeneral
InterfaceGPIB, RS-232
Communication InterfaceGPIB, RS-232
Current Sourcing Accuracy±(0.03% of output + 20 pA)
Current Sinking Accuracy±(0.03% of output + 20 pA)
Output Resolution100 fA
Output Accuracy±(0.03% of output + 20 pA)
Power Requirements100 V to 240 V AC, 50/60 Hz

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