Keithley 6487 Reference Manual

Model 6487 Reference Manual Buffer and Sweeps 6-9
The front panel sweep parameters are not error checked until you have entered a STEP
value. If there are too many points, the error message “TOO MANY PTS” briefly appears
and you will be taken back to the start (STRT) value entry menu.
Likewise, a step size larger than the (stop-start) interval results in the message “STEP
TOO BIG”. Note that as long as the front panel V-MODE setting is SWEEP, the TRIG key
will function to initiate sweeps rather than as a trigger source. To return the TRIG key to
its normal behavior, use CONFIG -> OPER to set V-MODE back to DC.
Figure 6-2
Voltage sweeps
Start
Stop
Step
Step
Step
X
X
X
X
Delay
Delay
Delay
Delay
Note: X = Measurements taken.

Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%