Keithley 6487 User Manual

1-10 Getting Started Model 6485 and 6487 User’s Manual
HALT Stops measurement process. Puts 6485 in idle state.
DIGITS Use to set display resolution.
RATE Use to select measurement rate.
and Use to control cursor position for making selections or editing values.
SAVE Use to save present setup to a memory location.
SETUP Use to restore setup to either GPIB or factory defaults, or
to a user memory location.
Also use to modify properties of power on defaults to either GPIB or factory defaults,
or to a user memory location.
STORE Use to start buffer and modify the number of readings to store.
RECALL Use to display stored readings (including max
imum, minimum, peak-to-peak, aver-
age, and standard deviation). The ¹ and ƒ
range keys scroll through the buffer and the
ß or © key toggles between reading number, reading, and timestamp.
LIMIT Use to perform and create limit tests
.
AZERO Use to control auto zero function (on / off).
EXIT Use to cancel selection and move
back to measurement display.
ENTER Use to accept selection and move to next choice or
back to measurement display.
4 Range keys
¹ Use to select the next higher measurement range. Also use to modify the upper auto-
range limit.
ƒ Us
e to select the next lower measurement range. Also use to modify the lower auto-
range limit.
AUTO Enables/disables autorange.
5 Display annunciators
* (asterisk) Readings being stored in buffer.
(more) Indicates additional selections are available.
AUTO Autorange enabled.
BUFFER Recalling readings
stored in buffer.
ERR Questionable reading or invalid cal step.
FAST Fast (0.1 PLC) reading rate selected.
FILT MEDIAN and/or AVERAGE filter enabled.
LSTN Instrument addressed to listen over GPIB.
MATH mX+b, m/X+b, or log10 calculation enabled.
MED Medium (1 PLC) reading rate selected.
REL Relative enabled for present measurement function.
REM Instrument in GPIB remote mode.
SLOW Slow reading rate selected; 6 P
LC for 60Hz or 5 PLC for 50Hz.
SRQ Service request over GPIB.
STAT Displaying buffer statistics.
TALK Instrument addressed to talk over GPIB bus.
TIMER Timer controlled triggering in use.
TRIG External triggering (GPIB
or trigger link) selected.
6 Handle
Pull out and rotate to desired position.

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%