Keithley 6487 Reference Manual

Model 6487 Reference Manual SCPI Reference Tables 14-17
Table 14-8
TRACe command summary
Command Description
Default
parameter
Ref
Section
SCPI
:TRACe|:DATA Use :TRACe or :DATA as root command. Note
1
6 √
:DATA? [BUFFER] Read the contents of normal or A-V ohms
buffer.
2
BUFFER √
:MODE? Query buffer mode:
DC (normal) or AVOLtage (A-V ohms).
:CLEar Clear readings from buffer.
:FREE? Query bytes available and bytes in use. √
:POINts <n> Specify size of buffer: 1 to 3000. 100 √
:ACTual? Query number of readings stored in buffer.
:POINts? Query buffer size. √
:FEED <name> Select source of readings for buffer: SENSe[1],
CALCulate[1], or CALCulate2.
SENS1 √
:CONTrol <name> Select buffer control mode: NEXT or NEVer. NEV √
:CONTrol? Query buffer control mode. √
:FEED? Query source of readings for buffer. √
:TSTamp Timestamp:
:FORMat <name> Select timestamp format: ABSolute or DELta. ABS
:FORMat? Query timestamp format.
1.
SYSTem:PRESet and *RST have no effect on the commands in this subsystem. The listed defaults are power-on defaults.
2.
Readings come from A-V ohms buffer if available; normal buffer readings otherwise.

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%