Keithley 6487 Reference Manual

14-16 SCPI Reference Tables Model 6487 Reference Manual
:COUNt? Read the number of messages in queue.
:CODE Code numbers only:
[:NEXT]? Read and clear oldest error/status (code
only).
:ALL? Read and clear all errors/status (codes only).
:SYSTem:
:CLEar Clear messages from error queue. 10
:KEY <NRf> Simulate key-press. √
:KEY? Query the last “pressed” key. √
RS-232 interface: 9
:LOCal While in LLO, removes the LLO and places the
Model 6487 in local (RS-232 only).
:REMote Places the Model 6487 in remote if not in LLO
(RS-232 only).
:RWLock Places the Model 6487 in local lockout (RS-232
only).
:KLOCK <b> When true, functions the same as local lockout
and prevents LOCAL key from taking unit out
of remote.
OFF 9
:KLOCK? Query key lock state.
Table 14-7 (cont.)
SYSTem command summary (see Section 13 for detailed information)
Command Description
Default
parameter
Ref
Section
SCPI

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%