Keithley 6487 Reference Manual

Model 6487 Reference Manual SCPI Reference Tables 14-15
Table 14-7
SYSTem command summary (see Section 13 for detailed information)
Command Description
Default
parameter
Ref
Section
SCPI
:SYSTem 13
:ZCHeck Zero check: 3
[:STATe] <b> Enable or disable zero check. ON
[:STATe]? Query state of zero check.
:ZCORrect Zero correct: 3
[:STATe] <b> Enable or disable zero correct. OFF
[:STATe]? Query state of zero correct.
:ACQuire Acquire a new zero correct value. *
:PRESet Return to SYSTem:PRESet defaults. √
:LFRequency <freq> Select power line frequency: 50 or 60 (Hz). 60 1
:LFRequency? Query frequency setting.
:AUTO Path to control auto frequency.
[:STATe] <b> Enable or disable auto frequency. ON
[:STATe]? Query state of auto frequency.
:AZERo Path to control autozero: 3 √
[:STATe] <b> Enable or disable autozero. ON √
[:STATe]? Query state of autozero. √
:TIME Timestamp:
:RESet Reset timestamp to 0 seconds.
:POSetup <name> Select power-on setup: RST, PRESet, or SAVx
(where x = 0 – 2).
PRES
:POSetup? Query power-on setup.
:VERSion? Query SCPI revision level. √
:ERRor Read error queue: (see note) 10 √
[:NEXT]? Read and clear oldest error/status (code and
message).
:ALL? Read and clear all errors/status (code and
message).
* ZCH:STAT must be ON and ZCOR:STAT must be OFF in order to acquire a new zero correct value.
Note: Clearing the error queue – Power-up and *CLS clears the error queue. *RST, SYSTem:PRESet, and STATus:PRESet have no
effect on the error queue.

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%