Keithley 6487 Reference Manual

C-8 DDC Emulation Commands Model 6487 Reference Manual
Status
Word
U0 Return status word. See Figure C-1. Each SCPI
parameter must be queried individually. For example:
SENSe[1]:CURRent:RANGe?
U1 Send error conditions. See Figure C-2.
U2 Send model number and firmware revision
SYSTem:VERsion?
U3 Send calibration value
CALibration:PROTected:SENSe:DATA?
U4 Send interval
ARM:TIMer?
U5 Send delay
TRIGger:DELay?
U6 Send relative value for current
CALCulate[1]:NULL:OFFSet?
U7 Send relative value for V/I ohms
CALCulate[1]:NULL:OFFSet?
U8 Send voltage source value
SOURce[1]:VOLtage?
U9 Send voltage source status word. See Figure C-3.
Voltage
Source
Vn,r,l Voltage source value, range, current limit
n = -505 to 505
SOURce[1]:VOLTage <NRf>
r: 0 = 50V range; 1 = 500V range
SOURce[1]:VOLTage:RANge <NRf>
l: 0 = 25μA limit; 1 = 2.5mA limit
SOURce[1]:VOLTage:ILIMit <NRf>
0V
50V
2.5mA
Delay
Wn Delay trigger for “n’ seconds. n = 0 to 999.999sec
TRIGger:DELay <NRf>
0
Execute
X Execute other device-dependent commands. SCPI not appli-
cable (SCPI commands execute as they are received)
Terminator
Y0 CR LF (carriage return, line feed) X
Y1 LF CR (line feed, carriage return)
Y2 CR (carriage return)
Y3 LF (line feed) N
Y4 None
Table C-1 (co n t .)
Device dependent command summary
Mode Command
Description
Equivalent SCPI or 488.2 commands
Note Default

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%