Keithley 6487 Reference Manual

Model 6487 Reference Manual DDC Emulation Commands C-3
Zero
Check
C0 Disable Zero Check
SYSTem:ZCHeck OFF
X
C1 Enable Zero Check
SYSTem:ZCHeck ON
C2 Enable Zero Check and perform Zero Correct
SYSTem:ZCHeck ON
SYSTem:ZCORrect ON
B
Display
Text
Da Display ASCII text message up to 12 characters
DISPlay:TEXT <string>
DISPlay:TEXT:STATe ON
D Cancel display text mode (return to normal display)
DISPlay:TEXT:STATe OFF
X
Ohms
F0 Disable ohms
[SENSe[1]]:OHMS OFF
X
F1 Enable ohms
[SENSe[1]]:OHMS ON
Data
Format
G0 ASCII readings with prefix (NDCA-1.23456E-02)
SCPI not
available See
FORMat
subsystem.
X
G1 ASCII readings without prefix (-1.23456E-02)
G2 ASCII readings with prefix and buffer suffix (if in B1 or B2,
NDCA-1.23456E-02,012)
G3 ASCII readings without prefix and buffer suffix (if in B1 or
B2, -1.23456E-02,012)
G4 Binary readings, IEEE-754 std., single-precision, byte order
reversed.
FORMat:DATA SREal
FORMat:BORDer SWAPped
G5 Binary readings, IEEE-754 std., single-precision, normal
byte order.
FORMat:DATA SREal
FORMat:BORDer NORMal
G6 Binary readings with exponent, byte order reversed (not sup-
ported)
C
G7 Binary readings with exponent, normal byte order
(not supported)
C
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%