Keithley 6485 User Manual

Model 6485 Picoammeter Instruction Manual DDC Emulation Commands D-3
Data
Format
G0 Reading with prefix (NDCA-1.23456E-02) SCPI not
avail-
able—see
FORMat
subsystem.
X
G1 Reading without prefix (-1.23456E-02)
G2 Reading with prefix and buffer suffix (if in B1)
(NDCA-1.23456E-02,012)NEW
Buffer Size In Set buffer size, where “n”=1–2500 A 100
Digits
Jn Set number of digits of precision to return over the bus,
where “n”=4–7 (allowed range)
NEW 5
EOI and
Bus
Hold-off
K0 Enable both EOI and bus hold-off on X SCPI not
available
X
K1 Disable EOI, enable bus hold-off on X SCPI not
available
K2 Enable EOI, disable bus hold-off on X
NEW
SCPI not
available
K3 Disable both EOI and bus hold-off on X
NEW
SCPI not
available
Store
Calibration
none L0 (store calibration) command not supported
CALibration:PROTected:SAVE
CALibration:PROTected:LOCK
F, G
SRQ
Status Bits
Set
M0 Clears SRQ Data Mask
STATus:MEASurement[:EVENt]:ENABle 0
*SRE <value>
value = (current *SRE value) &= (~0x01)
(None) X
M1 Reading Overflow
STATus:MEASurement[:EVENt]:ENABle 128
*SRE <value>
value = (current *SRE value) |= (0x01)
(B0)
M2 Data Store Full
STATus:MEASurement[:EVENt]:ENABle 512
*SRE <value>
value = (current *SRE value) |= (0x01)
(B1)
NEW
M3 Data Store Full or Reading Overflow
STATus:MEASurement[:EVENt]:ENABle 640
*SRE <value>
value = (current *SRE value) |= (0x01)
(B1, B0)
NEW
Table D-1 (continued)
Device dependent command summary
Mode Command
Description
Equivalent SCPI commands
Note Default

Keithley 6485 Specifications

General

Model	Keithley 6485
Category	Picoammeter
Input Impedance	>10^14 Ohms
Voltage Burden	<200µV
Accuracy	0.4% of reading
Voltage Source Range	Not Applicable
Voltage Source Resolution	Not Applicable
Voltage Source Accuracy	Not Applicable
Interface	IEEE-488
Power Requirements	100V to 240V AC, 50/60Hz
Dimensions	89 mm high x 214 mm wide x 369 mm deep (3.5 in x 8.4 in x 14.5 in)