Keithley 6514, Instruction Manual

Page: 325 / 334

Introduction
This appendix contains information on reading Model 5156 Electrometer Calibration Stan-
dard values as well as a summary of Model 6514 remote calibration commands. See Section 19
for complete calibration information.
Reading calibration standard values
Instead of manually computing calibration currents and charge values, you can read out
Model 5156 Electrometer Calibration standard values via remote, then use a computer to
calculate those values.
Data transfer connections
Figure H-1 shows data transfer connections. Connect the Model 6514 DIGITAL I/O connec-
tor to the Model 5156 TO 6517 DIGITAL I/O connector using the optional Keithley CA-199-1A
data transfer cable. Also connect the Model 6514 to the GPIB or RS-232 port of the host com-
puter (not shown).
Reading values
To read out Model 5156 standard values, send the following remote command to the
Model 6514:
:CAL:UNPR:KI5156?
The unit will return an ASCII string of floating-point values in the following order:
100G Ω , 10G Ω , 1G Ω , 100M Ω , 1nF, 100nF
Note that the values will be delimited by commas (,).
Model 6514 Electrometer Model 5156 Calibration Standard
CA-199-1A Cable
WARNING:
TO ASSURE PROPER SAFETY
GROUNDING ALWAYS CONNECT
TRIAX CABLE FROM OUTPUT
CONNECTOR TO ELECTROMETER
BEFORE APPLYING VOLTAGE.
KEITHLEY
MADE IN
U.S.A.
MAX VOLTAGE
INPUT 200
VDC
SHIELD
200 VDC MAX
CHASSIS
OUTPUT
100G Ω
10G Ω
1G Ω
100M
Ω
1n
F
100n
F
TO 6517
DIGITAL
I/O
!
!
RS232 DIGITAL I/O
PREAMP
250V PK
2V
OUTPUT
COMMON CHASSIS
120
FUSE LINE
630mA
LINE RATING
50, 60Hz
60 VA MAX
T
(SB)
100 VAC
120 VAC
315mAT
(SB)
220 VAC
240 VAC
INPUT 250V PK
IEEE-488
(CHANGE IEEE
WITH FRONT PANEL MENU)
TRIGGER LINK
!
! MADE IN
U.S.A.
V, GUARD
(PROGRAMMABLE)
OFF ON
GUARD
(FOLLOWS
INPUT)
(INTERNAL)
INPUT PREAMP
10K
PREAMP
OUT
2V
OUTPUT
COM
Figure H-1
Data transfer
connections
H-2 Calibration Options