Keithley 6514, Instruction Manual

Page: 261 / 334

19-8 Calibration
3. Connect the triax short (triax cable with red and black alligator clips connected together)
to the rear panel INPUT jack.
4. Press ENTER to complete offset voltage calibration.
Input bias current calibration
1. From the calibration menu, use the down RANGE key to display the following:
CAL: IOFFSET
2. Press ENTER. The instrument will prompt for an open input:
INPUT CAP
3. Connect the triax shielding cap to the rear panel INPUT jack.
4. Press ENTER to complete input bias current calibration.
Volts calibration
1. Connect the voltage calibrator to Model 6514 INPUT jack, as shown in Figure 19-1. Be
sure to use the low-noise coaxial cable and appropriate adapters as shown.
2. Select Model 6514 volts function by pressing the V key, and set the calibrator to output
DC volts.
3. Select Model 6514 2V range and make sure the calibrator output is turned on.
4. Press SHIFT then CAL to access the calibration menu. The unit will display the
following:
CAL:RUN
5. Press ENTER. The unit will prompt for the zero calibration point:
2V ZERO
6. Connect a triax short to the INPUT jack, and then press ENTER.
7. The unit will prompt for the +2V cal point:
+2V CAL
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
Input
Triax-to-BNC Adapter
Model 6514 Electrometer
DC Voltage Calibrator
BNC-to-dual
Banana Plug
Adapter (Connect
Cable Shield to
Output LO)
Calibrator
Output
Low-noise Coax BNC Cable
Figure 19-1
Connections for
volts calibration