Keithley 6482, Reference Manual

Page: 46 / 350

6482-901-01 Rev. A / August 2012 Return to Section Topics 2-9
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 2: Connections
CAUTION
With the ground connect mode enabled, analog output LO can float up to
±30 V above chassis ground, depending on the voltage bias source setting.
Connecting the analog outputs to external equipment that does not allow
analog output low to float up to ±30 V may result in damage to the Model 6482
voltage bias sources when the ground connect mode is enabled.
Figure 2-7
Nonisolated analog output connections
Isolated connections
To maintain proper isolation between the analog outputs and chassis ground, use the isolated
connections shown in
Figure 2-8 . A wide-bandwidth single channel signal conditioning module
(Analog Devices 3B41-03 Isolated Wideband Voltage Input subsystem) is used to provide isolation
between the Model 6482 ANALOG OUT and the measuring instrument. Analog output HI (center
conductor) is connected to the HI input terminal of the isolator; analog output LO (inner shield) is
connected to the LO input. As shown in the figure, the two isolator V
OUT
terminals are connected
to the measuring instrument HI and LO INPUT terminals.
Refer to the documentation provided with the signal conditioning module for connections, power
supply, and configuration information for your application.
NEXT
PREV
POWER
DISPLAY
2001 MULTIMETER
DCV ACV DCI ACI
Ω
2
Ω
4
FREQ TEMP
REL TRIG
INFO LOCAL EXIT ENTER
RANGE
RANGE
!
F R
500V
PEAK
FRONT/REAR
2A 250V
AMPS
CAL
STORE RECALL
CHAN SCAN
FILTER MATH
CONFIG MENU
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1100V
PEAK
AUTO
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
SERIAL NO.
120
LINE RATING
50, 60Hz
60 VA MAX
FUSE LINE
630 mAT
(SB)
315 mAT
(SB)
100 VAC
120 VAC
220 VAC
240 VAC
CAT I
MADE IN
U.S.A.
OUTPUT ENABLE
RS-232
TRIGGER LINK
INPUT
RATINGS MAX.
30 V @ 20mA
CHANNEL 1
CHANNEL 2
RATINGS MAX.
COMMON
MODE
200V
!
!
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
ANALOG
OUT
RATINGS MAX.
30 V @ 20mA
VOLTAGE
SOURCE
OUT
30 V @ 20mA
Model 6482
Measuring instrument
CHANNEL 1
ANALOG
OUT
Inner
shield
Center
conductor
INPUT
HI
INPUT
LO
Triaxial
cable