Keithley 6482 - Output Enable; Connection Methods; Current Measurement Connections

6482-901-01 Rev. A / August 2012 Return to Section Topics 2-5
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 2: Connections
Output enable
An interlock switch can be used with the Model 6482 output enable line on the OUTPUT ENABLE
connector to inhibit the voltage bias source outputs. When output enable is activated, the
Model 6482 outputs will turn off when the lid of the test fixture is opened.
WARNING To prevent electric shock, test connections must be configured such that the
user cannot come in contact with conductors or any device under test (DUT)
that is in contact with the conductors. Safe installation requires proper
shields, barriers, and grounding to prevent contact with conductors. You must
always assume that power is present until you verify that the Model 6482
output is off. Operator protection and safety are the responsibility of the
person installing the product.
See Section 11 for complete details on using the output enable circuit.
Connection methods
The Model 6482 can be used as an ammeter to make current measurements, or as a voltage
source to provide bias voltage to any suitable device.
Current measurement connections
Figure 2-3 shows typical connections using channel 1 to measure the device under test (DUT)
current. Note that the INPUT HI terminal (center conductor) is connected to DUT HI, while the
INPUT LO terminal (analog common) is connected to DUT LO.
NOTE The DUT can be biased and measured using only a triaxial cable with the ground connect
mode. For more information, see Ground connect mode connections.
Figure 2-3
Current measurement connections
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
INPUT LO
(inner shield)
DUT
INPUT HI
(center conductor)
Model 6482
Triaxial cable
Optional noise
shield (connect
to INPUT LO)