Ground Connect Mode Connections - Keithley 2500 User Manual

Model 2500 and 2502 User's Manual

Ground connect mode connections

The VOLTAGE SOURCE output jack for either channel can either be connected to chassis
ground or left floating, depending on the selected ground connect mode. (See
"Ground connect mode,"
rate connections to the VOLTAGE SOURCE OUTPUT jack, as shown in
However, with ground connect enabled, you can bias and measure the DUT using a single
triax cable, as shown in
HI, while the other DUT terminal is connected to chassis ground through the outer shield
of the triax cable connection.
Figure 2-5
Test connections using ground connect mode
Forward
Photodiode
Laser
Diode
Back
Photodiode
Optional Noise
Shield (Connect
to INPUT LO)
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
for details.) With ground connect disabled, you must make sepa-
Figure 2-5. Note that one DUT terminal is connected to INPUT
Figure 2-6
INPUT HI
Chassis Ground
INPUT LO
Triax Cables
INPUT HI
Chassis Ground
INPUTS
RATINGS MAX
100V @ 20mA
COMMON
MODE
INPUT
CHANNEL 1
CAT
RATINGS MAX
100V @ 20mA
VOLTAGE SOURCE
OUTPUT CHANNEL 1
CAUTION:
shows an equivalent circuit.
INPUT HI: center conductor
INPUT LO: inner shield
Chassis Ground: outer shield
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS, SERVICE BY QUALIFIED PERSONNEL ONLY.
MADE IN
U.S.A.
200V
INPUT DIGITAL I/O
CHANNEL 2
!
RS-232
TRIGGER LINK
I LINE RATING
50, 60Hz
60 VA MAX
FUSE LINE
630 mAT 100 VAC
(SB) 120 VAC
!
315 mAT 220 VAC
VOLTAGE SOURCE
(SB) 240 VAC
OUTPUT CHANNEL 2
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING
Model 2500
Connections 2-7
Section 3,
Figure 2-3.
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
.