Compliance; Basic Circuit Configuration - Keithley 2500 User Manual

Models 2500 and 2502 User's Manual

Compliance

Each voltage bias source has a maximum output level of 100V @ 20mA. If the load resis-
tance is low enough so that the unit exceeds the 20mA current limit, the unit is considered
to be in compliance, and the corresponding source display field (Src1 or Src2) will blink.
See Section
compliance for limit testing
SRQ under compliance conditions over the GPIB
Basic circuit configuration
The fundamental circuit configuration for the Model 2500 is shown in
that the unit has two separate channels (one channel shown), each of which includes a
feedback ammeter and a 0 ±10V or 0 ±100V voltage bias source.
the output enable circuit, which is shown enabled
relay (see
the triax INPUT jack and the SOURCE OUTPUT terminal.
Figure 3-1
Basic circuit configuration
DUT
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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5, "Bias source operating boundaries,"
(Section
"Ground connect mode," page
Triax
INPUT
I
20mA Max
Chassis
Ground
SOURCE
OUTPUT
Output
On
Bias Source
Ground
0 to ±10V or
Connect
0 to ±100V
20mA Max
Chassis
Ground
for more information. You can also use
10), and the unit can be programmed to generate an
(Section 14).
(Section 12), and the ground connect
3-8). Note that the DUT is connected between
R
F
HI
-
LO
+
Feedback Ammeter
Floating Channel 1 or
Channel 2 Common
Note: One channel shown.
Other channel is identical.
Basic Operation 3-3
Figure 3-1. Note
Figure 3-1 also shows
To A/D
Converter