Keithley 237

SECTION1
Getting
Started
Current Limit
Load
Line'
25mA
-+-------'--------.
Operating
/point
~
20mA
~
:::J
m
..5
Vsource
(Vs)
lm
=Vs/R
=
1ovtsoon
=20mA
A.
Normal V-5ource
Operation
Figure
1-12.
V-Source
Operation
Examples
Voltage
Source
/Load
Line
10V
25mA. Conversely, as resistance increases, the slope of
the
OUT
load line decreases.
At
infinite resistance (open
output), the Source Measure
Unit will source
lOV
at
vir-
tuallyOmA.
1-12
+
+
Current Limit
Load
Line
sv
Vsource
(Vs)
Vs=lm•R
=
(25mA)(2000)
=5V
Voltage
Source
/Load
Line
10V
B.
V-5ource
in
Compliance
Regardless of the load, current
will
never exceed the pro-
grammed compliance
of
25mA. Also, maximum
power
to a
OUT
in
this case
will
never exceed 250mW
(lOV
X
25mA).