D
0
0
Figure
14
0
1.
Connect as shown in figure
14.
2 .
"Sense" switch in "INT" position.
0
Do
-
-,
@
Load
3 .
Set the voltage control to some higher value than is necessary to operate
the load, but not so high that the load could be damaged.
4.
Note that the voltage control acts as a "voltage limit" in this application.
5.
Set the current limit to the desired constant current.
6.
The CV-CC lamps should indicate CC.
7 .
The specification achieved with this method is given in section
2
"Constant
current, current regulation using internal precision resistor". If this
specification is not sufficient, see section
3N
for better stability.
N. CON ST A NT CUR RE NT WITH EXTER N A L SHUNT
If the specification achieved with 11Constant current with current limit control"
is not satisfactory, a better sw·cification can
be 8,chiev0d
by using this method.
For specifications, see section
2
"Constant current, current regulation using
4
V over external shunt".
D
0
Q ExrE)
Figure
15
0
0
O
Recommended and specified voltage across the shunt is
4
V. For lower
voltages the specification will decrease proportionally. For higher voltages
the specification will not improve very much.
The shunt resistor must be in the
"+"
cable.
lt
should be a high stability
low temperature coefficient type, as the stability of the constant current is
directly affected by the stability of the shunt resistance. The influence of
resistance variations of the shunt is not included in the specification referred
to above.
18
