8
Eo=1/10 E
max
.E
1
.a (V)
Where Em: Maximum rated voltage (V)
El: External control voltage signal (V)
0V
≤
E
1
≤
<l0V
Term
α
is factor of 0-l which depends on the “voltage” setting potentiometer. Factor is 1
when “VOLTAGE” voltage setting potentiometer is set to the extreme positions clockwise.
Factor is 0 when both potentiometers are set to the extreme positions counterclockwise. It is
used to select the ratio of the output voltage (Eo) with respect to the external control voltage
signal (E1). Norma1ly, it is adjusted to the maximum vo1tage.
NOTE
NOTE
NOTE
NOTE
1:
1:
1:
1:
The vo1tage of the common line of the external control voltage signa1
(El) becomes that of the “+” output terminal.
NOTE
NOTE
NOTE
NOTE
2:
2:
2:
2:
The input impedance across remote control input jack is approximately
20K
Ω
. The ripple may be amplified and conveyed to the output loop circuit.
NOTE
NOTE
NOTE
NOTE
3:
3:
3:
3:
To feed the external control vo1tage signal, a shielded cab1e (or a pair of stranded
wires) is used and the shielding wire is connected to the “+” output terminal. When the
wiring distance is very long, should prove a full protection against noise.
NOTE
NOTE
NOTE
NOTE
4:
4:
4:
4:
When the R/L (remote/local) switch is thrown to the L position, the output voltage
can be control1ed with the voltage setting potentiometer manually on the front panel.
NOTE
NOTE
NOTE
NOTE
5:
5:
5:
5:
Make sure that the output voltage is within the rated output voltage of the
instrument.
4.6
4.6
4.6
4.6
Remote Control Constant
-
Current Mode
The output current can be controlled by the external contro1 voltage signal
4.6.1
4.6.1
4.6.1
4.6.1
Turn on the V/C (voltage/current) selector switch to C position.
4.6.2
4.6.2
4.6.2
4.6.2
The external control voltage signal is applied to the “INPUT” jack which is
on the rear panel of the instrument. Please note the po1arities of “+” and “-”.
4.6.3
4.6.3
4.6.3
4.6.3
Throw the R/L
-
switch to R (remote control) position.
4.6.4
4.6.4
4.6.4
4.6.4
Turn on the power supply and output switch, then the output terminal is shorted, set the
current setting potentiometer mounted on the front panel to obtain the required output current
which is 10V at E2.
Output
The relationships between the external control voltage signa1 E
2
and the output current I
0
can
be expressed as fo1lows:
I
0
= 1/10. I
max
E
2.
β(
A)
where:
I
max
–
Maximum rated current (A)
E
2
–
External control voltage (V)
0(V)
≤
E
2
≤
10(V)
Remote
Control Input
E
1
NOTE 2
R
L
NOTE 1
NOTE 4
NOTE 3
Figure 4
