KEPCO BOP 5-20DL, Operator'S Manual

Page: 41 / 70

BOP 5-20DL 081915
3-7
FIGURE 3-4. BOP CURRENT CONTROL CHANNEL (LOCAL CONTROL, LOCAL SENSING)
Proceed as follows:
1. Determine the output voltage and current requirement of your load. Set the MODE switch (8,
Figure 2-1) to CURRENT and the CURRENT CONTROL switch (12) to ON.
2. With the POWER circuit breaker/switch (2) set to OFF, disconnect the load. Set the POWER
circuit breaker/switch to ON again.
3. Adjust the VOLTAGE LIMITS controls for –
V
(25) and +
V
(23) polarities as required, moni-
toring output VOLTAGE meter (5) for the voltage limiting value. Proceed as follows:
a. Turn CURRENT CONTROL (13) fully counterclockwise.
b. Adjust –
V
VOLTAGE LIMITS control (23) as required.
c. Turn CURRENT CONTROL (13) fully clockwise.
d.
V
VOLTAGE LIMITS control (25) as required.
e. Turn CURRENTCONTROL (13) to the center of its range.
f. Set POWER circuit breaker/switch (2) to OFF and reconnect the load.
4. Set POWER circuit breaker/switch (2) to ON again, and adjust the operating current by
means of CURRENT CONTROL (13) to the value required.
NOTE: If the output voltage exceeds the preadjusted value at any time the Current Mode indi-
cator (15) will go out and the VOLTAGE LIMITS indicator will go on. After the cause of
the overvoltage is eliminated, the indicators will return to their initial status.
BOP CURRENT
CONTROL CHANNEL
PART OF REAR PROGRAMMING CONNECTOR
22
C
+
+
28
CURRENT
CONTROL
CURRENT
PROGRAMMING
INPUT
OFF
10V
10V
ON
10K
10K
13
15
4
NOTES:
1. Set MODE Switch to CURRENT.
2. Set CURRENT CONTROL switch to ON for local
(front panel) control and OFF for remote control.
3. Local sensing shown. Remote sensing not
recommended for Current control.
4. For inductive loads in excess of 0.5mH, the BOP
output response may be optimized by placing a
capacitor across terminals 16 and 18 of the Rear
Programming Connector (
I
o COMP AMP).
I
o ZERO
POWER
STAGE
COMMON
ZERO
+
10K
PREAMP
"B"
-
2
19
I
o COMP
AMP
+
-
DRIVER
R
G
A
T
E
S
C
16 18
LOAD
3043683
COM
S
OUT
S
SIGNAL
GROUND
R i
f
R