KEPCO BOP 500M, Руководство оператора, Страница: 33 / 48

BOPHV020411
3-7
3.2 BOP OPERATION WITH LOCAL (FRONT PANEL) OUTPUT CONTROL
3.2.1 VOLTAGE MODE OPERATION WITH CURRENT LIMITING
The BOP may be used as a stabilized (d-c) source of positive or negative voltage with output
current limiting for either polarity pre-selected for the application at hand.
1) Determine the output current and voltage requirement of your load. Set the BOP MODE
SWITCH to the VOLTAGE position and the BIPOLAR VOLTAGE CONTROL switch to ON.
2) With the BOP A-C POWER switch “OFF,” connect a short-circuit across the output termi-
nals. Turn the BOP “ON.”
3) The CURRENT LIMIT LAMP will be on. Adjust the (±) CURRENT LIMIT CONTROLS for
both polarities as required, monitoring the I
O
METER for the correct limiting values. Pro-
ceed as follows: Turn BIPOLAR VOLTAGE CONTROL fully counterclockwise. Adjust the
“(–) I
O
LIMIT CONTROL”. Turn BIPOLAR VOLTAGE CONTROL fully clockwise. Adjust the
(+) I
O
LIMIT CONTROL. Turn A-C POWER switch “OFF” and remove the short-circuit from
the output. If the application is unipolar, choose “zero” limit for the undesired polarity.
4) Without a load connected to the power supply, set BOP A-C POWER switch to “ON.”
Change the BIPOLAR VOLTAGE CONTROL setting until the front panel voltmeter shows
the limit voltage values desired; adjust the corresponding (±) VOLTAGE LIMIT CONTROL
until the VOLTAGE LIMIT LAMP is ON. Repeat the same procedure for the other polarity. If
the application is unipolar, choose “zero” limit for the undesired polarity.
5) Go back to the BIPOLAR VOLTAGE CONTROL and adjust for zero output voltage.
6) Set the BOP A-C POWER switch to “OFF” and connect the load.
7) Turn the A-C POWER switch “ON” again; adjust the operating voltage by means of the
BIPOLAR VOLTAGE CONTROL to the value required.
NOTE: If the output current exceeds the pre-adjusted value at any time, the E
O
MODE LIGHT
will go OFF and the CURRENT LIMIT LIGHT will go on. After the cause of the overcur-
rent is eliminated, the indicator lights will return to their initial status. If the limit voltage
was reached during adjustment, the E
O
MODE LIGHT will go OFF and the VOLTAGE
LIMIT LIGHT will go ON. The output voltage will be clamped to the limit value. Should
the output voltage be decreased via the BIPOLAR OUTPUT VOLTAGE CONTROL,
the unit will return to the voltage mode of operation and the lights will be reset to the
initial status.
3.2.2 CURRENT MODE OPERATION WITH VOLTAGE LIMITING
The BOP may be used as a stabilized d-c source of positive or negative current, with output
voltage limiting for either polarity, pre-selected for the application at hand.
NOTE:Please refer to paragraph 3.1K.
1) Turn the A-C POWER switch “ON” and adjust the (±) VOLTAGE LIMIT CONTROLS to the
required output (compliance) voltage as described in PAR. 3.2.1, step 4. Turn the A-C
POWER switch “OFF”.
2) Adjust the (±) CURRENT LIMIT CONTROLS according to PAR. 3.2.1, steps 1-3.