BK Precision 1794, Instruction Manual

SECTION - 4

OPERATING INSTRUCTIONS

4.1

TURN ON SETTING PROCEDURE :

The   following   procedure   describes  the  use of controls and indicators for
Constant Voltage and Constant Current Mode of Operation.

CONSTANT VOLTAGE (CV) MODE :

a.   Set  ‘POWER ON’  Switch  &  keep the OUTPUT ON/OFF switch to OFF
      position   (          ).
b.   Press LIMIT switch and adjust the VOLTAGE controls till the desired voltage is
      indicated on Voltmeter  (          ).
c.   Press OUTPUT switch to ON position and observe that CV LED lights (         )

CONSTANT CURRENT VOLTAGE (CC) MODE :

a.  Turn off  the  suppy.  Short  circuit  the  output  terminals  of the power supply
     & turn on the supply.
b.   Keep the OUTPUT ON/OFF switch in the OFF position   (          ).
c.   Press LIMIT switch and adjust the CURRENT controls till the desired current is
      indicated on Ammeter  (           ).
d.   Press OUTPUT switch ON position and observe that CC LED lights (          ).
e.   Remove the short circuit.

4.2

SET LIMIT CONTROL (VOLTAGE AND CURRENT) :

To preset the output Voltage and Current, proceed as follows :
a.   Set the OUTPUT switch to OFF position  (          ) ( Release Position ).
b.   Press  the  LIMIT  switch  and  adjust  the  desired  output  voltage  with  the
      VOLTAGE control potentiometers   (          ).
c.   Release the LIMIT switch, set the OUTPUT switch to ON position and check
      the output voltage on the voltmeter  (          ).
d.   Set the OUTPUT switch to OFF position  (          ).
e.   Press  the  LIMIT  switch  and  adjust the desired output current limit with the
      CURRENT control potentiometers  (          ).
f.    Release the LIMIT switch, set the OUTPUT switch to ON position and check
      the output current on the ammeter  (          ).
g.   Set the OUTPUT switch to OFF position  (          ).
h.   Connect the load to the Output terminals and set the OUTPUT switch to ON
       position  (          ).

4.3

LOAD CONNECTIONS :

The load should be connected  to the power supply output terminals using separate
pairs of connecting wires. This will minimize mutual coupling effects between loads
and will retain full advantage of the low output impedance of the power supply.
Each pair of connecting wires should be as short as possible and twisted or shielded
to reduce noise pick up. (If a shielded pair is used, connect one end of the shield to
ground and leave the other end unconnected).

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