Lambda 303 Series, Operator'S Manual

Page: 29 / 56

CONTROLS, INDICATORS, CONNECTORS
83-489-009 Rev A
5-7
5.3 LOCAL VOLTAGE CONTROL (Ref 2)
The local voltage control potentiometer is a precision 10 turn dial indicator that adjusts
the output voltage between zero and 100% of rated voltage. The output voltage can be
set at the desired level by turning the dial to the required percentage before depressing
the HV ON push button. It is good practice to turn the control fully counter clockwise af-
ter operating the supply. The local voltage control has no effect when the supply is op-
erate in remote mode.
5.4 OUTPUT VOLTAGE METER (Ref 3)
The VOLT METER is a digital display that indicates the peak output voltage in kilovolts.
The displayed voltage is the peak output voltage at END OF CHARGE during normal
operation of charging and discharging the load. The VOLT METER displays the voltage
at the output (on the output cable) even when the HV output is turned OFF, and hence
shows any residual voltage that remains on the capacitive load.
5.5 OUTPUT CURRENT METER (Ref 4)
The CURRENT METER indicates the average DC (or constant) current flowing in the
HV output cable.
5.6 TRIGGER push button (Ref 5)
The TRIGGER indicator/push-button will illuminate when an INHIBIT signal is applied to
the power supply. The TRIGGER indicator will illuminate long enough to be seen even if
the inhibit pulse is very short (microseconds).
In addition the TRIGGER push-button allows "one shot" charging and discharge of the
load circuit. This is useful when charging very large capacitor banks for "one shot" appli-
cations. To use this function, depress the TRIGGER push-button when the power supply
is in the OFF state (OFF push-button illuminated). The HV ON push-button will F-L-A-S-
H and continue to flash indicating the power supply is armed. When the HV ON push-
button is depressed, the power supply will turn ON the HV output, charge the capacitor
load and turn OFF when END OF CHARGE is reached. The HV will stay OFF and not
recharge or "top off" the capacitor if its voltage begins to bleed off.
5.7 KEY LOCK CONTROL (Ref 6)
DO NOT MOVE THE KEY LOCK POSITION FROM OFF TO
LOCAL OR REMOTE UNLESS A SUITABLE CAPACITIVE
LOAD IS CONNECTED TO THE POWER SUPPLY'S
OUTPUT CABLE, AND THE LOAD IS CORRECTLY
GROUNDED
The KEY LOCK CONTROL is used to set the operational mode of the power supply in
one of three positions, OFF, LOCAL, or REMOTE.