Lambda 303 Series, Operator'S Manual

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CONTROLS, INDICATORS, CONNECTORS
83-489-009 Rev A
5-9
5.9 HV ON (Ref 8)
DO NOT DEPRESS THE HV ON PUSH-BUTTON UNLESS A
SUITABLE CAPACITIVE LOAD IS CONNECTED TO THE
POWER SUPPLY'S OUTPUT CABLE, AND THE LOAD IS
CORRECTLY GROUNDED
The HV ON push button turns ON the high voltage output when depressed only after all
interlocks are closed, self checks are completed and the unit is switched to the LOCAL
mode. HIGH VOLTAGE will be generated immediately when the HV ON is depressed
and the push-button switch will illuminate and remain illuminated while the HV in ON.
The supply will charge the load to the voltage determined HV LEVEL ADJUST 10 turn
pot. It is prudent to first reset the HV LEVEL ADJUST 10 turn pot fully counterclockwise
(to zero) before depressing the HV ON push-button when first using this power supply.
Later on during system usage, the HV LEVEL ADJUST control may be left set at the de-
sired level.
If a fault is present when the HV ON push-button is depressed, the HV OFF push-button
will FLASH indicating the presence of a fault condition.
5.10 AC POWER (Ref 9)
The front panel POWER switch controls the main input power to the unit. It closes the
AC input contactor that applies AC power to the control logic. The POWER switch only
controls a low voltage signal, and is not directly connected to the main AC line. This low
voltage control signal is wired in series with two terminals on the rear panel. (4 position
barrier strip) marked as INTERLOCK/POWER ON (see Figure 5-3).
The INTERLOCK/POWER ON terminals at the rear of the unit must be jumpered or
wired to a remote switch or contactor. Both the remote contacts and the front panel
switch must be closed for the unit to turn on.
Once the unit is turned on using the front panel POWER switch, the internal control logic
begins a check sequence test all the lights by switching them all on for about one sec-
ond to let the operator know that all the LED's and the associated drivers are working,
and that the power is applied to the logic circuits.
Within 4 to 6 seconds after the POWER switch is closed and all tests are finished the
AC contactor automatically closes (a loud ‘thunk’ will be heard) applying AC power to
the main power circuits, placing the power supply in the READY state (READY LED il-
luminated). When READY the power supply is considered to be armed and could be
generating high voltage.
5.11 FRONT PANEL LAYOUT (S Model)
The 303S series power supply is equipped with a partially instrumented front panel fea-
turing comprehensive status LEDs, and a power on switch. The 303S can only be oper-
ated remotely via the control connector located on the rear panel (see Section 6.2).