Lambda 303 Series, Руководство оператора

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CONTROLS, INDICATORS, CONNECTORS
5-8
5.7.1 OFF Position
With the KEY LOCK in the OFF position, the POWER switch may be turned but HV can-
not be turned on. The unit may be locked in the OFF position and the key removed to
protect equipment and personnel. In normal lab operation, the KEY LOCK CONTROL
switch should remain in the OFF position and should be turned to LOCAL after the
POWER switch is turned on and the power supply has completed its self checks. It is
recommended that the unit always be locked in the OFF position and the KEY removed
when not in use as a safety precaution. The key can only be removed when in the OFF
position. It cannot be removed in either LOCAL or REMOTE positions.
5.7.2 LOCAL Position
With the KEY LOCK in the LOCAL position the power supply is controlled from the front
panel (refer to section 6.1). The local voltage control, HV ON, HV OFF, and TRIGGER
push buttons are active in LOCAL. Note that the key cannot be removed in this position.
5.7.3 REMOTE Position
With the KEY LOCK in the REMOTE position the front panel HV LEVEL ADJUST and
HV ON push button are not active. These commands must be provided via the remote
25 pin D-sub connector on the rear panel. The HV OFF push button remains active with
the KEY LOCK in the remote position. Note that the key cannot be removed in this posi-
tion.
5.7.4 REMOTE/LOCAL/ENABLE LEDs
There are three LEDs adjacent to the keylock control, REMOTE, LOCAL, and ENABLE.
The REMOTE LED indicates the keylock is in the remote position and the local controls
have no function (except HV OFF which will override remote control). The LOCAL LED
indicates the keylock is in the local position, and only the front panel controls can be
used to operate the supply.
The ENABLE LED indicates that a remote enable command is being sent to the power
supply via the remote interface. This is an important check turning the KEY LOCK
CONTROL switch to the REMOTE position. The presence of an ENABLE signal when
selecting REMOTE mode does not allow high voltage to be generated. The remote
ENABLE signal must be recycled (ON-OFF-ON) before H.V. can be generated.
The ENABLE LED will illuminate when the power supply KEY LOCK is in the OFF or
LOCAL position as a useful indication that the remote interface is connected and opera-
tional.
5.8 HV OFF/Reset (Ref 7)
The HV OFF push-button turns OFF the HV output when depressed. This push-button
will illuminate and stay illuminated when depressed (HIGH VOLTAGE is OFF). The HV
OFF push-button will always operate even with the KEY LOCK in the remote position.
The HV OFF push-button switch will FLASH continuously when the HV output has been
turned OFF automatically by a latching fault. Latching faults include INTERLOCK
OPEN, HIGH AC input, and IMBALANCE. These faults may be reset by depressing the
flashing HV OFF push-button after the fault condition has been cleared, INTERLOCK
closed, etc.