Harris SX-1 - Page 9

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SECTION I
OPERATION
1-1 . INTRODUCTION
1-2. The information contained in this section is intended to familiariz e
the operator with the preoperational setup and the operating procedures for
the transmitter, A thorough . study of the controls and indicators is recom-
mended prior to turn-on and operation. This section also contains tabular
data on the function of each control and indicator with reference illustra-
tions showing their location.
1-3. The preoperational checkout and setup, operati ng procedures for turn-
on and turn-off, and emergency procedures are described.
1-4. PERSONNEL PROTECTION
1-5. Extensive interlocking and safety switches have been provided on
these transmitters because of the low impedance high current capabilities of
the power supplies. The access doors to th e transmitters are provided with
three safety switches. The first safety switch is operated by a small pin
protruding through a hole and, upon opening the door, interrupts the co ntrol
voltage to the prima ry contactors allowing them to deenergize. Upon opening
the door further, a large switch with heavy silver contacts is provided t o
discharge the energy storage capacitors through large resistors for current
limiting. Upon opening the door further a switch operated also by the door
shorts the power supply to the cabinet eliminating any possible voltage re-
maining on the filter capacitors.
WARNING
I
THE NORMAL PROCEDURE IN TRANSMIT-
TER TURN OFF SHOULD BE FOLLOWED IN
DEENERGIZING THIS
TRANSMITTER.
TURN OFF THE HIGH VOLTAGE BY DE-
PRESSING
THE OFF BUTTON. IF YOU
MUST ENTER THE TRANSMITTER, ALLOW
THE POWER SUPPLY TO DISCHARGE AS
INDICATED BY THE FRONT PANEL
METERS . DISCONNECT PRIMARY POWER
SERVICE. OPEN THE DOOR SLOWLY TO
ALLOW THE INITIAL RESISTOR DIS-
CHARGE MECHANISM TO FUNCTION. UP-
ON OPENING THE DOOR FURTHER THE
POWER SUPPLY WILL BE SHORTED TO
GROUND AND MADE SAFE. A GROUNDING
STICK IS PROVIDED IN THE TRANSMIT-
T
ER AND SHOULD BE USED TO ASSURE
THAT ALL VOLTAGE HAS BEEN REMOVED
UNDER FAULT CONDITIONS.
888-2125-001
WARNING: Disconnect primary power prior to servicing.
1-1