Altronic 6715 D Manual - Página 9

Navegue en línea o descargue pdf Manual para Equipamiento industrial Altronic 6715 D. Altronic 6715 D 20 páginas. Coaxial load resistor

switch is "ON" or when one of the fan thermostats senses a temperature equal to or greater

than 120° (± 7°) F.

The transmitter interlock circuit consists of two thermal switches wired in series to control

the interlock relay. Power is supplied to this relay whenever the equipment is attached to

the correct power supply and the motor temperature senses a temperature equal to or less

than 160°F and the resistor compartment temperature switch senses a temperature equal to

or less than 250°(±7°)F. A lamp is provided to indicate when one or more of the over-

temperature switches opens. It is labeled "OVERHEAT", indicating a change in state of

the interlock.

1-6. Mechanical Description. The Model 6715D RF Coaxial Load is a 50-ohm non-reactive

resistor assembly which is cooled by forced ambient air. The blower assembly is a 1/3 HP

direct-drive centrifugal blower depending on the voltage rating of the load. The blower

moves air from floor level into a closed plenum surrounding the resistor assembly. Air then

enters the resistor assembly and flows downward through it to the transition duct and then

out of the enclosure via the discharge grill. This places the RF input connector at the

coolest point in the air stream and affords exceptionally quiet operation.

1-7.

General Principle of Operation. After ascertaining that the Model 6715D is connected

to the correct power supply, connect the transmitter interlock circuit and RF source. Turn

the main power switch ON to start the fan and enable the transmitter. Operate the

transmitter as desired. To stop operation, it is necessary to first turn off the transmitter,

then the main power switch on the Model 6715D. The fan may continue to run for some

time. This depends upon the power level at which the load was operating and upon the

ambient air temperature. This feature is necessary to prevent damage to the load. The

Model 6715D can be operated in a "Standby" or "Reject" mode with the blower off.

Current draw in this mode is 60 milliamperes. To operate in this mode, connect the unit

as before and leave the main power switch on the front panel "Off". It is highly

recommended that the normally open pair on the interlock terminal board be used to

control a user-supplied alarm circuit. This pair will close on power failure or overheat

and the alarm, if independent of the AC power supply for the unit, will notify the

operator of a fault.

1-8.

Operating and Adjustment Controls. The only operating control is the main power

switch. No field adjustments are necessary or possible.

6715D/Rev. Jul.2020

Page 9

Altronic Research Inc.