8329-300 Series Tenuline® Attenuator
8
Normal Operation
Because the Model 8329-300 attenuator is a passive device and has no indicators or controls, it requires no
operating procedures or surveillance when the performance limits are not exceeded. It should function faultlessly,
absorbing and converting the excess RF energy into heat indefinitely, if it is properly maintained and not subjected
to an overload.
Operation Under Abnormal Conditions
The Model 8329-300 Attenuator is not intended or recommended for outdoor use. The attenuator may be
subjected to moderate overloads for limited periods of time without overheating. However, this should be done
cautiously, and it is strongly recommended that if such a use is contemplated, the attenuator should be equipped
with a thermoswitch.When interlocked with the power line to the source of RF energy, the thermoswitch becomes
a fail safe device to guard the attenuator against the dangers of overheating.
Shutdown
The attenuator, being a passive device, cannot be shut off. The source of RF energy must be cut off instead.
1.
Turn off the source of RF power.
2.
If equipped, let the blower run of at least five minutes to adequately cool the radiator.
3.
If equipped, turn off the blower.
Emergency Shutdown
Turn off the RF power at the source.
WARNING
The vent plug must be used at all times when the unit is in operation or cooling. Failure to
do this could result in damage to the equipment and endanger the operator’s safety. Be
sure to check the plug.
WARNING
Using this attenuator in the upper end of its power dissipation range will cause the housing
to become hot. Care should be exercised in touching it.
CAUTION
This equipment is designed for operation in a horizontal position only, with mounting
brackets down. Do not operate in any other manner.
CAUTION
RF power rating must always be cut in half when the blower assembly is installed but is not
running. Under this condition a 2 kW attenuator will be limited to approximately 1 kW.
WARNING
Never attempt to disconnect the equipment from the transmission line while RF power is
being applied. Leaking RF energy is a potential health hazard.
