Bird Technologies 8630B Series - Manual (Page 32)

Bird 8630B Series Moduload RF Load Resistor
16
4. Apply RF power to the load.
Normal Shutdown
1. Turn RF power to the load off.
2. Wait five minutes, allowing pump and blower to return coolant to
ambient room temperature.
3. Turn ac power off.
Note: Stopping the pump automatically opens the interlock
connection.
Emergency
Shutdown
With the use of interlock capability, the Load will automatically turn
off the transmitter’s RF power of an emergency arises.
If an emergency arises that is not a fault of the unit, always turn off
the source of RF power first, and then the ac power to the Load.
Performance
Notes
The electrical performance of the Series 8630 and 8630B RF loads is
affected by impurities or other chemical additives in the cooling
liquid. Therefore, the cooling liquid should be the coolant supplied
with the unit, or distilled water. Do not use any additives.
Thermal performance is affected by impurities, particularly those
which accumulate in the form of scale on the surface of the ceramic
tube and any other water passages. This results in an increase of
thermal resistance of the load, and in turn, may cause the load to
overheat and fail.
CAUTION
Do not disconnect the line power first. Even a momentary
application of RF power to the load while the cooling circulation is
off will cause almost immediate destruction of the resistor element.