Edwards EXT70 - Operation

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BX bakeout band
B580-65-880 Issue G
2.4 Operation
CAUTION
Do not allow the temperature of the EXT pump envelope to rise above 100 °C, whether you use the BX bakeout
band on its own or with bakeout heaters on your vacuum system.
When you use the bakeout band, ensure that there is adequate cooling for the pump and adequate ventilation for
the bakeout band.
If you use an EXC120, EXC300 or EXC300M Controller to power the BX bakeout band, the operation of the BX bakeout
band is controlled from the 'Heater' switch on the front panel of the EXC Controller. The 'Heater' switch is interlocked
with the 'Start/Reset' switch and the pump 'Normal' indication; the bakeout band is switched off automatically if the
EXT pump is overloaded.
Refer to the EXC Controller instruction manual for additional information.
If you have connected the bakeout band to a TIC Relay Box, refer to the TIC instruction manual for instructions on
how to use the TIC to control the operation of the bakeout band.
WARNING
Do not operate the BX bakeout band when it is not installed on a pump. Without the cooling effect
of the pump-body, the temperature of the band can rise to 300 °C with the danger of insulation
breakdown and fire.
WARNING
Do not touch the BX bakeout band when it is switched on, as it can get very hot during operation.