Micromass Quattro Ultima, User Manual

Page: 43 / 227

The Vacuum LED shows a steady amber.
Acquisition continues, although no mass spectral data are recorded.
When the pressure recovers, the voltages are restored and the Vacuum and Operate
LED’s are steady green.
Any further deterioration of the system vacuum results in a pump fault and the system
is shut down.
Pump Fault
A pump fault causes the following to occur:
The turbomolecular pumps stop pumping.
On the display the
Vacuum
LED flashes red.
The Operate LED is extinguished.
As the turbos slow down the vent valve opens, the rotary pump switches off and
the system is vented.
The pumps do not switch on again unless requested to do so.
A pump fault can occur as a result of:
•
Over temperature of the turbomolecular pumps.
If the water cooling fails, then the turbomolecular pumps switch off when their
temperature becomes too high.
•
Vacuum leak.
Refer to “Maintenance and Fault Finding” later in this manual.
•
Malfunction of the turbomolecular pumps.
Refer to the pump manufacturer’s manuals.
•
Malfunction of the rotary pump.
Refer to the pump manufacturer’s manuals.
Power Failure
In the event of an unexpected power failure, proceed as follows:
Switch OFF the power to the instrument at the wall mounted isolation switch.
When power is restored, follow the start up procedure as described earlier in this
chapter.
Routine Procedures
Page 43
Quattro Ultima
User's Guide