Isoprime User’s Guide
Version 1.02 IsoPrime100 User’s Guide Page 74 of 219
If a dual inlet is fitted, the dual inlet must be vented independently. See Dual Inlet manual for
instruction.
It is recommended that the source be switched off before venting. If the pump is turned off
while the source is on, the source will automatically be turned off but the filament may be
damaged.
The turbo will slow down until the pump speed is 50%. At this point the vent valve will be
automatically opened and the turbo will slow rapidly as the pressure in the analyser rises.
The Penning gauge pressure is displayed in the IP High Vac panel when the pumping
is switched on and the turbo is at full speed. At other times, the message Gauge Off
is displayed.
The Pirani gauge pressure is displayed in the IP Low Vac panel. This is
the pressure of the backing line between the Speedivalve and the turbo pump.
Edwards active gauges produce error codes in the event of a failure. Consult the manufacturer’s
manual for more information.
TUNING CONTROL
SOURCE CONTROL
The source is controlled via the Instrument menu. Check Source On to turn on the source.
When the source is switched off, the Source Status bar in the Display panel of the tune page is
coloured red, and the source off message is displayed. When the source is switched on, the bar
turns green and the source status changes to operational
.
In the image above, the source is clearly on (green bar) and the source status is Operational.
When turning the source on, it may take a short period of time for the source to become
operational. This is due to a slow rise in the filament emission to protect the filament. If the
source is not operational after a number of minutes there may be a problem.
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