Units Screen; Gas Ballast Control (E2M1.5); Figure 16 Units Screen - Edwards T-Station 300 Instruction Manual

Table 17 Calibrate gauge screen key actions
Keys
START
ENTER
NEXT

6.2.6 Units screen

When the units screen is selected, the menu LEDs are unlit and the currently selected
units LED is lit. The numeric display is blank.
To change the units press the ENTER key and use the NEXT key to choose between mbar,
Torr, Pa and voltage. Press the ENTER key again to confirm the selection. Note that when
voltage is selected the display shows " 0.000".
When the units are changed, the setpoint values will be converted to the new units. For
example, if a setpoint threshold is entered as 1.0 x 10
to Torr, then the value will be displayed as 7.5 x 10

Figure 16 Units screen

Table 18 Units screen key actions
Keys
START
ENTER
NEXT

6.3 Gas ballast control (E2M1.5)

Use the gas ballast control to change the amount of air (or inert gas) introduced into the
low vacuum stage of the pump. This will prevent the condensation of vapours in the
pump. The condensates can contaminate the oil.
Close the gas ballast control to pump dry gases and to achieve ultimate vacuum.
Turn the gas ballast control six turns anti-clockwise to open it fully. Open the gas ballast
control to pump high concentrations of condensable vapour.
When operating the pump with the gas ballast control open, there will be an increased
rate of oil loss from the pump.
D39595880_A
D39595880_A - Operation
Short press
Go to turbo screen
Calibrate gauge
Go to units screen
Short press
Go to turbo screen
Enter edit mode, or con-
firm selection
Next units option, or go
to turbo screen
Page 32
Long press
-
-
Scroll through menu screens
-3
mbar and the units are changed
-4
Torr.
Long press
-
-
Scroll through units in edit mode, or scroll
through menu screens
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