2.2.
To turn supply 2 on (or off), press the bottom
Display Select
key to toggle to the
desired value.
3.
Press the
ENTER
key.
NOTE: If you turn a supply ON and have not set the pump size for that supply, the display
automatically goes to PUMP SIZE menu to allow you to set the value.
4.
When voltage starts to rise above 700V, the pump starts. The roughing pump should
be valved off at this point. If the pump starts to stall when the roughing pump is
valved off (as indicated by a decrease in voltage), the roughing pump should be
valved back into the system. After voltage has increased above 3000V, the display
may be switched to current or pressure display (when starting the pump, the voltage
display mode is more sensitive to pressure changes).
Using the Controls
Display Selection
During normal mode, Supply 1 and Supply 2 displays show either voltage, current, or pressure.
Press the
Display Select
key (Figure III-3) next to each supply to cycle through these choices.
Voltage is the default upon power-up, but you can change it in the Preferences menu. Refer to
the pump display information in section 3,
Display
Select
Figure III-3. DISPLAY SELECT key
Disable and Enable
If you want to disable the keypad, press the
0
key four times in succession during normal mode.
All keys except the
Display Select
keys are disabled. Press the
1
key four times in succession to
re-enable operation.
Keypad
The keypad (Figure III-4) consists of the following keys and are labeled:
0-9
←
(backspace)
ESC
ENTER
The
3
(
Set Points
),
6
(
Bake
),
9
(
High Voltage Operate
), and
←
(
TSP
) keys have program
The
0
key four times within two seconds disables keypad operation.
The
1
key four times within two seconds enables keypad operation.
The blank key is the
Menu
mode key (Figure III-5 and Table III-3).
Digitel MPC Manual
Page 19 of 72
