Control
Power
HV Enable
Keypad
STBY
OPER
CMD
VOLTS
CURR
PRESS
SP 1, SP2, BAKE
0 through 9
ENTER
Display
Rate of Rise
3-2
Operation
Table 3-2. Front Panel Controls and Indicators
Description
Tums main power on and off. The switch is on and illuminated
when it is flush with the bezel.
This switch is normally enabled (flush with the bezel). If it is
off, high voltage cannot be generated. If enabled, it lights
continuously if high voltage is on and flashes if high voltage is
off.
Used as the primary method for controlling the DIGITEL.
Places the DIGITEL in standby mode if high voltage is enabled.
The HV enable indicator flashes.
Places the DIGITEL in operate mode if high voltage is enabled.
The HV enable indicator lights continuously.
Used to enter special commands that control the computer
interface, setpoint operation, and service features.
Places the display in voltage mode.
Places the display in current mode.
Places the display in pressure mode. When this key is first
pressed, the display momentarily flashes either torr or pascal to
indicate the units displayed. The DIGITEL must be configured
correctly for this mode to read properly (Subsection 3.2.2).
These keys control the setpoint and bakeout operation. The
indicators to the right of each key lights when that particular
setpoint relay closes (Subsection 3.9).
The keypad is in the numeric mode if one of the display digits is
flashing, otherwise it is in the command mode.
Used to enter numeric data. If the bakeout option is installed,
press this key while in command mode to momentarily display
the number of hours remaining in the bakeout cycle.
Displays the voltage, current, or pressure, as well as error and
informational codes, setpoints and control parameters.
Gives an indication of the pressure trend within the vacuum
system. Green lamps indicate a pressure decrease and red lamps
indicate a pressure increase.