Welch Vacuum 2028 Self-Cleaning Dry Vacuum System User Manual
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3.33 Vacuum Gauge / System Control Function for Model 2028
A digital vacuum gauge is incorporated into the model 2028 vacuum system. The digital gauge is an
absolute gauge located in the top front section of the Self-Cleaning system. The unit of measurement is
preset during production.
VENT
MODE
Press VENT button to enter VENT mode
Note: the gauge will not display atmospheric pressure.
The pump will automatically go into vent mode when the pump is turned on. VENT Mode
is the central mode to allow the user to enter MENU, AUTO, MANUAL and MAXIMUM
VACUUM modes. VENT mode allows the user to quickly remove the vacuum setting on
an application and vent the system. All programs are quickly accessible in VENT mode
by pressing the numeric keypad for each program number.
Example:
Keypad
#
Program
#
0
Repeat
Previous
Setting
1
1
2
2
3
3
4
4
5
5
Note: Press the ENTER button to run the selected program
MANUAL
MODE
Press MANUAL button to enter MANUAL mode
MANUAL mode gives you full control of the vacuum setting by manually opening/closing
the variable valve with each turn of the Vacuum Control knob. The linear bar graph
displays the valve position. Push the Vacuum Control knob to lock in your desired
vacuum setting and switch to AUTO mode. AUTO mode will display the exact vacuum
setting and allow you to use all AUTO mode functions.
Note: MANUAL mode defaults to the valve open (vent) position when pressed except
when in MAXIMUM VACUUM mode where the valve will be in the closed (max vac)
position.
AUTO MODE Press AUTO button or Vacuum Control knob in MANUAL mode to enter
AUTO mode AUTO mode gives you precise control of the vacuum setting via Up/Down
arrows, numeric Keypad and the Vacuum Control knob. The bottom right of the display
shows the set vacuum setting. The initial vacuum setting must be set via the numeric
key pad and enter button. Once the initial value has been entered the Up/Down arrows,
Numeric Keypad and the Vacuum Control knob will all allow precise vacuum control in
AUTO mode. The only exception is when the users switches from MANUAL mode to
AUTO by pushing the Vacuum Control knob
(See MANUAL mode).