Welch Vacuum 2028 Self-Cleaning Dry Vacuum System - Manual (Page 10)

3.30 Vacuum Gauges / System Control Functions
3.31 Analog Vacuum Gauge for Models 2025 and 2026
A dial vacuum gauge is incorporated in the vacuum system 2025 and 2026. The dial gauge is located
in the top front section of the system. The dial vacuum gauge is commonly used to indicate vacuum
level when operating in the rough vacuum range (2 torr, 2.7mbar, 29.8 in Hg). Dial vacuum gauges
give negative pressure - That is pressure below atmospheric. The reference point for the gauges is
atmospheric pressure.
Please keep in mind that atmospheric pressure tends to vary from day to day. As a result of this
variability, a dial vacuum gauge will indicate slightly different maximum vacuum readings from day to day.
3.32 Vacuum Gauge / System Control Function for Model 2027
A digital vacuum gauge is incorporated into the model 2027 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.
Unit Set Up
Plug power cord from unit into wall outlet, press POWER and VENT;
hold down until the MENU SCREEN is displayed.
Using the Menu
To use the menu, scroll through the menu options, using the VENT button.
To select the menu options, using the POWER button.
Change Units
To change pressure read out units, select through the MENU SCREEN:
SETUP > SET UNITS.
Select Units
To set units, chose the appropriate unit from the SELECT UNITS SCREEN.
10