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JB INDUSTRIES
• DV-22N Operating Manual • 630.851.9444 • [email protected]
Display Resolution (HI RES)
The Display Resolution menu determines whether pressure will be shown at high resolution. High resolution
means that pressure is shown as-is, in one unit increments. When the setting is OFF, the reading display is
rounded.
Available settings are: ON, OFF.
Factory default setting is “OFF”.
From the HI RES sub menu:
1. Press the ENTER button to scroll through available options.
2. To select and store an alternate option as a new setting, press and hold the ENTER button for three seconds
on the selected option. Unit will display “STORED” and save your selection.
3. Press POWER button once to cancel and return to main menu. Press POWER button twice to exit and return
to normal operation mode.
Note: Even if high resolution display is selected ON, pressure values above 1000 microns will be rounded off
according to the current display pressure.
Auto Shutdown (AU-0FF)
To conserve battery life, the DV-22N will power off automatically after 30 minutes of inactivity.
Available settings are: OFF, 10, 15, 30, 45, 60, or 90 minutes.
Factory default setting is “30” minutes.
From the AU--OFF sub menu:
1. Press the ENTER button to scroll through available options.
2. To select and store an alternate option as a new setting, press and hold the ENTER button for three seconds
on the selected option. Unit will display “STORED” and save your selection.
3. Press POWER button once to cancel and return to main menu. Press POWER button twice to exit and return
to normal operation mode.
Note: Even if auto-shutdown has been deactivated, a low battery condition will power off the DV-22N.
Connection Instructions
It is recommended to connect the DV-22N gauge hose directly to either the high or low side of the system for
the most accurate reading.
To check for a leak using the vacuum pump blank-off valve: a metal hose, o-ring coupler or copper tubing must
be used. Standard hoses permeate and will not hold a vacuum. The gauge reading will increase naturally due
to equalization of pressure. Reading should hold for a minimum of five minutes—a continual increase may
indicate a leak within the system.
MAINTENANCE
Cleaning Vacuum Sensor
1. Fill brass sensor fitting with a few drops of isopropyl alcohol.
2. Cover the opening with a finger and gently shake to allow alcohol to rinse the sensor.
3. Pour out alcohol and allow sensor to dry for 20 minutes before using gauge.
