Running Manual Vacuum Leak Tests

Objective: To provide guidance on using the tech pane

 

Step 1:

Log in as Technician with 741963 as the login code.  This will allow you to access the Tech Pane drop down tab.

• Go to the Tech Pane

Step 2:

Tech Pane Automated Vacuum Tests

 In the lower right of tech pane, you will see a gray ”test” button.  Selecting that button will display some automatic test for you to run.

 

• Chamber Leak will draw max pressure on the fill chamber, hold it for 10 seconds and check to see if there is any decay.  No decay is preferred but .1 in/Hg is acceptable.
• Separator Vacuum is used to check the pressure at the separator and see the amount of pressure decay over a 10 second timeframe.  Less than 2 in/Hg per 10 seconds is acceptable

Step 3:

Manual Vacuum Tests

If the automatic tests fail, performing them manually can help identify the issue.  Return to Tech Pane to perform the following.

 

• Manual Separator leak test
• All valves should be red or closed, turn on Vacuum pump and wait until pressure maxes out @ Separator.
• Once the max pressure is reached, turn off vacuum pump and count the decay rate.  Shouldn’t more than .2 in/Hg per second
• If test fails, check the following
• Separator secure to blue top with O ring properly seated in sump, not blue top.
• All tubes connected to separator
• From water trap
• From waste vacuum manifold
• To vacuum Wand
• To drain (bottom elbow)
• Vacuum wand connection
• waste vacuum manifold connections
• Drain valve left open

• Manual Chamber leak test
• Close chamber door
• Close all valves EXCEPT vacuum valve
• Wait until Chamber reaches max pressure and turn off or close Vacuum valve.
• Check decay rate.  No more than .1 in/Hg over 10 seconds.
• If leak is excessive, check the following
• Cracks in chamber door (inside seal – cracks around the handle are okay outside the seal)
• Damage to seal or improper installation
• Screws securing seal not installed correctly (screw head too high, too low or crooked)
• Injector holster loose @ back of chamber
• Loose or defective fittings:
• Where Injector line attaches to back of fill chamber
• Back of chamber where dispense lines attach.
• Dispense lines on rotary valves PORT C.
• Loose or damaged connections @ waste or primary vacuum manifold.

Step 4:

• After all leaks have been corrected adjust pressure to recommended specs.
• If pressure is not at 15.5 in/Hg, use the regulator to adjust. Turn it clockwise to increase reading.  Note, there is a brief delay from turning the knob to the readings on the screen.

 

 

RIS