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Regulator test rig you don't need to suck.

Discussion in 'Making your own Gear' started by njmorrell, Nov 27, 2018.

  1. njmorrell

    njmorrell Captain

    # of Dives: 1,000 - 2,499
    Location: Miami, FL.
    66
    42
    Here is a photo of my test rig, it uses a small vacuum pump (Parker Pumps) to provide the 'suck' with a simple PWM speed control and water manometer to measure the pressure. It gives a nice steady reading of the pressure required to crack the 2nd stage.

    IMG_2031.JPG
     
  2. 2airishuman

    2airishuman Solo Diver

    # of Dives: 100 - 199
    Location: Greater Minnesota
    2,613
    1,869
    Nice. I use the kitchen sink
     
  3. njmorrell

    njmorrell Captain

    # of Dives: 1,000 - 2,499
    Location: Miami, FL.
    66
    42
    Ha ha, yes I used to use the bath tub.
     
    Dark Wolf likes this.
  4. Scuba Scott

    Scuba Scott Instructor, Scuba ScubaBoard Supporter

    378
    284
    What are you using for the tube you are inserting into the mouthpiece?
     
  5. njmorrell

    njmorrell Captain

    # of Dives: 1,000 - 2,499
    Location: Miami, FL.
    66
    42
    1" OD latex tube. Fits very nicely into the mouthpiece without having to take the mouthpiece off the 2nd stage..
     
    Scuba Scott and Dark Wolf like this.
  6. Bob DBF

    Bob DBF Solo Diver

    # of Dives: I just don't log dives
    Location: NorCal
    10,785
    16,729
    Sweet.

    I'm going to rethink the bucket of water.

    Bob
     
    dead dog and Dark Wolf like this.
  7. northernone

    northernone Contributor Rest in Peace ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Currently: Cozumel, from Canada
    3,792
    3,411
    Nice looking project. Bet it is satisfying to put to use.

    Do you find the ability to maintain a steady suction without fluctuation lends itself to a better adjustment?

    I see the appeal!
    Cameron
     
    Dark Wolf likes this.
  8. njmorrell

    njmorrell Captain

    # of Dives: 1,000 - 2,499
    Location: Miami, FL.
    66
    42
    I'm not sure yet about better adjustment but it certainly enables better accuracy. For example I am able to discriminate between two identical Aqualung legend 2nd stages, one measures 7/8" wg and one measures 1" wg. That's 1/8" difference which is 1/16" on each side of the manometer.

    I checked all my regs after I finished the test rig and all are within manufacturer's specification so I haven't actually done any adjustments
     
  9. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
    1,936
    1,577
    very cool id like one too
     
  10. flyboy08

    flyboy08 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: NYC
    3,882
    2,756
    May I place an order for one Flux Capacitor please? You guys amaze me!
     
    Pressurehead and Andrew Dawson like this.

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