SPG Goes Up And Down When Breathing? - Scuba Tech Tips: S15E03
Вставка
- Опубліковано 8 вер 2024
- Is it normal for the Submersible Pressure Gauge (SPG) needle to move up and down while breathing? Alec explains why a bouncing SPG needle is normal and what causes it.
Watch my "Alec Peirce at the Ranch" for ranch and home ideas. / @alecpeirceattheranch
**** Alec Peirce Scuba ****
SCUBA TECH TIPS playlists
▶︎ Series 15: • Scuba Tech Tips - Seri...
▶︎ Series 14: • Scuba Tech Tips - Seri...
▶︎ Series 13: • Scuba Tech Tips - Seri...
▶︎ Series 12: • Scuba Tech Tips - Seri...
▶︎ Series 11: • Scuba Tech Tips - Seri...
▶︎ Series 10: • Scuba Tech Tips - Seri...
▶︎ Series 9: • Scuba Tech Tips - Seri...
▶︎ Series 8: • Scuba Tech Tips - Seri...
▶︎ Series 7: • Scuba Tech Tips - Seri...
▶︎ Series 6: • Scuba Tech Tips - Seri...
▶︎ Series 5: • Scuba Tech Tips - Seri...
▶︎ Series 4: • Scuba Tech Tips - Seri...
▶︎ Series 1, 2 & 3: • Scuba Tech Tips - Seri...
VINTAGE SCUBA playlists
▶︎ Series 10: • Vintage Scuba - Series 10
▶︎ Series 9: • Vintage Scuba - Series 9
▶︎ Series 8: • Vintage Scuba - Series 8
▶︎ Series 7: • Vintage Scuba - Series 7
▶︎ Series 6: • Vintage Scuba - Series 6
▶︎ Series 5: • Vintage Scuba - Series 5
▶︎ Series 4: • Vintage Scuba - Series 4
▶︎ Series 3: • Vintage Scuba - Series 3
▶︎ Series 2: • Vintage Scuba - Series 2
▶︎ Series 1: • Vintage Scuba - Series 1
SEA HUNT REMEMBERED playlists
▶︎ Series 3: • Sea Hunt Remembered - ...
▶︎ Series 2: • Sea Hunt Remembered - ...
▶︎ Series 1: • Sea Hunt Remembered - ...
SEA HUNT COLLECTOR
▶︎ Website: seahuntcollecto...
Alec, nice explanation. Except the SPG is connected to the HIGH PRESSURE side and not intermediate side of the first stage...
Did I say that? Your right.
A
Alec, I'm going to take you up on your offer to introduce a new topic. I've got a great BCD in amazing shape even after a hundred dives over several years (I contribute this to me following your cleaning and care tips). The problem is, I've lost a lot of weight since I bought the bcd and it doesn't fit anymore. The shoulder straps are good, but I can't tighten the cummerbund or straps at the waist to get them tight enough to keep the bcd from shifting on me under water. I don't really have the $800 to buy another bcd just like the one I have in a smaller size right now. I was thinking of just ordering a standard nylon quick release belt, threading it through the bcd so that I can tighten the back of the bcd to my waist. Then I can just connect the BCD waste straps on top of it. You have so much experience I figured you could tell me if this will work or if the problem of the bcd shifting will persist because of the integrated weight pockets. It's an Oceanic QLr4 dive master BCD, if that helps. I appreciate any pointers you could give. Thanks, as always, for the videos and tips; they are incredibly useful.
I had the same problem with regards to losing a lot of weight and so owning a BCD that is now too big for me. I dive with a weight harness (similar strap construction to that on the BCD) with a weight pocket on each side (similar to integrated weight on a BCD) which is worn under the BCD. The shoulder straps of the BCD still fit me and the cummerbund and waist strap can be loosely tightened around my waist/weight harness (which is hanging from my shoulders, just like the BCD). This was fine when we did all of our dives from shore and never surfaced in order to float. UNTIL - one day we did have to surface AND float in deep water. I could not get myself high enough out of the water to be able to remove my second stage. I fully inflated my BCD and it climbed out of the water but I did not. My buddy told me that there were about 6 inches of space between the shoulders of the BCD and my shoulder. What was happening? We recovered from this problem but then had to work out what had caused it. Effectively, I was falling out of the bottom of the BCD. The solution turned out to be an easy one - prevent falling out of the BCD by using crotch straps. These have now been fitted to my BCD and now I do not fall out of the bottom of it.
@Coordinator STS.FreeREG2 thanks for the feedback. That might be another option for me.
A backplate and wing will solve that. The harness is cut to length to your body type by you so that means you can set the shoulder and waist. Any hardware are also positioned by the diver.
In the beginning ...... the first tanks were held on by a basket made from 1" webbing that cradled the tank. There were 2 shoulder straps, 1 chest strap, 1 waist strap & 1 crotch strap. It wasn't comfortable but it did keep the tank in place. It took longer to strap on the tank than to get into your wetsuit!!!
The tank basket was not very secure. The tank tended to flop around. That was solved by putting a tight metal band around the tank. The same diver harness with all the straps was still used.
Next came the backpack, plastic or metal (or homemade wooden ones), which held the tank securely & allowed for less straps - both the chest strap & the crotch strap were eliminated. The straps were usually 2" wide.
When BCDs became common and eventually were attached to the tank rather than being a separate piece of gear, the same hard backpack inside the BCD & with it's straps were used, shoulder straps & a waist strap with a Quick Release buckle.
The nicely padded, Velcro waist band is the latest & nicest style but it does suffer from limited adjustment. Both big & tiny divers have a problem. Big divers can extend the Velcro waistband with commercially made extenders. Tiny divers struggle.
My point to all of this is that you can easily change your BCD waist band to a simple 2" web strap & buckle. It is infinitely adjustable to any waist size & very secure. If you BCD has a hard pack, it's easy. If not, you may have to be innovative but it's the easiest, cheapest & most effective way to solve your problem.
Provided the shoulder straps are still reasonably snug, you're safe & set to go.
Good luck.
Alec
@Alec Peirce Scuba Thank you, Alec, for the thoughtful, thorough response. You've really helped me figure out what my mext steps should be. You really are an incredible resource for novice and experienced divers alike.
Best,
Josh
Mr. Peirce, I got my open water 1 certification in 1986 in Florida and after many years of diving, I stopped when we moved to Georgia and had kids. Now I am getting back into diving and shopping for all new equipment. Also, I plan to do a refresher course and do a couple of dives with an instructor. And yes I'm glad I don't have to use dive tables anymore. I just want to say what a blessing you are for sharing your decades of diving knowledge. I drive a forklift all day at work and listen to you while I work. Thank you so much again for all you do for the sport of diving! All the best Jim from Georgia and say hi to Kevin for me.
Wow! Thanks so much for your kind words & I hope you enjoy scuba for a long time. Scuba diving is one adventure sport that you will NEVER need to give up as you age. Ask me how I know!
Take care.
Alec
Great content as always! Always love to see your videos pop up in my feed!
What? Not my smiling face that makes you happy, ha. Thanks and take care.
A
another cause is a plugged sinterized filter at the entry of the first stage of the regulator, you can say me that it should not happen but in fact, it happens.
We use the same type of material as exhaust silencer on pneumatic equipments and this happens quite frequently that this silencer restricts the flow because they are plugged.
very good video.
Yep. Same problem - restricted air inlet.
Those filters must be changed every year or 25 dives. They cannot be cleaned (I know some divers who try!).
They cost less than $5.
Alec
Actually on the red sea they are still doing the quarter of a turn back after opening, they say this way their tanks are easier to close when you finish the dive...
That maybe fine for the end of the dive but at the beginning, where full air could be very helpful, full on with 2 or 3 fingers works best.
A
Hi Alec You forgot the last thing that could cause this , a dirty or plugged sintered brass filter that is on the input of the reg. Especially with dirty air or a dirty older tank. Not sure about scuba gauges but many air gauges are filled with glycerin to dampen the quick dial changes which can wear out the little gears inside.
Take care Owen m
That is true, now start-up your YT channel so i can retire. Take care Owen.
A
Great video.
Thank you my friend.
A
Hi Alec, didn't you do this video once before, perhaps there's a rift in the Matrix or the fact that my mind plays trics on me, but I believe this was in "Scuba Tech Tips: My Pressure Gauge Moves When I Breath? - S06E11
"
Yes back in 2017. Was asked in viewer comments so did a newer version. I'm still just a pretty.
A
Hey sir can you explain the balanced and non-balanced Regulator
Have a few videos on this subject already. Watch S07E01 Piston vs Diaphragm 1st Stage; S08E14 How A Piston Regulator Works; S07D20 "Regulator Service, Adjust The IP", (1st stage adjustment for diaphragm models). Hope this help answer your questions.
A
Alec is it good for us ? I’m not sure about take dive with this kind of problem… what is your though?
Totally safe to dive with this situation. It's a function of time and pressure. Pressure drops, 1st stage adjusts, pressure rises ( quickly but at low psi it's easy to see).
A
What are those blue and yellow things on the wall?
Those are T handled hex drivers (imperial and metric).
A
👍😎🇵🇭🤿! I haven’t seen anyone in a least the past 30 years use a J valve. I thought most dive shops quit servicing them! Is this correct? Thanks 😎
Finding a shop to service J valves is hard to find. Many vintage divers self-service as they are very simple inside and need little maintenance. I do like to slip in some vintage items (like j-valves) to show new divers how gear has changed for the better.
A