ISC Meg Modifications

[ahereng]

I have never had any problem with drainage of the head-batteries on my Meg15, and I have had it since new fall of 2015.
That beeing said, I have on a very few occasions forgotten to set the setpoint to manual(0,21) after the dive, and if I have accidentally touched the wet-switch without noticing the unit will turn on and try to bring up the po2 to 0,7 which is kind of hard to do when the loop is disconnected and the unit is open. That will drain the batteries in the head and controller to the very bottom, but I view these as user-errors. I think maybe the unit woke up easier with the original controller, I now use the Remora-controller but I am also better at checking that the unit is actually off before I leave it in the basement.

 

[mr_v]

I have never had any problem with drainage of the head-batteries on my Meg15, and I have had it since new fall of 2015.
That beeing said, I have on a very few occasions forgotten to set the setpoint to manual(0,21) after the dive, and if I have accidentally touched the wet-switch without noticing the unit will turn on and try to bring up the po2 to 0,7 which is kind of hard to do when the loop is disconnected and the unit is open. That will drain the batteries in the head and controller to the very bottom, but I view these as user-errors. I think maybe the unit woke up easier with the original controller, I now use the Remora-controller but I am also better at checking that the unit is actually off before I leave it in the basement.

How do you like Remora?

Once I cross 100 hours on the 15, I'll write something up. I enjoy APECS4 and find it better than Shearwater in some areas, like button positioning, wifi updates, and screen scrolling. The only thing that I don't enjoy is new gas definition and selection -- too many clicks. I am open to buying a Remora but not sure if the upgrade is worth it.

 

[ahereng]

The fact that is uses aa-batteries was the primary reason for buying the Remora.
I like the form factor better on the Apecs4. It's sometimes difficult to turn the handset on when wearing multiple layers of gloves, that was easier on the Apecs where the buttons had more space between them and slightly angled.
I didn't have the Decoman-software on the Apecs, but that came with the Remora.
I like the fact that the decoman-software calculate how much of your bailout you have "used" during the dive, it seems to do this quite good.

 

[mr_v]

Has anyone ordered Tough Loop covers for the standard Meg loop? If so, could you please share the measurements or DM me your name/order # so that Patrick can duplicate?

Thank you!

 

[mr_v]

Folks, if you run buna o-rings on your t-pieces, could you please share the specs? I have spec'ed the following:

3.55 mm (Wide), 45 mm (ID), 52.1 mm (OD)

Duro 70

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

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Fits a bit tighter than the stock silicone o-rings. We'll see how it works IRL soon. Thank you!

 

[Borebrush]

Can someone bring me up to speed on the differences between M15 and Tiburon? Other than incorporating Shearwater electrics, what other design changes were made that are not as obvious? Any pros/cons vice the other?

 

[211ratsbud]

Can someone bring me up to speed on the differences between M15 and Tiburon? Other than incorporating Shearwater electrics, what other design changes were made that are not as obvious? Any pros/cons vice the other?

The engineering between them is identical

The differences are only down to the ancillary changes required to install 3rd party electronics. Such as external accessability to a 3.6v battery on the Tiburon vs internal 9v on the 15 ( which is similar to the 2.7 ).

The pro's and cons are intensely subjective.

I will add that SW electronics are common among whuch allows more people the ability to use the same diving software and UI. This is potentially a positive.

ISC Electronics definitely have some positive features. Also the simplicity of the unit manufacturing and controls by the same company.

 

[Borebrush]

The engineering between them is identical

The differences are only down to the ancillary changes required to install 3rd party electronics. Such as external accessability to a 3.6v battery on the Tiburon vs internal 9v on the 15 ( which is similar to the 2.7 ).

The pro's and cons are intensely subjective.

I will add that SW electronics are common among whuch allows more people the ability to use the same diving software and UI. This is potentially a positive.

ISC Electronics definitely have some positive features. Also the simplicity of the unit manufacturing and controls by the same company.

I got my m15 head in 2015 and have not had issues and really did not take note of the Tiburon other than the switch to SW control electronics. I have not read this thread stem to stern yet but I saw something about an inlet hose modification I think, which prompted my q. Thanks for the quick response.

 

[211ratsbud]

I got my m15 head in 2015 and have not had issues and really did not take note of the Tiburon other than the switch to SW control electronics. I have not read this thread stem to stern yet but I saw something about an inlet hose modification I think, which prompted my q. Thanks for the quick response.

It's the same inlet tube for both Tiburon and Meg 15. I had it installed in my meg 15.

Feels like it should have been there from the start

 

[mr_v]

Meg 15 was a great idea that, in my professional experience, could have used a few more months of R&D. It is a good unit as-is, but with additional effort, it could have been a mind blowing rebreather.

The schematics from Meg 15 manual are below (credit ISC):

I like Apecs 4 better than Shearwater in many ways: Good button placement, deco planning, rechargeable batteries, over the air updates. The ability to configure the unit via a web browser is a plus. However, gas definition and switches are better in Shearwater.

Battery drainage happens with compromised attached devices, e.g., water damaged HUDs may drain the batteries. ISC addressed the issues.

There are a few things that ISC could have improved, but that's a subject for another conversation.