Difference btw Sport, 2 and Plus

OSTC's running hwOS sport or tech
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MBaadsgaard
Posts: 10
Joined: Wednesday 2. February 2022, 21:06

Difference btw Sport, 2 and Plus

Post by MBaadsgaard »

Deciding on my first dive computer and these hover around the budget.
However it is hard to wrap ones head around exactly to what extent they differ.

Besides battery options, case and button type, are there any differences between these options?
jb2cool
Posts: 142
Joined: Tuesday 21. January 2014, 21:19

Re: Difference btw Sport, 2 and Plus

Post by jb2cool »

They all run the same software, the difference is in the hardware (buttons, battery etc.)
MBaadsgaard
Posts: 10
Joined: Wednesday 2. February 2022, 21:06

Re: Difference btw Sport, 2 and Plus

Post by MBaadsgaard »

And how about the "guts"? Beyond the battery I guess.
It strikes me as whatever I choose I won't be missing anything I can't have added for the same price on either.
I just have to choose between the button type (A question of reliability?),
the size of the thing and whether batteries can be exchanged (Convenience and.. Ehm... "style points" I guess).
jb2cool
Posts: 142
Joined: Tuesday 21. January 2014, 21:19

Re: Difference btw Sport, 2 and Plus

Post by jb2cool »

Battery capacity too

I think the:
sport uses disposable batteries only
Plus has a small rechargeable battery but can take disposable batteries too
2 has a much larger rechargeable battery

Plus can come in nice colours, 2 is black only, I don’t know about the sport, I’ve only seen silver.
MBaadsgaard
Posts: 10
Joined: Wednesday 2. February 2022, 21:06

Re: Difference btw Sport, 2 and Plus

Post by MBaadsgaard »

Yea it is unclear whether the battery in the Plus is one you replace with an AA if you need to or the AA is in addition to the internal one
(and more as a backup solution on a trip without a charger).

Maybe someone can clarify that..
dadefay
Posts: 115
Joined: Thursday 2. February 2017, 15:39

Re: Difference btw Sport, 2 and Plus

Post by dadefay »

Hi,

The OSTC Plus can be fitted with :
- Rechargeable 3.7 V lithium battery (the best option combined with the induction charger, no need to open the computer).
- Disposable 3.6 V lithium battery.
- Disposable 1.5 V alkaline battery (when nothing else is available on dive site !)

The Heinrichs Weikamp web site could be enriched with a comparison table...

Regards.
Didier A. Defay
OC trimix instructor / Trimix CCR diver
France

OSTC 2 #18835
- OSTC Plus #16077
-- OSTC 3+ #4806
--- OSTC 3 #3999
MBaadsgaard
Posts: 10
Joined: Wednesday 2. February 2022, 21:06

Re: Difference btw Sport, 2 and Plus

Post by MBaadsgaard »

Oh, thanks! Yea that was informative. (And should indeed be on the website).
When you say "can be fitted with" is this by the user or a choice on purchase?
(Since it's sold out I can't see the purchase options on the website)
dadefay
Posts: 115
Joined: Thursday 2. February 2017, 15:39

Re: Difference btw Sport, 2 and Plus

Post by dadefay »

Hi again,

"Can be fitted" means by the user, depending on the type of battery available.

[b]Important update[/b] : in most recent firmware releases, due to the possible risk of confusion with rechargeable batteries, the [b]use of 3.6 V disposable batteries is no more permitted[/b] in the OSTC plus and cannot be selected in the menu !

Kind regards.
Didier A. Defay
OC trimix instructor / Trimix CCR diver
France

OSTC 2 #18835
- OSTC Plus #16077
-- OSTC 3+ #4806
--- OSTC 3 #3999
jb2cool
Posts: 142
Joined: Tuesday 21. January 2014, 21:19

Re: Difference btw Sport, 2 and Plus

Post by jb2cool »

The plus comes with a rechargeable battery installed already, in an emergency you can use a disposable AA battery
Motardplongeur
Posts: 56
Joined: Thursday 13. August 2015, 19:24

Re: Difference btw Sport, 2 and Plus

Post by Motardplongeur »

[quote=MBaadsgaard post_id=23564 time=1643971626 user_id=3048]
When you say "can be fitted with" is this by the user or a choice on purchase?
[/quote]

Up to the user to decide.

One or two years ago, there was some table to compare all models (put into one post, a pdf file) ; and yes, would be great it's updated and put on the Web site

[img]https://i.servimg.com/u/f52/11/95/77/26/hw_com10.jpg[/img]

Whatever your choice, you will enjoy ; clear, simple and robust. What else ?
MBaadsgaard
Posts: 10
Joined: Wednesday 2. February 2022, 21:06

Re: Difference btw Sport, 2 and Plus

Post by MBaadsgaard »

I'm gonna trust the piezo buttons on the 2 and Plus are a noticeable benefit to the push buttons on the sport.
That narrows it down to if I want long battery life or replaceable battery.
(And housing, but that's a matter of taste and I'm sure both are great and either would grow on me).
mail2dirk
Posts: 6
Joined: Monday 13. January 2020, 22:30

Re: Difference btw Sport, 2 and Plus

Post by mail2dirk »

You can order all the computers of hwk just to have a „hands on“! Very very nice service from hwk!
I did it two years ago an switched from my favourite „plus“ to „sport“
Sport has a brighter display and the „non piezo“ buttons seemed to me more reliable than the piezos (take a look in this forum about the issues of piezo)

In my opinion I don‘t need a charger to carry around and to fix with bungees while boat trip…
Just a pair of spare batteries….or put some new in the computer for holidays…can use the old ones at home till empty…
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MBaadsgaard
Posts: 10
Joined: Wednesday 2. February 2022, 21:06

Re: Difference btw Sport, 2 and Plus

Post by MBaadsgaard »

Thanks a lot for the input, all of you.
It sounds like the 2 suits me best. I'd rather be sure to charge it overnight than replace batteries.
That ABS body isn't the nicest looking but I doubt I'll find myself wearing it as a fashion statement :D
harv
Posts: 10
Joined: Sunday 16. January 2022, 11:20

Re: Difference btw Sport, 2 and Plus

Post by harv »

So the Sport has a runtime of up to 100 hours with a 1.5V battery while the Plus has up to 50 hours. Since it mentions that the Sport has a brighter screen I wonder if both of these are due to the transflective screen. I.e. when it's bright you can turn the back light on the Sport down and save battery, while the Plus needs to run with back light turned on higher.

If you're diving in darkness, would the battery runtime and brightness for the Plus and the Sport end up being similar, or is there something else than the transflective screen that gives the Sport higher brightness and more battery life?
Ralph
Posts: 708
Joined: Saturday 24. June 2017, 11:31

Re: Difference btw Sport, 2 and Plus

Post by Ralph »

The sport has an optimzed electronics and the CPU is run on lower voltage, so its base consumption is lower than with any 2 or sport. But the additional current needed to illuminate the screen scales heavily with the brightness setting and is more or less equal on all models.
MBaadsgaard
Posts: 10
Joined: Wednesday 2. February 2022, 21:06

Re: Difference btw Sport, 2 and Plus

Post by MBaadsgaard »

Sorry to necro this. Didn't say thanks for the answers.

Also just to hammer it out in stone:
Between the Sport and Plus,
it's button type (push vs. piezo),
wireless charging and battery life (wireless for Plus, but SPort lasts longer on AA)
and screen on Sport being more visible in daylight.
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