HammerHead Revisions and Issues

Andy_C · 22nd August 2006, 10:17

Hi Joe

Don't know if this should be a question here or not but here goes :

Just got hold of a later Hammerhead (think about three months old) & Inspiration to build up and play with, haven't dived it yet but was playing comparing the MV output of the cells on both the handsets. The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board.

Is this typical when showing MV output ?

Also I need to buy some bits from Kevin, what is the best email address to get hold of him ?

Thanks

Andy

diverklondike · 22nd August 2006, 11:03

Andy,

Kevin is on vacation with his family this week and can be found on this list as "heyydude".

You can get his contact information off of www.rebreather.us

If you are in a jam you can call the number on the site and ask for Doug.

He may be able to help you until Kevin gets back.

Dive Safe

Mark

Quote: (Originally Posted by Andy_C)

Hi Joe

Don't know if this should be a question here or not but here goes :

Just got hold of a later Hammerhead (think about three months old) & Inspiration to build up and play with, haven't dived it yet but was playing comparing the MV output of the cells on both the handsets. The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board.

Is this typical when showing MV output ?

Also I need to buy some bits from Kevin, what is the best email address to get hold of him ?

Thanks

Andy

Mark Chase · 22nd August 2006, 11:44

Quote: (Originally Posted by Andy_C)

Hi Joe

Don't know if this should be a question here or not but here goes :

Just got hold of a later Hammerhead (think about three months old) & Inspiration to build up and play with, haven't dived it yet but was playing comparing the MV output of the cells on both the handsets. The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board.

Is this typical when showing MV output ?

Also I need to buy some bits from Kevin, what is the best email address to get hold of him ?

Thanks

Andy

My one is exactly the same. I think one hand set is rounding up the other is rounding down. Dont ask me why.

Note that a cell showing below 9mv in air is unlikley to calibrate it will just show as a failed cell. When ordering cells from AB you have to ask for cells showing a minimum of 10mv in air.

ATB

Mark Chase

henckell · 22nd August 2006, 14:51

Quote: (Originally Posted by Andy_C)

The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board.

I have noticed something during diving that could be caused by a difference between primary and secondary in reading cell outputs.
The problem is that my primary and secondary show the same millivolt reading both in air and pure O2 (within 1 mV, typically 54 and 55 mV or so).
Still when I dive I have a 0.1-0.2 ATA lower ppO2 on my secondary.
Why is that?

heyydude · 22nd August 2006, 16:00

The mV reading on the HH is rounded - you are dealing with mV traveling over 5 feet of 28 awg cable (which has it's own capacitance) - the output can vary slightly from handset to handset, but never more than a couple of mV. (and never enough to affect life support)

The mV display is meant as a guide to help you determine the relative health of your sensors, or the thoroughness of your loop flush prior to calibration.

If you want to know the exact mV output from your sensor, to a ten thousandth of a volt, I suggest you buy a Fluke ScopeMeter 123 for around $1,200 - this will help you confirm that while your Hammerhead is telling you "11mV" for a particular cell, it is in reality "10.995"

Henrik - you should call me on Monday.

And yes, the beach here in N.C. is beautiful. Why am I sitting here writing this post instead of playing with my kids??!! Gotta go!

See ya,

Kevin.

chucky05 · 23rd August 2006, 03:37

I am having trouble with my HH's shutting down. I wash the units with warm fresh water and am often finding they are still on 6-10 hours later. I have even tried a hair dryer but to no avail. My only solution has been to wait until all my diving id over and then remove the batteries. Can anyone suggest something or do I have a problem with my handset's.
Thanks

Bazza · 23rd August 2006, 03:42

John .... suggest you contact Tony Davis, the local DiveRite Rep he's the one that handles all the Optima problems in Oz.

regards Baz

chucky05 · 23rd August 2006, 05:24

Barry,
As you know this is a Jurgensen problem/issue. But thanks for your input.
John

***jradomski*** · 23rd August 2006, 05:39

Quote: (Originally Posted by chucky05)

Barry,
As you know this is a Jurgensen problem/issue. But thanks for your input.
John

diverite is handing many of the simple repairs.. your issue may only require having the bezel swapped or modified.. if yours is properly showing you are on the surface, all yours probably need is the hole (in the bezel) around the wetswitch enlarged. some units are a bit too sensitive to any residue in the area between the bezel and the ws.

diverite has been given many spare parts.. DR is supposed to be the first point of contact.. If it cant be ressolved by them THEY send it to JM..

People who purchased directly from JM would contact him, if it were purchased by a rep contact should be to that rep..

Bazza · 23rd August 2006, 05:49

Is it a problem for Kev I believe not!

If you are having problems with a new cars brakes you don't go direct to the brake manufacture do you.

Myself as a retailer of HH in Oz would not expect you to knock on my door with a HH problem on an Optima, I would advise you to report the problem to the DiveRite supplier, its only good manners.

I have offered DiveRite my help out here in Oz but have been told to butt out as it is a DiveRite problem and may affect warranty.

You problem is small in nature and I believe simple to fix but the fix would have to be sanctioned by DiveRite as it may void your warranty.

Worth the advice don't you think or are you happy to start drilling into your new Optima handsets based on info gleaned from the internet??

Just my two bobs worth, most of this stuff can be resolved by a good DiveRite rep and don't need Kev's time.

regards Baz

22nd August 2006, 10:17	#51 (permalink)
Andy_C New Member Current Rebreather/s: Inspiration Classic Classic Kiss Other Rebreather/s: Join Date: Dec 2005 Location: Stourbridge/West Mids/UK Posts: 34	Re: HammerHead Revisions and Issues Hi Joe Don't know if this should be a question here or not but here goes : Just got hold of a later Hammerhead (think about three months old) & Inspiration to build up and play with, haven't dived it yet but was playing comparing the MV output of the cells on both the handsets. The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board. Is this typical when showing MV output ? Also I need to buy some bits from Kevin, what is the best email address to get hold of him ? Thanks Andy
(Offline)

22nd August 2006, 11:03	#52 (permalink)
diverklondike Just one of the Peasants Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Oct 2005 Location: Delaware, USA Posts: 1,604	Re: HammerHead Revisions and Issues Andy, Kevin is on vacation with his family this week and can be found on this list as "heyydude". You can get his contact information off of www.rebreather.us If you are in a jam you can call the number on the site and ask for Doug. He may be able to help you until Kevin gets back. Dive Safe Mark Quote: (Originally Posted by Andy_C) Hi Joe Don't know if this should be a question here or not but here goes : Just got hold of a later Hammerhead (think about three months old) & Inspiration to build up and play with, haven't dived it yet but was playing comparing the MV output of the cells on both the handsets. The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board. Is this typical when showing MV output ? Also I need to buy some bits from Kevin, what is the best email address to get hold of him ? Thanks Andy
(Online)

22nd August 2006, 11:44	#53 (permalink)
Mark Chase I go down for ages Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Jan 2005 Location: Kent Posts: 2,693	Re: HammerHead Revisions and Issues Quote: (Originally Posted by Andy_C) Hi Joe Don't know if this should be a question here or not but here goes : Just got hold of a later Hammerhead (think about three months old) & Inspiration to build up and play with, haven't dived it yet but was playing comparing the MV output of the cells on both the handsets. The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board. Is this typical when showing MV output ? Also I need to buy some bits from Kevin, what is the best email address to get hold of him ? Thanks Andy My one is exactly the same. I think one hand set is rounding up the other is rounding down. Dont ask me why. Note that a cell showing below 9mv in air is unlikley to calibrate it will just show as a failed cell. When ordering cells from AB you have to ask for cells showing a minimum of 10mv in air. ATB Mark Chase __________________ Is it supposed to make that noise ? I took my unit to the dive shop and demanded they bolt on every thing that would fit. Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System
(Online)

22nd August 2006, 14:51	#54 (permalink)
henckell New Member Current Rebreather/s: Megalodon Classic Kiss Other Rebreather/s: Join Date: Aug 2005 Location: Sweden Posts: 90	Re: HammerHead Revisions and Issues Quote: (Originally Posted by Andy_C) The primary shows 9 10 11 mv's yet the other shows a straight 10 across the board. I have noticed something during diving that could be caused by a difference between primary and secondary in reading cell outputs. The problem is that my primary and secondary show the same millivolt reading both in air and pure O2 (within 1 mV, typically 54 and 55 mV or so). Still when I dive I have a 0.1-0.2 ATA lower ppO2 on my secondary. Why is that?
(Online)

22nd August 2006, 16:00	#55 (permalink)
heyydude King of the Geeks Current Rebreather/s: MK 15.X Optima Other CCR Other Rebreather/s: Other CCR Join Date: May 2005 Location: Addison, Pennsylvania Posts: 352	Re: HammerHead Revisions and Issues The mV reading on the HH is rounded - you are dealing with mV traveling over 5 feet of 28 awg cable (which has it's own capacitance) - the output can vary slightly from handset to handset, but never more than a couple of mV. (and never enough to affect life support) The mV display is meant as a guide to help you determine the relative health of your sensors, or the thoroughness of your loop flush prior to calibration. If you want to know the exact mV output from your sensor, to a ten thousandth of a volt, I suggest you buy a Fluke ScopeMeter 123 for around $1,200 - this will help you confirm that while your Hammerhead is telling you "11mV" for a particular cell, it is in reality "10.995" Henrik - you should call me on Monday. And yes, the beach here in N.C. is beautiful. Why am I sitting here writing this post instead of playing with my kids??!! Gotta go! See ya, Kevin.
(Offline)

23rd August 2006, 03:37	#56 (permalink)
chucky05 Optima Pilot Current Rebreather/s: Optima Dolphin Other Rebreather/s: MK 15.X Dolphin Join Date: Apr 2005 Location: Melbourne, Australia Posts: 37	Re: HammerHead Revisions and Issues I am having trouble with my HH's shutting down. I wash the units with warm fresh water and am often finding they are still on 6-10 hours later. I have even tried a hair dryer but to no avail. My only solution has been to wait until all my diving id over and then remove the batteries. Can anyone suggest something or do I have a problem with my handset's. Thanks __________________ John Allsop Optima Pilot from the Land Down Under SSI Instructor Certifier TDI/SDI Instructor
(Offline)

23rd August 2006, 03:42	#57 (permalink)
Bazza New Member Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution rEvo Other CCR Dolphin Other Rebreather/s: Prism Topaz Sport Kiss Classic Kiss MK 15.X rEvo Other CCR Dolphin Join Date: Feb 2005 Location: Australia Posts: 167	Re: HammerHead Revisions and Issues John .... suggest you contact Tony Davis, the local DiveRite Rep he's the one that handles all the Optima problems in Oz. regards Baz
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23rd August 2006, 05:24	#58 (permalink)
chucky05 Optima Pilot Current Rebreather/s: Optima Dolphin Other Rebreather/s: MK 15.X Dolphin Join Date: Apr 2005 Location: Melbourne, Australia Posts: 37	Re: HammerHead Revisions and Issues Barry, As you know this is a Jurgensen problem/issue. But thanks for your input. John
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23rd August 2006, 05:39	#59 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,992	Re: HammerHead Revisions and Issues Quote: (Originally Posted by chucky05) Barry, As you know this is a Jurgensen problem/issue. But thanks for your input. John diverite is handing many of the simple repairs.. your issue may only require having the bezel swapped or modified.. if yours is properly showing you are on the surface, all yours probably need is the hole (in the bezel) around the wetswitch enlarged. some units are a bit too sensitive to any residue in the area between the bezel and the ws. diverite has been given many spare parts.. DR is supposed to be the first point of contact.. If it cant be ressolved by them THEY send it to JM.. People who purchased directly from JM would contact him, if it were purchased by a rep contact should be to that rep.. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by jradomski : 23rd August 2006 at 06:13.
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23rd August 2006, 05:49	#60 (permalink)
Bazza New Member Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution rEvo Other CCR Dolphin Other Rebreather/s: Prism Topaz Sport Kiss Classic Kiss MK 15.X rEvo Other CCR Dolphin Join Date: Feb 2005 Location: Australia Posts: 167	Re: HammerHead Revisions and Issues Is it a problem for Kev I believe not! If you are having problems with a new cars brakes you don't go direct to the brake manufacture do you. Myself as a retailer of HH in Oz would not expect you to knock on my door with a HH problem on an Optima, I would advise you to report the problem to the DiveRite supplier, its only good manners. I have offered DiveRite my help out here in Oz but have been told to butt out as it is a DiveRite problem and may affect warranty. You problem is small in nature and I believe simple to fix but the fix would have to be sanctioned by DiveRite as it may void your warranty. Worth the advice don't you think or are you happy to start drilling into your new Optima handsets based on info gleaned from the internet?? Just my two bobs worth, most of this stuff can be resolved by a good DiveRite rep and don't need Kev's time. regards Baz
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