Visio Electronics Failure

HammerHeadShark · 21st May 2007, 10:05

Hi everybody,
yesterday I was discussing with a friend about the new vision electronics.

He recently esperienced a bad problem: during the pre_dive check the pendant/monitor has shut down and he was not able to move to dive mode any more.

The vendor has declared that this problem is identified ad cannot happen during the dive. (the electronic is now in APD since two weeks)

Starting from this point I discovered (I'm Meg Diver) that the Vision batteries are used one x time and each battery can feed both electronics.

(in the Meg each battery can feed only its own electronic)

So, my question is: if one electronic would increase the energy absorption (due to a short circuit or a general failure of any component) both batteries are going to fail? In this case are both electronics going to shut down together?

Regards

HHS

JD White · 21st May 2007, 12:46

Quote: (Originally Posted by HammerHeadShark)

Hi everybody,
yesterday I was discussing with a friend about the new vision electronics.

He recently esperienced a bad problem: during the pre_dive check the pendant/monitor has shut down and he was not able to move to dive mode any more.

The vendor has declared that this problem is identified ad cannot happen during the dive. (the electronic is now in APD since two weeks)

Starting from this point I discovered (I'm Meg Diver) that the Vision batteries are used one x time and each battery can feed both electronics.

(in the Meg each battery can feed only its own electronic)

So, my question is: if one electronic would increase the energy absorption (due to a short circuit or a general failure of any component) both batteries are going to fail? In this case are both electronics going to shut down together?

Regards

HHS

Well, Interesting post.
Short answer, No. The Vision electronics have 2 batteries, 1 for controller 1 (C1) and 1 for controller 2 (C2). C1 is the master. If C1 has a battery failure, C2 is promoted to master. If C2 battery is too low to drive the solenoid, it draws power from both batteries.
Basically, the only way to have both batteries powering the unit at once is if both batteries are low voltage, which theoretically should never happen.
JD

Tino de Rijk · 21st May 2007, 13:59

If you bother to go to the Library-part of this website, you'll find a very extensive article on how the Vision deals with its batteries, its power management, failure modes, behaviour with bad batteries etc., and in which (rare) situations the unit draws on both batteries. It is called "a closer look at Vision", written by me.
That should answer all your questions. No need to repeat the answers here again.... But the very short conclusion is: JD is right.

Ciao,

Tino.

Quote: (Originally Posted by JD White)

Well, Interesting post.
Short answer, No. The Vision electronics have 2 batteries, 1 for controller 1 (C1) and 1 for controller 2 (C2). C1 is the master. If C1 has a battery failure, C2 is promoted to master. If C2 battery is too low to drive the solenoid, it draws power from both batteries.
Basically, the only way to have both batteries powering the unit at once is if both batteries are low voltage, which theoretically should never happen.
JD

HammerHeadShark · 21st May 2007, 14:25

Quote: (Originally Posted by JD White)

Well, Interesting post.
Short answer, No. The Vision electronics have 2 batteries, 1 for controller 1 (C1) and 1 for controller 2 (C2). C1 is the master. If C1 has a battery failure, C2 is promoted to master. If C2 battery is too low to drive the solenoid, it draws power from both batteries.
Basically, the only way to have both batteries powering the unit at once is if both batteries are low voltage, which theoretically should never happen.
JD

Thank you for the answer. But let's go through:

The logic associated to controllers is clear.
You are confirming that the circuits are communicant and therefore a short circuit happened on C1 could someway consume also battery 2.

Example: C1 is master and draws power from battery 1. At a certain moment C1 encounter a closed circuit and burns the battery 1. C2 becomes the master but what prevents the "short circuit" on C1 to draw energy from battery 2? Is there a switch that isolates physically the two electronics?

regards

enzo

HammerHeadShark · 21st May 2007, 14:59

Quote: (Originally Posted by Tino de Rijk)

If you bother to go to the Library-part of this website, you'll find a very extensive article on how the Vision deals with its batteries, its power management, failure modes, behaviour with bad batteries etc., and in which (rare) situations the unit draws on both batteries. It is called "a closer look at Vision", written by me.
That should answer all your questions. No need to repeat the answers here again.... But the very short conclusion is: JD is right.

Ciao,

Tino.

Tino, I just read your article in the library. But I'm sorry, I'm still not convinced that a short circuit could not affect both batteries.

Let me ask a last question: if it is the solenoid actuator to short circuiting. What prevents the two batteries and related electronics to drop down?

Thank you

enzo

21st May 2007, 10:05	#1 (permalink)
HammerHeadShark New Member Current Rebreather/s: Azimuth Other Rebreather/s: Azimuth Join Date: Jun 2006 Location: Rome Posts: 4	Visio Electronics Failure Hi everybody, yesterday I was discussing with a friend about the new vision electronics. He recently esperienced a bad problem: during the pre_dive check the pendant/monitor has shut down and he was not able to move to dive mode any more. The vendor has declared that this problem is identified ad cannot happen during the dive. (the electronic is now in APD since two weeks) Starting from this point I discovered (I'm Meg Diver) that the Vision batteries are used one x time and each battery can feed both electronics. (in the Meg each battery can feed only its own electronic) So, my question is: if one electronic would increase the energy absorption (due to a short circuit or a general failure of any component) both batteries are going to fail? In this case are both electronics going to shut down together? Regards HHS
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21st May 2007, 12:46	#2 (permalink)
JD White New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Vision Join Date: Aug 2006 Location: Adelaide Posts: 44	Re: Visio Electronics Failure Quote: (Originally Posted by HammerHeadShark) Hi everybody, yesterday I was discussing with a friend about the new vision electronics. He recently esperienced a bad problem: during the pre_dive check the pendant/monitor has shut down and he was not able to move to dive mode any more. The vendor has declared that this problem is identified ad cannot happen during the dive. (the electronic is now in APD since two weeks) Starting from this point I discovered (I'm Meg Diver) that the Vision batteries are used one x time and each battery can feed both electronics. (in the Meg each battery can feed only its own electronic) So, my question is: if one electronic would increase the energy absorption (due to a short circuit or a general failure of any component) both batteries are going to fail? In this case are both electronics going to shut down together? Regards HHS Well, Interesting post. Short answer, No. The Vision electronics have 2 batteries, 1 for controller 1 (C1) and 1 for controller 2 (C2). C1 is the master. If C1 has a battery failure, C2 is promoted to master. If C2 battery is too low to drive the solenoid, it draws power from both batteries. Basically, the only way to have both batteries powering the unit at once is if both batteries are low voltage, which theoretically should never happen. JD __________________ Drilling holes is just boring.....
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21st May 2007, 13:59	#3 (permalink)
Tino de Rijk Old, maybe one day wise Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Evolution Join Date: Mar 2006 Location: Amsterdam Posts: 375	Re: Visio Electronics Failure If you bother to go to the Library-part of this website, you'll find a very extensive article on how the Vision deals with its batteries, its power management, failure modes, behaviour with bad batteries etc., and in which (rare) situations the unit draws on both batteries. It is called "a closer look at Vision", written by me. That should answer all your questions. No need to repeat the answers here again.... But the very short conclusion is: JD is right. Ciao, Tino. Quote: (Originally Posted by JD White) Well, Interesting post. Short answer, No. The Vision electronics have 2 batteries, 1 for controller 1 (C1) and 1 for controller 2 (C2). C1 is the master. If C1 has a battery failure, C2 is promoted to master. If C2 battery is too low to drive the solenoid, it draws power from both batteries. Basically, the only way to have both batteries powering the unit at once is if both batteries are low voltage, which theoretically should never happen. JD
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21st May 2007, 14:25	#4 (permalink)
HammerHeadShark New Member Current Rebreather/s: Azimuth Other Rebreather/s: Azimuth Join Date: Jun 2006 Location: Rome Posts: 4	Re: Visio Electronics Failure Quote: (Originally Posted by JD White) Well, Interesting post. Short answer, No. The Vision electronics have 2 batteries, 1 for controller 1 (C1) and 1 for controller 2 (C2). C1 is the master. If C1 has a battery failure, C2 is promoted to master. If C2 battery is too low to drive the solenoid, it draws power from both batteries. Basically, the only way to have both batteries powering the unit at once is if both batteries are low voltage, which theoretically should never happen. JD Thank you for the answer. But let's go through: The logic associated to controllers is clear. You are confirming that the circuits are communicant and therefore a short circuit happened on C1 could someway consume also battery 2. Example: C1 is master and draws power from battery 1. At a certain moment C1 encounter a closed circuit and burns the battery 1. C2 becomes the master but what prevents the "short circuit" on C1 to draw energy from battery 2? Is there a switch that isolates physically the two electronics? regards enzo
(Offline)

21st May 2007, 14:59	#5 (permalink)
HammerHeadShark New Member Current Rebreather/s: Azimuth Other Rebreather/s: Azimuth Join Date: Jun 2006 Location: Rome Posts: 4	Re: Visio Electronics Failure Quote: (Originally Posted by Tino de Rijk) If you bother to go to the Library-part of this website, you'll find a very extensive article on how the Vision deals with its batteries, its power management, failure modes, behaviour with bad batteries etc., and in which (rare) situations the unit draws on both batteries. It is called "a closer look at Vision", written by me. That should answer all your questions. No need to repeat the answers here again.... But the very short conclusion is: JD is right. Ciao, Tino. Tino, I just read your article in the library. But I'm sorry, I'm still not convinced that a short circuit could not affect both batteries. Let me ask a last question: if it is the solenoid actuator to short circuiting. What prevents the two batteries and related electronics to drop down? Thank you enzo
(Offline)

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