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:: J/B® DM4-3™ Evaluation Thread [FieldTest Thread] ::

 
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ServiceF1rst
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PostPosted: Wed Apr 30, 2008 9:16 am    Post subject: J/B® DM4-3™ Evaluation Thread [FieldTest Thread] Reply with quote



Technical Specification Sheets:




We will be FieldTesting the DM4-3™, the second generation four valve model version of the original DM-2™. I expected to be in possession of this instrument before now, but have been advised by J/B® that the initial release date has been pushed back to mid-May as a result of logistics, I am assured the delayed release date has nothing to do with the instrument, but with logistics. I know we already have a waiting list to evaluate the DM-4™ so I wanted to give everyone a heads up on it's status.

Unlike the DM-2™ that we are currently evaluating the DM4-3™ will be provided in case - primarily as a protective measure for shipping purposes. Additionally we will likely pull the original DM-2™ from the FieldTest rotation when we add the second generation model - so if you have not gotten your name on our testing member list yet for this instrument, I recommend you do so now - just reply to this thread if you would like to be added.

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Reeferman
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PostPosted: Wed Apr 30, 2008 11:01 am    Post subject: Reply with quote

Did they say if they could be used around emf? Such as mobile a/c or transport. Or are they the same as the first ones?
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ServiceF1rst
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PostPosted: Wed Apr 30, 2008 1:19 pm    Post subject: Reply with quote

They did not make any indication relevant to the EMF issue, nor did I ask them about it Reef. The technical specifications that accompany most of these digital sets - J/B and Digi-Cool included do not provide an abundance of information about the transducers/thermistors or processors used internally, I assume due to proprietary concerns, although Testo is more than forth coming with internal component specifications, I would like to see all of the DMG OEM's follow their lead. I am assuming and perhaps inaccurately there have been no changes made in this regards. Maybe GF can check with his source to see if they can offer any insight relevant to the transducer protection in the DM4-3.

I will also say in defense of the J/B model, they seem to have addressed the majority of the concerns that we had with the original DM-2 the only exception being the sensor connectors.
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gonefishing
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PostPosted: Wed Apr 30, 2008 6:59 pm    Post subject: Reply with quote

Reeferman wrote:
Did they say if they could be used around emf? Such as mobile a/c or transport. Or are they the same as the first ones?


From what I understand, units serial numbered prior to 1652 did have some transducer issues.
This was due to, what I understand, the transducer coming loose from it's base. That issue was resolved with the
addition of an epoxy sealed transducer. Don't take this to the bank yet, as I may be un-clear on what I was told.
I will be in further contact with the J/B engineers, and bring as much light to this issue as is possible.

I do know J/B is extremely interested in hearing about the weak points so design changes can be made as necessary.

They want to be as pro-active in these issues as is possible. I will provide any up-dated information I am able to receive.

GF
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Maineiac
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PostPosted: Wed Apr 30, 2008 7:00 pm    Post subject: Reply with quote

can't wait, got a line already waiting to test em
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gonefishing
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PostPosted: Wed Apr 30, 2008 7:05 pm    Post subject: Reply with quote

Maineiac wrote:
can't wait, got a line already waiting to test em


I think they will be well received. The addition of the protective Boot, and the completely new sensor clamp design
should make them a pretty solid instrument. Just gotta get used to the Zepplin. Wink

GF
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Glenn Harrison
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PostPosted: Wed Apr 30, 2008 7:11 pm    Post subject: Reply with quote

Thanks for the update SF1. Been wondering where these were now that we have had the weather break and A/C season has begun. Mr. Green
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ServiceF1rst
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PostPosted: Wed Apr 30, 2008 11:20 pm    Post subject: Reply with quote

gonefishing wrote:
Reeferman wrote:
Did they say if they could be used around emf? Such as mobile a/c or transport. Or are they the same as the first ones?


From what I understand, units serial numbered prior to 1652 did have some transducer issues.
This was due to, what I understand, the transducer coming loose from it's base. That issue was resolved with the
addition of an epoxy sealed transducer. Don't take this to the bank yet, as I may be un-clear on what I was told.
I will be in further contact with the J/B engineers, and bring as much light to this issue as is possible.

I do know J/B is extremely interested in hearing about the weak points so design changes can be made as necessary.

They want to be as pro-active in these issues as is possible. I will provide any up-dated information I am able to receive.

GF


Appreciate the update and assistance G, thank you.
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ServiceF1rst
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PostPosted: Wed Apr 30, 2008 11:47 pm    Post subject: Reply with quote

gonefishing wrote:
Maineiac wrote:
can't wait, got a line already waiting to test em


I think they will be well received. The addition of the protective Boot, and the completely new sensor clamp design
should make them a pretty solid instrument. Just gotta get used to the Zepplin. Wink

GF


I think they have definitely made what appears to be substantial improvements comparative to the original DM-2. I am looking forward to the evaluation returns.

As I've said before I personally liked the manifold on the original DM-2, but I think the Zeppelin is the flagship in J/B's manifold line. And as I've also said it is not so dissimilar from the Yellow Jacket Titan.

J/B Zeppelin Four Valve Manifold:

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ServiceF1rst
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PostPosted: Wed Apr 30, 2008 11:50 pm    Post subject: Reply with quote

Glenn Harrison wrote:
Thanks for the update SF1. Been wondering where these were now that we have had the weather break and A/C season has begun. Mr. Green


No problem Glenn, I pass it along as I get it.
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