Author Topic: Siglent rust  (Read 8379 times)

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Offline dadler

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Siglent rust
« on: April 08, 2015, 10:45:42 pm »
Note: Do not want to start drama here, this is a serious question.

Ever since I watched Dave's tear down of the Siglent AWG that had copious rust on the internal surfaces of the enclosure, I have been put off by Siglent products in general.

I never found a follow-up to that issue, and in searching just saw some mention that "maybe the factory is by the sea".

Is there a follow-up that addressed this issue?

Was this just a one-time occurrence and Dave had bad luck, or have other people purchased units with internal enclosure rust?

I can't be the only one that was put off by the rust shown in the video. If this issue has been addressed entirely, it would be great to know that explicitly.
 

Online tautech

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Re: Siglent rust
« Reply #1 on: April 08, 2015, 11:20:33 pm »
AFAIK it was linked only to the SDG5000 series.
That might imply Siglent's supplier of chassis was at fault.  :-//
Or a bad batch of metal plating at that time.  :-//

No units that I have opened have had any rust.

I'd like to know if any other models were affected too.
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Offline rdl

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Re: Siglent rust
« Reply #2 on: April 09, 2015, 05:17:18 am »
It is kind of odd how little was ever heard about that. Does anyone know of an official response from Siglent? Just imagine the uproar there would have been if that had been something from Agilent, Fluke, Tektronix, etc.
 

Offline EEVblog

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Re: Siglent rust
« Reply #3 on: April 09, 2015, 05:26:18 am »
Note: Do not want to start drama here, this is a serious question.
Ever since I watched Dave's tear down of the Siglent AWG that had copious rust on the internal surfaces of the enclosure, I have been put off by Siglent products in general.
I never found a follow-up to that issue, and in searching just saw some mention that "maybe the factory is by the sea".
Is there a follow-up that addressed this issue?

They fixed it.
They offered me a unit to inspect to follow-up but this was at the same time as Siglent employees were caught creating dummy accounts on the forum, so I had no interest in it after that.
 

Offline pickle9000

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Re: Siglent rust
« Reply #4 on: April 09, 2015, 05:27:57 am »
I've got an older scope and newer arb with no issues (or rust). The scope has been though shipping hell, frozen solid, dried condensation with the cover off and fan multiple times. And it keeps on ticking.
 

Offline pickle9000

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Re: Siglent rust
« Reply #5 on: April 09, 2015, 05:30:17 am »
Note: Do not want to start drama here, this is a serious question.
Ever since I watched Dave's tear down of the Siglent AWG that had copious rust on the internal surfaces of the enclosure, I have been put off by Siglent products in general.
I never found a follow-up to that issue, and in searching just saw some mention that "maybe the factory is by the sea".
Is there a follow-up that addressed this issue?

They fixed it.
They offered me a unit to inspect to follow-up but this was at the same time as Siglent employees were caught creating dummy accounts on the forum, so I had no interest in it after that.

Do you catch manufacturers doing that often?
 

Offline EEVblog

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Re: Siglent rust
« Reply #6 on: April 09, 2015, 05:40:54 am »
Do you catch manufacturers doing that often?

The only major manufacturer I can remember.
There was the Orso smart watch guy who did that, got busted, and lied through his teeth that it wasn't him.
Siglent to their credit apologised and said it wasn't deliberate, just several employees being over-keen, and they are still here on the forum with an official account.
 

Offline atferrari

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Re: Siglent rust
« Reply #7 on: April 09, 2015, 09:33:31 am »
Do you catch manufacturers doing that often?

The only major manufacturer I can remember.
There was the Orso smart watch guy who did that, got busted, and lied through his teeth that it wasn't him.
Siglent to their credit apologised and said it wasn't deliberate, just several employees being over-keen, and they are still here on the forum with an official account.

Sorry for the probably stupid question: how do you catch" them? Isn't the same I could do registering in any forum, or this for the case? I wonder if it is nationality or something similar. n :-//

Definitely many things I ignore.
Agustín Tomás
In theory, there is no difference between theory and practice. In practice, however, there is.
 

Offline Siglent

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Re: Siglent rust
« Reply #8 on: April 09, 2015, 10:16:08 am »
Our products do not have rust problem now.
Dear Dave, I hope you won't ban my account Siglent cause I want to communicate with customers and hear their voice.
The Best Value in Electronic Test & Measurement
 

Offline EEVblog

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Re: Siglent rust
« Reply #9 on: April 09, 2015, 11:09:13 am »
Sorry for the probably stupid question: how do you catch" them? Isn't the same I could do registering in any forum, or this for the case? I wonder if it is nationality or something similar. n :-//

The forum software has quite advanced features for logging and tracking stuff like this. Everyone's logins, visits and posts are all automatically tracked and the software can cross match IP addresses and ranges and hostnames against all other accounts. Date and times too. In the case of the Orsto guy it was simple to track that he was using a different machine or IP spoofer minutes apart as he logged in and posted under different accounts.
Even without that tracking, people picked up the unusual nature of the posts wording and put two and two together. Generally people aren't clever enough to pull off two accounts and get away with it, they slip up, and the human mind is great at subconscious pattern matching.
 

Offline EEVblog

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Re: Siglent rust
« Reply #10 on: April 09, 2015, 11:10:25 am »
Dear Dave, I hope you won't ban my account Siglent cause I want to communicate with customers and hear their voice.

Not at all, you are more than welcome here. That issue we had was long ago and forgiven.
 

Offline SimonD

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Re: Siglent rust
« Reply #11 on: April 09, 2015, 11:33:00 am »
I wish, someone from RIGOL to do something like that!
Maybe Dave have the connections to ask that from someone in Rigol.  ;)
Anyway keep the great job (and support  :-+) Jade from Siglent!
 

Offline SimonD

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Re: Siglent rust
« Reply #12 on: April 09, 2015, 11:40:22 am »
btw Dave, can you make for us one of your great review for the SDM 3055 multimeter from Siglent?
I think lot of people interested about that in this forum!
3 months ago Shahriar (Hugoneus) has promissed one review but ...
 

Offline Dave92F1

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Re: Siglent rust
« Reply #13 on: April 09, 2015, 05:16:53 pm »
btw Dave, can you make for us one of your great review for the SDM 3055 multimeter from Siglent?
I think lot of people interested about that in this forum!
3 months ago Shahriar (Hugoneus) has promissed one review but ...

I'll second that request. It would be great to see it compared to the almost-identically-priced Rigol DM3058E. (And even the Vici, if Dave is feeling really ambitious. But I'm sure both Rigol and Siglent blow the Vici away - as they should for the price.)

But the Rigol is getting pretty old - maybe Dave is waiting for the replacement model to come out? (Don't know if they tell him anything in advance...)
 

Offline dadler

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Re: Siglent rust
« Reply #14 on: April 09, 2015, 05:37:35 pm »
btw Dave, can you make for us one of your great review for the SDM 3055 multimeter from Siglent?
I think lot of people interested about that in this forum!
3 months ago Shahriar (Hugoneus) has promissed one review but ...

I'll second that request. It would be great to see it compared to the almost-identically-priced Rigol DM3058E. (And even the Vici, if Dave is feeling really ambitious. But I'm sure both Rigol and Siglent blow the Vici away - as they should for the price.)

But the Rigol is getting pretty old - maybe Dave is waiting for the replacement model to come out? (Don't know if they tell him anything in advance...)

I asked him to do a review of the Rigol and he mentioned that he didn't think it would be a useful review, as Shahriar had already done a good review. The Rigol in particular is quite old at this point, unless we want to consider it a "vintage teardown"  :P.
 

Offline echen1024

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Re: Siglent rust
« Reply #15 on: April 12, 2015, 05:33:22 pm »
I purchased a SDS1102CNL ~2 years ago. It also had the rust issue. They offered to replace it, but I declined due to needing to send it back and waiting for the new one to arrive, and needing to pay shipping. Although if their manufacturing really is in Shenzhen as I believe it to be, then it is right by the sea and very humid.
I'm not saying we should kill all stupid people. I'm just saying that we should remove all product safety labels and let natural selection do its work.

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Online tautech

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Re: Siglent rust
« Reply #16 on: July 22, 2015, 09:20:16 am »
Prompted by a recent thread I've asked Siglent to consider addressing any perceived rust issue for future production.

Dear Siglent
There are EEVblog members that are concerned with the minor rust on some Siglent products chassis/frames.
These are of recent manufacture.

https://www.eevblog.com/forum/testgear/siglent-sdm3055a-5-5-digit-multimeter-review-teardown-experiments/msg714446/#msg714446
See posted images.

Earlier but recent thread:
https://www.eevblog.com/forum/testgear/siglent-rust/

You will see further on in the first thread I have explained the rust is minor and will no effect on the life of the product.
I could discuss the rust more with the forum but I feel this will achieve little.

I know many do not properly understand the rusting process on coated steel ( Galvanic Protection ) but I do not think it will productive to continue the discussion.
My reasons: http://www.astm.org/SNEWS/APRIL_2006/dallynside_apr06.html

Quote
In practice, this means that zinc-bearing coatings will not be undercut by rusting steel because the steel adjacent to the coating cannot corrode. Any exposure of the underlying steel, due to severe coating damage or a cut edge, will not result in corrosion of the steel until the adjacent metallic-coating has been consumed. Unless relatively large areas of steel are exposed there is minimal effect on the overall service life of the coating.

Despite this knowledge I ask that Siglent require better rust protection or rust preventative coatings be added to equipment chassis to prevent rust from forming on the chassis edges or the punched holes.

Kind Regards
tautech
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