Author Topic: List your test equipment "scores" here!  (Read 492847 times)

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Offline lmester

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Re: List your test equipment "scores" here!
« Reply #1125 on: January 17, 2017, 04:54:18 pm »
Also the documentation that I've read says it's needed to perform a firmware update.  Once I get my meter I'm going to check the firmware version. If it's not current and if there are any important bug fixes I may buy a cal key to allow the firmware update.

Hmmm, I'm looking for the firmware but can't find it. If you go to their site here -

GDM 8251A

You can find software for the 8251A (the unit is obsolete now), and you can find the firmware updater program, but there is no firmware at all. I even unpacked the firmware updater and installed it, but it doesn't include the .hex firmware file (no, the Download button in the program doesn't download it from the internet, it downloads the current version from the meter). I also searched a few other sites to no avail.

We'll have to find it!  :-//

 :( I had already downloaded the updater program. I assumed the firmware was wit it. I just installed my copy. I don't see any firmware files. Definitely need to do some internet searching tonight.  Someone must have firmware for this meter. Or know if it's even needed. There may be no important bug fixes.

 

Online xrunner

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Re: List your test equipment "scores" here!
« Reply #1126 on: January 17, 2017, 11:21:06 pm »
Well here it is - nice bright display, seems to be in good condition. The white faceplate on the right side is a little yellowed, typical of of something that has been close to a window, but I can easily fix it with some peroxide the next time the sun is shining.  :clap:

Edit: Firmware is v2.2
« Last Edit: January 18, 2017, 12:01:40 am by xrunner »
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Offline alank2

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Re: List your test equipment "scores" here!
« Reply #1127 on: January 18, 2017, 12:48:41 am »
The latest firmware according to the mfgr is v2.30.
 
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Online xrunner

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Re: List your test equipment "scores" here!
« Reply #1128 on: January 18, 2017, 01:03:35 am »
The latest firmware according to the mfgr is v2.30.

Roger that, I sent tech support an email asking for the latest firmware file - so far no response.  :popcorn:
I am a Test Equipment Addict (TEA) - by virtue of this forum signature, I have now faced my addiction
 

Offline bitseeker

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Re: List your test equipment "scores" here!
« Reply #1129 on: January 18, 2017, 03:24:22 am »
Well here it is - nice bright display, seems to be in good condition. The white faceplate on the right side is a little yellowed, typical of of something that has been close to a window, but I can easily fix it with some peroxide the next time the sun is shining.  :clap:

Quite nice, indeed. Looks so much like an HP 34401A. Tempting, very tempting. But I shall resist! ;D
I TEA.
 
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Online xrunner

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Re: List your test equipment "scores" here!
« Reply #1130 on: January 18, 2017, 04:15:48 am »
Quite nice, indeed. Looks so much like an HP 34401A. Tempting, very tempting. But I shall resist! ;D

You can resist ... I cannot, at least yet. I have seen your thread here -

Test Equipment Anonymous group therapy

I'm trying to gain the strength to post there. I know I need help - the doctors here ... they don't understand. I don't think they are taught about test equipment addiction in school. They have no idea of how to help me.  :palm:

Let me think about it tonight. I may try and post tomorrow. I'm afraid if I admit my problem people will laugh, but if this group has the same addiction ...  :-\

I am a Test Equipment Addict (TEA) - by virtue of this forum signature, I have now faced my addiction
 

Offline bitseeker

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Re: List your test equipment "scores" here!
« Reply #1131 on: January 18, 2017, 04:57:48 am »
You can resist ... I cannot, at least yet. I have seen your thread here -

You don't need to. You already bought one. :-DD And a nice meter it is, too.

Quote
I'm trying to gain the strength to post there. I know I need help - the doctors here ... they don't understand. I don't think they are taught about test equipment addiction in school. They have no idea of how to help me.  :palm:

Let me think about it tonight. I may try and post tomorrow. I'm afraid if I admit my problem people will laugh, but if this group has the same addiction ...  :-\

The TEA thread is quite lively and friendly. And when we laugh, we all laugh together. :-+
I TEA.
 

Online Cubdriver

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Re: List your test equipment "scores" here!
« Reply #1132 on: January 18, 2017, 06:22:08 am »
You can resist ... I cannot, at least yet. I have seen your thread here -

You don't need to. You already bought one. :-DD And a nice meter it is, too.

Quote
I'm trying to gain the strength to post there. I know I need help - the doctors here ... they don't understand. I don't think they are taught about test equipment addiction in school. They have no idea of how to help me.  :palm:

Let me think about it tonight. I may try and post tomorrow. I'm afraid if I admit my problem people will laugh, but if this group has the same addiction ...  :-\

The TEA thread is quite lively and friendly. And when we laugh, we all laugh together. :-+

...and when someone tries to get on the wagon, we grab them by the shirttails and pull them back off!   :-DD   :-+ :-DMM :-DMM

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline boffin

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Re: List your test equipment "scores" here!
« Reply #1133 on: January 18, 2017, 07:21:06 am »
A Simpson 360, which cosmetically looks bad at first glance, but is just dirty. The battery compartment has probably never had batteries in it, and it powers up (but doesn't measure properly).


Oh, the price; it was on the "by donation" table, and $10 took it.  Last swap meet I got a dead [now fixed] Philips scope for $10, and now this for $10.  Less than the can of deoxit I'll need to clean the contacts

« Last Edit: January 18, 2017, 07:23:28 am by boffin »
 

Online TheSteve

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Re: List your test equipment "scores" here!
« Reply #1134 on: January 18, 2017, 07:24:57 am »
A Simpson 360, which cosmetically looks bad at first glance, but is just dirty. The battery compartment has probably never had batteries in it, and it powers up (but doesn't measure properly).


Oh, the price; it was on the "by donation" table, and $10 took it.  Last swap meet I got a dead [now fixed] Philips scope for $10, and now this for $10.  Less than the can of deoxit I'll need to clean the contacts

I was wondering how the swap went, I didn't make it out.
VE7FM
 

Offline TerraHertz

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Re: List your test equipment "scores" here!
« Reply #1135 on: January 25, 2017, 02:50:10 pm »
Not really *electronic test* gear as such, but I'm quite happy about this week's score.
For a long time I've been searching for a turbomolecular pump, for a project involving a vacuum chamber. No luck at all. And worse, even one instance of extremely frustrating near-score, killed by a guy in the US who was willing to sell me some nice ones, but then decided they must be prohibited exports (because he severely misunderstood the pumping specs for vacuum pumps and was impervious to education. Did not understand the difference between Liters/hr at ten to the minus 5 Torr, vs same AT ATMOSPHERE.)

Anyway, I've gone from zero to four turbo pumps. Plus a pile of vacuum plumbing, gauging and other stuff that will be a big help.

And for icing on top, something I never dreamed I'd own - a Residual Gas Analyzer. Pretty much complete and fingers crossed, it might actually be restorable to full function. (It's a low pressure gas mass spectrometer, for those who've never heard of an RGA.)

For extra karmic laughs, one of the turbos is the exact same model as the ones the guy in the USA insisted were so special they couldn't be exported. Hmm... the forum seems to be missing a 'blows raspberry' emoticon.

Pic is just three of the turbo pumps. The rest of it is still in boxes.

The price was - drive Sydney to Melbourne in one day, a day in Melbourne with friend, in one day drive back to Sydney with friend (me still doing all the driving due to car insurance fine print), swap cars at my place, drive up to Blackheath in the mountains so we could both go to another friend's party (in a cave in the bush), then at 1am leave there and drive to Kanangra via Jenolan, me set up two tents at 4am (he's never camped before), next day take him for a walk around the sights at Kanangra Walls (some I bet no other forum Sydney-ites have ever seen, since, ahem, my grandfather created the Blue Mountains Nat. Park), then drive back to Sydney that night. And before he flew back to Melb, give him a tour of a cool Sydney urbex sight called Fortress. It's underground, but I can't say where.
Collecting old scopes, logic analyzers, and unfinished projects. http://everist.org
 

Online PA0PBZ

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Re: List your test equipment "scores" here!
« Reply #1136 on: January 25, 2017, 03:26:29 pm »
Pic is just three of the turbo pumps. The rest of it is still in boxes.

Interesting to see they are already wearing their tin foil hats.

*hides*
Keyboard error: Press F1 to continue.
 

Offline JonM

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Re: List your test equipment "scores" here!
« Reply #1137 on: January 25, 2017, 03:27:39 pm »
I'm a cryopump guy, but turbopumps make a lot more sense for home use.

Nice collection!

Jon
 

Offline TerraHertz

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Re: List your test equipment "scores" here!
« Reply #1138 on: January 25, 2017, 11:01:13 pm »
I'm a cryopump guy, but turbopumps make a lot more sense for home use.

Also a lot more sense than oil diffusion pumps, which were the alternative since I have a few. But I really don't like them. I hate cleaning oil-fouled things.

Quote
Nice collection!

One nice thing, is one of the turbo pumps has no controller. So I have an excuse to take it apart. Wheee!
Will have a brief search for a controller on ebay, fingers half-crossed I don't find one.

Currently working through refurbishment of the mass spectrometer. The dicey part was getting the old PII/Win98SE PC going, that has all the application software on its HDD. When I first tried the drive in an external dock it spun and sounded like it initialized OK, but totally failed to be recognized as any kind of drive. Depressing, since without the software there'd be no chance. And chances of getting the software through other channels are low to zero.

But then when looking at the PC motherboard, the BIOS flash chip has an odd sticker that says only "MAVERICK".
Hmm.... a custom BIOS? Thinks: Maybe to allow boot from a HDD made non-standard, as part of a software protection scheme?

And lo and behold, after dealing with other machine problems like a failed DRAM DIMM, and faded electros in the power supply, the 'no response' drive boots, and is working fine, everything there.
Still looking for a drive partition image backup util that works in both Win98SE, and my other PC's WinXP & Win7.

The whole machine had been out in the weather (semi-covered) for a long time, but is surprisingly undamaged. Probably I'll do a thread in Repair on it.

Pics: the mass-spec quadrupole sensor driver module (been in the rain), and the system interface card from the PC.
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Offline JonM

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Re: List your test equipment "scores" here!
« Reply #1139 on: January 26, 2017, 07:24:02 am »
Yes, diffusion pumps are horrible anywhere but especially at home.  I last used them around 1980 when Varian was the big brand.

What brand is the RGA you have?

I once wanted a home ultrahigh-vacuum system but would only do it now if a really great deal appeared and I had room for it. I'm sure that my wife would not be excited...

 

Offline TerraHertz

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Re: List your test equipment "scores" here!
« Reply #1140 on: January 26, 2017, 11:49:50 am »
What brand is the RGA you have?

Anglo Scientific Instruments
  DCQ2000 Mass Spectrometer
  Quadrupole control head:  Model: DCQ300RF
  Turbo vacuum pump on this:   Varian TV-301 Navigator   Model 9698919  Made 2007
Collecting old scopes, logic analyzers, and unfinished projects. http://everist.org
 

Offline cheeseit

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Re: List your test equipment "scores" here!
« Reply #1141 on: January 26, 2017, 01:12:04 pm »
NI GPIB-232CT-A including 1.5m cable but without power supply for €53. Seller also kindly included a FTDI DB9-USB module.

Weston cell for €20. Mostly as a display item but it's spot on.
« Last Edit: January 26, 2017, 01:47:46 pm by cheeseit »
 

Offline HighVoltage

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Re: List your test equipment "scores" here!
« Reply #1142 on: January 26, 2017, 01:21:30 pm »
Weston cell for €20. Mostly as a display item but it's spot on.
Nice looking Weston Cell.
Can you open it up and show us the inside?
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Offline cheeseit

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Re: List your test equipment "scores" here!
« Reply #1143 on: January 26, 2017, 01:47:20 pm »
Absolutely. Any idea how old it is?
 
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Offline Jester

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Re: List your test equipment "scores" here!
« Reply #1144 on: January 26, 2017, 05:48:31 pm »
Weston cell for €20. Mostly as a display item but it's spot on.

How long do these hold a charge, and how are they charged?
 

Offline HighVoltage

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Re: List your test equipment "scores" here!
« Reply #1145 on: January 26, 2017, 06:05:43 pm »
Absolutely. Any idea how old it is?
Thanks for the picture
Yours looks much older than mine and I have one from 1971

We have a really nice eevblog discussion about Weston Cells, started by Dr.Frank:
https://www.eevblog.com/forum/metrology/1000-my-(hi)story-of-the-weston-cell-of-the-volt-and-of-being-a-volt-nuts/
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Offline cheeseit

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Re: List your test equipment "scores" here!
« Reply #1146 on: January 26, 2017, 09:10:11 pm »
We have a really nice eevblog discussion about Weston Cells, started by Dr.Frank:
https://www.eevblog.com/forum/metrology/1000-my-(hi)story-of-the-weston-cell-of-the-volt-and-of-being-a-volt-nuts/

Great thread, thank you! I did search on the forum before purchasing it but didn't find that thread. Dr. Frank rocks!

How long do these hold a charge, and how are they charged?

I'm no expert but it is stable for potentially several decades, if used and stored correctly. Mine looks quite old and is still spot on at 1.0186V @~20-21°C which is the limit of my equipment ±(0.05%+5 dig.). You don't charge it and you don't load it.
 

Offline HighVoltage

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Re: List your test equipment "scores" here!
« Reply #1147 on: January 26, 2017, 09:18:32 pm »
I'm no expert but it is stable for potentially several decades, if used and stored correctly. Mine looks quite old and is still spot on at 1.0186V @~20-21°C which is the limit of my equipment ±(0.05%+5 dig.). You don't charge it and you don't load it.
Make sure to put your meter in high Z mode ( > 10 GOHM ) before you measure the Weston Cell
Otherwise the load from the DMM is to high already.
Best to use a second source and a Null-Detector which reduces the load on the cell to zero


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Offline kcbrown

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Re: List your test equipment "scores" here!
« Reply #1148 on: January 27, 2017, 12:51:35 am »
I'd say, "Welcome to TEA (Test Equipment Anonymous)." So glad you could join us. :-DMM

Thanks - the first step is to admit I have a probelm, I realize that now.  :palm:

If anyone wants some of the drug I got - here is the seller of the drug meter - they have more ... just look for the shady guy on the corner with the black trenchcoat.

http://www.ebay.com/itm/GW-Instek-120-000-Counts-Dual-Display-Multimeter-GDM-8251A/291980567514

Thanks a lot!  Now I have (or will have, once this arrives) 8 multimeters, and my wife has thrown me into the dog house outside, and I have to eat from the doggie bowl.   And the worst part is that the dog house isn't wired for power.   This is all your fault.    >:(

 :D
 

Offline bitseeker

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Re: List your test equipment "scores" here!
« Reply #1149 on: January 27, 2017, 01:02:28 am »
Thanks a lot!  Now I have (or will have, once this arrives) 8 multimeters, and my wife has thrown me into the dog house outside, and I have to eat from the doggie bowl.   And the worst part is that the dog house isn't wired for power.

Ah, so now you need to buy some batteries, solar panels and charge controllers. You always wanted to get into solar power electronics, right? :-DD
I TEA.
 


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