Show your Multimeter!

[schmitt trigger]

I recently visited Tokyo's Akihabara district.

There, I found this little analog gem. Brand new, and Made in Japan. As seen from the sales receipt, 4320 Yen.

I had a similar one almost 40 years ago, which I unfortunately lost.

[rsjsouza]

I recently visited Tokyo's Akihabara district.

There, I found this little analog gem. Brand new, and Made in Japan. As seen from the sales receipt, 4320 Yen.

I had a similar one almost 40 years ago, which I unfortunately lost.

Nice! The slightly older brother Sanwa YX-360TR was the backbone of meters in the 1980's in Brasil. Quite nice little meters.

[malagas_on_fire]

I remember to see some analog meters back in school, and i belive a sanwa was there,, an  YX-360TR .

Here are the multimeters + portable scope on it's brightness . .. : ( edit  sorry for my sloppy english and there are budgies in the video.. at least the sound of it. ) ,,
https://youtu.be/rLvXZXtlvrU

The most recent off all is the BM235 EEVeed followed by the uni-t 81b and the anengish

[Martin.M]

so. Fluke 8300A is on the restoration table, last nixie dont work (no large problem to me), and the power switch is fail.

in the bay was a nice Diff, it will go to me today. 

[larrybl]

Here is my old trusty.

[bsw_m]

Ex. USSR 6 1/2 multimeter V7-54/2
Base accuracy 0.0015% /year
REF based on zenner 5ppm/1000h class (2S108R).
ADC PWM type, like Solartron ADC.

Design year of this multimeter may be 1989. Production year of this unit- 1992.

[Gyro]

ADC PWM type, like Solartron ADC

There certainly seems to be a bit of a Solartron 7150 Plus 'vibe' going on there, display and all.

[bsw_m]

There certainly seems to be a bit of a Solartron 7150 Plus 'vibe' going on there, display and all.

Certain external similarity is present, but inside this metters is bit more different.
Teardown photos: https://yadi.sk/d/5-LrR75o3WAzsB
And schematic of analog part this metter: https://yadi.sk/d/3vCEklWu3Q9EBr

[Inverted18650]

Fluke 8502A. The last digit of my Fluke 335A is out and that is why we get a six on the end. Otherwise, impressively spot on, and right out of the box from seller "potomacestore" on eBay, just $126 USD delivered! (Not a paid endorsement, but giving them due credit.)

[bsw_m]

Yet another interesting stuff of USSR Metrology: V1-18/1
This is 7 1/2 DC differential voltmeter and DC calibrator with base accuracy 0.001%

Heart of this Voltmeter-calibrator is REF based on two 5ppm/1kHr zenners (2S108R) and PWM multiphase (12 phase) DAC.

Teardown photos of this voltmeter-calibrator here: https://yadi.sk/d/IBVTJWrx3PbyWC

On the first photo this unit on the top "on servicing". Bottom unit is 6 1/2 multimeter V7-39
On second photo this unit acts as calibrator.

[Neomys Sapiens]

@bsw_m: indeed interesting. Those are some new instruments here. Especially the latter shows that they did try hard over there too, What is the design date of those?

[bsw_m]

@bsw_m: indeed interesting. Those are some new instruments here. Especially the latter shows that they did try hard over there too, What is the design date of those?

May be a'm wrong but I think, that V1-18 has designed in early 198X.
V7-39 as far as I know has designed in 1981.


On the photo close-up of V7-39 which measures ultra precision 10kOhm resistor. (sorry, now i can't show teardown photos of V7-39)

V7-39 is 6 1/2 0.01% accuracy
REF on this multimeter based on ovenized 5ppm/kHr zenner 2S190U (9.1V), ADC is multi-slope integrating type.
Last calibration for this unit is 1991 year and I might be lucky, but the check after the repair this unit showed that the instrument is in the class with a large margin and don't need any calibration.

[Neomys Sapiens]

Might you have a link to a brochure, datasheet, manual?

[bsw_m]

Might you have a link to a brochure, datasheet, manual?

Yes, technical description, schematic diagrams and other. But information in russian, and cannot online translate :-(

V1-18: https://drive.google.com/folderview?id=1Hl021oci4ZMKQRfx8J-Ea2VC9lMw8Pb7
V7-39: https://yadi.sk/d/0-hW1loTgkoOnA

[Neomys Sapiens]

A follow-up to the Metrawatt 2036, here at work checking a little electronic load unit:



I definitely like it so far, the frequency of use was only limited by the aquisition of a Tek THM560 soon thereafter. Now, the Tek has migrated to my day lab (place of work) and the 2036 will find itself busy more often.

[barijan]

Hi Neomys Sapiens.
Recently I've scored a nice Siemens Multizet A1000 analog multimeter and found this post of yours talking about it.
I'm wondering if, by chance, you have it's manuals, or if you could point me how or where to get a copy.

The meter seems to be working fine, it's spot-on at all ranges but ohms, that is little bit off when zeroing, forcing me to always readjust the E-zero when change from ohms to other functions and vice-versa.
Googgleing a bit I managed to find only it's schematics, that seems to be pages 42 and 43 of a more comprehensive manual. But there's no much information at the schematics about the function of every trimpot on it.

Any help would be very much appreciated.
Greetings from Brazil.
Ricardo.

[Neomys Sapiens]

Hi Neomys Sapiens.
Recently I've scored a nice Siemens Multizet A1000 analog multimeter and found this post of yours talking about it.
I'm wondering if, by chance, you have it's manuals, or if you could point me how or where to get a copy.

The meter seems to be working fine, it's spot-on at all ranges but ohms, that is little bit off when zeroing, forcing me to always readjust the E-zero when change from ohms to other functions and vice-versa.
Googgleing a bit I managed to find only it's schematics, that seems to be pages 42 and 43 of a more comprehensive manual. But there's no much information at the schematics about the function of every trimpot on it.

Any help would be very much appreciated.
Greetings from Brazil.
Ricardo.

Hi barijan, congrats on that aquisition. Must be a rare thing where you live.
I have the manual and will be able to help, but it is not easy. Because it is a small format (A6) paper manual which will need a lot of work to scan properly. also, I have to look which languages are included, in the worst case, it might be German only.

[0culus]

Well, it's not technically a multimeter I guess, as it does not do current measurements directly but I recently added an -hp- 3456A to my bench. Going fanless after my 3455A is great!

[Vgkid]

Well, it's not technically a multimeter I guess, as it does not do current measurements directly but I recently added an -hp- 3456A to my bench. Going fanless after my 3455A is great!

Nice, I love my 3456a

[0culus]

So far, it's working really great and I love it. Based on my examination, I think a prior owner already replaced the problematic power supply caps, which is a bonus. When it comes to benchtop meters that are approaching 'voltnut' territory, I think the 3456A is a fantastic value. Unless you specifically *need* a 3458A, this is a fraction of the cost of even a broken 3458A and much easier to work on.

[Bud]

If you have a GPIB setup, here is a link to my logging Excel application

https://www.eevblog.com/forum/metrology/data-logger-for-legacy-hp-instruments/

[andy3055]

My first meter was the Sanwa I bought from my first pay check after becoming an Electrical Engineering apprentice in 1975 straight after high school. Along with that I got the resistor color wheel to begin. Still have the receipt, manual, original box and probes and still works!

The second was a Micronta from Radio Shack. Bought in 1991. Still works and all docs are still in hand.

The third is the Aneng 8009 which I got last year. I find this to be too light to the point it gets dragged with the slightest movement of the probe wires! I wish it was heavier on the table.

Getting old is no fun!

[BravoV]

 

[barijan]

Nice collection! 
I have a 260 also and it still faithfully accurate even after decades of use. It's the 7PM series to be exact.
The only annoying thing about these 7 and 8 series is finding compatible probes, due to these inverted banana jacks. 

[0culus]

Nice collection! 
I have a 260 also and it still faithfully accurate even after decades of use. It's the 7PM series to be exact.
The only annoying thing about these 7 and 8 series is finding compatible probes, due to these inverted banana jacks. 

Try probemaster; they have probes that fit various Simpson models: https://probemaster.com/meter-to-test-lead/#SIMPSON

Next time I order from them, I'm considering seeing if I can get something that will fit my 260 so I don't have to wear out the original leads.