Vintage Teardown: RFT G-1004.501 (DMM)
Part Nr. 1 - The outsides!
Greetings!
Mayhaps stuff like this is kinda interesting for some folks. Its a simple one but i do like this old stuff and tech
![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/cheesy.gif)
This particular unit was sold on:
25. October 19903 1/2 CountsDC V ranges: 200 mV, 2 V, 20 V, 200 V (0,25% +2) // 1000 V (0,5% + 2)
DC A ranges: 200 mA, 2 mA, 20 mA, 200 mA, 1000 mA (0,5% +2) // 10 A (1% +2)
AC V ranges: same as DC (1% +4 for all ranges)
AC A ranges: same as DC (1,25% + 4 for all ranges)
Ohms: 200, 2k, 20k, 200k, 2000k, 20M (0,5% +3)
Diodetest: 0,1 mA / 0 - 1,999 V (max. out: 3,4 V) + Continuity
Batterylife: >1500 h
This meter seems to be working just fine, except for the black zones within the LCD. So far it seems to be within spec! So nothing to repair i guess
![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/cheesy.gif)
For the first post, i'll show some pictures from the outside, the battery compartment and the schematics. There will be more from the inside later this week.
![Vintage Teardown: RFT G-1004.501 (DMM) 2360363-0](https://www.eevblog.com/forum/index.php?action=dlattach;topic=438863.0;attach=2360365;image)
With the original box, documents in rus + ger language, schematics and a warranty card its quite a good catch!
![Vintage Teardown: RFT G-1004.501 (DMM) 2360367-1](https://www.eevblog.com/forum/index.php?action=dlattach;topic=438863.0;attach=2360369;image)
The display (9mm in heigh) has its problems. But its usable! I could remove the polarization filter
![Tongue :P](https://www.eevblog.com/forum/Smileys/default/tongue.gif)
But as some of you know, it wouldn't be usable from that point forward.
![Vintage Teardown: RFT G-1004.501 (DMM) 2360371-2](https://www.eevblog.com/forum/index.php?action=dlattach;topic=438863.0;attach=2360373;image)
The original schematics. In this case the RUS variant. The other one would be in german.
![Vintage Teardown: RFT G-1004.501 (DMM) 2360375-3](https://www.eevblog.com/forum/index.php?action=dlattach;topic=438863.0;attach=2360377;image)
The bottom side with some markings like "RFT veb mikroelektronik >karl marx< erfurt" (RFT = Rundfunk- und Fernmelde-Technik / veb = Volkseigener Betrieb [publicly owned enterprise) and yes, this meter needs 6 batteries! And no, your eyes don't deceive you ... i use miserable Vartas. I had these on hand. I'm sorry! Please put the stones back to the ground where they belong and don't use them as a throwing weapon!
![Cheesy :D](https://www.eevblog.com/forum/Smileys/default/cheesy.gif)