As promised, here are some pictures of my new Meratronik V540.
Meratronik is a company in Poland which produced such equipment.
They are still around, as per the look on their website:
http://www.meratronik.pl/The Meratronik V540 is a DMM which can measure only DC voltage up to 1000V.
My V540 was built around 1979.
The V541 can measure DC and AC. Here are some more detailed information
about the V541:
http://danyk.cz/meratronik_en.htmlThe V543 then can measure DC, AC and Ohms.
Here can be found some pictures:
http://multimetry.tzok.eu/multimetr.php?typ=V543Manuals, schematics etc. can be found here:
http://bee.mif.pg.gda.pl/Oktoda/index.php/Polskie_przyrz%C4%85dy_pomiaroweOne thing I really like at those meters is that they are using
this very nice and huge Nixie tubes made by RFT in the GDR.
The V540 contains one ZM567M which can display "+", "-" and "~".
The other five tubes are ZM566M which displays all the digits from 0 to 9.
The height of the digits is 30mm.
Technical details can be found here (sorry, it's in German):
http://www.tube-tester.com/sites/nixie/data/V600/Z566M/z566m.htmBut now the pictures:
This guy has to go to the bin:
Plugged the V540 to my variac to do some measurements:
Inputs shortened:
Four D-cells in series (sorry for the reflection):
5V applied from a DMM check from Mr. Malone, compared with a BM235 - 10V range:
5V in the 100V range:
5V in the 1000V range:
One D-cell, opened and filter removed with a ruler for comparison:
Nixie beauties lined up:
Top view, it's a bit dusty there:
Backside:
Inside the V540:
Recapping ahead (part of the PSU):
The top side of the suspicious caps:
The PSU module pcb and more suspicious looking caps:
PSU module removed:
Backside of the PSU module:
Module with a thermocoupled thingie:
Detailed view of this thermocoupler:
Backside of the thermocoupler pcb:
Next module (didn't checked what it is doing, perhaps it is the ADC):
From the left:
Mainboard top view, modules removed:
On the lower left, those guys are impulse transformers which are prone to fail.
Backside:
Nixies removed:
No, these guys aren't BD139 nor the three Lion Kings (BF457):
Nixie tubes, cleaned. The contacts are looking very nice, no sign of corrosion:
Some cableing porn:
I hope you've enjoyed this.
And, just as a side note: these meters are really really rare in the states.
If you should find one: get it immediatly!