Electronics > Metrology

Electron Plus SPA100 Source Picoammeter / High Resistance Meter

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bsw_m:
Also, if we refer to the table of the maximum permissible errors for  performance verification procedure. We can see the checked point 20aA with a maximum permissible error of 39.4% or ±8aA. (screen in attach).


--- Quote from: fcb on December 01, 2021, 01:42:42 pm ---I'm assuming the V7-45 is a two box unit.  Any pix of the insides?? ;D

--- End quote ---
You right!
Some pics and video You can see in this topic: https://www.eevblog.com/forum/metrology/v7-45-electrometer-made-in-belarus-(welcome-in-attoamps-world)/
And if You have interest, little info about ultra low current and ultra high resistance standard, that able calibrate this electrometer: https://www.eevblog.com/forum/metrology/nk4-1-low-current-and-high-resistance-calibrator-(made-in-belarus)/

fcb:
bvi = does this connect to the head?
kop = control/computer?
vb1chod analog vb1y = analog output?



   

bsw_m:

--- Quote from: fcb on December 01, 2021, 01:52:09 pm ---bvi = does this connect to the head?

--- End quote ---
this connector for connect external measurement block (yes, head)

--- Quote from: fcb on December 01, 2021, 01:52:09 pm ---kop = control/computer?
--- End quote ---
- this is GPIB IEEE488.1

--- Quote from: fcb on December 01, 2021, 01:52:09 pm ---vb1chod analog vb1y = analog output?

--- End quote ---
Yes.

fcb:
Love those vintage eastern block instruments. Performance looks amazing - did they build an updated unit or did it fissile (pun intended) with the end of the cold war?

So do you have different heads for current and voltage?

Interesting lunch-time reading:
https://ampnuts-com.translate.goog/v7-45/?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=de&_x_tr_pto=nui

bsw_m:

--- Quote from: fcb on December 01, 2021, 02:07:12 pm ---Love those vintage eastern block instruments. Performance looks amazing - did they build an updated unit or did it fissile (pun intended) with the end of the cold war?

--- End quote ---
The updated device was called B7-57 / 2, produced after the collapse of the USSR. Its production was piece and the device was unobtanium.
I'm restore one. Found it in a very poor condition and unfortunately not complete. Some photos "as received" in attach.


--- Quote from: fcb on December 01, 2021, 02:07:12 pm ---So do you have different heads for current and voltage

--- End quote ---
No, one head can measure currents, voltages and charges.

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