[volt-nuts] Solartron / Schlumberger 7150, 7150 plus, 7151

[Jan Fredriksson]

Throwing in my 2C on 5-1/2 - 6-1/2 digit DMMs on a budget

I have had a few Solartron / Schlumberger 7150, 7150 plus, 7151, 5-1/2
6-1/2 digit DMMs

Pro:
- available at very good prices on the net (especially in the UK?). I think
I paid around £50 for them. Except one bought brand new 20+ years ago.
- stability has been very good.
- Fairly compact boxes
- usually have GPIB
- schematics are available on the web

The 7150 are 5.5 digit, while 7150 plus and 7151 are 6.5 digit.

Con:
- There is a bad mains component causing smoke / shorts with age. Smokes
and smells badly so it is easy to find :-) I do not remember details but
gave a 7150 away when it smoked. The guy who got it fixed it.
- 2A max DC current range
- 2kohm min resistance range.
- Terminals are banana jacks without binding posts

A 7151 attached under a shelf over the workbench is my daily DMM. It is
turned on 24/7....

JF