gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
190318-0727 EDT
Looking for what was used as a standard for voltage I found this reference ---
http://histoires-de-sciences.over-blog.fr/2013/11/electrical-units-history.html
See "Units of electromotive force." about 1/4 into the discussion. Thus, by 1836 the Daneill Cell had been created. "This "impolarisable" cell had a constant f.e.m of 1,079 volt. The Daniell battery was a standard reference in France and Germany."
See https://en.wikipedia.org/wiki/Daniell_cell .
The Clark cell --- https://en.wikipedia.org/wiki/Clark_cell .
Also https://en.wikipedia.org/wiki/Weston_cell .
"The original design was a saturated cadmium cell producing a 1.018638 V reference and had the advantage of having a lower temperature coefficient than the previously used Clark cell.[1]One of the great advantages of the Weston normal cell is its small change of electromotive force with change of temperature. At any temperature t between 0 °C and 40 °C,Et/V = E20/V − 0.0000406 (t/°C − 20) − 0.00000095 (t/°C − 20)2 + 0.00000001 (t/°C − 20)3. This temperature formula was adopted by the London conference of 1908[2]" .
.
.
Looking for what was used as a standard for voltage I found this reference ---
http://histoires-de-sciences.over-blog.fr/2013/11/electrical-units-history.html
See "Units of electromotive force." about 1/4 into the discussion. Thus, by 1836 the Daneill Cell had been created. "This "impolarisable" cell had a constant f.e.m of 1,079 volt. The Daniell battery was a standard reference in France and Germany."
See https://en.wikipedia.org/wiki/Daniell_cell .
The Clark cell --- https://en.wikipedia.org/wiki/Clark_cell .
Also https://en.wikipedia.org/wiki/Weston_cell .
"The original design was a saturated cadmium cell producing a 1.018638 V reference and had the advantage of having a lower temperature coefficient than the previously used Clark cell.[1]One of the great advantages of the Weston normal cell is its small change of electromotive force with change of temperature. At any temperature t between 0 °C and 40 °C,Et/V = E20/V − 0.0000406 (t/°C − 20) − 0.00000095 (t/°C − 20)2 + 0.00000001 (t/°C − 20)3. This temperature formula was adopted by the London conference of 1908[2]" .
.
.