weston standard cell model 3
ID: 102493
weston standard cell model 3
14.Mar.06 18:43
0
Bonjour!J'ai eu un nouveau module de weston standard cell.Le model est 3.Il y a une lampe à l'arrière qui produit 1.0195 volt.J'ai peu d'information a propos de cette appareil.Quelqu'un aurait-il des information?Ça ressemble à cela.
merci!
alexandre Lavoie Girard
merci!
alexandre Lavoie Girard
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weston standard cell
24.Apr.06 22:24
Bonjour Alexandre
J'ai trouvé un article qui peut t'interesser:
"Standard Cells for E.M.F. Determinations. - In calibrations with the potentiometer it is necessary to have a "normal" or "standard" cell of known and constant e.m.f. The two cells used universally for this purpose are the cells devised by Latimer Clark and by Edward Weston. A form of the Clark cell is shown in Fig. 339. The positive pole is mercury (Hg), in contact with a paste of mercurous sulphate (Hg2SO4), and the negative pole is zinc in contact with a solution zinc sulphate. When this cell is made strictly according to the specifications fixed by the national physical laboratories, it has an e.m.f. of 1.434 volts at 15°C. and for a temperature t , an e.m.f. of [1.434 - 0.0012 (t - 15)] volts.
The Weston cell is exactly like the Clark cell except that the zinc is replaced by cadmium, and the zinc sulphate by cadmium sulphate. Its e.m.f. in the standard form is 1.0190 volts, and it has the great advantage of having practically no change of e.m.f., with temperatures. No appreciable current should be taken from a standard cell, as the accompanying chemical actions cause more or less permanent changes in the cell and its e.m.f. "
Voici le lien du site:
"Weston standard cell 3 model"
J'espère que cela t'aide un peut!
Rudy Vande Loo
J'ai trouvé un article qui peut t'interesser:
"Standard Cells for E.M.F. Determinations. - In calibrations with the potentiometer it is necessary to have a "normal" or "standard" cell of known and constant e.m.f. The two cells used universally for this purpose are the cells devised by Latimer Clark and by Edward Weston. A form of the Clark cell is shown in Fig. 339. The positive pole is mercury (Hg), in contact with a paste of mercurous sulphate (Hg2SO4), and the negative pole is zinc in contact with a solution zinc sulphate. When this cell is made strictly according to the specifications fixed by the national physical laboratories, it has an e.m.f. of 1.434 volts at 15°C. and for a temperature t , an e.m.f. of [1.434 - 0.0012 (t - 15)] volts.
Voici le lien du site:
"Weston standard cell 3 model"
J'espère que cela t'aide un peut!
Rudy Vande Loo
Remerciez l'auteur car vous trouvez que ce message est utile ou bien construit.
weston std cell
26.Apr.06 02:05
Merci Rudy!!Ça m'aide beaucoup.J'ai trouver un autre article sur internet entre temps.Merci!
Best regard,Alexandre Lavoie Girard
Best regard,Alexandre Lavoie Girard
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model-information
16.Jun.06 08:52
more information about this model:
physics.kenyon.edu/EarlyApparatus/index.html
The same model in RM
physics.kenyon.edu/EarlyApparatus/index.html
The same model in RM
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Picture type 1 or 2
06.Jul.06 23:04
Dear Alexandre
It is nice that you enter models and pictures and very well done for your very young age!
Something you might have not seen:
By uploading a picture you should really care if it is one of yours (your collection or ex collection) or somebody elses. I just saw that "your" photo is from the model in the Greenslade Collection. Please go to your profile by clicking your name and click there "Picture administration". for each picture loaded up you can change the legend. Please give the source if it is not yours and change to type 2 (other's picture). Thank you.
we might get difficulties if we don't observe the copyright. Please tell me when you have changed your pictures to the right picture type and made the courtesys remark.
It is nice that you enter models and pictures and very well done for your very young age!
Something you might have not seen:
By uploading a picture you should really care if it is one of yours (your collection or ex collection) or somebody elses. I just saw that "your" photo is from the model in the Greenslade Collection. Please go to your profile by clicking your name and click there "Picture administration". for each picture loaded up you can change the legend. Please give the source if it is not yours and change to type 2 (other's picture). Thank you.
we might get difficulties if we don't observe the copyright. Please tell me when you have changed your pictures to the right picture type and made the courtesys remark.
Remerciez l'auteur car vous trouvez que ce message est utile ou bien construit.