Industrial Weston Reference Cell D-845-D
Muirhead & Co. Ltd.; Beckenham
- Pays
- Royaume Uni
- Fabricant / Marque
- Muirhead & Co. Ltd.; Beckenham
- Année
- 1962
- Catégorie
- Appareils de mesure et de dépannage (matériel de labo)
- Radiomuseum.org ID
- 346261
- Gammes d'ondes
- - sans
- Tension / type courant
- Batterie ou accumulateur
- Haut-parleur
- - - Pas de sortie basse fréquence
- Matière
- Boitier en bakélite
- De Radiomuseum.org
- Modèle: Industrial Weston Reference Cell D-845-D - Muirhead & Co. Ltd.; Beckenham
- Forme
- Formes diverses décrites en notes
- Dimensions (LHP)
- 36 x 87 x 26 mm / 1.4 x 3.4 x 1 inch
- Remarques
-
The Reference Cells are characterised by a negligible temperature coefficient, ensuring a constant EMF over a wide range of temperatures, and a negligible hysteresis effect, enabling the cell to rapidly reach stability after a change of temperature.
Connexions are made to the cell electrodes by means of flexible PVC-covered wires soldered to the platinum lead-out wires, the PVC sleeving being coloured red and black to denote polarity. The base of the cell limbs, including the soldered junctions, are plastic-coated to secure the leads against vibration.
The final test is made at 25°C for both EMF and internal resistance; the positive limb is then labeled with the serial number and the date of the test. According to customer requirements, each cell is provided with a certificate of test or tie-on tag giving the actual voltage on the final test at 25°C to an accuracy of 0·01 %.
D-345 REFERENCE CELL
Several versions of this cell are available, the complete range covering a variety of applications.
The basic cell, which is an unmounted type, is the D-845-C; external connexions are made by means of 9-inch flexible leads.
Two standard-mounted versions are available: the D-845-A and the D-845-D.
SPECIFICATION
The guaranteed accuracy of EMF on the Test Certificate is 0·01 % for all models; the temperature coefficient is less than ±5 µV over the range 10 °C to 40 °C.
Type Manufact. Tolerance EMF 20 °C. Volts Int. Resistance Ω
D-845-D 1.0191 - 1.0195 800 -1200
- Poids net
- 0.094 kg / 0 lb 3.3 oz (0.207 lb)
- Littérature
- - - Manufacturers Literature (Muirhead Reference Cells, Doc. 430, 1962)
- Auteur
- Modèle crée par Harald Giese. Voir les propositions de modification pour les contributeurs supplémentaires.
- D'autres Modèles
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Vous pourrez trouver sous ce lien 29 modèles d'appareils, 24 avec des images et 1 avec des schémas.
Tous les appareils de Muirhead & Co. Ltd.; Beckenham
Collections
Le modèle Industrial Weston Reference Cell fait partie des collections des membres suivants.