Dwyer TIC Manuel d'utilisateur télécharger pdf (Page 78)

77

Appendix

Emissivity table (continue)

Material

Temperature（°C ）

Emissivity

approximation

Carbon piece

0.85

Isolation piece

0.91～0.94

Sheet metal

0.88～0.90

Glass pipe

0.90

Loop type

0.87

Porcelain enamel

products

0.90

Porcelain enamel

designs

0.83～0.95

Solid materials

0.80～0.93

Ceramics (vase type)

0.90

Film

0.90～0.93

Mica

0.94～0.95

Flume mica

0.90～0.93

Glass

0.91～0.92

Semiconductor

0.80～0.90

Transistor (plastics

sealed)

0.30～0.40

Transistor (metal)

Diode

0.89～0.90

Transmitting loop

Pulse transmission

0.91～0.92

Level chalkiness layer

0.88～0.93

Top loop

0.91～0.92

1 2 ... 73 74 75 76 77 78 79 80 81 82

Commentaires sur ces manuels

Pas de commentaire