Bedienungsanleitung Trotec BP21 (Seite 4 von 10) (Englisch)

756403

Zoom out

Zoom in

Vorherige Seite

1/10

Nächste Seite

4 EN

pyrometer BP21

Information about the device

Device description

The pyrometer BP21 uses an infrared sensor to measure

surface temperatures without contact. An integrated dual laser

pointer can be switched on for the precise determination of the

measuring spot diameter.

In addition, you can set the degree of emission of the material to

be measured which will result in a more precise measurement

result.

The device further features an alarm function. When exceeding

or falling below the specified values, the device emits an

acoustic signal.

Moreover, the device can indicate either the highest or lowest

value of the measurement.

The display can be illuminated as needed. An automatic switch-

off function saves the battery when not in use.

Measuring principle

The device measures the temperature by means of an infrared

sensor. Important factors playing a role in the temperature

measurement are the measuring spot diameter and the degree

of emission.

Measuring spot

Observe the ratio of the distance(D) to the measuring spot

diameter(S). The larger the distance to the object, the larger the

measuring spot diameter and hence, the less precise the

measured result, for the device calculates an average

temperature from all the temperatures in the measuring spot.

Spot 12.5mm 100 mm

Distance 150 mm 1200 mm

D:S = 12:1 Laser

Infrared

Degree of emission

The degree of emission is used to describe the energy radiation

characteristics of a material.

Most organic materials have an emissivity of0.95. Metals or

shiny materials come with a much lower value.

A material's emissivity depends on various factors, e.g. on

• Material composition

• Surface condition

• Temperature

The emissivity can range between 0.1 and 1 (in theory).

The following rule of thumb can be assumed:

• When a material is rather dark and its surface texture matt,

it probably has a high emissivity.

• The brighter and smoother the surface of a material, the

lower will be its emissivity, presumably.

• The higher the degree of emission of the surface to be

measured, the better it is suited for non-contact

temperature measurement by use of a pyrometer or

thermal imaging camera, since falsifying temperature

reflections become negligible.

Nevertheless, entering a degree of emission as appropriate as

possible is indispensable for a precise measurement.

Material Degree of emission

Aluminium, roughened 0.1 to 0.3

Aluminium, alloy A3003,

oxidized

0.3

Aluminium, oxidized 0.2 to 0.4

Asbestos 0.92 to 0.95

Tarmac 0.92 to 0.95

Basalt 0.7

Concrete 0.92 to 0.95

Bitumen 0.98 to 1.00

Lead, oxidized 0.2 to 0.6

Lead, rough 0.4

Roofing felt 0.95

Ice 0.98

Iron (forged), blunt 0.9

Iron, oxidized 0.5 to 0.9

Iron, rusted 0.5 to 0.7

Enamel varnish, black 0.95

Earth 0.92 to 0.96

Paint (not alkaline) 0.90 to 0.95

Paint (non-metal) 0.95

Gypsum 0.60 to 0.95

Glass, pane 0.85 to 0.95

Rubber 0.92 to 0.95

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Trotec BP21 Seite 4

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Andere Handbücher von Trotec BP21

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info