Lumasense-technologies IS 210 Manuel d'utilisateur télécharger pdf (Page 9)

IMPAC pyrometers IS 210 · IGA 210

7 Parameter Settings

The setting of emissivity, response time and temperature

sub range can

only be done via service interface with the

portable setup device HT 6000 (see

8.1) or via USB

adapter for IN 210 and the software InfraWin (see

8.2).

On request the instrument also can be delivered with

presetting on demand.

7.1 Factory settings

Emissivity

= 100%; response time = 250 ms;

sub range = measuring range; clear time = Off;

ambient temperature compensation = auto; address = 00

7.2 Emissivity ε

The emissivity is the relationship between the emission of a real object and the emission of a

black body radiation source (this is an object which absorbs all incoming rays and has an

emissivity of 100%) at the same temperature. Different materials have different emissivities

ranging between 0% and 100% (settings at the pyrometer between 5 to 100%). Materials

which reflect more radiation have a lower emissivity and the emissivity setting of the pyrometer

needs to be adjusted accordingly. Additionally the emissivity is depending on the surface

condition of the material, the spectral range of the pyrometer and the measuring temperature.

Typical emissivity values of various common materials for the two spectral ranges of the in-

struments are listed in the emissivity table below. The tolerance of the emissivity values for

each material is mainly dependent on the surface conditions. Rough surfaces have higher

emissivities.

Emissivity ε

Emissivity ε

Measuring

object

IS 210

(at 0.9 µm)

IGA 210

(at 1.6 µm)

Measuring

object

IS 210

(at 0.9 µm)

IGA 210

(at 1.6 µm)

Blackbody source 1 1

Zinc 0.58 0.45 - 0.55

Steel heavily scaled 0.93 0.85 - 0.9

Nickel 0.22 0.15 - 0.2

Steel rolling skin 0.88 0.8 - 0.88

Gold, Silver, bright 0.02 0.02

Steel, molten 0.3 0.2 - 0.25

Porcelain glazed 0.6 0.6

Slag 0.85 0.8 - 0.85

Porcelain rough 0.8 - 0.9 0.8 - 0.9

Aluminum, bright 0.15 0.1

Graphite 0.8 - 0.92 0.8 - 0.9

Chromium, bright 0.28 - 0.32 0.25 - 0.3

Chamotte 0.45 - 0.6 0.45 - 0.6

Brass oxidized 0.65 - 0.75 0.6 - 0.7

Earthenware, glazed 0.86 - 0.9 0.8 - 0.9

Bronze, blank 0.03 0.03

Brick 0.85 - 0.9 0.8 - 0.9

Copper, oxidized 0.88 0.7 - 0.85

Soot 0.95 0.95

7.3 Response time t

The response time is the time interval between the instant of an abrupt

change in the value of the measuring temperature and the instant from

which the measured value of the pyrometer remains within specified limits.

The time is taken to reach 90% of the recorded temperature difference.

Longer response times can be used for the measurement of objects which

have rapidly fluctuating temperatures to achieve a constant temperature reading.

Service

interface

Sealing

cap

Settings:

20 ms

10 s

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 27 28

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Lumasense-technologies IS 210 Manuel d'utilisateur Page 9

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