EasyManuals Logo

SensorTherm METIS M322 User Manual

Default Icon
58 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #21 background imageLoading...
Page #21 background image
METIS M311 / M322 / H311 / H322 (17-pin)
Pyrometer Parameters / Settings
21
as possible, as here the emissivity is
higher than in the long-wave range.
The specified values are guide values,
which were determined in the laborato-
ry and confirmed in application-
oriented measurements. They can
vary due to material-dependent condi-
tions, as in metals additionally to the
surface texture alloy components play
an important role for the emissivity.
Is a range given, this is related to
differences in the nature of the sur-
face from smooth to rough, rough
surfaces have higher emissivities
(for determining the correct emis-
sivity also a comparison measure-
ment can be performed with a ther-
mocouple).
“n.s.“ (not specified)means that no
values exist for this wavelength
range , e.g. because a reasonable
measurement in this wavelength or
temperature range is not possible.
The emissivities with "shiny" refer to
applications that are performed un-
der an inert gas or in a vacuum.
Magnesium, oxidized
n.s.
0.3-0.5
Brass, shiny
0.5-0.7
0.5-0.7
Brass, oxidized
0.6-0.8
0.6-0.7
Molybdenum, oxidized
0.7-0.9
0.7-0.85
Nickel
0.22
0.15-0.2
Porcelain, glazed
0.6
0.6
Porcelain, rough
0.8-0.9
0.8-0.9
Platinum
0.4
0.35
Soot
0.95
0.95
Chamotte
0.45-0.6
0.45-0.6
Slag
0.85
0.8-0.85
Silver, shiny
n.s.
n.s.
Silver, oxidized
0.1-0.2
0.05-0.2
Steel, shiny
0.4-0.55
0.3-0.45
Steel, oxidized
0.8-0.9
0.7-0.9
Steel, rolled
0.8-0.9
0.8-0.9
Stoneware, glazed
0.86-0.9
0.8-0.9
Stainless steel
0.4-0.9
0.4-0.9
Titanium, shiny
0.35-0.45
0.3-0.4
Titanium, oxidized
0.55-0.85
0.55-0.85
Tungsten, shiny
0.3-0.4
0.3-0.4
Tungsten, oxidized
0.7-0.9
0.7-0.85
Brick
0.85-0.9
0.8-0.9
Zinc
0.45-0.58
0.45-0.55
Measurement deviations at a 10% false set emissivity
at a temperature of 700°C:
+10%
-6.5°C
-10.5°C
-10%
+7°C
+11.5°C
6.3 Transmittance
Is a viewing window located between measuring object and pyrometer, the transmittance of the window
must be considered during the measurement. Enter the transmittance of the window in order to obtain a
correct measurement result.
6.4 Spot Size Fill Factor
Entering a fill factor that indicates how much percent of the measuring field is filled, has no influence if
using the 2-color measuring mode (see also 5.4 Alignment to the Measuring Object).
In 1-color mode: Measurements of objects that are smaller than the pyrometer’s spot size can be per-
formed when measuring hot objects in front of a cold background. In this case the fill factor specifies
how much percent the measuring field is filled.
INFO: Emissivity, transmittance and spot size fill factor are directly related to each other, the re-
sult of the multiplication of the 3 parameters has to be minimum 5%.
6.5 Switch-off Level
2-color pyrometers measure even with reduced signal strength, such as those occur in a partially filled
measuring field, or dust, smoke, steam, or a window in the beam path between pyrometer and the
measuring object. If the signal strength is too low for a reliable measurement, the measurement is
switched off to avoid measurement errors. In this case the current output can be set to 0 or 4 mA or
20 mA, and also serial interface settings can be defined.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the SensorTherm METIS M322 and is the answer not in the manual?

SensorTherm METIS M322 Specifications

General IconGeneral
BrandSensorTherm
ModelMETIS M322
CategoryMeasuring Instruments
LanguageEnglish

Related product manuals