TIGHTEN CONTROL OF YOUR
TEMPERATURE-CRITICAL PROCESS
WITH ACTIVE EMISSIVITY COMPENSATION
Material surface properties often change during the manufacturing
process as a result of oxidation or through the introduction of coatings.
This change affects the emissivity of the material being measured, which
is a critical parameter for accurate pyrometer temperature measurement.
Compared to pyrometers that use a fixed emissivity value, those with
real-time emissivity compensation enable much better accuracy and
repeatability by continuously measuring and correcting for changes
in substrate emissivity.
TEMPERATURE MEASUREMENT ACCURACY FOR AN OBJECT WITH CHANGING EMISSIVITY
Fixed Emissivity vs. Active Emissivity Compensation
1.0
Final Emissivity Value
Following Processing
1150
1050
Temperature (°C)
0.9
Corrected Temperature
Using AE® Onyx™-MCE
Emissometer
Primary Processing
950
0.7
Measurement
Error
850
Co
ol
Do
wn
0.6
mp
Ra
ure
t
a
er
mp
Fixed-Emissivity Pyrometer
Te
Temperature (Non-Corrected)
750
650
0.8
0.5
0.4
Emissivity (e)
1250
0.3
550
0.2
450
0.1
Emissivity Change
During Processing
0
25
0
15
20
0
0
0.0
10
50
0
350
Time (Seconds)
Process Profile (Actual Temperature)
Emissivity
Fixed Emissivity Pyrometer (Non-Corrected)
Onyx™-MCE Emissometer With Active
Emissivity Compensation
Measurement Wavelength: 1 μm
Talk to us about
improving your
process control with
active emissivity
compensation.
Click here.
› With active emissivity compensation,
temperature measurement accuracy r emains
constant despite substrate emissivity changes.
› Without active emissivity compensation, false
temperature measurements may be introduced
into your temperature-critical process, which
degrades temperature control accuracy and
product quality.
With real-time emissivity measurement
and compensation, Onyx™-MCE emissometers
achieve superior accuracy and repeatability.
For international contact information, visit advanced-energy.com.
ENG-ProcessCtrlEmissivityComp-400-02 11.16
©2016 Advanced Energy Industries, Inc. All rights reserved. Advanced Energy®, AE®, and Onyx™ are U.S. trademarks of Advanced Energy Industries, Inc.