A2TPMI334 OAA060 / 625 Excelitas Technologies Sensors, A2TPMI334 OAA060 / 625 Datasheet - Page 11

• Manufacturer Part Number: A2TPMI334 OAA060 / 625
• Description: Thermopile Modules with Integrated Signal Processing (TPMI)
• Manufacturer: Excelitas Technologies Sensors

Specifications of A2TPMI334 OAA060 / 625

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

Application Information
Ambient Temperature Compensation
Because of many physical effects that influence the non-contact temperature measurement based on
infrared radiation, it is difficult to meet the best initial adjustment for a specific application. Therefore some
deviations might be found at first measuring. For all applications the optimized solution can be prepared
and fixed based on the measurement in the application environment. PerkinElmer will be pleased to assist
you in finding the conditions, which deliver the highest accuracy in your application.
The temperature compensation is only working well within a certain ambient temperature range, limited by
different device parameters of the thermopile sensor and the temperature reference sensor. The following
diagram shows the typical characteristics and is only an example in order to better understand the principle
compensation curve. The curve shows the deviation for a compensated module that functions correctly.
The compensation of the module sample in the diagram is adjusted to the best fitting at 20° C to 80° C
ambient temperature, but the curve can be shifted in the whole ambient temperature range through the
change of A2TPMI parameters.
Measurement Tolerance
The temperature error of the A2TPMI depends on several factors like the emissivity, object temperature,
object size to spot size relation, temperature gradients over the sensor housing in the environment, device
tolerances and the optimal adjustment of the ambient temperature compensation.
The accuracy as specified under V
as on statistical evaluation results. The PerkinElmer quality system ensures that all A2TPMIs are calibrated
and tested under certain test conditions in order to guarantee these specifications.
However, due to the nature of infrared remote temperature measurements there might be deviations or
limits that are exceeded in specific application environments. In this case please contact the PerkinElmer
application support to help you solve the problem.
w w w . o p t o e l e c t r o n i c s . p e r k i n e l m e r . c o m
-20
-0,5
2,5
1,5
0,5
3
2
1
0
Temperature Deviation of VTobj vs. Ambient Temperature
0
20
Tamb
Ambient Temperature [° C]
and V
Tobj
40
characteristics is based on theoretical calculation as well
60
80
100
A 2 T P M I ® D a t a s h e e t
Figure 2
1 1