Emissivity
91
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9.2 Determination of unknown emissivity
► First determine the actual temperature of the measuring object with a thermocouple or contact sensor.
Second, measure the temperature with the infrared thermometer and modify the emissivity until the
displayed result corresponds to the actual temperature.
► If you monitor temperatures of up to 380 °C you may place a special plastic sticker (emissivity dots –
Order No.:
ACLSED
) onto the measuring object, which covers it completely. Set the emissivity to 0.95
and take the temperature of the sticker. Afterwards, determine the temperature of the adjacent area on
the measuring object and adjust the emissivity according to the value of the temperature of the sticker.
► Cove a part of the surface of the measuring object with a black, flat paint with an emissivity of 0,98. Adjust
the emissivity of your infrared thermometer to 0,98 and take the temperature of the colored surface.
Afterwards, determine the temperature of a directly adjacent area and modify the emissivity until the
measured value corresponds to the temperature of the colored surface.
CAUTION:
On all three methods the object temperature must be different from ambient temperature.
Summary of Contents for CTlaser 05M
Page 1: ...Operator s Manual optris CTlaser LT LTF 05M 1M 2M 3M MT F2 F6 G5 P7 Infrared thermometer...
Page 8: ...8 Appendix C Smart Averaging 96 Appendix D Declaration of Conformity 97...
Page 44: ...44 Figure 2 Mounting bracket adjustable in one axis Order No ACCTLFB standard scope of supply...
Page 45: ...Mechanical Installation 45 Figure 3 Electronic box...
Page 97: ...Appendix D Declaration of Conformity 97 Appendix D Declaration of Conformity...
Page 98: ...optris CTlaser E2018 12 A...
