E-Mail:[email protected]
We measure accurate temperature in extreme conditions

Billets Measurement With A150 Pyrometer

AST

Billets Measurement With A150 Pyrometer

The AST A5 pyrometer works on the multi-wave principle with an automatic emission compensation.

Emissions according to:

– Surface hue (light after polishing, dark after graphite spraying).

-Surface texture – As a derivative of the technology process of casting logs (typically for the same alloy variations of emissions, the range may be 0.4-0.8).

Billets Measurement

For such variations, the experimental error of AST A5 pyrometer for billet measurements: 

-Accuracy – fine-tuning at home (adjustment of the Dy Analytic parameter once, according to the Thermocouple reference).

-Mean error ± 0Cº with a standard deviation of 3Cº.

-In 3 measurements out of 1000, an error of ± 9Cº.

-In 50 measurements out of 1000, an error between ± 6-9Cº.

-95% of the measurement, will be between ± 0-6Cº.

Billets Measurement

The A150 pyrometer, is a single-wavelength instrument designed to work with objects whose emission capacity is constant.

Once you define the value, “ε” it only provides reasonable accuracy of the measurements If  “ε ” remains as you set it.

Galvanizing

In the case of aluminum billets in the extrusion process, the accuracy sample to be obtained using the A150, shall be as follows:

 

∨  Measurement accuracy of an aluminum Billet with one wavelength pyrometer  compared to measurement with a      thermocouple (TR)

 Billet average practice temperature TR (Temperature Real) = is 450˚C.

 To demonstrate the problematic nature of the measurement, we will perform some temperature measurements      on different billets and thus find the average emissivity; let us assume for the demonstration that the found            average emissivity is: ε = 0.6 (which is our fixed definition).

 This means that when the billet emission is ε = 0.6, the pyrometer

 Reading at TR = 450˚C, will be PT (Pyrometer Temperature) = 450˚C, error Δ = 0˚C.

 When for the same temperature billet TR = 450˚C, but the emission will be ε = 0.8,  PT (Pyrometer Temperature) =      418˚C and error Δ = – 32˚C.

 When for the same temperature billet TR = 450˚C, but the emissionwill be ε= 0.4, PT (Pyrometer Temperature) =         475˚C and error Δ = + 25˚C.

For the above reasons, we never recommend our customers use a single-wavelength pyrometer for aluminum extrusion processes (billets and profiles).

 

Such temperature error range makes the use of such pyrometers a waste of money and time. you can not use in any way for process control or any other helpful task.

Technical Solution Video
Billets Measurement

Send us your Inquiry / Feedback’s

Skip to content