Configuration And Setup; Signal Conditioning - Siemens ARDOCELL PA 4 Series Operating Manual

Digital two-colour pyrometer

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Operating manual PA

8 Configuration and Setup

8.1

Emissivity and Transmittance (Spectral mode)

Besides the emissivity correction (mentioned in Chapter 5.6), a pyrome-

ter must be adjusted for the transmission properties of any supplemen-

tary lens and/or protective window screwed onto the pyrometer. Set the

pyrometer for the specific transmission factor (a percentage value) which

is indicated either in the products's data sheet or on the lens itself. This

TAU.1

is parameter

and can be accessed at configuration layer

C002/C003

. If you are not using any auxiliary lens or protective win-

dow, set the parameter to 100.0.

Ambient Temperature Compensation (Spectral mode)

Under normal conditions, PA pyrometer should produce highly accurate

temperature readings once you have set the emissivity and transmit-

tance factors. Certain conditions, however, will require that you make an

additional correction. Object surfaces which have very low emissivity will

reflect thermal radiation from their surroundings. If your target object is in

surroundings which are hotter than the target itself, and the infrared radi-

ation coming from extraneous sources reflects off of the object, the sen-

sor will collect this additional energy. To ensure that the measurement is

not distorted and that temperature readings are completely accurate, you

should activate „Ambient temperature compensation" (switch on

C002/C003 / BAC.1

)

Now enter the temperature value of the ambient source of radiation and

its influence as a percentage. You will have to determine these variables

first.

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