Siemens Ardoptix PT 140 AF1, Operating Manual, Page: 21 / 68

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Operating manual
13
Measurement two-colour/ratio mode configuration layer C001
Parameter Function Explanation
E.IDX
Memory position
Shows current selected emissivity ratio con-
stant, e.g.
E. 02
12 Determining and Setting Emissivity (Spectral mode)
In pyrometry, the specific radiation characteristics of the measured object
will influence the generated temperature data. In order to produce accu-
rate and reliable temperature readings, the pyrometer must be config-
ured according to the specific material constant (emissivity).

In spectral operation mode, emissivity can be set at the pyrometer using
the
▲▼
buttons. This changed setting will apply immediately to the cur-
rent temperature measurement
13 Initializing emissivity factors (Spectral mode)
The Ardoptix lets you store up to 10 emissivity factors for lambda 1 and
lambda 2. Before you perform a new measurement, simply use the
▲▼
control keys to select your preconfigured emissivity factor. When you se-
lect a stored emissivity factor, the display will briefly show the preconfig-
ured factor for that emissivity factor.
13.1 Define number of emissivity constants in array
Before you configure the pyrometer with emissivity factors, you must de-
fine the size/length of the array. This is the number of material constants
you would like the array to contain (10 maximum). Using parameter
E.TB.1
/
E.TB.2
, enter the total number.
Once you have configured the emissivity parameter, the
pyrometer will maintain this specific setting. The pyrome-
ter will always operate with this value unless you change
the setting.
!
To determine the correct setting of the emissivity of a compara-
tive measurement is carried out by a contact measurement. In
order to minimize measurement differences between the two
different physical measuring methods, the comparison meas-
urement is almost the same time and performs at the same
measuring point as possible
.