Keller ITS CellaPort PT 120, Operating Manual, Page: 11 / 72

Operating manual PT 11x, 12x,13x
5
The CellaPort PT 113 is specially designed to detect the temperature of
objects in flame-heated furnaces. Because the PT 113 works at a narrow
spectral range of 3.9 µm, water vapour and CO
2
in the detector’s field of
view will not influence the measurement, even at greater target distanc-
es.
The CellaPort PT 115 is specially designed to measure the temperature
of glass. Glass is transparent in the visible spectrum and near infrared.
The emissivity depends on the wave length, type of glass and thickness
of glass. In the range of 4.5
– 8 µm glass has an emissivity near 100%.
Above 5 µm atmospheric influences such as humidity or water vapor af-
fect the measurement. The CellaPort PT 115 has a special band-stop
filter with a spectral sensitivity of 4.6 - 4.9 µm. Thus, it measures the
temperature of the near surface region of the glass. Changes in thick-
ness, different types of glass or a change in the humidity in the atmos-
phere due to the wave length does not affect the measured values.
The PT 117 is used for measuring hot CO
2
combustion gases for exam-
ple in wasting plants, incinerators, coal power plants and other combus-
tion furnaces. The PT 118 measures at a specific wavelength, where hot,
organic combustion gases have a high optical density and therefore
good radiation properties
The spectral pyrometers CellaPort PT 120, PT 130 and PT 135 are used
for temperature measurements from 250 °C to 3000 °C. Their applica-
tions cover large segments of the iron and steel producing industry and
the metal, glass, ceramics and chemical industries.
The CellaPort PT 128/ PT 129 are designed with a special band-stop fil-
ter and sensor which ignore interfering IR radiation from sources such as
daylight or laser beams. CellaPort PT 128 and PT 129 features a re-
sponse spectrum which is far less sensitive to incidental light reflections
from nearby hot objects than most commonly available pyrometers which
are responsive at short wavelengths. It is suitable for various applications
in the metalworking industry, and is ideal for measuring reflective metals
and aluminium at low temperatures. With its band-stop filter, the
CellaPort PT 128 and PT 129 are highly accurate in capturing the tem-
perature of metal surfaces which are heat-treated by diode, Nd:YAG or
CO
2
lasers.
5.2 Operating Controls and Display
The rear panel of the CellaPort has a 4-digit display and 4 push-buttons.
The display normally indicates the currently measured temperature. Dur-
ing configuration (using the push-buttons), the display will show the pa-
rameter you are setting. Whenever the display shows a parameter, the