Siemens MPA 1 Series Instruction Manual page 12

Operating Manual MPA
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thus measuring the temperature from the near surface area of the glass.
Changes in thickness, different types of glass, or varying moisture con-
tents in the atmosphere do not affect the measurement reading owing to
the wavelength used.
The ARDOMETER MPA 29 was designed with a special band-stop filter
and sensor which ignore interfering IR radiation from sources such as
daylight or laser beams. ARDOMETER MPA 29 features a response
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.
The spectral pyrometers ARDOMETER MPA 2x and MPA 3x are used
for temperature measurements from 250 °C to 2000 °C or 500 °C to
3000 °C, respectively. Their applications cover large segments of the
iron and steel producing industry and the metal, glass, ceramics and
chemical industries.
To indicate the exact measurement spot the ARDOMETER MPA has a
through-the-lens sighting and focusable lens. Through-the-lens sighting
with target marker facilitates easy alignment to the target.
The instruments have rugged housings which make them ideal for use in
hostile industrial environments. ARDOMETER MPA pyrometers are
splash water proof according to IP65 (DIN 40050)
ARDOMETER MPA 1x features dynamic signal filtering known as a
"smoothing function". This provides a steady signal and allows the py-
rometer to respond quickly when the temperature of the targeted surface
fluctuates erratically.
The adjustable emissivity factor makes it easy to adapt the pyrometer to
the specific radiation characteristics of the particular material measured.
All pyrometers of the ARDOMETER MPA series have two analogue cur-
rent outputs, each is switchable from 0 - 20 mA to 4 - 20 mA.
The output currents are linear to the measured temperature. The re-
quired temperature range can be set at the pyrometer.
When ambient temperatures are higher than the admissible working
temperature, the output current is > 20.5 mA.
ARDOMETER MPA also features an analogue voltage input which can
be used as an alternative to current output 2. The emissivity factor or a
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