Calex PyroUSB Series, Operator'S Manual

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PyroUSB Series infrared sensors measure the temperature of surfaces without contact.
They have a linear 2-wire 4 to 20 mA output, which is compatible with almost any indicator,
controller, recorder or data logger without the need for special interfacing or signal
conditioning.
A choice of measurement wavelengths and temperature ranges is available to suit a range of
applications.
General-purpose PUA8 (8-14 μm) models can measure from -40°C to 1000°C. They
are suitable for measuring high-emissivity materials such as paper, thick plastics, food,
pharmaceuticals, rubber, asphalt and painted surfaces.
Short-wavelength PUA2 (2.2 μm) models have a choice of temperature ranges from 45°C to
2000°C. They provide a more accurate reading when measuring low-emissivity materials such
as many reflective metals. They are also capable of measuring through glass viewports.
Glass PUA5 (5 μm) models can measure from 200°C to 1650°C. They are filtered at a
wavelength where glass is least reflective, making them ideal pyrometers for glass surface
temperature measurement.
SPECIFICATIONS
Model PUA2 PUA5 PUA8
Spectral Response 2.0 to 2.6 µm
(2.2 µm nominal)
5 µm 8 to 14 µm
Application Ferrous metals and
high-temperature
targets
Glass General purpose
Temperature range Choice of ranges
from 45°C to
2000°C
Choice of ranges
from 50°C to
1650°C
-40°C to 1000°C
Response time 200 ms
Output 2-wire, 4-20 mA, linear with measured temperature
Communications USB 2.0 (removable USB cable and software included) using the
Modbus protocol
Optics Choice of optics for small or large targets at short or long distances
(see Optics)
Accuracy ± 2°C or 1% of
reading, whichever
is greater
± 1°C or 1% of reading, whichever is greater
Repeatability ± 0.5°C or 0.5% of reading, whichever is greater
Emissivity Setting 0.1 to 1.0
Maximum Span
(4-20 mA output) Full temperature range
Minimum Span
(4-20 mA output) 100°C
ELECTRICAL
Supply Voltage 24 V DC (28 V DC max)
Sensor Voltage (minimum) 6 V DC
Maximum Loop Impedance 900 Ω @ 24 V DC