System description
1
Operating Instructions Radiation sensors R3XX
1 System description
1.1 Properties and fields of use
INFRA radiation sensors from the R 3XX series are robust, stationary
measuring sensors that are used in connection with indicating devices,
controllers or recording instruments for contact-free temperature
measurement and temperature monitoring, control or registration.
They enable you to record surface temperatures quickly and reliably even in
situations where traditional contact-based measurement is very difficult, is
only possible to a limited extent or is not actually possible at all. For
instance, they can be used on moving objects, materials with a poor thermal
conductivity, plastic materials and aggressive substances, small components
with a low thermal capacity, current-carrying elements and rails.
The radiation sensor collects the thermal radiation emitted from the
measurement object and uses a lens to concentrate it on the internal
infrared sensor. An optical filter restricts the sensor’s spectral region.
The IR sensor transforms the collected heat energy into an electric signal,
which is then processed in a microprocessor and converted into a linear
current output of 4...20 mA. The influence of the ambient temperature on the
measuring cell and electronics is compensated.
Sensors from the R3XX series are designed using the two-wire technique.
They therefore allow measured values to be transmitted so as to be immune
to interference – even over long distances – and make wiring particularly
simple. Interfering measured value peaks that occur in quick succession can
be suppressed by a variable attenuator.
The size of the measuring field recorded depends on the optics of the sensor
concerned and on the distance between the sensor and the measurement
object (see measuring field diagrams). It is possible to set the emission
factor (which is important for the radiation measurement), the transmission
factor and other parameters.
An interface with a HART
®
protocol is used to transmit the measured values
from the sensor and to transmit program information to the sensor.
Thanks to the features mentioned, measurement sensors from the R3XX
series can also be used in places where other measuring systems fail due to
unfavourable ambient conditions. Examples include:
Thermoforming machines for plastics
Extruders for plastics
Calendering lines for plastic films
Coating machines
Glassworking
Metalworking
Monitoring of goods in transit on conveyor belts
Monitoring of plant overheating
To Next Page
Loading...
Need help?
General