• Range 650 - 1700 °C
• Maintenance-free, wear-free system measures the pour stream temperature at casting machines
• Optics with rectangular target spot ensures reliable temperature data even when pour stream position varies
• ATD function automatically records a temperature for each cast object
• Dual wavelength technique yields accurate readings despite smoke or dust in the sight path
•  Sighting options: through-the-lens sighting or video camera

 

For optical temperature detection in metal casting operations, a pyrometer is focused on the free falling liquid metal stream just as it is poured into the mold. The ATD function (automatic temperature detection) automatically identifies when the pour begins and dynamically adapts the measuring time to the duration of the pour stream. A temperature reading is produced for each cast workpiece, providing continuous verification of compliance with temperature requirements. If, for example, operations are disrupted due to a functional disturbance,and the liquid metal in the ladle cools to below the minimum permissible immediately to prevent the costs associated with the production of scrap. Temperature readings shown on the LED display panel and are easy to read from a great distance. Simultaneously, the pyrometer uses the analogue output and two serial interfaces for data output and network communications capability. An alarm horn can be used to provide an audible signal when temperatures are outside of the permissible range.

 

Liquid metal presents a unique challenge due to the composition of its surface which is particularly susceptible to slag and oxides. To obtain accurate temperature data, it is essential that the pyrometer only detects and processes the IR energy emitted from the bare metal surface. CellaCast PA 83 is equipped with a special algorithm which filters out the signal obtained from the metal surface which is free of slag and oxides. Different alloys (e.g. SG iron, grey iron) will feature slightly different infrared radiation properties. The specific emissivity can be determined by performing a comparison measurement using a thermocouple. This material constant

 

CellaCast PA 83 features two analogue outputs which the user can custom configure The second analogue output can be used to monitor a specific process temperature such as the device’s internal temperature. If this is too high, it could indicate that the permissible ambient temperature has been exceeded or the cooling jacket(if used) is malfunctioning. Alternatively, one of the signal outputs can be configured as an input. When used together with the material selection switch VK 30.01, you can choose one of the four custom-configured ratio settings for the specific material being cast.

 

 

CellaCast PA 83 features two switching outputs which provide a variety of configuration possibilities. These outputs can be used to monitor compliance with configured limit values or to trigger a status indicator. A switching output can also be used to synchronize data communication to the PLC in order to transmit one temperature reading per cast mold. Each of the switching outputs can be configured as gate inputs, for instance to control the maximum value reset command.

 

A pyrometer is an optical means of measuring temperature. The quality of the instrument‘s optics greatly affects the precision of the measurement. CelllaCast PA 83 features a lens system which is optimized for the visible and infrared range. The superior glass lens features an antireflective coating. It is robust, easy to clean and suitable for harsh industrial environments. Due to its superior imaging properties,the high-precision lens provides consistently high optical resolution across the entire focusing range. The lens system is infinitely adjustable to the exact required distance between pyrometer and target. The large field of view, parallax-free imaging, and through-the-lens sighting help the user focus on the target. The ocular features a widened interpupillary distance, making it suitable for users who wear glasses.

 

A sensor detects the infrared radiation emitted by an object‘s surface. Special signal processing combined with high-resolution analogue-todigital conversion enables a wide measuring span. The temperature resolution remains uniformly high across the entire measuring range.

 

Parameters can be configured during running operations using the rear keypad. The large control keys are easy to access and operate. The brightly lit 8 mm digits on the LED display are visible from a great distance. Two status LEDs can be custom configured to indicate operating conditions.

 

During commissioning and operation, a test current or a temperature can be applied to perform diagnostic and simulation functions. Without requiring a hot object in the field of view, it is possible to test the entire signal path to the transducer and to the control system.

 

The CellaCast PA 83 is equipped with a USB interface and RS 485. Both enable remote configuration and temperature data transmission to a data acquisition system. Because the communications software is already integrated into the device, the pyrometer is simple to operate with any PC, regardless of language or operation system used. CellaMevis software, which is supplied with the pyrometer, can also be used to set parameters, to provide online graphical display and to archive measurement data.


 

CellaCast PA 83 is equipped with a signal attenuation monitoring function (SAM) that can detect and indicate a decrease in the IR signal intensity due to a dirty lens or window, or caused by obstructions (such as dust) in the pyrometer‘s line-of-sight. 

The sensitivity of this function is user -adjustable.


 

As an option, the pyrometer can be equipped with a built-in video camera to view the target. Based on the latest HDR technology, the camera provides a higher dynamic range from the imaging process and automatic exposure control. The video image appears without overexposure and glare across the pyrometer‘s measuring range. Another special feature is TBC (target brightness control). The light sensitivity adapts dynamically to the target object captured within the rectangular measurement area to produce a high-contrast image of the target, regardless of whether the object focused on is cooler or hotter than the background. The video signal also transmits the measurement data. The temperature reading is superimposed onto the screen.


 

The PZ 20/A air purge creates air flow to prevent dirt from settling on the lens. Used together with the PZ 20/C intermediate tube and the PZ 10/T dust stop, the system provides maximum efficiency with minimum air consumption.

 

 

The PA 20/M cooling jacket provides protection against dirt and high ambient temperatures. It can be operated with either water or air as a coolant. The pyrometer is easy to install/ remove without tools. The cooling jacket features a glass window on the back and thus does not obstruct the pyrometer‘s display panel.

 

 

Mounting assembly PA 83-002 for pyrometers with through-the-lens sighting consisting of:

 

• Pedestal mount PB 08/K
• Cooling jacket PA 20/M AF 1
• Clamping collar PZ 20/L AF 2
• Air purge PZ 20/A
• Intermediate tube PZ 20/C
• Dust stop PZ 10/T

 
 

 

Mounting assembly PA 83-003 for pyrometers with video camera consisting of:
 

• Pedestal mount PB 08/K
• Cooling jacket PA 20/M AF 2
• Clamping collar PZ 20/L AF 2
• Air purge PZ 20/A
• Intermediate tube PZ 20/C
• Dust stop PZ 10/T