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Apri/ChiudiCartridge Heaters
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Apri/ChiudiMicrotubular Coil Heaters
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Apri/ChiudiNozzle Heaters
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Apri/ChiudiFlat Heaters
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Apri/ChiudiTubular Heaters
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Apri/ChiudiCartridge Heaters for Radiators
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Apri/ChiudiInfrared Radiant Heaters
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Apri/ChiudiFully-Ceramic Heaters
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Apri/ChiudiThermocouples & Resistances
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Apri/ChiudiHeating Cable
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Apri/ChiudiFlexible Heating Tapes
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Apri/ChiudiDrum Heaters for Barrels
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Apri/ChiudiMoSi2 Heaters
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Apri/ChiudiAir Heaters
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Apri/ChiudiThermoregulators
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Apri/ChiudiTemperature Control Units
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CARTRIDGE HEATERS - HIGH WATT DENSITY WITH TC - RECOMMENDATIONS

 
 
 
IMPORTANT INFORMATION FOR OPTIMAL USE OF HEATERS UTC TYPES 1-2-3-4
As shown in the drawing above, in heaters with thermocouple UTC 1 and UTC 2 the sensing join of the thermocouple is located at one end of the cartridge, sensibly colder than the body of the cartridge. This causes the thermocouple to sense heat with a certain delay to its production in the heating core of the cartridge.

Therefore, if the heater is controlled by an electronic thermoregulator, great care must be put in setting its switching temperature to avoid burning the heater just because the thermocouple is exposed to heat much later than the central body of the heater.

If the heater is in free air (or in a small metal body with more than 10 W/cm), it is advisable that the limit temperature is set (at start-up) at values increasing by intervals of, say, 100C (example: 80C, 180C, 280C, etc., till desired value), with a necessary resting time before re-switching-on at each increase of the limit value. This because of the risk of the heater’s burning before the thermoregulator switching off (for example, the body could go over 1000C before the thermocouple reaches 500C).

If the heater is inserted in a greater metallic body, in a hole honed to H7 tolerance, it is possible to directly set the thermoregulator at the target working temperature straight from start-up.

With UTC 3 and UTC 4 heaters the above precautions are normally not necessary.

If the temperature control has a soft-start function, the above precautions can be reduced, nonetheless, trial cycles are always advisable.
 

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