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Figure 3.5: Overview of heating unit.
3.4.1 Gas Heater
The AHP series in-line gas heaters from Omega Company, as shown in figure 3.6, is used
to heat clean, dry air or gas for temperature chamber. AHP series gas process heaters provide hot
air and gas up to 1000°F (540°C) with infinite control by varying the voltage and/or the air flow
[20]. The controller of gas heater is CN63100 type closed loop controller which is also from
Omega Company. One temperature sensor "T" fittings is connected to gas heater to be a holder
for RTD sensor. A PRTF Type 3-wire general purpose RTD probes with fiberglass insulated
cable is used to be heater’s temperature measuring unit.
Figure 3.6: OMEGA – AHP series gas heater.
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