How to solve your furnace Pyrometry challenges
MEASUREMENT & MONITORING SMARTER HEAT SURVEYS
PHOENIX TM
How to solve your furnace Pyrometry challenges
Today’ s heat treatment industry is faced, daily, with the challenges of complying to regulatory standards. In this article, PhoenixTM, thruprocess temperature profiling and surveying specialist, addresses compliancy challenges in heat treatment temperature uniformity surveys.
In automotive manufacturing heat treated materials and parts are governed by CQI-9 and in aerospace AMS2750H( Issued 07 / 24 NADCAP AC7102 / 8). A key requirement of the pyrometry standards is to perform a Temperature Uniformity Survey( TUS) of the heat treat furnace. The aim of the temperature uniformity survey is to provide evidence that the furnace technology is providing accurate and uniform temperature conditions over its working volume.
The furnace is tested at critical temperature setpoints against target temperature tolerances to reflect the furnace classification and material / product heat treat processing certification requirements. Traditionally, a TUS is performed using a field test instrument accurate to ± 0.6 ° C or ± 0.1 % of temperature reading. The data logger is located externally to the furnace with thermocouples trailing into the furnace heating chamber.
The PhoenixTM PTM4220 external data logger( accuracy ± 0.3 ° C) is connected directly to a TUS frame used to measure the temperature uniformity with up to 20 thermocouples. For continuous( belt & pusher) furnaces, the PhoenixTM‘ Thru-process’ TUS principle overcomes the problems of trailing thermocouples. A multi-
Available with a RF Telemetry option, the TUS temperature data can be transmitted direct from the furnace to an external monitoring PC during the survey.
channel data logger( PTM1220 / 1210) travels into and through the heat treat process protected by a thermal barrier. The thermal barrier design and specification is customised to suit the process being monitored( Time / Temperature / Pressure etc). Accurate cold junction compensation technology provides a data logger accuracy of ± 0.3 ° C over the whole data logger operating range of 0 to 80 ° C / 110 ° C. This is essential, as the operating temperature of the data logger in use will change from its original calibration temperature.
Available with a RF Telemetry option, the TUS temperature data can be transmitted direct from the furnace to an external monitoring PC during the survey. The PhoenixTM Survey software is a custom designed software package developed specifically to address CQI-9 and AMS2750 requirements. The software allows full live data review( numerical & graphical), during the data collection step against the preset tolerance limits.
To maximise accuracy, data logger and thermocouple correction factors can be applied automatically in the software. Following TUS data collection, the survey software allows full TUS data analysis, furnace class assessment and creation of a fully compliant report against the specific deliverables of the pyrometry standards.
For further information, please visit www. phoenixtm. com
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