Problems with this alarm relate to cable types such as self-regulating or power limiting, which will alter current draw during normal operation. System intelligence is not built into controllers to automatically predict acceptable tolerance based on measured temperature. System parameters such as installed length, cable down turn ratios as well as numerous temperature readings over the entire system would be required. Coupled with historical base line readings, a system operational footprint is required to provide tight tolerance. System Complexity Heat trace microprocessor-based temperature control and monitoring systems are based on the concept of mechanical thermostat replacement.
Simplicity seems to be a lost art.
Whether dealing with PC-based programs or industrial instrumentation, systems and requirements are becoming more complex while product life cycles are getting shorter. Most systems will benefit from continual improvement and enhanced capabilities, but there must be a balance between system enhancements and how easily they are understood and maintained by the end user. Over the years, systems have become equipped to provide more and more information. Interpreting and understanding the true meaning of the information has begun to require a higher skill level. Misinterpretation or undo concern are becoming the norm.