Temperature monitoring system

A monitoring device for monitoring thermal operating characteristics of an engine including turbine and piston engines comprising:

• a first plurality of thermocouples located in first temperature monitoring zones within the engine for measuring the temperature of said first temperature monitoring zones and for generating corresponding first temperature output signals;
• a second plurality of thermocouples located in second temperature monitoring zones within the engine for measuring the temperature of said second temperature monitoring zones and for generating corresponding second temperature output signals;
• a third plurality of thermocouples located in third temperature monitoring zones within the engine for measuring the temperature of said third temperature monitoring zones and for generating corresponding third temperature output signals;
• a multiplexing circuit for automatically and sequentially scanning and detecting said first, second and third temperature output signals;
• means for converting said scanned temperature output signals to digital information;
• an electronic processor for continuously generating a first temperature difference signal representing the temperature difference between the hottest and coldest zone of said first temperature monitoring zones, a second temperature difference signal representing the temperature difference between the hottest and coldest zone within said second temperature monitoring zones and a third temperature difference signal representing the temperature difference between the hottest and coldest zone within said third temperature monitoring zones;
• means for storing said digital information and said first, second and third temperature difference signals;
• first display means for alternately displaying the number of the temperature monitoring zone within said first, second and third temperature monitoring zones having the hottest temperature;
• second display means for alternately displaying said first, second and third temperature difference signals;
• and
• third display means for alternately displaying the temperature of the hottest zone within said first, second and third temperature monitoring zones.