123ArticleOnline Logo
Welcome to 123ArticleOnline.com!

ALL >> Hardware-Software >> View Article

How Egt Probe / Sensors Work

By Author: Joseph Polizzotto
Total Articles: 71

A Thermocoupler consists of two wire legs made from different metals. These legs are welded at one end to create a junction and this is where the temperature is measured. If heat is applied to the junction, the metal expands generating a tiny electrical pulse called ‘Seebeck voltage’. The voltage being generated is directly correlated to the heat being applied and the type of metals being used in the thermocoupler. Conversely, if we know the volts being generated, we can figure out the temperature.

Of course, one does not need to sit with a calculator or for that matter, do any calculation to figure out the temperature in the aircraft cylinder. Each GT gauge is carefully calibrated to indicate the correct temperature based on the voltage received.

However, it is important to know that since the voltage being generated is very tiny (measured in milli volts), it is vital to ensure that the wires leading to the gauge are not near any electrical source or anything that might even generate static electricity. Ideally, the wires should be adequately shielded to prevent contamination from any external electrical source otherwise; the RPM Sensor might not indicate the correct reading.

There should be one EGT Gauges per cylinder so you can compare readings from both. Each analog EGT probe has two wires; one to be connected to the #1 connector of the EGT probe in the cockpit and the other (black) should be connected to #3 connector of the EGT gauge.

Be sure to get the polarity right and also ensure there is good continuity all the way to the gauge. Also, do not cut the Digital Gauges leads. If you need to lengthen the wire, use standard 18-gauge wire to a maximum of 15'.

Tip: Before you actually install an EGT, check probe and gauge using a heat source (e.g. propane torch).

The Visual (spark plug) test for EGT probes.

This is a rough visual check to ensure the EGT probes are working well. This test works on the basis of the fact that spark plugs change colour depending on the heat being generated within the cylinder head. At cooler temperatures the spark plugs are dark coloured but as the temperature within the aircraft cylinder rises, the spark plugs slowly change colour to tan and at even higher temperatures; to grey / white.

Here’s how the test is done:

After fitting the EGT probe(s), run the aircraft engine and do a visual check of the EGT gauge(s) and the spark plugs. Initially, the spark plugs would be dark coloured but slowly, as the EGT gauge indicates 1100 to 1200 degrees F, the spark plugs will have become tan coloured and at very high temperatures, the spark plugs will become almost white. You now know that your EGT gauge and probe is working reasonably well.

Visit Here For More Information : https://www.jpinstruments.com/

Total Views: 78Word Count: 475See All articles From Author

Hardware/Software Articles

1. Why Social Throb Is The Best Brand Reputation Management Tool In India?
Author: Hendri Larson

2. Social Media Reputation Management
Author: Hendri Larson

3. Online Reputation Management Services
Author: Hendri Larson

4. Effective Strategy & Best Practices Of Qa In Devops
Author: Michael Wade

5. Dreamteam's Literom As University Erp Software
Author: Mukesh Tiwari

6. Unlocking Electric Vehicles Industry Potential With Excellon 5 Platform
Author: Rahul Sutraj

7. The Importance Of Load Testing In Software Testing
Author: Michael Wade

8. Crm | Ecrm | Crm Software | Crm Solutions
Author: John Cole

9. Erp For Automotive Manufacturing
Author: Eresource Infotech

10. Erp For Steel Manufacturing
Author: Eresource Infotech

11. Erp For Lean Manufacturing
Author: Eresource Infotech

12. Erp For Chemical Manufacturing
Author: Eresource Infotech

13. Erp For Plastic Manufacturing
Author: Eresource Infotech

14. Erp For Batch Manufacturing
Author: Eresource Infotech

15. Erp For Garment Manufacturing
Author: Eresource Infotech

Login To Account
Login Email:
Forgot Password?
New User?
Sign Up Newsletter
Email Address: