EGT & CHT gauges

JOHN TIPTON · Post by **JOHN TIPTON** » Tue May 08, 2012 11:46 pm

Hi Guys

When you fit your EGT & CHT gauges, wether steam or 'glass panel' do they need calibrating, I'm a bit naive on how these devices actually work.

John (RV9a - wings)

captain_john · Post by **captain_john** » Wed May 09, 2012 3:21 am

They don't (also can't be) get calibrated.

If you doubt their indication, they can be tested.

Why do you ask?

Does this help?

CJ

JOHN TIPTON · Post by **JOHN TIPTON** » Wed May 09, 2012 4:46 am

CJ, thank you, but what I guess I really want to know is how they work, can I connect any make of intrument (I like round dials) so if I go for other than the Vans dials, like UMA do they just get connected and away you go - also my fellow builder with his build is going all glass, again do the 'wires' just get connected to the Dymon
John

captain_john · Post by **captain_john** » Wed May 09, 2012 12:15 pm

How a temp sender usually works is like this...

They all have 3 wires. One is a positive and another is a negative. The magic is in the third wire. It sends a variable voltage (based upon the max potential applied to the first two wires) back to the instrument to indicate a value.

As far as interchangeability and what sender works with which instrument, I don't know.

Each instrument will either specify or provide it's own sender model.

Does this help?

CJ

JOHN TIPTON · Post by **JOHN TIPTON** » Wed May 09, 2012 11:53 pm

CJ - I do believe we are getting there - the 'standard' VANs EGT & CHT gauges are to be used with Electronics International probes and wires, so I just make sure I know what make of probes I need for my particular make of gauges, I'm now presuming !!! most are compatable with EI probes etc
Thank for all the help
John

captain_john · Post by **captain_john** » Thu May 10, 2012 12:29 pm

You are welcome John!

A little knowledge can be a dangerous thing!

Have fun!

CJ