Thermocouple Order - which goes first EGT or CHT?

Thermocouple Order - which goes first EGT or CHT?

In all MGL Avionics instruments (except iEFIS), including Velocity Singles and Infinity Singles and all RDAC connections for MGL Avionics Enigma, Odyssey and Voyager EFISs, the following rules apply regarding the order in which EGT and CHT probes are connected:

Rule 1: EGTs go first (all in a row)
Rule 2: CHTs go next (all in a row)
Rule 3: No gaps. Don't leave spaces between EGTs and CHTs when connecting to device.

Examples:

If you have 1 EGT and 1 CHT:

TC Channel 1: EGT
TC Channel 2: CHT

If you have 2 EGTs and 2 CHTs:

TC Channel 1: EGT
TC Channel 2: EGT
TC Channel 3: CHT
TC Channel 4: CHT

If you have 4 EGTs and 4 CHTs:

TC Channel 1: EGT
TC Channel 2: EGT
TC Channel 3: EGT
TC Channel 4: EGT
TC Channel 5: CHT
TC Channel 6: CHT
TC Channel 7: CHT
TC Channel 8: CHT

If you have 1 EGTs and 4 CHTs:

TC Channel 1: EGT
TC Channel 2: CHT
TC Channel 3: CHT
TC Channel 4: CHT
TC Channel 5: CHT

Etc...

 

For iEFIS, you can put them in another order (EGT or CHT first), as long as you connect them to the RDAC in banks

    • Related Articles

    • Can I extend CHT and EGT Thermocouple probes?

      Should you wish to increase the length of the leads of your CHT or EGT probes, this can be done. Our type-K EGTs and CHTs probes should be extended with type-K extension wire directly to the RDAC, or if the RDAC is mounted outside the engine ...

    • CHT Thermocouple Probe Wiring and Setup

      Attached are settings and wiring connections for Cylinder Head Temperature senders. This guide can be used to help if you are experiencing problems or if you suspect your CHTs are reading incorrectly.  Remember to follow these 3 Steps first when ...

    • EGT Thermocouple Probe Wiring and Setup

      Attached are settings and wiring connections for Exhaust Gas Temperature senders. This guide can be used to help if you are experiencing problems or if you suspect your EGTs are reading incorrectly.  Remember to follow these 3 Steps first when ...

    • EGT Thermocouple Probe Type?

      Most Aviation EGT probes are type-K thermocouples (because the temperature range of type-J thermocouples is not has high as is required for EGT). All MGL Avionics EGTprobes are TYPE-K. Note that the polarity of Type-K Thermocouples is not intuitive, ...

    • CHT Thermocouple Probe Type?

      Most Aviation CHT probes are either Type-K or Type-J thermocouples. All CHT probes sold by MGL Avionics are Type-K. Many CHT probes available in the US are type-J. Please contact manufacturer to find out what type they are. If you use the wrong type ...