Many of the surface mount thermocouples were either out of stock or high priced so I decided to try making some using left over thermocouple wire.
The ends of the wires were stripped, twisted together and clamped with forceps. A piece of graphite from a carpenter's pencil was held in a vice. Jumper cables were attached to a lawn mower battery, the vice and forceps. Touching the ends of the thermocouple wires to the graphite block fused the wires together.
3/8" fuel line were cut into about 1.5" long pieces, then cut part way lengthwise and opened up like a T. Nutplates were attached. JB Weld (which is non-conductive) was used to pot the thermocouple probe, keeping the bare wire off the bare metal. I tried to use a minimum amount of JB Weld to keep the mass of the probe minimal.
 |
| The probes measured within 1 degree F of the test meter's probe. |
I drilled a screw hole in the heat shields aft and just above the brake rotor to make it easy to mount and access.
Wires had been run down the gear legs previously in anticipation the probes. They go up through the hell hole to the Dynon EMS 220 module.
How to set up Dynon widgets:
Brilliant as well as resourceful, Mike.
ReplyDelete