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INSTRUCTIONS FOR THE CONSTRUCTION OF A THERMOCOUPLE
The Geocacher interested in doing the Puzzle Cache GC5JGJE will have to make an Iron-Copper Thermocuple. Because the required materials, although not expensive, are not reliably available in small quantities. Therefore, small samples of the Iron and Copper wire will be provided at the first stage of the puzzle cache. It might be a good idea to print this page and bring it along when you attempt the Geocache.
1. Select one Iron and one copper wire from the supply. Please be sure to properly close the ziploc bags. Use piece of sand paper (supplied) to polish up about 1/2 inch of each end of each wire. This removes any oxide or tarnish on the wires to make sure that good electrical connections will be made when using the thermocouple.
5. Bend the wires around as shown below.
2. Using needle nose pliers (supplied) bend a small hook on one end of each wire.
6. Touch the end of your thermocouple wires to the test terminals of the continuity tester as shown below. The green LED should light brightly indicating that you have made a good connection at the junction. If the LED does not light, tighten the junction and be sure the ends of the wires are clean.
3. Interlock the two hooks as shown below:
7. Take your thermocouple to the next stage at the coordinates posted at the first stage. Connect your thermocouple to the red and black binding posts as shown below. The copper should be connected to the black (-) post and the iron to the red (+) post.
4. Using the pliers tightly close the hooks on each other as shown below. This forms the thermocouple junction.
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