|
|
|
|
— |
test_equipment:soldering_thermo_couples [2013/01/08 19:00] (current)
|
| | ====== Soldering Thermo Couples ====== |
| |
| | Let's talk a little about thermocouple wire alloys: |
| | |
| | There are about 6 principal thermocouple pairs in common use: |
| | |
| | * Type E - CR-CN |
| | * Type J - Fe-CN |
| | * Type K - CR-AL |
| | * Type R - Pt/13/Rh-Pt |
| | * Type S - Pt/10/Rh-Pt |
| | * Type T - Cu-CN |
| | |
| | Where, |
| | |
| | * Cu == Copper |
| | * CR == Chromel |
| | * CN == Constantan (53%Cu, 45%Ni) |
| | * Al == Alumel |
| | * Fe == Iron |
| | * Pt/10/Rh == Platinum + 10% Rhodium |
| | * Pt/13/Rh == Platinum + 13% Rhodium |
| | * Pt == Platinum |
| | |
| | Each of these alloy combinations makes a dandy thermocouple, but each also has unique characteristics relative to soldering with conventional tin/lead solders, or welding. |
| | |
| | * Type E won't solder |
| | * Type J solders nicely |
| | * Type K won't solder |
| | * Type R won't solder |
| | * Type S won't solder |
| | * Type T solders nicely |
| | |
| | Basically any alloy that has significant quantities of Chromium, Platinum, Rhodium, or Aluminum will be difficult to solder. |
| | |
| | Copper solders nicely, iron solders nicely, nickel pretty well.., |
| | |
| | -Chuck Harris |
