SECTION 4
PREVENTIVE MAINTENANCE
4.6 Severe or Stubborn Contamination
56
To clean dark or corroded copper connection points:
1
Apply a droplet of concentrated ammonium hydroxide (NH
4
OH,
28 to 30%) or household lime remover to the TC mount.
Soaking with this solution for a few minutes will reduce oxida-
tion and restore the bright copper color.
2
Rinse the thermocouple with pure water.
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