| #15 Air Purging is Recommended When Using Water Cooling |
| Very often the environment inside an oven contains vapors from the process which may condense on cooler surfaces inside the oven. When an IRt/c is used inside the oven to monitor the temperature of the process, the IRt/c must be cooled if the environment is above 212°F (100°C). Using the convenient IRt/c Cooling Jacket Kit available, either air or water may be used. For temperatures above 700°F (370°C) water is required, along with a small amount of purge air. The purge air has two important functions: |
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| 1. It keeps the IRt/c lens clear of vapors that would condense on its window, since the window temperature might be below the condensing temperature of some of the vapors of the process. |
| 2. The internal convective heat transfer characteristics are optimal for cooling at very high environmental temperatures. |
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| The IRt/c.3x is particularly suited for this service since the air consumption required to keep its lens clean is as little as .01 CFM (300 cc/min). A small convenient self-contained air pump is available. |
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