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 The condition of the inhibitor can be checked by a manufacturer's test kit or a
laboratory. Another good method is to use pH tape or paper. If the pH is below 6,
the fluid must be reinhibited or replaced. See section 3.1.6 for additional information.
FIGURE 4-7
A Dowfrost Test Kit
and a Dow Optical
Refractometer
TROUBLESHOOTING
4.3 TROUBLESHOOTING OPERATIONS
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