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dc
paddle
The Model 785 / 790 DC Holiday Detector comes with a DC Paddle to
assist in the location of Holidays (defects in the coating). Due to the low
voltage of the Model 785 / 790 DC Holiday Detector the spark that jumps
the gap from the electrode to the substrate when a holiday (defect in the
coating) is found can sometimes be hard to see as opposed to using a
higher voltage detector which produces a larger brighter spark. The DC
Paddle acts as an extension of the spring electrode giving the user a
wider path to test areas the user suspects are producing the holiday but
can’t see during standard detecting travel speed.
Immediately after the holiday detector indicates a fault, roll the spring
electrode back approximately 2 - 3 inches. Place the edge of the
conductive rubber paddle against the spring and wipe the paddle around
the entire circumference of the pipe until the detector signal activates
indicating the exact location of the coating flaw.
COATED PIPE
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