SPY 790 - SPY Model 785;790 Pulse DC Holiday Detector Overview

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spy
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model 785 / 790 pulse dc
h o l i day detector overview
The Model 785 Pulse DC Holiday Detector is a high voltage (1-15
kV) detector designed to cover a wide range of coatings from thin
films to tapes to extruded or coal tar types of coatings (4 -150 Mils).
Since the operating characteristics of this detector are very broad it
is recommended that thin film epoxy coatings be inspected with the
model 780 or 785 holiday detector.
The Model 790 Pulse DC Holiday Detector is a high voltage (5-35 kV)
detector designed specifically for tapes, extruded or coal tar types of
coatings, and thicker somatic type coatings (50 -750 Mils).
The Model 785 / 790 Pulse DC Holiday Detectors incorporates circuitry
allowing the detectors to maintain a selected voltage, regardless of
different pipe diameters, coating thickness variations and battery wear
(unless the battery is totally discharged). Keep in mind that the voltage
can decrease slightly depending on ground losses and/or conditions.