Low Voltage Holiday Detector

A low voltage wet sponge tester may be used without damaging the coating but can produce erroneous readings.

Low voltage holiday detector. To prevent damage to a coating if a high voltage spark tester is being used the total film thickness and dielectric strength of the coating system shall be considered in selecting the appropriate voltage for detection of discontinuities. There are two types of pinhole detectors low voltage wet sponge and high voltage spark tester. The elcometer 236 holiday tester provides the user with complete control of voltage and sensitivity settings and is available in 2 versions 15kv and 30kv.

Moisture from the sponge electrodes conducts a low inspection voltage 67 volts to the coating of each coated rebar which allows the msrb plc system to detect any holiday defect in the rebar coating. The lcd screen of the voltmeter measures and displays the output voltage of the holiday detector. The m 1 now uses a 9v battery which can be replaced without opening the instrument case.

4 3 the low voltage wet sponge test equipment is generally used for determining the existence of discontinuities in coating films having a total thickness of 0 5 mm 20 mil or less. Holiday detector low voltage wet sponge type is a non destructive test instrument that uses 5 to 90 volts direct current dc to find minute bare spots and other discontinuities collectively known as holidays in thin non conductive coatings painted over conductive substrates. Other names include porosity detector continuity tester sponge tester and holiday detector.

A pinhole detector is a non destructive instrument for detecting discontinuities in a coating system including pinholes cracks and thin spots. Continuous dc holiday detectors such as the elcometer 236 holiday detector require direct connection to the conductive substrate. Unit output voltage is 67 5 volts dc.

M 1 low voltage holiday detector. The new spy model 670 operates on a single 9 volt alkaline battery. The holiday detector is lightweight and overall weight with handle is approx 3 6 kg the test voltage is of low power and does not damage or cause burn marks on the coating when the using holiday detector there are a number of important safety features built in the test voltage is high impedance and drops to zero when a fault is detected earth cable is lockable to prevent accidental disconnection.

Using pulsed dc holiday detection technology the elcometer 280 pulsed dc holiday detector is designed to ensure that the energy is contained within very short pulses each pulse. This display gives the user the ability to tune the aps to a specific voltage with in increment in 100v steps.