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0 reviews | Model: Tinker & Rasor M1/AC
Low Voltage Holiday Detector, Ac Powered (Wet Sponge Type)
Your Price: $1,225.00
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The Model M1/AC Holiday Detector is a highly sensitive device designed to locate holidays (pin holes, voids, etc.) in thin film protective coating of relatively high electrical resistance when such films are applied to the surface of material of low electrical resistance. In these applications, such as painted metal surfaces, the Model M1/AC Holiday Detector will locate these points very accurately with an audible signal. This method of inspection of thin film is a non-destructive test and will not injure the protective coating. The electrical components are housed in a thermo plastic resin case with closing lid for maximum protection and the detector is equipped with on-off switch, LED light, wand terminal, ground terminal, fuse receptacle, 110v AC cord. (For use with 240v AC, an appropriate cord will need to be sourced locally). The detector operates from 110/240 volt 50/60 cycle AC line current and the electrical design of the M1/AC Holiday Detector utilizes a sensitive relay which is activated by a voltage regulated, solid state power supply.
Model M1/AC shown with connection on side of case. AC connection and external alarm connection on back of instrument case. External alarm can be used for audible or visual holiday indicator.
New Sponge and Wand materials - Thick sponge material, Very strong, lightweight Wand.
The detector is a "non-destructive wet sponge" type holiday detector. The basic electronic design of the Model M1/AC Holiday Detector is that of a very sensitive circuit which is energized by AC power. When current of 500 or 700 (+/- 10/%) micro-amperes flows in the circuit, an audible signal is actuated. The exploring electrode is open-cell sponge material and is conductive when saturated with a wetting solution. The sponge electrode is attached to the non-conductive wand handle by means of the bolt with knob, plastic sponge holder and backing plate.
The protective coatings should be dry and free of all contamination prior to electrical holiday testing. Proper curing and drying time of the protective coating must be established prior to conducting electrical holiday testing. The dry film thickness should not exceed 20 mils when electrical holiday testing is done with the low voltage Model M1/AC Holiday Detector. Film thickness should be determined with a nondestructive dry film thickness gauge to make sure limits are not exceeded. Special Note: Ordinary tap water will generally suffice to dampen the sponge electrode, provided the protective coating thickness does not exceed 10 mils. The factory recommended practice is to use a wetting agent at all times, regardless of coating thickness to 20 mils.
Factory calibration on Model M1/AC Holiday Detectors is set at 700 micro-amperes (+/- 10%) of current flow to complete the circuit for the audible signal to indicate a coating holiday on metal substrates. For coatings on concrete substrates, the Model M1/AC must be adjusted for current flow of 500 micro-amperes (+/- 10%).
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