PHONICS Scan

PHONICS Scan

6.00 Per Square Foot

PHONICS scan as the name suggest, helps the user to do the Quality Assurance and Troubleshooting of applied coatings, liners and membrane principally by use of “AUDIBLE” alarm technology.

It’s a low voltage, non-­‐destructive testing technology which takes minimum set up and helps user to identify breaches as small as pin-­‐hole with electric accuracy. Once you use the ‘Audible’ alarm to locate breaches, you are amazed with its simplicity and wonder your judgment over the years to use alternate methods to do quality assurance especially over vertical and sloped surfaces !

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SCAN LOGIC

  • Waterproofing membrane (baring few exceptions) act like an isolator of electricity.
  • First step is to ensure that waterproofing layer is installed directly on a ‘conductivesubstrate. Inverted deck, Concrete RCC slab etc. are inherently conductive and needs no special caution.
  • It is designed to detect discontinuities/ pinholes in a dielectric coatings coating, liner and membrane by utilizing a simple fundamentals of checking ‘Resistance’ of the tested layer.
  • Whenever the testing probe (sponge) is passed over a “Pin-­‐hole” or a point of resistance that is equal or lower than the sensitivity threshold set to relate the surface as ‘Leak-­‐proof’, an audible buzzer and red light indicator helps the user to identify breaches in waterproofing / coating layer with current accuracy!
  • Just by following the direction of the audible alarm and red light indicator, technician is able to precisely locate a ‘leak’ and ensure that there are no pin-­‐holes left on the applied waterproofing layer!

It is especially ideal for ‘Exposed’ coatings, liners, waterproofing layers applied over ‘Vertical’ & ‘Curved’ surfaces. It can also come handy while testing large ‘exposed’ horizontal areas which are coated with dielectric layer (waterproofing / coating).

Specification

  • PHONICS Scan basically picks up from where CENTRIC Vector Scan leaves out. Ideal for surfaces like terminations, junctions, VERTICAL surfaces etc.

    Before performing an inspection, ensure that the coated surface is fully cured, dry and free of contaminates.PHONICS Scan is ideal for waterproofing coating thickness of less than 500 μm (20 mils). If testing a coating thicker than 250 μm (10 mils), adding a wetting agent or other low-sudsing surfactant to the water will reduce the surface tension of the water and promote flow into discontinuities.

    1. Use clean tap water to wet the test sponge. Squeeze excess water from the sponge until it no longer drips.

    2. Connect the ground (earth) wire clip to an uncoated point of the part to be tested. Plug the ground wire into the ground wire jack on the PHONICS Scanner.

    3. Check correct operation and alarm status by touching the sponge to the ground clamp or another uncoated point on the part. This should complete the electrical circuit and trigger the LED and audio alarms. If no alarm is noted, check all connections, wires, battery life indicator and sponge wetness.

    4. Move the sponge over the coated surface at a maximum rate of 0.3 m/s (1 ft/s) and apply sufficient pressure to maintain a wet surface. If the sponge contacts a pinhole in the coating, all display LEDs will illuminate and an alarm tone will sound. Alarm will stop when the sponge is moved away from the pinhole.

    5. Precisely locate the pinhole by using a corner of the sponge.

    6. Such water electronic testing may be conducted on an area by area basis as the Work permits but in no case shall less than 100% of the roof membrane be tested. If leaks occur, remove existing components and replace with the new material to eliminate the causes and sources of the leaks. 

    7. Record each day’s test result with a written description and photograph of defects and corrections made and a schematic CAD drawing indicating location of stationary conductor wire and of defects found in testing to within 50mm of accuracy.

Terms

  1. The client will remain responsible for all non-refundable travel expenses including lodging & boarding incurred if, for any reason, the scheduled testing date is changed or cancelled by the client.
  2. On the day of the scheduled Electric CENTRIC Vector Mapping Scan, the client is to provide:
      1. Water access with proper water pressure (One Tap point on each floor where testing is requested)
      2. A 110 volt power supply that is capable of delivering a three-pronged grounded service within 100 m of testing location. (One tap point on each floor where testing is requested)
      3. Safe access to all test areas, prior to the technician arriving to the site. This includes all ladders and access forms being in a safe and working condition, at the correct height if the technician has to use ladder access, and all ladders must be properly tied off and secured prior to and during the technician’s arrival.
      4. Drains within the test area must be cut-out, free-flowing, and the tie-down pipes are properly connected.
      5. Test area is to be cleared of materials, debris and construction wastes to allow for safe access and un-obstructive testing.
      6. To facilitate future testing of a roof, the exposed metal projections (i.e., anchors, metal stacks) must be wrapped with membrane or membrane materials compatible with the membrane to stop the flow of electricity through the overburden and making a connection to the metal.

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Electric CENTRIC Vector Mapping helps the user to do the Quality Assurance and Troubleshooting of applied waterproofing membranes and coatings by following the principal of Vector Mapping. The testing procedure has been described as Electric Field Vector Mapping (EFVM) under ASTM D7877 : Standard Guide for Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes.

It’s a low voltage, non-­‐destructive testing technology which takes minimum set up and helps user to identify breaches as small as pin-­‐hole with electric accuracy. It makes ‘Flood Testing’ look barbaric and outdated way of doing QA.