Description
What is High Voltage Holiday Detector?
High voltage holiday detector as their name implies, operate using higher voltages than their low-voltage counterparts. This higher voltage allows them to detect holidays in thicker coatings (greater than 500 microns).
A holiday test is an inspection method used to detect discontinuities in painted or coated surfaces using specialized tools and equipment. These tools, called holiday detectors, are portable devices that are swept across the coated surface.
Holidays tests work on the concept of electrical conductivity. Metal substrates are excellent conductors of electricity, and therefore allow current to flow through them. On the other hand, many coatings are poor conductors of electricity and resist the flow of electricity. Using this principle, holiday tests use instruments to locate flaws in anticorrosive paints and coatings.
During holiday testing, a ground wire and probing electrode are attached to the same power source. The ground wire is clamped to the specimen being tested while the probe is swept across the surface of the metal substrate. If the probe comes into contact with a coating discontinuity, the exposed metal completes the electrical circuit between the electrode and the grounding wire, resulting in a flow of electricity. This electricity shows up on an indicator and also alerting the equipment operator of the defect.
While holiday tests are effective, they do possess limitations. Because these tests depend on the coating being non-conductive, they are not effective on conductive metallic coatings, such as zinc-rich primers.
Our High Voltage Holiday Detector products as follow :
TQC High Voltage Holiday Detector or porosity test provides accurate detection of pinholes, flaws, inclusions, thin spots and also bubbles in a coating.
The gauge has been specifically designed to revolutionize high voltage DC testing of coatings, making it safer, easier and more reliable than previously possible.
The high voltage technique is identically to test porosity coatings thickness up to 36 mm thick. This Instrument is ideal for inspecting paint on pipelines, tank bottoms and other protective coatings, also for coatings on concrete.
Furthermore the instrument has a lot of uniquely features. A current limiting not only to avoid coating damage, but also a safety hand grip without sensitive electronics. The extended ribbing on the handle would provides an effective barrier between the high voltage and the user. The accurate sensitivity adjustment allows use on metallized or slightly damp coatings.
These is used to ensure the longevity of coating systems by locating pin holes, air bubbles, and also porosity in non-conductive coatings on conductive substrates, including concrete.
TQC High Voltage Holiday Detector Complies with the requirements Standard of
AS3894.1-2002 (R2013) and also Nace Standards: SP0490-2007; SP0274-2011 & SP0188-2006
Applications
- Used for detection of coating porosity (pin-holes, whether holidays) in dielectric (insulation type) coatings on conductive substrates, and also on concrete.
- Suitable for Production Pipeline coating operations, Tank-work and also Structures. Comparatively ideal for use on storage tanks, valves and pipelines etc
- Come with housed in a fully portable ABS case, and also Detectors deliver stabilized DC output of up to 30kV. Constant current source maintains applied test voltage. Full test current at low voltages (where it is needed most) when testing at low film builds (eg 150µm, as per AS3894.1-2002)
- Incorporating momentary-on and also continuous-on switches (mounted on the front panel), allowing the units to be switched on momentarily for safety, or to run continuously
- No necessaries to swap probes to change voltage, because the detectors have clip-on battery packs which must be separately charged. Fully recharged in 4 hours and the regulated DC output fully adjustable either. Applied voltage and battery condition also continuously shown on the Liquid Crystal Display.
Features
- Lightweight with ABS case
- Momentary on switch allows for auto shut-off
- Digital display of applied voltage with integral battery condition indicator
- Regulated DC voltage
- Voltage ranges of 0-15kV or 0-30kV (depending on the model), fully adjustable
- Clip-on battery pack
- Constant test current
- Sensitivity control
- Overcharge protection
- Single power supply
- Earphones for noisy environments
Complete with select-able kits:
Industrial Kit :
- Detector with clip-on power pack
- Universal Charger
- Probe handle with neon and also 2m lead
- 60mm connector for flat brushes
- 7m earth lead with clamp
- Fan brush and also 250mm flat brass wire brush
- 450mm probe extension
- Air-operated earphones
- Shoulder & waist harness with Kit case
- Operating instructions with calibration certificate
- Battery Clip
Pipeline Kit :
- Detector with clip-on power pack
- Spare clip-on power pack
- Universal Charger
- Probe handle with neon and also 2m lead
- 60mm connector for flat brushes
- 7m earth lead with clamp
- Fan brush
- Coil joiner also with 450mm connector
- Air-operated earphones
- Shoulder and also waist harness
- Kit case
- Operating instructions and also come with calibration certificate
- Battery Clip
Positest HHD Kit ( HIGH VOLTAGE HOLIDAY DETECTOR).
Detects holidays, porosity, pinholes, leaks, and other discontinuities in coatings, linings, and membranes using pulse or continuous DC.
- Available as a stick-type with pulsed DC or a compact wand style with continuous DC.
- Lightweight, ergonomic design provides comfortable all-day use, reducing operator fatigue.
- Regulated pulse or continuous DC voltage output that won’t change under load— ±5% voltage accuracy.
- Voltage calculator feature—input the coating thickness to automatically calculate the required test voltage.
- Extensive electrode options—choose from a wide range of rolling spring and flat wire brush electrodes or use electrodes from other manufacturers with optional adaptors—custom sizes available upon request.
- Long Form Certificate of Calibration included with each instrument.
Holiday Detector PosiTest HHD Kit is Holiday detector high-voltage instrument that uses high voltage (greater than 800 volts) electricity to discover discontinuities in thicker non-conducting or insulating film (between 500 microns (20 mils) and 25mm (1″) thick) that is applied over conductive substrates. Insulators include some paints, varnishes and other coatings that are poor electrical conductors.
The voltage is use to determined by the coating’s type and thickness. A high-voltage holiday detector can be destructive because the high voltage pulses used to detect holidays can burn or destroy some of the thinly coated areas.
High Voltage Holiday Detector is also known as a spark tester because of the spark it gives off whenever a holiday or coating discontinuity is found.
High Voltage Holiday detector, is an instrument used to check for discontinuities in coatings thicker than 500 microns (20 mils). It typically consists of a power source, a ground wire, a probing electrode and also an indicator. The indicator is a light or sound that is triggered when a holiday is detected.
THERE ARE TWO TYPES OF HIGH VOLTAGE HOLIDAY DETECTORS AVAILABLE.
The pulsating direct current or the continuous direct current. The pulsating direct current holiday detector is the most commonly used type.
A pulsed direct current holiday detector discharges an adjustable and regulated ‘pulsed’ or “cycling type” of high voltage. It is suitable for use in dirty, damp, contaminated or slightly conductive coating surfaces.
A continuous direct current holiday detector discharges high voltage continuously and is suitable for holiday testing non-conductive coatings on pipelines, storage tanks and also valves.
Holiday Detector POSITEST HHD FEATURES
Simple
- Easy-to-use with bright, multicolor LCD
- Ready to measure — comes with everything needed for testing
- Audibly and visibly alerts when flaws/holidays already detect
- Lightweight, ergonomic design provides comfortable all-day use, reducing fatigue
- Voltage calculator feature — choose one of 11 international standards, and input the coating thickness to automatically calculate the required test voltage
Versatile
- A wide range of rolling spring electrodes and wire brushes are available. Custom sizes available upon request.
- Optional handheld wand accessory coverts the detector into a wand configuration ideal for testing hard-to-reach areas (suitable for voltages < 15 kV)
- Industry-standard connectors and adaptors for compatibility with nearly all existing electrodes
- User adjustable voltage range from 0.5 until 35 kV
Durable
- Rugged, environmentally sealed ABS plastic enclosure.
- Weatherproof, dustproof and shockproof
- Included Pelican Storm case with custom foam inserts for superior protection
- A year warranty
Powerful
- Strobe light and loud audible alarms emitted when a holiday is detected. Audio alarm mode can be adjustable for differing environments.
- Removable Smart lithium-ion battery provides power for up to 40 hours of continuous measurement
Safe
- Press and hold Safety Trigger helps prevent accidental high voltage generation
- 7.6 m (25′) ground (earth) cable with locking connector and spring clamp
- Shock proof/creep proof — internally sealed to minimize creep distance to high voltage components. Designed in accordance with IEC 61010-1.
Accurate
- Built-in certified voltmeter (crest meter, Jeep meter) displays and regulates the voltage at the electrode
- Long Form Certificate of Calibration included with each instrument
- Conforms to national and also international standards included ISO, ASTM and NACE
High Voltage Holiday Detector Specifications
PosiTest High Voltage Holiday Detetcor Pulsed DC
The PosiTest HHD Pulsed DC is available in two kit configurations.
The First is PosiTest HHD Kit ; features a longer electrode rod, increased battery capacity, Pelican Storm case, and also shoulder strap.
The Second is PosiTest HHD Basic Kit features a shorter electrode rod, lower battery capacity, and also a durable hard shell case.
Positest HHD C Compact Wand Style.
Detects holidays using continuous DC PosiTest HHD C Kit
Includes ALL features shown above plus…
- Lightweight, one-piece ergonomic design provides comfortable all-day use and also reducing operator fatigue
- No shoulder bag required! All electronics, batteries, and connectors are integration into a single handheld wand
- User adjustable voltage range from 0.5 — 30 kV
- Powerful Li-ion batteries fit neatly within the compact wand handle eliminating the need for a separate battery box—reducing weight and operator fatigue
- 43 cm (17″) extension rod available for detection on floors and hard-to-reach areas
Accessories Rolling & wire brush electrode available of sizes.
PosiTest High Voltage holiday detector Video
Should you require any further information, related products or quotation please do contact us.
