POSITEST HHD High voltage porosity detector (holiday detector)
The PosiTest HHD by Checkline Europe is a Pulse Type DC Holiday Detector / Porosity Tester designed to to detect unacceptable discontinuities such as pinholes and voids in coatings and films using pulse DC.
A holiday test is also known as a continuity test.
It can be used for porosity tests performed on tank interiors, chemical storage, pipelines, vessels and other protective coatings. It also can measure coating thickness on concrete, concrete is not considered a 'conductive' substrate, as it is much less conductive than metal. However, concrete is still slightly conductive, and can carry enough current to allow holiday detectors to function. Therefore, for the purposes of holiday detection, concrete is considered a 'conductive' substrate.
With a wide range of probes and accessories available, high voltage holiday test can be carried out on a variety of substrates with a different coating thickness and is suitable for all applications.
A High voltage up to 35,000V (35kV) can used to inspect non-conductive coatings thicker than 500 µm.
Discontinuities can be detected when the charged electrode is passed over the coated surface. When a discontinuitie is encountered, current flows from the electrode into the substrate. The current returns to the detector through the ground (earth) wire, completing the circuit and triggering audible and visible alarms. An integrated peak reading voltmeter measures and displays the output voltage on the display while in use.
The PosiTest HHD can be used in either a stick-type or wand-type configuration (when used with the optional wand accessory).
A stick-type holiday detector is a standalone detector with internal battery power and electrodes that attach to the end of an extension rod (stick). The Wand' or 'Belt-style' detectors typically have a separate battery pack carried on the belt or shoulder strap and electrodes that attach to a handheld wand. The PosiTest HHD is the first combination stick type/wand type instrument on the market. With the optional handheld wand accessory, the PosiTest HHD converts into a wand style instrument suitable for voltages less than 15kV.
The PosiTest HHD has two primary operating modes:
1.Standby Mode: The detector is powered-up but not generating a high voltage.
2.Detection Mode: The detector is generating a high voltage and analyzing electrode voltage and current to determine if holidays are present.
A wide range of accessories are available,so the high voltage holiday test / Porosity Testing can be carried out on a variety of substrates with a different coating thickness and is suitable for all applications.
- Conforms to ASTM D4787/D5162/G62, ISO 29601, NACE SP0188/SP0274/SP0490, AS3894.1
- Includes NIST Traceable Long Form Calibration Certificate
- 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
- Industry-standard connectors and adaptors for compatibility with nearly all existing electrodes
- Rugged, environmentally sealed ABS plastic enclosure is weatherproof, dustproof and shockproof
- Shock proof/creep proof — internally sealed to minimize creep distance to high voltage components.
- Voltage calculator feature — choose one of 11 international standards, and input the coating thickness to automatically calculate the required test voltage
- Lightweight, ergonomic design provides comfortable all-day use, reducing operator fatigue
- Removable Smart lithium-ion battery provides power for up to 40 hours of continuous measurement
- Built-in certified voltmeter (crest meter, jeep meter) displays and regulates the voltage at the electrode
PosiTest HHD is supplied as a complete kit including:
- 7.6 mtr. ground (earth) cable with ground clip
- Li-ion battery pack with built-in charge state indicator
- Smart charger with universal AC voltage input
- Stainless steel fan brush - HHDFANBRUSH - 5cm
- 50 cm (20" ) extension rod with thumb screw
- Shoulder strap
- Long Form Certificate of Calibration traceable to NIST
- Instruction Manual
- Durable Pelican Storm case
| Coating Thickness Range* | up to 20 mm - *Based on NACESP0274-2011 recommendations |
| Pulse Repetition Rate | 30 Hz |
| Output Voltage Range | 500 Volt - 35.000 Volts / 0.5 – 35 kV |
| Output Voltage Adjustment | 0.5 kV – 1 kV: 10 Volt Steps / 1 kV – 35 kV: 100 Volt Steps |
| Output Accuracy | +/-5% |
| Pulse Duration | 10 µs |
| Battery | Rechargeable Smart 72Wh Li-ion battery |
| Typical Battery Life | Based on selected voltage and load: Ø 12” Rolling Spring @ 10kV, 40 hrs. / Ø 40” Rolling Spring @ 10kV, 30 hrs. |
| Charge Time | 3 hours |
| Operating Temperature | -20° to 60°C |
| Unit Size | 64 cm x 6.4 cm x 13 cm |
| Unit weight | 1,8 kg with battery (without electrodes) |
| Warranty | 2 years |
Please Note: Each spring includes two pre-installed spring couplers. A spring connector (HHDCONNECT) is required to attach the PosiTest HHD to the spring couplers. Custom sizes and bulk pricing available. Additional couplers (HHDCOUPLER - 2 pack) are available.
Availability: Available: 1 - 3 days, Delivery time: 1 - 3 weeks, special order request