The PosiTest HHD is a Pulse Type DC Holiday Detector /Porosity Tester with a user-adjustable voltage range from 0.5 to 35kV for detecting holidays, pinholes and other discontinuities and to inspect non-conductive coatings thicker than 500 µm.
The PosiTest HHD has extensive electrode options and accessories making this high voltage Porosity Tester suitable for a large range of substrates with different coating thicknesses and applications. Typical applications include porosity tests performed on tank interiors, chemical storage, pipelines, vessels and other protective coatings. Furthermore, given that concrete is a slightly conductive substrate, it carries enough current to allow holiday detectors to function. Hence the PosiTest HHD can also be deployed on concrete for continuity testing and holiday detection.
The electrodes of the PosiTest HHD can either be connected directly or by extension (with optional stick accessories). A stick-type porosity tester is a stand-alone tester with internal battery power and electrodes are attached to the end of an extension stick. The rod or belt detectors usually have a separate battery on the belt or shoulder strap and electrodes attached to a hand stick. With the optional hand rod accessories, the PosiTest HHD can be converted into a rod instrument that is suitable for voltages below 15kV.
The PosiTest HHD has two major operating modes, the Standby Mode and the Detection Mode. when in Standby Mode, the detector does not generate a high voltage and when in Detection Mode a high voltage is generated. In this mode analysing electrode voltage and current help to assess if discontinuities (holidays) exist.
The PosiTest HHD is lightweight, has an ergonomic design for comfortable all-day use and comes with a warranty of 2 years.
PosiTest HHD is supplied as a complete kit including:
|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:||500 Volt - 35.000 Volts / 0.5 – 35 kV|
|Pulse Duration:||10 µs|
|Battery:||Rechargeable Smart 72Wh Li-ion battery|
|Battery duration:||Rechargeable Smart 72Wh Li-ion battery|
|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)|
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.