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sales@ndtone.comCorona 5Holiday Detector
Corona 5Holiday Detector
The Corona 5 is a portable pulsed holiday detector for non-destructive testing of thin protective dielectric coatings. It detects pinholes, pores, cracks, leaks and other coating discontinuities using an adjustable test voltage and is suitable for coatings from 50 µm to 1 mm thick.
Description
The Corona 5 is a compact portable holiday detector designed for non-destructive testing of thin dielectric coatings on electrically conductive substrates. It detects pinholes, pores, cracks, leaks and other discontinuities that can compromise the protective properties of a coating.
With an adjustable test voltage of 0.7–5 kV, the device is intended for coatings from 50 µm to 1 mm thick. A range of interchangeable electrodes makes it suitable for inspection of pipelines, tanks, vessels, metal structures and other coated components, including flat, cylindrical and difficult-to-access surfaces.
The Corona 5 is particularly suitable for quality control of thin anticorrosion and protective coatings during manufacturing, application and maintenance.
Features
- Inspection of thin dielectric coatings from 50 µm to 1 mm
- Adjustable test voltage from 0.7 to 5 kV
- High stability of test voltage — within 5%
- Powerful test-voltage generator up to 50 W
- False-defect detection system
- Built-in test-voltage calculator based on coating thickness
- User calibration throughout the device lifetime
- Built-in defect counter
- Wide operating temperature range from –40 to +50 °C
- Lightweight control unit — up to 650 g
- Up to 20 hours of autonomous operation
- Wide selection of interchangeable electrodes for flat, cylindrical and complex surfaces
Basic technical characteristics
| Technical data | Corona 5 | Units |
|---|---|---|
| Minimum thickness of tested coatings | 50 | µm |
| Maximum thickness of tested coatings, at least | 1 | mm |
| Type of holiday detector | Pulsed | |
| Test voltage range | From 0.7 to 5 | kV |
| Pulse frequency | 250 | Hz |
| Weight of the control unit, maximum | 650 | g |
| power supply | removable 12 V 2200 mAh lead-acid battery, 220 V network (via power adapter) | |
Delivery set
- control unit Corona 5
- case for control unit
- high-voltage handle VT-5
- ground wire with magnet and crocodile clip
- extension rod
- lead-acid battery
- fan electrode
- battery charger
- operating manual
Electrodes
Special electrodes can be made according to customer’s own specification.
Video materials
Corona Holiday Detectors
tector
A brush (fan) electrode for holiday detectors
An extension rod for holiday detectors
A brush (hair) electrode for holiday detectors
A straight silicone rubber electrode for holiday detectors
Holiday testing using a rolling spring electrode
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