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Portable calibration unit (PCU)
Battery-powered portable calibration device for field verification of Lismar ET Tester eddy current inspection systems.
Overview
LISMAR’s Portable Calibration Unit (PCU) is a small device used to calibrate our ET Tester. The PCU is mounted on the sensor head of the ET Tester after which the calibration can be performed. The PCU can be used for our DATAMES systems, not LRI.
The PCU has a roll of 50 mm in diameter, with an accurately machined slot parallel to the roll axis; this simulated spall/crack is 0.020 mm wide and 1 mm deep. A motor turns the roll at a preset speed, resulting in a calibration speed of 127 cm/sec on the roll surface. This surface, or tip speed, is the normal ET Tester inspection roll surface speed.
The PCU motor is powered by a battery pack, making the unit completely portable and self-contained. The low voltage power supply ensures a safe calibration procedure on the work floor. The battery pack will have to be recharged occasionally.
The PCU slides over the sensor head of the ET Tester and is held in place by two screws. The gap distance (the distance between the roll surface and eddy current sensor) can be adjusted by turning the screws.
Key Features
Technical Specifications
| Roll Diameter | 50 mm |
| Simulated Defect Width | 0.020 mm |
| Defect Depth | 1 mm |
| Defect Type | Machined slot parallel to roll axis |
| Calibration Speed | 127 cm/sec (roll surface tip speed) |
| Power Source | Battery pack (rechargeable) |
| Voltage | Low voltage (safe for work floor use) |
| Mounting | Two screws onto ET Tester sensor head |
| Gap Adjustment | Manual (via screw adjustment) |
Frequently Asked Questions
The Portable Calibration Unit (PCU) from Ascential Test & Measurement is a small, battery-powered portable device used to calibrate ET Tester eddy current inspection systems in the field. It can be used with DATAMES systems.
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