MU-A-RectiRail DL2-rev01a-Gb 4 / 44
1 GENERAL CHARACTERISTICS
The RectiRail DL2 rule is designed to measure the longitudinal profile of a rail over a
length of 1 metre, to an accuracy of +/-50 microns.
RectiRail DL2 consists of 100 position sensors secured to a reference rail. The rule
bears on the part to be inspected, by means of two pads placed at each end of the rule.
During the measurement, the electronic circuit reads the output voltage of each sensor
and converts it into a position measurement. The calculated curve is then transferred via
Bluetooth connection to a PDA, and displayed on its screen.
The measurement is of the capacitive type (contactless). This highly effective
technology, accurate, linear and quick, requires the materials for which distance is to be
measured from the sensor, to be sufficiently conductive: metals, carbon fibre
composites, rubber composites, etc.
RectiRail DL2 operates on oxidised metals and some paints, when at least one of the
two steel pads ensures good electric contact with the part to be measured.
It also comprises the following parts:
■ Side stops with indexing
■ Holding magnets on the part to be measured
■ Browsing in the software using 1 joystick, 2 buttons and a touch screen
■ Power supply by a battery consisting of 6 rechargeable accumulators
(supplied with a charger)
Very important:
- By principle, the capacitive sensor gives a mean measurement on a surface.
- Measurement accuracy is guaranteed only for a disk with a 12 mm diameter
opposite the sensor.
- For measurements on parts narrower than a rail, e.g. 10 mm wide, perfect side
centring of the rule must be ensured on the part to be inspected, and calibration
carried out on a reference.
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