Calibration of measuring instruments with variable dimensions

Proposed calibration services

• Calibration of external micrometers:

Determination of the error of indication full touch in 6 points and the error of indication in partial contact up to 300 mm. According to NF E 11-095 standard .
Calibration of pins and extensions possible
Measuring range : 10-2 000 mm

• Calibration of internal measurement devices:

Examples: internal micrometer fitted with a spout, alesometer, subito tester, quick feeler.
Determination of the indication error.
Carried out in accordance with Standards NF E 11-090 - NF E 11-099.
Measurement range and uncertainty dependent on the type of instrument.

• Calibration of calipers:

Determination of the full contact indication error and limited surface indication error.
Carried out in accordance with Standard NF E 11-091.
Measurement range: 10-2,000 mm.

• Calibration of displacement sensors and wired sensors:

Determination of the indication error by means of interferometric comparison.
Carried out in accordance with Standard NF E 11-068.

• Calibration of measurement columns:

Determination of the accuracy error on the vertical axis in comparison with a laser interferometer.
Determination of the perpendicularity offset.
Optimal uncertainty: 0.2 µm + 2.5.10^-6.L.

• Calibration of micrometric thrust bearings:

Determination of the indication error by means of mechanical or interferometric comparison.
Measurement range: 10-100 mm.

• Calibration of depth gauges:

Determination of the indication error.
Carried out in accordance with Standards NF E 11-096 and NF E 11-097
Measurement range: 10-2,000 mm.

• Calibration of 2-button micrometric gauges:

Determination of the indication error. Carried out in accordance with Standard XP E 11-098.
Measurement range: 10-400 mm or > 400 mm (Unimaster).

• Calibration of surface gauges:

Determination of the indication error on metrological marble specimens fitted with standard blocks.

NEW :

LNE is the only laboratory in France with FLEX3 flexible range accreditation for all types of electrical displacement transducers. This means you can benefit from Cofrac* accredited calibration for

- Your measurement chains related to specific measurement benches, whatever the type of displacement transducer (optoelectronic transducers, wire transducers, capacitive transducers, LVDT and potentiometric transducers...)

- Your sensors, often associated with electronic systems that cannot be disassembled in their entirety, and which require calibration on their current output (4-20mA), voltage (0-10V...) or on their output in length unit (mm, µm...).

Thus, you benefit from an optimal uncertainty of measurement, and answer a requirement more and more widespread within the laboratories of tests, themselves accredited.

These calibrations allow you to go much further in processing the values, with LNE providing a linearization polynomial of order 1, 2 or 3 or more in order to convert the sensor's electrical output signal into micrometers of displacement with the lowest possible error residuals.

Means and equipment 

LNE has several reference calibration benches in a perfectly controlled climatic environment with very high stability, enabling it to obtain a very wide range of calibration measurements:              

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• A 4000 mm GISP bench with an in-line laser interferometer 
• A 300 mm GISP bench with an in-line interferometer 
  

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Accreditation 

• COFRAC Accreditation No. 2-1446 (please contact us)

List of sites and scopes available on www.cofrac.fr