• Series of measuring bodies for piezocones
  • Electronics workshop
  • Electronics engineer at work
  • Strain gauges of piezocone
  • Strain gauge of piezocone
Gouda Geo-Equipment B.V.
Satellietbaan 8
2181 MH Hillegom
The Netherlands

Calibration of Measuring Instruments

All CPT measuring equipment, such as electrical CPT cones, measuring heads, data acquisition systems, and alike needs to be calibrated once in a while (see relevant standards). It helps customers achieve the highest measurement quality and productivity.

Calibration refers to the process of determining the relation between the output (or response) of a measuring instrument and the value of the input quantity or attribute, a measurement standard.

In non-specialized use, calibration is often regarded as including the process of adjusting the output or indication on a measurement instrument to agree with value of the applied standard, within a specified accuracy.

For a calibration to be of any value it must be accompanied by a traceable uncertainty statement (certificate) to an stated confidence level.

Gouda-Geo uses calibration data derived from one or more of the following sources: the Nederlands Meetinstituut (NMI) or other national laboratory (like NIST), a natural physical constant, or a ratio technique. The calibration reference data are on file at the NMI.

All calibrations are compliant with Gouda Geo-Equipment's internal quality system, internal calibration procedures and meet the requirements of standards NEN2649, NEN3680 and/or NEN5140.

The calibration interval may vary from customer use and different conditions. All calibrations are verified at a moment in time; and confirmed within controlled temperature and humidity specified standards. Please note, that improper use of the apparatus (e.g. dropping) may cause loss of calibration.

The calibration of a CPT measuring instruments normally takes 1 day. When a measuring instrument is to be repaired, it has to be recalibrated as well.

Gouda-Geo provides calibration service for the following measuring instruments:

Please consult the down-loadable document (see right column) for recommended maximum calibration intervals.
NOTE: Also measuring instruments manufactured by other companies can be calibrated by Gouda-Geo.

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