KSW Kalibrierservice GmbH

"Calibrating measuring instruments - Questions and answers"

DAkkS-accredited calibration laboratory KSW Kalibrierservice GmbH

In-depth knowledge of factory calibrations & ISO calibrations

We want to help you, as a producer and service provider to achieve a high level of quality in the interests of your customers. As part of our information series “Did you know …? We have compiled and broken-down important terms relating to the subject “calibration”. If you have any questions or suggestions, we look forward to hearing from you.

What does mean a calibration?

Factory calibration / in-house calibration (ISO calibration): According to document DAkkS-DKD-4 “Traceability of measuring and test equipment to national standards” 1. New edition 2010.

“Pt. 6.4.2 The type and scope of the metrological control for an in-house calibration is left to the concerned company. They must be adapted to the particular application so that the results obtained with the measuring and testing equipment are sufficiently accurate and reliable. An accreditation of the organization that carries out in-house calibrations is not required to meet the requirements of the EN ISO 9000 series of standards applied to in-house issues. However, if an external body uses an in-house calibration certificate as proof of traceability, it should be required that the issuing organization can prove its competence. “

Unless expressly agreed otherwise, the fulfillment of the after Point 6.4.2 is our standard offer.

What does DAkkS-accredited calibration laboratory mean?

The calibration by a DAkkS-accredited calibration laboratory is proof of the metrological traceability.

This is required for: testing and calibration laboratories, medical laboratories, inspection bodies, manufacturers of reference materials and, if applicable, providers of proficiency tests and bodies that deal product certification systems. The requirements for calibration certificates are specified for a DAkkS-accredited calibration laboratory in the document DAkkS-DKD-5.

This type of calibration is only possible for our scope of accreditation and must be expressly agreed.

What is meant by the term "graduation"?

The graduation of a measuring device is carried out by the responsible calibration office. It is checked whether the device complies with the respective calibration regulations and whether the measurement deviation does not exceed the error limits. When the device has been graduated, this is officially confirmed by a stamp on the device. The system serves consumer protection and is a guarantee that consumers can rely on the measurement results of a particular device.

When do adjustments have to be made?

In contrast to calibration, adjustment always requires intervention in the device, which causes a permanent change. This is necessary if the device has to be readjusted or calibrated.

How often do you have to calibrate?

Please follow the manufacturer’s recommendations!

With ISO calibrations (factory calibrations) and DAkkS calibrations, the actual status of the measuring device is determined at the time of calibration. From the calibration decision you can deduce whether you have measured correctly in the past or whether you need to take retroactive actions. You are responsible for the duration of a calibration interval that lies ahead of you, because only the user know what influences the device is exposed to and what requirements it must meet.

In order to change a calibration interval recommended by the manufacturer of the measuring device, the user can derive from a calibration history (the evaluation of previous calibration results) how the electrical properties of his measuring device are drifting. A prognosis of the parameter accuracy of the device for a future calibration interval can then be derived from this evaluation. Of course, this prognosis only applies as long as you are sure that the measuring device is not defective.

There are regulated regulations in medical technology corresponding to the guidelines (MPG, MPBetriebV) that must be adhered to. Quality management standards such as the DIN EN ISO 9000 family of standards apply to other devices.

How does the shipping work?

At KSW Kalibrierservice GmbH, we do everything possible to ensure that your measuring instruments are always returned on time and undamaged. Parcels often cover hundreds of kilometers on their way to the recipient. Your shipments will only arrive safely and undamaged if they are packed in the right way using suitable materials.

  • Use high quality cardboard boxes made of double wall corrugated cardboard.
  • Maintain a distance of 6 cm between the contents of the shipment and all the walls of the box.
  • Firmly fill all cavities (e.g. with machine-crumpled Kraft paper)


Do you have any questions about our services?

If you cannot find the service you want straight away, we will be happy to help you by phone or email. If our calibration service cannot really make you the right offer, we will place your order with one of our partners. You can reach us by phone on +49 30 5539 74 67 or using our inquiry form.