Note On Beckhoff Calibration Certificates - Beckhoff EL3681 Documentation

2.4

Note on Beckhoff calibration certificates

Basically every Beckhoff analogue device (input or output) will be justified i.e. will be calibrated during
production. This procedure won't be documented unique. This documentation as a calibration certificate is
only provided for devices that are expressly delivered with a certificate.
The calibration certificate (or German: "Kalibrierschein") entitles the residual error after compensation/
adjustment to the used standard (reference device). The calibration certificate (as a PDF document) is to be
assigned to the device via a unique number. It is therefore not a statement about a device class such as e.g.
an approval, but always only applies to a single, named device. It is available for download.
The calibration certificate documents the measurement accuracy at the time the certificate was issued and
contains, among other things, information on the ambient conditions and the reference instrument used. It
does not contain statement about the behavior or the change of the measuring accuracy in the future. A
calibration certificate acts as a backtracking view to the previous time of usage. By reiterated certification
procedures over years (without justification) it allows making conclusions about its ageing behavior, so called
calibrate history.
Performance levels of the calibration certificates
Different "qualities" of a calibration certificate are common:
• Beckhoff calibration certificates
Such IP20 terminals can be usually identified by the product suffix -0020. The certificate is issued in
Beckhoff production as PDF.
The terminals can be obtained from Beckhoff and recalibrated by the Beckhoff service department.
• ISO17025 calibration certificates
Such IP20 terminals can be usually identified by the product suffix -0030. The certificate is issued by a
service provider on behalf of Beckhoff as part of Beckhoff production and delivered by Beckhoff as a
PDF.
The terminals can be obtained from Beckhoff and recalibrated by the Beckhoff service department.
• DAkkS calibration certificates (German: "Deutsche Akkreditierungsstelle GmbH")
Such IP20 terminals can be usually identified by the product suffix -0030. The certificate is issued by a
accredited service provider on behalf of Beckhoff as a part of Beckhoff production and delivered by
Beckhoff as a PDF.
The terminals can be obtained from Beckhoff and recalibrated by the Beckhoff service department.
EL3681 Version: 3.0
Product description
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