Technical Information
PRIMES Calibration Laboratory
1. General information
The calibration laboratory of PRIMES GmbH is based on the requirements of DIN EN ISO/IEC 17025.
At present PRIMES GmbH builds a new additional company building. With its completion additional space
will be available, which will allow a better and easier implementation of the structural and organizational
requirements of DIN EN ISO/IEC 17025. These requirements imply among other aspects the effective
separation between areas as well as an adequate control of the premises regarding the environmental
conditions and access. After completion of the new building, the activities for preparing and applying foraccreditation according to DIN EN ISO/IEC 17025 will be resumed accordingly.
The quality management system of PRIMES GmbH is certified according to DIN EN ISO 9001:2015.
Calibrations, which should meet the requirements of IATF 16949 / chapter 7.1.5.3, can be performed forall power meters manufactured by PRIMES GmbH.
As a manufacturer, PRIMES is the only one who, in addition to calibrating (incl. certificate) or verifying(incl. CoQ) PRIMES measuring instruments, can also officially adjust or repair them.

2. Definition of terms
TermDefinition“Calibration means the determination and documentation of the deviation of the displayof a measuring instrument (or the specified value of a material measure) from theconventionally correct value of the measured quantity.”
Source: DAkkS-DKD-4 "Traceability of measuring and test equipment to nationalstandards".

Calibration“Operation that, under specified conditions, in a first step, establishes a relation between
the quantity values with measurement uncertainties provided by measurement standards
and corresponding indications with associated measurement uncertainties and, in asecond step, uses this information to establish a relation for obtaining a measurement
result from an indication.
NOTE 1: A calibration may be expressed by a statement, calibration function, calibration
diagram, calibration curve, or calibration table. In some cases, it may consist of anadditive or multiplicative correction of the indication with associated measurement
uncertainty.
NOTE 2: Calibration should not be confused with adjustment of a measuring system,
often mistakenly called “self-calibration”, nor with verification of calibration”.
Source: VIM, JCGM 2012, Term: calibration 2.39 (6.11)

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TermDefinition"Provision of objective evidence that a given item fulfils specified requirements.
EXAMPLE 2: Confirmation that performance properties or legal requirements of ameasuring system are achieved.
EXAMPLE 3: Confirmation that a target measurement uncertainty can be met.

Verification

Note 3 to entry: The specified requirements may be, for example, that a manufacturer's
specifications are met.
NOTE 5 to the term: Verification should not be confused with calibration. Not every
verification is a validation.”
Source: DIN EN ISO/IEC 17025:2017"Set of operations required to ensure that measuring equipment (3.11.6) conforms to therequirements (3.6.4) for its intended use.

Metrological confirmation

Note 1 to entry: Metrological confirmation generally includes calibration or verification(3.8.12), any necessary adjustment or repair (3.12.9), and subsequent recalibration,comparison with the metrological requirements for the intended use of the equipment, as
well as any required sealing and labelling.
Note 2 to entry: Metrological confirmation is not achieved until and unless the fitness ofthe measuring equipment for the intended use has been demonstrated anddocumented."
Source: DIN EN ISO 9000:2015-11

Table 1: Terms

3. Laboratory scope
The calibration laboratory of PRIMES GmbH offers the calibration for laser power as well as theverification of the beam geometry for PRIMES measuring instruments. Services for devices of othermanufacturers are available on request.
3.1. Power calibration
WavelengthPower

Uncertainty in measurement

CO250 W – 3000 W

±2%

NIR

20 W – 6000 W±2%

Table 2: Achievable measurement uncertainty by power calibration

The given values describe the measurement uncertainty that is achievable in our laboratory. Essentially, it
is determined by the measurement uncertainty assigned to our reference standards. The measurement
uncertainty of our reference standards is typically in the range of 1 %. Electronic copies of the certificationof our reference standards can be viewed on our website (https://www.primes.de/en/services/calibrationlaboratory.html).
Certificates issued by our laboratory state whether the uncertainty of a measurement of a test sample
determined during a calibration corresponds to the specifications in the data sheet of the test sample.
3.2. Verification of beam geometry: measurement of beam diameters and beam caustics
For the following table it is assumed that a measurement was evaluated with a positive overall rating in the'Review' window of our software, i.e. that it meets the criteria of ISO 11146 for a reliable measurement.

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The measurement uncertainty is the sum of a relative part (of the measured value) and an absolute part(of the edge length of the measurement window in the area of the focus or the examined measurement
plane).
Measurand

Wavelength

Device*10 600 nm (only via
mechanical scanning (BM,for small beams FM));Raw beam

1 070 nm, 1 064 nm, 532nm and 355 nm(mechanical scanning anddirect measurement withcamera (LQM))

Uncertainty in measurement

BM, LQM,
for small beams FM

Radius:relative share: ±4 % of meas.value,absolute share ±2 % of full scale(measurement window size)

FM, MSM

Radius:relative share: ±4 % of meas.value,absolute share ±2 % of full scale(measurement window size)

Focused beam

Reference measurement on
a focused raw beam; only
the specific raw beams
mentioned in the row above
can be considered as
reference beams (beamparameters are known)

Divergence

Derived by beam diametervia propagation (verification
BM, FM, LQM, MSM
of z-axis against mechanicalstandard)± 10 % of measurement value

M²

Derived by beam diametervia propagation (verification
BM, FM, LQM, MSMof z-axis against mechanicalstandard)± 10 % of measurement value

Table 3: Achievable measurement uncertainty by the verification of beam geometry* The mentioned abbreviations stand for the complete device families

4. Calibration procedure
4.1. Power measurement
The power calibration is carried out according to the technical specifications of DIN EN ISO 11554 and istraceable to national standards of the PTB (Physikalisch-Technische Bundesanstalt, Braunschweig,Germany). A calibration certificate is issued as the result of the measurement.
4.2. Verification of the beam geometry
As one of few manufacturers we offer various devices with different physical working principles(mechanical scanning devices as well as camera-based devices). This allows us to make directcomparisons of different device classes and thus exclude artifacts caused by working principle.
The verification of the measurement of the geometrical properties of the beam can be done withtraceability to internal factory standards. The verification is based on traceability to mechanical quantities(length) and intensity (linearity). Among other things, we rely on the comparison with a fiber end of known
diameter as well as mechanical reference standards.
As a result of the verification a Certificate of Quality (CoQ) is issued.

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5. Calibration work instructions
Our calibration laboratory has work instructions for all processes in the laboratory area for whichcalibration certificates or CoQs are issued. These work instructions are integrated into our quality
management system.

6. Calibration laboratory personnel
For more than 25 years PRIMES GmbH is dedicated to beam diagnostics of high power lasers. During thisperiod it has achieved a leading role in many industrial sectors worldwide. Our organisational structure
ensures that only trained and instructed personnel calibrates equipment. The department managers will
ensure that each calibration is carried out and checked correctly.
Continuous quality assurance and the expansion of calibration competencies are ensured by theCalibration Working Committee.
The monitoring of the calibration and measuring equipment is ensured by a measuring equipment officer.
The competence of calibration laboratory personnel is ensured by various factors/procedures:- Scientific studies- Training as a physics laboratory technician- Training and experience in the operation of PRIMES measuring instruments- Participation in internal training courses
The following personnel functional areas are defined for the calibration laboratory:- Organizational management of the calibration laboratory- Technical management of the calibration laboratory- Head of Calibration Laboratory 1 / Head of Calibration Laboratory 2- Physics laboratory technician- Trainee physics laboratory technician
In addition, there is a small number of clerks, especially for the commercial part of order processing,shipping or documentation.
Personal information on individual employees is subject to data protection.

7. Metrological traceability of power calibrations
The starting point for the work in the calibration laboratory is a reference standard certified by PTB, which
serves as our reference/gold standard. Our PTB-certified reference standards are certified with a deviationof 0.8-1.2 % for the different power ranges (120 W to 2 kW) and wavelengths (YAG and CO 2). Together
with our various high power lasers we can calibrate all power meters in real operating conditions.
More information on the subject of standards and traceability can be found in our Traceability Chart, whichis part of every certificate or available on demand via our sales or technical support team.

8. Storage periods of records
Calibration data and certificates shall be kept for a period of 10 years. After expiry of the period, the data
will not be deleted but, if possible, kept indefinitely for customer enquiries and statistical evaluations.

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9. Supporting documents-Traceability chart-

Template Calibration Certificate-

Template Certificate of Quality-

Final inspection and calibration PVA_8-5-Calibration working committee PAA_5-3-2-7

10. Change history
VersionDate

Changes, Abbreviation

1.0

17.03.2020

First edition, Members AKK (VB, RK, SW, TU), QM (LMF), Translation: TechnicalSupport (BK)

2.0

14.09.2020

Format, adapt to the CI (MW)

3.0

28.10.2020

Revision of chapter 1 (LMF, TU, RK, BK)

3.1

09.11.2020

CI adaption (MW)

3.2

23.11.2020

CI Adaption (MW)

4.0

28.04.2021

Chapter 8 Storage period added, jra

4.1

26.01.2022

Paragraph 3 in chapter 1 added, lmf

4.2

23.05.2022

Adjustment of the laboratory scope, jra, thFile: Technical Information PRIMES Calibration Laboratory_V4-2.docx© 2022 PRIMES GmbH

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