Calibration

Calibration means comparing a measured value with the correct (traceable) value under specified conditions. The deviation is documented, the measurement uncertainty is calculated and the certificate certificate is issued. This method achieves maximum precision and ensures the quality of the measurements and therefore the quality of your products.

Calibration hardness testing machines

As an accredited calibration laboratory, we give you the assurance that the hardness testing machines in your company are calibrated in accordance with the applicable DIN EN ISO and ASTM standards and that the calibration certificates issued are complete and conform to the standards.

Due to the constant monitoring of our calibration laboratory by the German Accreditation Authority (DAkkS), our services always comply with the specified standards and give you security for your audit.

We calibrate your hardness testing machines independently of the manufacturer and with the highest precision.

Our experienced calibration technicians use standard-compliant and traceable measuring equipment. By verifying and, if necessary, adjusting your testing machines, we minimize malfunctions and machine downtimes, thereby maximizing your productivity.

You also receive an evaluation of the results of the accredited calibration.

As part of our calibration contract, we offer you the cost-optimized execution of calibrations according to your specifications! We monitor the deadlines and coordinate with you to ensure that your hardness and spring testers are always calibrated regularly and in compliance with standards.

Calibration scope

The scope of calibration includes:Our range of services includes the calibration of hardness testing machines
according to DIN EN ISO and ASTM:
Preliminary test according to standard specificationBrinell-methods (DIN EN ISO 6506 / ASTM E10)
Calibration of the test methods requested by the customer on the test machine in accordance with the standardVickers-methods (DIN EN ISO 6507 / ASTM E92)
Function testRockwell-methods (DIN EN ISO 6508 / ASTM E18)
Direct and indirect verificationKnoop-methods (DIN EN ISO 4545 / ASTM E92)
Evaluation of the calibration under consideration of the measurement uncertaintyCHD-methods (ESI Validation)
Documentation of calibration, statement of conformity to standards, Traceability to national standardsHBT-methods (ESI Validation)
Issuing the calibration certificate
Sending the electronic calibration certificate by E-Mail

Accredited hardness test methods

Test methodMeasuring rangeStandard
Brinell (HBW)60 – 650 HBWDIN EN ISO 6506-2
ASTM E10
Vickers (HV)140 – 840 HVDIN EN ISO 6507-2
ASTM E92 / E384
Rockwell (HR)
HRA20 – 88 HRADIN EN ISO 6508-2
ASTM E18
HRBW20 – 100 HRBWDIN EN ISO 6508-2
ASTM E18
HRC20 – 70 HRCDIN EN ISO 6508-2
ASTM E18
HRD40 – 77 HRD DIN EN ISO 6508-2
ASTM E18
HREW70 – 100 HREWDIN EN ISO 6508-2
ASTM E18
HRFW60 – 100 HRFWDIN EN ISO 6508-2
ASTM E18
HRGW30 – 94 HRGWDIN EN ISO 6508-2
ASTM E18
HRHW80 – 100 HRHWDIN EN ISO 6508-2
ASTM E18
HRKW40 – 100 HRKWDIN EN ISO 6508-2
ASTM E18
HRLW60 – 110 HRLWASTM E18
HRMW40 – 110 HRMWASTM E18
HRPW20 – 110 HRPWASTM E18
HRRW20 – 110 HRRWASTM E18
HRSW20 – 110 HRSWASTM E18
HRVW20 – 110 HRVWASTM E18
Super-Rockwell (HR)
HR15N / HR30N / HR45N20 – 91 HRNDIN EN ISO 6508-2
ASTM E18
HR15TW / HR30TW / HR45TW12 – 93 HRTWDIN EN ISO 6508-2
ASTM E18
HR15WW / HR30WW / HR45WW20 – 95 HRWWASTM E18
HR15XW / HR30XW / HR45XW20 – 95 HRXWASTM E18
HR15YW / HR30YW / HR45YW20 – 95 HRYWASTM E18
Knoop (HK)140 – 840 HKDIN EN ISO 4545-2
ASTM E92 / E384
Special methods
HR2,5/62,540 – 85 HR2,5/62,5ESI Validation
HR2,5/187,525 – 70 HR2,5/187,5ESI Validation
HR187,5/1000EHT 0,15mm – 1,43mmESI Validation
HBW-T60 – 500 HBW-TESI Validation
Calibration of spring testing machines / torsion testing machines

As an accredited calibration laboratory, we give you the assurance that the spring testing machines in your company are calibrated in accordance with the valid DIN EN ISO 7500-1 standard and that the calibration certificates issued are complete and conform to the standard.

Due to the constant monitoring of our calibration laboratory by the German Accreditation Authority (DAkkS), our services always comply with the specified standards and give you security for your audit.

We calibrate your spring testing machines independently of the manufacturer and with the highest precision.

Our experienced calibration technicians use standard-compliant and traceable measuring equipment. By checking your testing machines, we reduce faults and machine downtimes to a minimum and thus maximize your productivity. Reliable measurement results help you avoid product complaints.

You also receive an assessment of the results of the accredited calibration.

As part of our calibration contract, we offer you the cost-optimized execution of calibrations according to your specifications! We monitor the deadlines and coordinate with you to ensure that your hardness and spring testers are always calibrated regularly and in compliance with standards.

Calibration scope

We are the first calibration laboratory to specialize in spring testing machines for precision springs.

Since August 2021, we have extended our accreditation to include the measurand torque. This gives us the opportunity to offer DAkkS calibration of torsion testing machines.

The calibration scope includes:The spectrum includes the force measurement for springs according to ESI validation ESI-KA F060504 V7.0:2017:
Preliminary test according to standard specificationGeneral inspection of the testing machine including the machine parts for force application
Measurement of the parallelism of the pressure platesCalibration of the force measuring device
Calibration of the test methods requested by the customer on the test device according to standard/validationCalibration of the length measuring device
Issuing the calibration certificate
Sending the electronic calibration certificate by E-Mail
At the customer’s request, we carry out a measuring equipment capability analysis (in accordance with MSA procedure 1) to determine the repeatability (Cg/Cgk) with your test parts.
MeasurandMeasuring rangeStandard
Force0,1 N – 50 kNDIN EN ISO 7500-1
Length25mm – 50mm – 75mmESI Validation
Torque1•10-4 Nm – 20 NmESI Validation