Force Measurement in all its variety
Calibration services
for the measurand "force "
The calibration of devices and systems is of crucial importance when it comes to the accuracy and reliability of measurements. This also applies to force transducers or force sensors. Especially when they are used in applications that are subject to specified standards, a corresponding calibration certificate is often also relevant.
Arguments in favour of calibrating force transducers
Ensure accuracy
Uncalibrated sensors can provide inaccurate measured values, leading to incorrect results. Calibration identifies deviations and errors. The resulting (re-)adjustment improves the accuracy of the measurements.
Standards and regulations
Many applications require compliance with certain standards and regulations. Calibration ensures that the sensors meet these standards and therefore fulfill the quality and safety requirements.
Avoidance of safety risks
Inaccurate sensors and the resulting faulty measurements may mean that critical conditions in machines and systems cannot be detected in good time. This increases the risk to people and machines in applications that involve the detection of risky conditions, such as overload monitoring.
Avoidance of production errors
Inaccurate measurements can lead to faulty products in production and thus to rejects. Timely and regular calibration of the force transducers reduces errors. This improves production quality and reduces costs.
Guarantee reliability
Sensors drift over time, which leads to a gradual deterioration in accuracy. Regular calibration identifies deviations at an early stage.
Confidence in measurement results
Calibrated sensors guarantee reliable measurement results. This is particularly important in areas such as medical technology or safety applications where precise measurements are crucial.
Traceability
Regular calibration ensures that measurements can be traced back to known reference standards. An important aspect for the traceability of measurements and the validation of test results.
Creation of factory calibration certificates
Primosensor offers the creation of factory calibration certificates (ISO certificates) in various versions for Primosensor tension and compression force transducers and force measuring units. Calibration certificates for tensile and/or compressive forces and the load levels or nominal loads (Fnom) from 1 kN to 100 kN are available as standard. For higher forces on request.
As a reference, we use DaKKs-calibrated force sensors in our force standard measuring devices during calibration. This means that our factory calibration certificates guarantee traceability to “national standards”.
Increasing and decreasing tensile and/or compressive forces are continuously applied to the force sensors in the measuring device. The measured values determined are recorded in certain defined stages and the device to be calibrated is compared with the reference.
The Primosensor testing machines work with a measurement uncertainty of <5 x 10-3. The factory calibration certificates issued contain information on both the measurement uncertainty of our testing machine and the measurement uncertainty (“accuracy”) of the calibrated force transducer.
When carrying out the calibration, we are guided by the currently valid norms and standards for the calibration of force transducers. For example, DIN EN ISO/IEC 17025 as the globally valid standard for testing and calibration laboratories and ISO 376 and DKD-R 3-3.
Capture multiple loads together
It is often useful to record and analyze multiple loads together. For example, the total load on a lifting platform with several lifting devices is of interest. Additionally, one might want to detect the overload of a single lifting unit and interrupt the lifting process accordingly. The Primosensor S-Box fulfills this task. It sums up to 8 analog signals and checks each individual signal for limit exceedances and cable breaks. The S-Box is suitable and certified for use with force transducers that provide a test signal.
We are currently renewing our certifications. The applications are being expanded to include 2-channel sensors.
Find out more about our product:
S-Box signal totalizer
Why a calibration with a test certificate?
Warum eigentlich eine Kalibrierung mit Prüfschein? Welche Gründe können zur Forderung nach einer Kalibrierung mit Prüfschein führen und was ist dabei zu beachten?
Dazu ist vorweg anzumerken, dass unsere Sensoren vor Auslieferung generell mehrere Justage- und Kalibrierzyklen durchlaufen und damit sichergestellt ist, dass sie den Angaben in unseren Datenblättern und/oder Zeichnungen entsprechen.
Reasons for an (additional) calibration certificate:
- It is often a purely formal requirement of customers, auditors, QM or standards that a corresponding “paper” is available in the form of an ISO certificate.
- Calibration with a test certificate offers additional application reliability through traceability to “national standards” and the specification of measurement uncertainties.
- (Re-)calibrations ensure compliance with the required measurement uncertainty and thus prevent the negative consequences of inaccurate measurements.
- The calibration intervals to be observed for recalibration must be specified by the user. ISO 376 specifies a maximum calibration interval of 24 months. However, users often adhere to shorter intervals, such as 12 months.
- Bear in mind: A calibration is always a backward view and not a prediction of the future behavior of the sensor. It is therefore only valid at the moment of measurement during calibration. For this reason, occasional routine checks of the force sensors or force measuring units at the user’s premises are also recommended between calibration intervals
When should a recalibration be carried out?
- After expiry of a calibration interval (see above)
- If it is determined that a sensor is no longer reproducing as originally, its measured values deviate significantly.
- If the sensor has been damaged and repaired
Calibration of force transducers
Load levels 1...100 kN
The following tables show which versions of factory calibration certificates we offer as standard:
1 measurement series upwards
| Item number | Designation | Type of calibration | Number of measurement series | Calibration levels | Measurement series | Direction of force |
|---|---|---|---|---|---|---|
| DOK000PPL300 | Simple test report Delivery bill |
3
Points Test report
(printed on delivery bill) |
1 measurement series upwards | 50% | 0% / 50% / 100% | Compression force or Tensile force |
| DOK000PPL301 | Compression and Tensile force | |||||
| DOK000HPZ500 | Manufacturer's test certificate according to DIN 55350 Part 18 4.2.2 | 5 Points Test report | 1 measurement series upwards | 25% | 0% / 25% / 50% / 75% / 100% | Compression force or Tensile force |
| DOK000HPZ501 | Compression and Tensile force | |||||
| DOK000HPZ100 | 10 Points Test report | 1 measurement series upwards | 10% | 0% / 10% / 20% / 30% / 50% / 60% / 70% / 80% / 90% / 100% | Compression force or Tensile force | |
| DOK000HPZ101 | Compression and Tensile force |
1 measurement series upwards and downwards
| Item number | Designation | Type of calibration | Number of measurement series | Calibration levels | Measurement series | Direction of force |
|---|---|---|---|---|---|---|
| DOK000PPL310 | Simple test report Delivery bill |
3
Points Test report
(printed on delivery bill) |
1 measurement series upwards and downwards | 50% | 0% / 50% / 100% | Compression force or Tensile force |
| DOK000PPL311 | Compression and Tensile force | |||||
| DOK000HPZ510 | Manufacturer's test certificate according to DIN 55350 Part 18 4.2.2 | 5 Points Test report | 1 measurement series upwards and downwards | 25% | 0% / 25% / 50% / 75% / 100% | Compression force or Tensile force |
| DOK000HPZ511 | Compression and Tensile force | |||||
| DOK000HPZ110 | 10 Points Test report | 1 measurement series upwards and downwards | 10% | 0% / 10% / 20% / 30% / 50% / 60% / 70% / 80% / 90% / 100% | Compression force or Tensile force | |
| DOK000HPZ111 | Compression and Tensile force |
Design variants other than those listed here are available on request.
