Kontakta oss
Norsonic AB
Hermansrovägen 8
285 36 Markaryd
0433- 122 33
info@norsonic.se
Genvägar
Hjälp
Nyhetsbrev
Anmäl dig till vårt nyhetsbrev och håll dig uppdaterad om nyheter från Norsonic.
- © 2024 Norsonic
- Sekretesspolicy
- Laget av NYG
The Norsonic Calibration Laboratory complies with the ISO 17025 quality standard and is approved by Norwegian Accreditation to perform measurements. You can always get more information about our calibration services if you contact us.
When sending instrumentation to Norsonic for calibration, you can be sure that we will take good care of your equipment, handle it carefully and with respect.
Information about the calibration work and you as a customer will be confidential, and as a customer you will get an impartial and respectful service. We keep records of all calibrations and customer data for 5 years. Your equipment will normally be returned in less than 10 working days.
Sound calibrators are calibrated using a reference microphone. This is done according to an international standard, IEC 60942, which ensures that your certificate contains the values for level, frequency and distortion with very good accuracy.
Calibrators are divided into two accuracy classes. Class 1 is intended for control of precision measuring equipment, while class 2 is intended for control of other sound measuring equipment. The class name must be on the calibrator. Our measurement procedure is called L244-02.
Especially for Norsonic calibrators: If a calibrator comes in out of specifications, the customer will of course be notified immediately. If during the calibration it turns out that only small adjustments are needed, we want to provide the service that the calibrator is adjusted as close to nominal values as is practically possible. This later gives the customer a better control of their sound measurement equipment. The customer can notify the customer supervisor that he does not want this adjustment.
Statement of conformance
For a type approved sound calibrator, the standard (IEC 60942) allows to issue a certificate which includes a “statement of conformance”. This statement is based on the type approval of the object type, and the results of the actual measurements. The statement will tell if the measurement object is working according to the requirements in the standard, or not.
If your type of sound calibrator is type approved, NCL usually includes a statement of conformance. Please contact the Customer Adviser if you do not want a statement of conformance included on your certificate.
A pistonphone is a special version of a mechanical laboratory reference calibrator. The calibration of reference pistonphones is different the calibration of other sound calibrators. This is to obtain an even better precision in the results. Pistonphones are also described in IEC 60942 standard. Our calibration procedure is called L244-40.
Calibration of sound level meters is an extensive process. It consists of both acoustic tests and simulation of sound with electrical signals. The sound level meter calibration follows the standard IEC 61672-3. Our procedure is called L244-07. Both frequency response, level linearity and the properties of measuring pulse-shaped signals are tested. Microphone and preamplifier are included in the calibration. The standard has two accuracy classes. Class 1 is used for precision sound level meters and class 2 is for general sound meters. The class is indicated on the sound meter.
Statement of conformance
For a type approved sound level meter, the standard (IEC 61672) allows to issue a certificate which includes a “statement of conformance”. This statement is based on the type approval of the object type, and the results of the actual measurements. The statement will tell if the measurement object is working according to the standard, or not.
NCL usually includes a statement of conformance on the certificate if your type of sound level meter is type approved. Please contact the Customer Adviser if you do not want this statement to be included on your certificate.
Some customers want to have their microphones and preamplifiers calibrated separately. These calibrations are more detailed in frequency response than those required for regular sound meter calibration. Our procedures for microphones and preamps are called L244-03 and L244-10 respectively. The standard procedure is to measure absolute sensitivity with a reference calibrator and frequency response using electrostatic actuator.
NCL can also calibrate your microphones and microphone preamplifier combinations (microphone set) in an anechoic chamber. Our free-field procedure L244-12 ensures high accuracy and good resolution of these measurements. The standard for calibrating microphones is called IEC 61094.
Vibration and sound are often closely related. Many customers have gradually acquired accelerometers for connection to the sound meter. We calibrate the accelerometer’s sensitivity and frequency response by comparison with a reference accelerometer in accordance with ISO 16063-21.
We can also calibrate vibration calibrators. The level, frequency and distortion of the calibrator are controlled with good accuracy. Our procedure is called L244-17.
The calibration of reference sound sources is described in ISO 6926. Our calibration procedure is L244-16. The calibration is performed in a very large hall simulating free field conditions over a reflecting plane. This hall is also used for other purposes so the laboratory only has access there two times per month. Be sure to schedule the right time with the customer advisor.
Statement of conformance
When the measurement results (without uncertainty) show that the reference sound source is within the requirements of the standard, we usually state that it “conforms to the standard”. A statement appears on your certificate. If you for one or another reason don’t want it there, please inform us and we act accordingly.
The calibration of reference sound sources is described in ISO 6926. Our calibration procedure is L244-16. The calibration is performed in a very large hall simulating free field conditions over a reflecting plane. This hall is also used for other purposes so the laboratory only has access there two times per month. Be sure to schedule the right time with the customer advisor.
Statement of conformance
When the measurement results (without uncertainty) show that the reference sound source is within the requirements of the standard, we usually state that it “conforms to the standard”. A statement appears on your certificate. If you for one or another reason don’t want it there, please inform us and we act accordingly.
At Norsonic Calibration Laboratory, we have extensive experience in calibrating and testing a wide variety of equipment, both what Norsonic has made and what is made by other manufacturers. Feel free to contact us so we can help you.
We are constantly working on improving our quality and ensure that our calibration procedures are up to date, and that the measurement equipment are regularly calibrated. We
have a continuous focus on education and our calibration technicians are well qualified for the work.
A list of our accredited services can be found at: Norsk Akkreditering.
Norsonic Calibration Laboratory
Kalibrering