Calibration services

Fast and efficient calibrations to the highest standard

We calibrate medical instruments globally to maximise the life of the product, check measurement accuracy and compliance to manufacturers and international standards. We endeavour to provide a high level of service with a fast turnaround time with competitive pricing. We calibrate and support all audiological equipment from leading manufacturers and many other types of medical equipment. We offer a return to base calibration service and an on-site calibration service.

A: Return to base calibration

Send the instrument to Amplivox. A calibration can be completed in as little as a day and takes up to 72 hours to complete and be returned to you.

B: On-site calibration

If needed we can visit companies and calibrate equipment on site. This is recommended for companies who have many instruments so they can be calibrated at once. Due to high demand, we advise to book on-site calibrations as early as possible in order to meet preferred times.

How to book a calibration

  • user-manuals-icon

    Complete the
    returns form

    To enable a fast turnaround time for your calibration, pre-book by emailing us your completed UK Returns or International Returns form at We will immediately book this in and await delivery. 

    Download and complete the appropriate form below:

    UK Returns form

    International Returns form.

  • send-instrument-icon

    Send us your instrument

    UK customers

    Include the UK Returns form with your instrument and it’s headset. The shipping label is already completed on the second page of the returns form. We will contact you when the medical instrument has been received.

    International customers

    Email the completed International Returns form to We will provide an RMA number (this may take approx. 6 working hrs, weekdays) to add to the International Returns Form. Send the form and instrument to us.

  • return-instrument-icon

    Returning your instrument

    Once the instrument has been calibrated it will be returned depending on the type of account that you have with Amplivox. 

    If you have an account or have provided the required purchase order details (or other payment details), we will invoice and return the equipment straight away. 

    If additional work is required or we are waiting for confirmation to pay the invoice, you will be notified. All calibrations can be paid for by credit card, cheque or bank transfer.


Include a printout of the completed UK or International Returns form and send with the medical instrument. Also include the headset.

Please back up and remove personal data from your instrument before sending to Amplivox. If instruments are sent containing personal data, you are fully responsible for any such disclosure. Amplivox will delete any personal data immediately from the instruments without any further notice.

Calibration code request

Frequently asked questions

  • What is audiometer calibration?

    Medical equipment calibration is required to ensure all equipment is in full working to maintain instrument accuracy and to ensure the device is compliant with medical and legal standards. Calibration of an audiometer is a technical process requiring adherence to the relevant standards.

    Why choose Amplivox for your calibration services?

    Our customer support team work with carefully selected partners, engineers and technicians to manage and deliver a state-of-the-art calibration service to thousands of customers around the world.

    By choosing Amplivox, you can rest assured that your instrument will be measured according to the appropriate standards and with the highest levels of care. Our team will support you in reminding you about your calibration as well as help booking you in for the appropriate service.

    Which products do we calibrate?

    We calibrate and support all screening and diagnostic audiological medical equipment including audiometers, tympanometers (impedance meters), Otoacoustic Emissions (OAE), Hearing Instrument Test (HiT) boxes and Evoked Response Audiometers.

    Our services support many of the world’s leading audiological instrument manufacturers including: Interacoustics, Grason- Stadler, Maico, MedRX and Otometrics. To find out if we support your device, please contact us today.

  • When should audiological equipment be calibrated?

    Medical equipment should be calibrated according to manufacturer’s guidelines and legal requirements. These may differ by country and we will support you to ensure you are aware of the requirements. When test results seem to be off expected measurements, a calibration will ensure the equipment measurements are returned to the right standard. This can for example happen when an instrument is dropped or had a sudden shock.

    How long will my calibration take?

    We offer various calibration services to suit your requirements from an on-site calibration to a return to base calibration. When choosing a return to base calibration, your equipment will be calibrated and returned to you in 72 hours of receipt and remains fully insured at all times.

    What standards does Amplivox calibrate towards?

    Amplivox and partners are accredited to the latest ISO 13485:2016 standard and all audiometric calibration work is performed according to the following standards:

    •   Air conduction – ISO 389-1: 2017

    •   Insert earphones – ISO 389-2: 1997

    •   Bone Conduction – ISO 389-3:2016

    •   Narrow band noise – ISO 389-4: 1999

    When choosing Amplivox for your calibration services, you can rest assured that all equipment is maintained according to National standards with clear traceability.