Equipment calibration has never been easier

• Card Payment: Accepted over the phone once we have received your meter. We do not take payment in advance.

• Cheque: May be included with your shipment or provided upon collection. Please make cheques payable to Bowmonk Ltd.

• Purchase Order (PO): Available to approved account holders.

Important: We do not accept bank transfers for calibration services.

To help us process your order promptly, please print and enclose the reminder letter, ensuring your chosen payment option is ticked and all relevant information is completed. This enables us to complete the procedure efficiently and minimises downtime for your unit.

Failure to include the completed reminder letter may result in delays returning your meter.

If you have not received a reminder letter or need another copy, please download and print it here.

Our recommended calibration intervals for UK customers are shown below. Different intervals may apply to export markets.

The Driver and Vehicle Standards Agency (DVSA) has introduced updated requirements for the calibration of all portable Decelerometer / Brake Test Meters, including both mechanical and electronic models.

Under the new guidelines:

All Brake Test Meters must now be calibrated every 12 months.

If your current calibration certificate was issued before 1 April 2023, it remains valid until its stated expiry date, which may be up to 31 March 2025.

Any Brake Test Meters purchased on or after 1 April 2023 must be calibrated annually from the date of issue.

These changes have been implemented by the DVSA to ensure consistent and accurate brake testing across the industry.

BrakeCheck (all variants) – calibration required every year
Bowmonk VI & 2000 – calibration required every year
AFM2 Runway Friction Tester – calibration required every year
TintTesta – calibration required every year or every 2,500 tests
Tyre Depth Gauges – calibration required every 6 Months
Tyre Pressure Gauges – calibration required every 6 Months
Brakemeter / Dynometer – calibration required every year

Please note that in the UK it is mandated to have portable brake testing equipment calibrated at least every year if used for MOT testing purposes. If you are a non-UK customer then please check with your local authority for the applicable regulations regarding calibration intervals.

All Bowmonk / Tapley decelerometers are fitted with a sticker on the back of the unit, which includes a section labelled “RECAL DUE”. This shows the exact date your meter is due for its next calibration.

This date indicates when your calibration expires — any use beyond this date means the meter is officially out of calibration and no longer compliant with DVSA requirements.

In addition, all of our electronic instruments, including the AFM2, automatically display the next calibration due date on each printed test receipt.

Please check your device regularly to ensure it remains within its valid calibration period.

In addition the devices notify users that calibration is due as follows:

• BrakeCheck (all variants) – a warning LED flashes 14 days before calibration is due, remaining permanently lit thereafter.
• Bowmonk VI & 2000 – an on-screen message appears on/after the due date.
• AFM2 Runway Friction Tester – the due date is shown briefly on-screen every time the instrument starts, and an on-screen “service” message appears on/after the due date.
• TintTesta – a warning LED flashes 14 days before calibration is due, remaining permanently lit thereafter. The LED is also permanently lit if the maximum number of tests has been exceeded.
• Brakemeter / Dynometer – no notification (refer to sticker).

When your decelerometer is due for calibration please contact us first. Additional customs and/or courier charges may apply if you do not follow our instructions.

Return Address for all Calibrations:

FAO: Calibration Dept
Bowmonk Ltd
Diamond Road
Norwich
Norfolk
NR6 6AW
United Kingdom

Tel: +44 (0) 1603 485 153

To help us process your order promptly, please print and enclose the reminder letter, ensuring your chosen payment option is ticked and all relevant information is completed. This enables us to complete the procedure efficiently and minimises downtime for your unit.

Failure to include the completed reminder letter may result in delays returning your meter.

If you have not received a reminder letter or need another copy, please download and print it here.