It's advised that you have your HAL Series Accessory Packs calibrated every 12
months to ensure its accuracy, or you may be unfortunate and have to
have your HAL Series Accessory Packs repaired.
Calibrate your HAL Series Accessory Packs
If you wish to calibrate your HAL Series Accessory Packs, please locate the nearest
service center or contact us directly using the link below.