As we know in are daily checks one of them is to check the calibration plaque
on the tacho as digital tachos have been out now for just under 3 years.
I wonder when you last looked at there calibration plaque to see when due.
And if Coffeeholic is reading this is there a 7 day grace or would it be pg9 if stopped at road side check.
Del
delboytwo:
And if Coffeeholic is reading this is there a 7 day grace or would it be pg9 if stopped at road side check.
No idea. I never look anyway as the vehicle I drive is only about 6 months old so I’m guessing the calibration date will be okay.
I started a coach up yesterday morning.It flashed up “Two year service pre warning”.So I think it actually tells you itself.
Digital Tachographs require a ‘Periodic Inspection’ within two years of their last Inspection or Initial Calibration. They also require a PI after a change of registration number (cherished numbers), after a ‘repair,’ if there is an alteration in the tyre size fitted to the drive axle or if the value of ‘w’ changes - the coefficient of the vehicle - the number of impulses emitted by the gearbox motion sensor for 1 km travelled under standard test conditions. 
A PI includes a full calibration.
The sticker is usually put on the B pillar of the drivers door or sometimes on the drivers seat base. Just make sure that the day you are driving the vehicle is within 2 years of the date shown on the sticker. Both the driver and employer commit an offence if a vehicle is used outside the calibration period. There is no ‘grace period.’ Usually dealt with, at present, (will probably be a Fixed Penalty Notice offence later this year) by an Offence Rectification Notice - get it done within next 21 days and provide proof and nothing further happens. If the date is ‘way out’ expect a ‘delayed’ (7 days) Prohibition.
The ‘service pre warning’ is a useful feature, provided the calibration centre remembered to set it - no legal requirement to.