Robmac
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Do you send them away for recalibration ?
Helen uses one at work for doing random tests on employees and has to send it away for recalibration every 12 months
She has only ever found one person to be over the limit and he was over 3 times the limit at 8.00am and he came to work on a motorbike.
But he swore that the last drink he’d had was 10pm the night before but he blew the same on two different machines.
And he had turned up to drive an ambulance.
But despite blowing 3 times over and Helen telling him to leave his bike at work and she would get someone to drive him home, he ignored her and jumped on his bike to go home.
Mine's an Alcosense Richard and yes I send it away for recalibration. However, it's getting on a bit now so I will be replacing it with a newer version in the near future.
I remember one meet at Buxworth. It took until 3 in the afternoon to get down to a zero reading after a heavy night in the Navigation.