The milking machine can transmit infection onto teats and disturb normal teat health. Milking‐time tests allow advisors to quantify the degree to which the milking machine might be contributing to the risk of new intra‐mammary infection. Cows' teat size and position have changed as have milk flow rates. Milk yields have been rising faster than unit attachment times. Milk flow rate has been shown to be positively associated with risk of new intra‐mammary infection. Vacuum traces collected during milking can illustrate problems with biphasic milk flow or over milking and pressure records can help assess liner function. Lightweight data logging equipment is now available with excellent software to assist with interpretation.

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Udder health problems are often related to the milking equipment, many times in combination with inadequate milking routines. Notorious are teat-end vacuum fluctuations due to insufficient vacuum capacity, pathogens reaching the teat-end due to 'back-spray', and of course insufficient preparation before milking. Most veterinarians are familiar with the Milking Time Test, or 'wet test'. In the wet test, the milking vacuum and pulsation are recorded during milking, which gives a good indication of how the milking equipment and milking routines perform in real life - when milking cows. Veterinarians understand the high value of this wet test because it helps them determine if an udder health problem is animal related or equipment related. Despite this, many veterinarians are reluctant to do a wet test because of the perceived complexity and time it consumes. When normally performing a wet test, the veterinarian is wired to the milking point, meaning that the milking routines cannot be observed; moreover, the veterinarian's presence disturbs the milking routine. To get a good overview, data for quite a few cow milkings should be recorded, which implies that the veterinarian is trapped in the milking parlor and cannot spend his valuable time on anything else. This poster is about experiences of European veterinarians and advisers with a new battery operated data logger that logs the vacuum autonomously at four points during milking. This data logger (VaDia) is small and light enough to be taped to a teat cup and makes wet testing much easier, faster, and hands- and eyes-free.