roadrunner wrote:... there were suggestions that it was caused by punching two controls within too short a space of time (opinions differed as to what the limit was). The last two controls on most (all?) courses were pretty close together,... it does make you wonder whether some of the tags couldn't record two punches less than 6 seconds apart. I was also told that there were two sorts of tag, and that the elites got one of each, while the others all had one of the types; I don't know whether that's also a factor. ...
Advice for Event Advisers and Controllers How to control Emit Touch-Free system wrote:The competitor will glance at the emiTag when they are near the control to see that the emiTag is flashing; that confirms they have punched successfully. Therefore, there must be no possibility that the emiTag is actually still flashing from a previous control. That previous control may be one that the competitor deliberately punched, or one that the competitor inadvertently punched by passing near it. Therefore, if emiTags with a flash time of 10 seconds are being used, the minimum separation of controls must be 50 metres because a runner moving at 3.5 min/km covers 48 metres in 10 seconds. For 2016 emiTags which only flash for 5 seconds, a minimum separation of 25 metres is sufficient.
Advice for Event Advisers and Controllers How to control Emit Touch-Free system