Re: Trying Veo and cgm… Home › Forums › Trying Veo and cgm… › Re: Trying Veo and cgm… 7 April, 2011 at 3:44 pm #8558 AlisonKeymaster You might have your “Lost sensor alarm” set for less than that though, so don’t be surprised if it alarms! You can change that. The device can store the data for up to 40mins, beyond that you need to do a blood test to get it going again.