just remembered, for Bd to figure out it was the test strips,it was actually medtronic that told me to call, i was programming new link to beam to pump, i called medtronic 1st reading was 84,w/no beam, we(medtronic & I) reprogrammed meter, then tested again ( maybe took 10 mins on the long side) got the beam and BG reading of 71. medtronic said that's a big drop in such a short time 1st treat the low, then call BD.