My observation is that Libre shows slant arrow at 1 pts per min, whereas dexcom is 2. So while dexcom stays flat, Libre seems to oscillate more between flat and slant arrow when I am rising or dropping slowly. Dexcom stays flat arrow, but the numbers are slowly increasing/decreasing.
Time. Libre. Dexcom. Meter BG
9:14p. 92 D. 98 F. Next 110, Neo 99
9:20p. 87 D. 96 F
9:25p 82 D. 93 F
9:30p. 80 F. 90 F
9:40p. 74 D. 87 F
9:45p. 77 F. 87 F. Next 94, Neo 86.
9:55p. 71 F, 82 F
10:05p 73 F, 81 F.
11:10p 80 F, 86 F.
9:45 Bounce from 74 to 77, was that due to Neo BG check ?? What if not using FS Libre Neo strips, and use another meter ? I have not found option to log/enter BG from another meter. Does Libre try to correlate/adjust based on Meter BG ?
But dexcom also showed 5 pt drop. So maybe coincidence.
I did not enter BG to dexcom.
Since I am doing many more readings than listed, the battery is wearing down fast. I charged last night, and now about 1/3 left. May have to charge every day !
Update: after 2nd recharge, Libre is now lasting 2 days, and still showing full charge.
Summary for 50 minutes
Libre 19 point drop, several with slant arrow down. (92 - 73)
Dexcom. 17 point drop, always flat. (98 - 81)
Next… experiment with super fast up or down to get dexcom double arrows !!!
EDIT: According to manual, the Neo meter BG readings do not ‘calibrate’ the Libre. The sensor is calibrated ‘at the factory’.