# Quick Dex G5 question **URL:** \ **Category:** C/GM\ **Tags:** dexcom, calibration\ **Created:** [January 2, 2018, 5:34am UTC](https://forum.fudiabetes.org/t/quick-dex-g5-question/3054 "2018-01-02T05:34:47Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Michel](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/michel/32/387_2.png) [@Michel](https://forum.fudiabetes.org/u/Michel)\ **Post date:** [January 2, 2018, 6:26am UTC](https://forum.fudiabetes.org/t/quick-dex-g5-question/3054/2 "2018-01-02T06:26:19Z")
Welcome, @Jritchie70! You may want to introduce yourself in the [welcome thread](https://forum.fudiabetes.org/t/welcome-introduce-yourself-here/145/)! > [@Jritchie70](#): > > Let it run with the averaged number between the current Dex and the meter calibration, or should I always input the meter value a second time and force it to match the meter? Only enter it once and do NOT force the Dexcom to match your hand meter. Your hand meter is only accurate to +/- 20% or so. Your Dexcom is averaging numbers over time, and is doing a better job than any single number out of your hand meter. So it is almost always better to let the Dex do the averaging. It happens, in particular when the Dex sensor fiber has moved, that your Dexcom ends up way off, maybe 30 mg/dl or more off. In that case, you are better off hand metering twice and entering both calibrations over 5-10 minutes, once after the other, rather than double entering one value. Do note, btw, that the Dex only averages when your hand meter value is ABOVE the Dex. If it is under, the Dex will go to your value or very close to it. Also note that the number displayed by the Dex right after you enter your hand meter number is NOT the number that it will eventually display on your track, it is an intermediate value with no practical signficance. --- _[View the full topic](https://forum.fudiabetes.org/t/quick-dex-g5-question/3054)._