Typically pressure gauges read in PSI and will read 0 PSI at atmospheric pressure. This is also called gauge pressure. I assume the pressure gauge on your tire changer reads in PSI and reads 0 without compressed air supplied to it. If this is true, you will want to set the regulator for 116 PSI gauge pressure.
There are pressure gauges which read absolute pressure in PSIA and will read 14.7 PSIA at atmospheric pressure. At 8 bar pressure absolute an absolute pressure gauage should read 116 PSIA (absolute pressure). I think the chart was trying to show 8 bar pressure absolute is 101 PSI (gauge pressure).
If the instructions want you to set an absolute pressure they should specify "absolute"; otherwise it is 8 bar x 14.5 PSI = 116 PSI.
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