What is Jog Mode on the Miller 350P and when does it activate?

Jog Mode activates when the gun trigger is pressed and held for more than 3 seconds without striking an arc. In this mode, weld power automatically shuts off and the displays will show JOG MODE. For MIG guns, shielding gas will shut off after 1 minute and wire will feed for up to 2 minutes before the wire drive system automatically shuts off. (Page 23)