pm200 slotPM200 gauge mode modules support absolute mode measurement when used with a barometric reference module. Instrumental uncertainty for gauge mode modules used in absolute modeslot in the PCB. (_) Secure the PCB on the rht side with 2 or 3 of the 32x38 screws, washers and nuts. #6-Thten enough to hold the PCB. They will be thtened later. (_) Reinstall