The board is now ready to mount in the enclosure you selected at the beginning of the assembly. This is necessary to provide a stable foundation while performing the barometer calibration procedure. As you mount the board be sure you have adequate clearances for the DB9, RJ11, RCA phono jacks as well as the two-pin header connections for the aspirator and rain gauge heater controls. Last, but not least, be sure you can easily access the chimney port on the pressure transducer. In the steps that follow, a vinyl tube will have to be attached to this port.