For the location of the jumpers listed below, see the labeled picture of the completed board.
1-Wire Device Enables (JMP1)
Each of the 1-Wire devices on the board has an enabling jumper. These are used for troubleshooting and also for identification purposes during setup, if needed.
1-Wire Pull-Up (P18)
If the T-238/T-238+ is used, this jumper must be left open. Otherwise, be certain it is in place. Essentially this helps noise immunity when longer lines are used to the external 1-Wire Devices.
External 5V Supply Line (P1)
If the T-238/T-238+ is used, this jumper must be left open. If the X1W-2 outdoor board is used along with the X1W-1 RS-232 interface (i.e., the T-238/T-238+ is not connnected), this jumper must be in place. Otherwise, its use is optional. The purpose of the jumper is to supply external 5V power to other boards. Normal jump is P-1. If the AAG anemometer "3.0" is used, then P-2 must be jumped.
This jumper connects the pressure transducer output to the input of the signal conditioning circuitry. This jumper should normally be left in place. The primary purpose of the jumper is to allow a trouble-shooting point where a DC signal can be applied to the input of the circuit for testing.
This jumper is primarily for calibration. However, if removed completely, a small DC voltage can be applied to Vad for trouble-shooting and testing purposes. The normal position for operation is Vad-Op.