Important! - Read and follow the instructions below even if you are not using this kit with an AAG anemometer.
Refer to the layout diagram for clarification of parts placement. All references to up, down, left, and right assume that you are looking at the PCB with the silkscreen TAPR logo at the lower right-hand side of the board. All components are mounted on the top of the PC board.
The external 5V jumper, located at JMP3, determines which lines are used to supply 5V to the X1W-2. When AAG released "Version 3.0" of their anemometer they changed the lead in the 1-Wire cable that carries the 5V supply. The wire they switched to will cause a direct short to ground for the supply line if using previous versions of the T-238, X1W-2 (original release) and the betas of the X1W-1 and X1W-2 (rev 2). The addition of another position for JMP3 solves this problem.
Before proceeding, a note on 1-Wire cables. The 1-Wire cable is a straight-through cable. Some telephone cables reverse the wires and some do not. In addition, most telephone cord couplers reverse the wires. Find a telephone cable that does not reverse the wires or make your own. To check the cable, hold the connectors side-by-side and oriented the same direction (e.g., clip tab down on both connectors). Observing the colored wires check that the same color wire goes to the same position on both connectors.
Also note that the cable shipped with the AAG anemometer is cannot be used in any of the tests or operation. This cable only uses two conductors and is not compatible with the X1W or T-238 kits.
If you have "Version 3.0" of the anemometer, then P and 2 should be jumped. If you have an older model or you are not using the AAG 1-Wire anemometer, then jump P and 1. The following procedure will verify the jumper position prior to soldering it permanently. If you do not have an AAG anemometer, you can skip this section and proceed with soldering the jumper by clicking here.
|Connect the X1W-1 with two prepared 1-Wire cables to the T-238/T-238+ and/or the X1W-1 looping through the AAG anemometer.|
|Apply power to the T-238/T-238+ and/or the X1W-1.|
|Connect the common (negative) lead of a voltmeter to the anode (opposite the banded end) of D2. This diode is located behind the left-hand RJ11 jack for the 1-Wire loop-through.|
|Set the voltmeter up to read a 5V DC signal and touch the positive lead to the pad marked '2' at JMP3. You should read a value very close to 5V.|
If you found the voltage at '2', then proceed with soldering in the jumper below. If not (and you are using the X1W-1), the push-on shunt at P1 on the X1W-1 is either in the wrong position or missing. If you are not using the X1W-1 and the voltage is missing, conduct the above test again, but look at the pad marked '1'. In either case, 'P' should be jumped to the numbered pad that has the 5V supply present.
Solder a jumper made from a clipped component lead in the position as determined above at JMP3.
|P to 2 if AAG Ver 3.0 anemometer attached|
|P to 1 if earlier or no AAG anemometer attached|