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 sensor looks like a transistor. Be sure to the orient the device so that the flat side of the body lines up with the silk-screen layout (faces the RH side of the board).
|Install a DS18S20 temperature sensor at U1.|
|Solder all three leads and clip the excess length.|
The board features a jumper that allows powering the temperature sensor from the 1-Wire bus or from an external 5V supply. For short 1-Wire cable runs, power from the bus provides adequate operation and is preferable. If there is a long run to the X1W-2, it may be advisable to use external power. Understand that external power will cause some self-heating to occur that may bias the temperature readings.
In the following, solder the jumper in the position that best suits your needs as determined from the discussion above.
|P to I to power from 1-Wire bus|
|P to X to power from external 5V supply|
U4, the HIH-4000-001 humidity sensor faces the LH side of the board. A recessed area identifies
the front of the sensor with the actual sensor in the lower RH corner. The bottom of the recessed
area appears to have an epoxy that has been applied to hold the sensor in place. Be sure you
have correctly identified the front before soldering. To facillitate identifying the front of
the sensor download the product spec from Honeywell
|Remove the HIH-4000-001 from the anti-static carrier and insert in the board with the front facing the side of the board at U4. Note that the leads are already formed correctly. Guide the leads through the mounting holes. Do not stress the leads by trying to pull the sensor down more than the formed leads allow.|
|Double-check alignment of the sensor. If installed backwards, reverse polority will likely destroy the device, even if power is applied only for an instant.|
|Solder all three leads and clip the excess length on the bottom of the board.|