Pressure Transducer Installation
1-Wire Indoor Sensor/Interface Kit

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 oriented up on the board. Unless noted otherwise, all components are mounted on the top of the PC board.

The last component to install is not only the largest, it is the most expensive component in the kit. Take your time and be careful. Read through the following instructions carefully before attempting to install the device.

As an overview of installing the sensor, the leads must be so formed that they extend straight out from the sensor body for about 1/8”, followed by two 45 degree bends. Properly done, this will form a right-angle entry of the sensor leads into the solder pads on the PC board. At present, the mounting holes are not used as a suitable means of mounting the sensor is not readily available. However, you may want to try and get the holes to line up in the event an easy mount is developed in the future. Be very careful that the leads are not stressed where they come out of the sensor body.

Successfully completing this procedure requires previous kit building experience. If you are new to building kits or have built very few prior to this, the sensor may be mounted vertically on the board. Just be careful not to accidently stress the leads while performing the calibration or installation. If you choose this option, simply push the leads through the solder pad holes so they extend about 1/16” below the bottom of the board and solder the pins. The flat side of the sensor should face the right-hand side of the board.

The MPX4115AP is located at U8, the lower right-hand corner of the board.

  With a pair of very slender needle-nose pliers, grasp three of the transducer leads at one end of the housing so that the side towards the lead ends is parallel with the solder pads for the sensor beneath. Place the pliers as close as possible to the body while still maintaining the parallel alignment.
  Using a second pair of needle nose pliers, gently bend each transducer lead down to form a 45 degree angle. Be careful not to stress the leads where they come out of the transducer body.
  In like manner, do the opposite side.
  Repeat the same process again, but this time position the edge of the pliers nearest the pin ends, about 1/8” from the first bend. The correct position for the bend is where the lead narrows.
  Bend the leads another 45 degrees, for a total of 90 degrees (right angle).
  Check alignment by inserting the leads into the solder pads. If necessary, tweak the bends. When properly formed, there will be approximately 1/16” extending from the bottom solder pads on the board. Remember, don't stress the leads at the transducer body.
  When alignment is good, solder six pins to the board.