Measurement Specialties 9116 - Manual (Page 115)

Pressure Systems, Inc. Model 9116 User’s Manual
Page 106 www.PressureSystems.com
5.1.3.1 PC-327 Analog Board
The following procedures should be used for replacement of the PC-327 Analog Board. Use
the tools and follow the general precautions described in Section 5.1.1.
(1) Disassemble the module as described in Section 5.1.2. Carefully remove the wiring
harness from connector P1 of the PC-327 board. Note the orientation of the PC-327
relative to the rest of the module to ensure the new PC-327 is installed in the same position.
(2) Remove the two (2) Phillips-head screws securing the PC-327 board to the DH200
transducers. Carefully disconnect the PC-327 board from the DH200s by slowly working
the board off; starting at one end and moving down the length of the board. It is important
that the gold pins are not bent when removing the board.
(3) Replace the old PC-327 board with a new one by placing it loosely on top of the DH200s.
Ensure the board end containing connector P1 is oriented the same as the board just
removed. Inspect and make sure that all the gold pins fit easily into the female end of the
connector on the DH200 transducers. Press the board down evenly until all pins are firmly
seated.
(4) Install the two (2) Phillips-head screws to secure the PC-327 to the DH200s. Be careful not
to over-tighten. Install the wiring harness to connector P1 of the PC-327, ensuring proper
pin 1 location. (Pin 1 of the ribbon cable has a red stripe while pin one of P1 will
contain a square solder pad on the PC-327.)
(5) Carefully align the gasket on the top plate, ensuring it is free of contaminants. Re-install
the module electronics into the extrusion case. Ensure that the alignment posts in the
module's bottom panel align with the PC-327 or PC-322 electronics support brackets when
placing the top panel and electronics back into the housing.
(6) Replace the screws that secure the top panel to the scanner housing and tighten. Do not
over- tighten; 7-9 inch-pounds torque should be sufficient.
(7) Test your scanner to ensure proper operation.
5.1.3.2
PC-322/323 Main Board/PowerPC Daughter Board Assembly
The following procedures should be used for replacement of the PC-322/323 Main
Board/PowerPC Daughter board assembly. Use the tools and follow the general warnings
already described in Section 5.1.1.
(1) Disassemble the module as described in Section 5.1.2.
(2) Carefully remove any attached wiring harnesses from connectors P3 and P6 of the PC-
322/323 board assembly. This will require cutting one nylon tie-wrap attached to the center
mounting bracket. The wiring harness from P1 will be disconnected in the following step.