Pressure Systems 9022 User Manual
Page 144
Pressure Systems, Inc.
NetScanner™ System (9016, 9021, & 9022) User’s Manual
www.PressureSystems.com
5 - 10
(2)
Notice from the above figures (Figure 5.3a and 5.3b) that the three PC boards (315, 316
or 339, and 317) are held together by standoffs and gold connector pins. If there is a need
to take the boards apart, ensure that the gold connector pins do not get bent.
(3)
Carefully remove the ribbon connection from the PC-317 to the PC-280 Microprocessor
board. Remove the six (6) 4-40 Phillips-head screws from the standoffs. Gently remove
the PC-317 board by pulling straight up on the gold connector pins. If the PC-317
multiplexer board is suspected of malfunctioning, it must be returned to the factory, since
there are no field replaceable parts on the board.
(4)
Unscrew the standoffs between the PC-316 (or PC-339) and PC-315 boards and gently
remove the PC-316 (or PC-339) board by pulling straight up on the gold connector pins.
If the PC-316 (or PC-339) Signal Conditioning board is suspected of malfunctioning, it
must be returned to the factory, since there are no field replaceable parts on the board.
(5)
The PC-315 Connector Interface board is soldered to the top plate and cannot be removed
in the field. If the PC-315 board is suspected of malfunctioning, the entire top plate must
be returned to the factory.
(6)
After replacing malfunctioning printed circuit boards, reassemble the module in reverse
order from that used in taking it apart. Ensure the ribbon connection from the PC-317
board to the PC-280 Microprocessor board is connected properly and that it is not
crimped. Pin 1 of the ribbon cable has a red stripe while pin 1 on the PC-280
connector will contain a square solder pad.
(7)
Carefully replace the Viton gasket around the top plate and replace the twelve (12)
Phillips-head screws that secure the top plate to the scanner housing. Tighten the screws.
Do not over-tighten; 7-9 inch-pounds should be sufficient.
(8)
Test your scanner to ensure proper operation.
5.1.4 Replacement of Transducers
Model 9016 has internal DH200 pneumatic transducers, as well as an internal calibration
manifold with associated valves and O-rings. All these elements occasionally require service or
replacement as described in the following sections.
Following is a step-by-step procedure to replace a DH200 transducer in a Model 9016 Intelligent
Pressure Scanner. Use the tools and follow the general warnings already described in Section
5.1.1.