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Pressure Systems, Inc. 98RK-1 & 9816 User’s Manual©
Page 126 www.PressureSystems.com
5.1.6.3 Adapter Plate O-Ring Replacement
Following is a step-by-step procedure to replace an adapter plate O-ring in a Model 9816
Intelligent Pressure Scanner. The adapter plate is located opposite the tubing plate on the
calibration manifold. All DH200 transducers are attached to the adapter plate.
(1) Disassemble the module as described in Section 5.1.2.
(2) Remove the PC-206 Amplifier/Multiplexer board as described in Section 5.1.3.1. Lay
the circuit board to the side on an anti-static surface.
(3) Remove the six (6) 3/32" Allen-head screws that secure the adapter plate to the
calibration valve housing. To remove the two (2) center screws, you must remove the
DH200 transducers near the screws. Make sure to note the DH200 serial number and
location.
(4) Carefully rotate or slide the adapter plate back and forth, pivoting on the guiding pin
about 1/8" several times. This is done to loosen the O-rings from the calibration manifold.
Lift the adapter plate straight up. Do not touch the calibration manifold.
(5) Remove and replace the O-rings needing maintenance using the procedure described in
Section 5.1.6.1. Note that the O-ring seals use an additional Teflon cup seal placed on
top of the O-ring. These Teflon seals do not require Krytox
®
grease.
(6) Examine the adapter plate and calibration valve surface to verify that no contaminants
are on either surface. This generally requires microscopic examination. Replace the
adapter plate by slowly placing the plate on the calibration manifold housing. Make sure
that the O-ring is down toward the pneumatic sliding manifold and the guiding pin on the
adapter plate fits into the mating hole of the calibration valve housing. Fasten the
adapter plate evenly on all sides.
(7) Install the DH200 transducers that were previously removed. It is suggested to install
them back in their original location.
(8) Replace the PC-206 board as described in Section 5.1.3.1 and reassemble the module.
(9) Test your scanner to ensure proper operation.