Pressure Systems, Inc. Model 9116 User’s Manual
Page 112
www.PressureSystems.com
5.1.6.1
DH200 Pressure Transducer O-Ring Replacement
Please note that the DH200 O-rings are used for static seals only. They will typically not require
replacement unless exposed to improper liquid media (which will also damage other 9116
components). Following is a step-by-step procedure to replace a DH200 O-Ring should it be
required:
(1) Disassemble the module as described in
Section 5.1.2
.
(2) Remove the PC-327 Analog board as described in
Section 5.1.3.1
. Lay the circuit board
aside on an anti-static surface.
(3) Remove the DH200 transducer(s) as described in
Section 5.1.4
. If more than one DH200
is removed, it is recommended to record their serial numbers prior to removal to ensure
they are reinstalled in the same locations.
(4) Using tweezers, remove the two (2) O-rings from the
DH200. Clean the O-ring cup with a lint-free
applicator moistened with a cleaning fluid such as
acetone, alcohol, Freon
®
, or any other substance
that evaporates quickly and leaves very little
residue. Remove any excess cleaner with the air
supply as soon as possible. Do not blow air directly
into the holes of the surface since that can drive the
fluid into the transducer and/or rupture the silicon
pressure transducer.
Figure 5.6
DH200 Transducer O-Ring Replacement
(5) With clean hands, apply a small amount of Krytox
®
fluorinated grease to the palm of one
hand and rub it out evenly with your index finger. Place one new O-ring onto your greased
palm. Work the O-ring around until it is evenly greased. The O-ring should shine when
properly lubricated. There should be no white area of excess grease on the O-ring. Make
sure there is only a thin film of lubrication on the O-ring. Using your greased finger, place
the greased O-rings in the cups on the DH200. Ensure that no grease enters the hole that
leads into the transducer.
(6) Reinstall the DH200 as described in
Section 5.1.4
.
(7) Repeat steps 3, 4, 5 and 6 for each set of O-rings in need of replacement.
(8) Replace the PC-327 Analog board as described in
Section 5.1.3.1
and reassemble the
module.
(9) Test your scanner to ensure proper operation.
