Measurement Specialties 9116 user manual 6.1 DH200 Pressure Transducer O-Ring Replacement

Pressure Systems, Inc. Model 9116 User’s Manual

5.1.6.1DH200 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.

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