FIELDVUE Instrumentation Issues Steve Hagen FIELDVUE Product Marketing Manager

[File Name or Event] Emerson Confidential 27-Jun-01, Slide 2 Slide 2 DVC Customer Issues Severe service valve applications Feedback linkage failure on critical valves High temperature applications Dirt or desiccant in air Moisture in air Potentiometer wear

[File Name or Event] Emerson Confidential 27-Jun-01, Slide 3 Slide 3 O-rings hardened or out of place Air escaping past o-rings due to various reasons. Leaking around any pressure-containing component (I/P, Relay, PWB pressure sensors, housing/module base). Causes the DVC6000 to be sluggish and less responsive to input signal changes.

[File Name or Event] Emerson Confidential 27-Jun-01, Slide 4 Slide 4 Moisture invasion Moisture in the supply air can destroy EVERY DVC6000 component. Can make a “gurgling” sound while operating.

[File Name or Event] Emerson Confidential 27-Jun-01, Slide 5 Slide 5 Dirt in the Supply Air #1 “Killer” of an I/P Converter May sound like intermittent air output

[File Name or Event] Emerson Confidential 27-Jun-01, Slide 6 Slide 6 Travel Sensor DVC Travel Sensor: Provides travel reading from the actuator to pwb. Out of 360 o rotation, only 90 o is valid for travel readings (with ~15° “slop” on either side). All of the Travel Sensor Calibration routines direct you to locate the feedback arm rotation from “A” to “B” within this 90 o valid window. Anything outside this arc is invalid A A B 90 o valid travel range “A” position “B” position 90 o valid travel range invalid travel area 0 Ω 12K Ω CW20°150°170°360° CCW 45K Ω ”A””B”