Taylor-Wharton LP3 - Manual (Page 13)

Instrumentation Circuits
The instrumentation consists of a pressure gauge and differential pressure gauge. The pressure gauge (PI-1)
displays the inner vessel pressure in pounds-per-square-inch and kilopascals. The differential pressure gauge
measures the difference in pressure between the top and bottom of the vessel. Product within the vessel
creates a higher pressure at the bottom of the vessel than at the top. Readings on the differential pressure
gauge are in inches of water. This reading, when compared to the contents chart attached to the front of the
vessel, allows accurate monitoring of the amount of product within the vessel.
LI-1
PI-1
Figure 8: Instrumentation circuits highlighted in blue.
(Frame omitted from view for clarity.)
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