Section 1: Introduction

Daniel 3818 LNG Liquid Ultrasonic Meter Installation Manual

May 2012

3-9000-771 Rev A

 

 

1.53818 LNG Liquid Ultrasonic Flow Meter design

The Daniel 3818 LNG Liquid Ultrasonic Flow Meter is a remote mount, dual transmitter electronics, eight-path (sixteen transducers) in-line meter designed to measure the difference in signal transit time with and against the flow across one or more measurement path(s). A signal transmitted with the direction of flow travels faster than one transmitted against the flow direction. Each measurement path is defined by a transducer pair in which each transducer alternately acts as transmitter and receiver. The meter uses transit time measurements and transducer location information to calculate the mean velocity.

Figure 1-2 3818 LNG Meter with remote mount electronics and band shroud assembly

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A.Explosion-proof transmitter enclosure(CPU Module, Power Supply, I.S. Barrier Board, and Backplane Bd.)B.Bracket cover with synchronization cableC.Intrinsically-safe base enclosure includes Acquisition ModuleD.Rigid and flexible conduit for transducer cablesE.Meter - body and shroud cover for transducers and cables assemblies

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3818 LNG Liquid Ultrasonic Flow Meter design