Emerson Daniel 3818 Installation Manual page 17

Lng liquid ultrasonic meter for cryogenic liquefied natural gas applications
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Installation manual
3-9000-771
Figure 1-2: 3818 LNG Meter with remote mount electronics and band shroud
assembly
A. Explosion-proof transmitter enclosure (CPU Module, Power Supply, I.S. Barrier Board,
and Backplane Bd.)
B. Bracket cover with synchronization cable
C. Intrinsically-safe base enclosure includes Acquisition Module
D. Rigid and flexible conduit for transducer cables
E. Meter - body and shroud cover for transducers and cables assemblies
Computer simulations of various velocity profiles demonstrate that eight measurement
paths provide an optimum solution for measuring asymmetric flow. The Daniel 3818 LNG
Liquid Ultrasonic Flow Meter utilizes eight cross-bore, parallel-plane measurement paths
to offer a high degree of accuracy, repeatability, and superior low-flow capabilities without
the compromises associated with conventional technologies. The meter is comprised of
two 3810 Transmitter Electronics, designated as co-located primary (master) and
secondary (slave) electronics. A synchronization cable connects the primary and
secondary Acquisition Modules at the J6 terminal block and the liquid ultrasonic flow
meter firmware controls the transducers firing sequencing. The Daniel 3818 LNG Liquid
Ultrasonic Flow Meter with the 30" diameter meter body utilizes 60 degree port angles
with LT-07 transducers.
These features make the Daniel 3818 LNG Liquid Ultrasonic Flow Meter the best choice for
cryogenic custody transfer applications as shown in the following sections of this manual.
Installation manual
Introduction
May 2019
17

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