User Manual

Daniel 3814 Liquid Ultrasonic Meter Installation Manual Section 1: Introduction
3-9000-760 Rev E March 2015
3814 liquid ultrasonic meter design 9
Figure 1-3 Transmitter electronics enclosure with optional local display and glass endcap
The Daniel 3814 Liquid Ultrasonic Flow Meter is a four-path (eight 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 in the flow direction 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.
Computer simulations of various velocity profiles demonstrate that multiple measurement
paths provide an optimum solution for measuring asymmetric flow. The Daniel 3814 Liquid
Ultrasonic Flow Meter utilizes four cross-bore, parallel-plane measurement paths, offers a high
degree of repeatability, bi-directional measurement and superior flow capabilities for custody
transfer without the compromises associated with conventional technologies.
The Daniel 3814 Liquid Ultrasonic Flow Meter’s U.L. safety listing is accomplished through the
combination of an explosion-proof Transmitter Electronics Enclosure that houses the CPU
Module, Power Supply board, I.S. Barrier board, Backplane board and optional LCD Display
board.
NOTE: The optional LCD Display requires firmware v1.04 or later and Uboot version, January 31,
2013.
The Base Electronics Enclosure is intrinsically safe and houses the Acquisition Module, the
acquisition cable and wiring. The Intrinsically safe transducers and cable assemblies are
designed for Class 1, Division 1, Groups C and D areas without need of further protection when
installed in accordance with the field wiring diagram (refer to Daniel drawing DMC - 004936,
The Daniel 3814 Liquid Ultrasonic Flow Meter’s U.L. safety listing is accomplished through the
combination of an explosion-proof Transmitter Electronics Enclosure that houses the CPU
Module, the Base Electronics Enclosure that houses the Acquisition Module with intrinsically
safe transducers and cable assemblies designed for Class 1, Division 1, Groups C and D areas
without need of further protection when installed in accordance with the field wiring diagram
(refer to Daniel drawing DMC -004936, see Appendix A) and Section 1.8.