GE DigitalFlow XMT868i User guide

GE
Measurement & Control Flow
910-171U Rev. H
February 2017
DigitalFlow™ XMT868i
Ultrasonic Flow Transmitter for Liquids
(1 & 2-Channel)
Startup Guide

www.gemeasurement.com
©2016 General Electric Company. All rights reserved.
Technical content subject to change without notice.
DigitalFlow™ XMT868i
Ultrasonic Flow Transmitter for Liquids
(1 & 2-Channel)
Startup Guide
910-171U Rev. H
February 2017

ii
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DigitalFlow™ XMT868i Startup Guide iii
Preface
Information Paragraphs
Note: These paragraphs provide information that provides a deeper understanding of the situation, but is not
essential to the proper completion of the instructions.
IMPORTANT: These paragraphs provide information that emphasizes instructions that are essential to proper
setup of the equipment. Failure to follow these instructions carefully may cause unreliable
performance.
Safety Issues
Auxiliary Equipment
Local Safety Standards
The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.
Working Area
CAUTION! This symbol indicates a risk of potential minor personal injury and/or severe damage
to the equipment, unless these instructions are followed carefully.
WARNING! This symbol indicates a risk of potential serious personal injury, unless these
instructions are followed carefully.
WARNING! It is the responsibility of the user to make sure all local, county, state and national
codes, regulations, rules and laws related to safety and safe operating conditions are met for each
installation. The safety of any system incorporating the equipment is the responsibility of the
assembler of the system.
WARNING! Auxiliary equipment may have both manual and automatic modes of operation. As
equipment can move suddenly and without warning, do not enter the work cell of this equipment
during automatic operation, and do not enter the work envelope of this equipment during manual
operation. If you do, serious injury can result.
WARNING! Make sure that power to the auxiliary equipment is turned OFF and locked out before
you perform maintenance procedures on the equipment.

Preface
iv DigitalFlow™ XMT868i Startup Guide
Qualification of Personnel
Make sure that all personnel have manufacturer-approved training applicable to the auxiliary equipment.
Personal Safety Equipment
Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary
equipment. Examples include safety glasses, protective headgear, safety shoes, etc.
Unauthorized Operation
Make sure that unauthorized personnel cannot gain access to the operation of the equipment.
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
GE Measurement & Control is an active participant in Europe’s Waste Electrical and Electronic Equipment
(WEEE) take-back initiative, directive 2012/19/EU.
The equipment that you bought has required the extraction and use of natural resources for its production. It
may contain hazardous substances that could impact health and the environment.
In order to avoid the dissemination of those substances in our environment and to diminish the pressure on
the natural resources, we encourage you to use the appropriate take-back systems. Those systems will reuse or
recycle most of the materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use those systems.
If you need more information on the collection, reuse and recycling systems, please contact your local or
regional waste administration.
Visit www.gemeasurement.com/environmental-health-safety-ehs for take-back instructions and more
information about this initiative.

DigitalFlow™ XMT868i Startup Guide v
Contents
Chapter 1. Installation
1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.3 Site Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.3.1 Electronics Enclosure Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.3.2 Flowcell Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.3.3 Transducer Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3.4 Cable Lengths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.3.5 Transducer Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.4 Installing a Flowcell. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.5 Installing Temperature Transmitters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.6 Mounting the XMT868i Electronics Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.7 Making Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.7.1 Wiring the Line Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.7.2 Wiring Transducers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.7.3 Wiring Standard 0/4-20 mA Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.7.4 Wiring the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.7.5 Wiring Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Chapter 2. Initial Setup
2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
2.2 XMT868i Enclosure Keypad Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
2.3 Entering Data in the Global Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2.3.1 Entering Global System Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
2.4 Entering Data in the Channel Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.4.1 Selecting the Channel Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.4.2 Entering Data in the Channel System Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
2.4.3 Entering Pipe Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Chapter 3. Operation
3.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
3.2 Powering Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
3.3 The LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
3.4 The Optional PanaView Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
3.5 Taking Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3.5.1 Programming the LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
3.5.2 Using the LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
3.5.3 PanaView Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
3.5.4 Pausing Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Contents
vi DigitalFlow™ XMT868i Startup Guide
Chapter 4. Specifications
4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
4.1.1 Hardware Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
4.1.2 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
4.1.3 Flow Accuracy (Velocity) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.1.4 Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.1.5 Rangeability (Overall) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.1.6 Repeatability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.1.7 Energy Accuracy (% of Reading) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.1.8 Fluid Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
4.2 Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
4.2.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
4.2.2 Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
4.2.3 European Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
4.2.4 Input/Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
4.2.5 Additional Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
4.3 Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
4.3.1 Wetted Transducers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
4.3.2 Clamp-On Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
4.3.3 Transducer Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
4.3.4 Temperature Transducers (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
4.4 Pipe Size and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
4.4.1 Wetted Transducers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
4.4.2 Clamp-on Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
4.5 Flowcell. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
4.5.1 Tilted Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Appendix A. CE Mark Compliance
A.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
A.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Appendix B. Data Records
B.1 Available Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
B.2 Option Cards Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
B.3 Site Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Appendix C. Measuring P and L Dimensions
C.1 Measuring P and L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

DigitalFlow™ XMT868i Startup Guide 1
Chapter 1. Installation
Chapter 1. Installation
1.1 Introduction
To ensure safe and reliable operation of the Model XMT868i Flow Meter, the system must be installed in accordance
with the guidelines established by GE engineers. Those guidelines, explained in detail in this chapter, include the
following topics:
•Unpacking the Model XMT868i system
•Selecting suitable sites for the electronics enclosure and the flowcell/transducers
•Installing the flowcell/transducers
Note: See the appropriate Transducer Installation Guide for detailed instructions on transducer installation.
•Installing optional temperature transmitters
•Installing the electronics enclosure
•Wiring the electronics enclosure
1.2 Unpacking
Carefully remove the electronics enclosure, the transducers, and the cables from the shipping containers. Before
discarding any of the packing materials, account for all components and documentation listed on the packing slip. The
discarding of an important item along with the packing materials is all too common. If anything is missing or damaged,
contact the factory immediately for assistance.
WARNING! The Model XMT868i flow transmitter can measure the flow rate of many fluids, some
potentially hazardous. The importance of proper safety practices cannot be overemphasized.
WARNING! Be sure to follow all applicable local safety codes and regulations for installing
electrical equipment and working with hazardous fluids or flow conditions. Consult company
safety personnel or local safety authorities to verify the safety of any procedure or practice.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.

Chapter 1. Installation
2DigitalFlow™ XMT868i Startup Guide
1.3 Site Considerations
Because the relative location of the flowcell and the electronics enclosure is important, use the guidelines in this
section to plan the XMT868i installation. Figure 1 below shows a typical installation.
Figure 1: A Typical Model XMT868i System
1.3.1 Electronics Enclosure Location
The standard Model XMT868i electronics enclosure is a powder-coated, cast-aluminum, Type-7/4X explosion-proof
enclosure, and an optional stainless-steel enclosure is available. Typically, the enclosure is mounted as close as possible
to the transducers. When choosing a site, make sure the location permits easy access to the electronics enclosure for
programming, maintenance and service.
Note: For compliance with the European Union’s Low Voltage Directive, this unit requires an external power
disconnect device such as a switch or circuit breaker. The disconnect device must be marked as such, clearly
visible, directly accessible, and located within 1.8 m (6 ft) of the unit.
1.3.2 Flowcell Location
Ideally, choose a section of pipe with unlimited access; for example, a long stretch of pipe that is above ground.
However, if the flowcell is to be mounted on an underground pipe, dig a pit around the pipe to facilitate installation of
the transducers.

DigitalFlow™ XMT868i Startup Guide 3
Chapter 1. Installation
1.3.3 Transducer Location
For a given fluid and pipe, the Model XMT868i’s accuracy depends primarily on the location and alignment of the
transducers. In addition to accessibility, when planning for transducer location, adhere to the following guidelines:
•Locate the transducers so that there are at least 10 pipe diameters of straight, undisturbed flow upstream and
5 pipe diameters of straight, undisturbed flow downstream from the measurement point. Undisturbed flow
means avoiding sources of turbulence in the fluid such as valves, flanges, expansions, and elbows; avoiding
swirl; and avoiding cavitation.
•Locate the transducers on a common axial plane along the pipe. Locate the transducers on the side of the pipe,
rather than the top or bottom, since the top of the pipe tends to accumulate gas and the bottom tends to
accumulate sediment. Either condition will cause increased attenuation of the ultrasonic signal. There is no
similar restriction with vertical pipes. However, vertical pipes should be avoided in order to insure a full pipe at
the measurement point.
1.3.4 Cable Lengths
Locate the electronics enclosure as close as possible to the flowcell/transducers, preferably directly on the flowcell.
However, GE can supply transducer cables up to 1,000 ft (300 m) in length for remote location of the electronics
enclosure. If longer cables are required, consult the factory for assistance.
1.3.5 Transducer Cables
When installing the transducer cables, always observe established standard practices for the installation of electrical
cables. Do not route transducer cables alongside high amperage AC power lines or any other cables that could cause
electrical interference. Also, protect the transducer cables and connections from the weather and corrosive
atmospheres.
Note: If you are using your own cables to connect the transducers to the electronics console, they must have
electrical characteristics identical to the cables supplied by GE. For transducer frequencies up to 2 MHz, the
cables in each pair must be the same length within ±4 in. (10 cm). For transducer frequencies above 2 MHz,
the cables in each pair must be the same length within ±0.5 in. (1.25 cm).
1.4 Installing a Flowcell
A flowcell is the section of pipe where the transducers are mounted. It can be created either by mounting the
transducers on the existing pipeline or by mounting them on a spoolpiece. A spoolpiece is a separately manufactured
pipe section, matched to the existing pipe, which contains ports for mounting the transducers. This approach allows the
transducers to be aligned and calibrated before inserting the spoolpiece into the pipeline.
Figure 1 on page 2 shows a typical Model XMT868i spoolpiece, with a mounting bracket to hold the electronics
enclosure. For detailed instructions on installing the transducers and/or spoolpiece, refer to the supplied drawings and
the appropriate Transducer Installation Guide.

Chapter 1. Installation
4DigitalFlow™ XMT868i Startup Guide
1.5 Installing Temperature Transmitters
Optional temperature transmitters may be installed as part of the flowcell, near the ultrasonic transducer ports. Be sure
to observe the siting requirements given earlier in this chapter. These transmitters should send a 0/4-20 mA signal to
the Model XMT868i. In turn, the XMT868i must be fitted with a suitable option card to process the signals and to
provide the required 24 VDC power to the transmitters. Any desired transmitters or sensors may be used, but they must
have an accuracy equal to 0.5% of the reading or better.
Note: Resistive Thermal Devices (RTDs) are a good choice for measuring the temperature.
Typically, a 1/2” NPT female threaded port is used to mount the transmitters on the flowcell. If the pipeline is insulated,
the coupling may need to be extended to provide convenient access. Of course, other types of mounting ports,
including flanged ports, may be used for the transmitters.
Figure 2 below shows a typical mounting arrangement for a temperature transmitter. The temperature transmitter
should protrude 1/4 to 1/2 way into the pipe.
Figure 2: Typical Temperature Transmitter Mounting
Transmitter
RTD
Coupling
Thermowell
Flowcell Wall
Temperature

DigitalFlow™ XMT868i Startup Guide 5
Chapter 1. Installation
1.6 Mounting the XMT868i Electronics Enclosure
The standard model XMT868i electronics package is housed in a Type-4X weather-resistant enclosure suitable for
indoor or outdoor use. Refer to Figure 8 on page 21 for the mounting dimensions and the weight of this enclosure.
The Model XMT868i electronics enclosure is fitted with a mounting boss that has a single 3/4” NPTF threaded hole at
its center and four 1/4-20 tapped holes at its corners. By using this mounting boss, the electronics enclosure may be
mounted by any of the typical techniques shown in Figure 9 on page 22.
1.7 Making Electrical Connections
This section contains instructions for making all the necessary electrical connections to the Model XMT868i flow
transmitter. Refer to Figure 10 on page 23 for a complete wiring diagram.
Except for the power connector, all electrical connectors are stored on their terminal blocks during shipment and may
be removed for more convenient wiring. Simply, feed the cables through the conduit holes on the side of the enclosure,
attach the wires to the appropriate connectors and plug the connectors back into their terminal blocks.
Refer to Figure 3 on page 6 and prepare the Model XMT868i for wiring by completing the following steps:
1. Disconnect any previously wired power line from the unit.
2. Loosen the set screw on the rear cover.
3. Place a rod or long screwdriver across the cover in the slots provided, and rotate the cover counterclockwise
until it comes free from the enclosure.
4. Install any required cable glands in the appropriate conduit holes around the side of the enclosure.
5. Note the labels inside the rear cover to assist in wiring the power and option card connections. Also, Figure 11
on page 24 shows the rear cover option card labels for every available option card configuration.
Proceed to the appropriate section of this chapter to make the desired wiring connections.
WARNING! Proper grounding of the XMT868i chassis is required to prevent the possibility of
electric shock. See Figure 9 on page 22 to locate the chassis grounding screw.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
WARNING! Always disconnect the line power from the Model XMT868i before removing either
the front cover or the rear cover. This is especially important in a hazardous environment.
CAUTION! To ensure safe and reliable operation of the flow meter, be sure to install and tighten
all cable glands in accordance with the gland manufacturer’s instructions.

Chapter 1. Installation
6DigitalFlow™ XMT868i Startup Guide
1.7 Making Electrical Connections (cont.)
Figure 3: Rear Cover with Connection Labels
1.7.1 Wiring the Line Power
The Model XMT868i may be ordered for operation with power inputs of 100-120 VAC, 220-240 VAC, or 12-28 VDC.
The label on the side of the electronics enclosure lists the meter’s required line voltage and power rating. Be sure to
connect the meter only to the specified line voltage.
Note: For compliance with the European Union’s Low Voltage Directive, this unit requires an external power
disconnect device such as a switch or circuit breaker. The disconnect device must be marked as such, clearly
visible, directly accessible, and located within 1.8 m (6 ft) of the unit.
Note: Only use a Class 2 Rated Power supply for line power connection to a DC instrument.
Refer to Figure 10 on page 23 to locate terminal block TB5 and connect the line power as follows:
WARNING! Improper connection of the line power leads or connecting the meter to the incorrect
line voltage may damage the unit. It may also result in hazardous voltages at the flowcell and
associated piping as well as within the electronics enclosure.
Slots
Power Connections
Option Card Connections
Label Set Screw
Inside View Outside View

DigitalFlow™ XMT868i Startup Guide 7
Chapter 1. Installation
1.7.1 Wiring the Line Power (cont.)
1. Prepare the line power leads by trimming the line and neutral AC power leads (or the positive and negative DC
power leads) to a length 0.5 in. (1 cm) shorter than the ground lead. This ensures that the ground lead is the last
to detach if the power cable is forcibly disconnected from the meter.
2. Install a suitable cable clamp in the conduit hole indicated in Figure 10 on page 23. If possible, avoid using the
other conduit holes for this purpose, to minimize any interference in the circuitry from the AC power line.
3. Strip 1/4-in. of insulation from the end of each of the three line power leads.
4. Route the cable through the conduit hole and connect the line power leads to terminal block TB5, using the pin
number assignments shown in Figure 10 on page 23.
5. Leaving a bit of slack, secure the power line with the cable clamp.
Proceed to the next section to continue the initial wiring of the Model XMT868i flow transmitter.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
WARNING! Make sure both covers, with their O-ring seals, are installed and the set screws are
tightened before applying power in a hazardous environment.
CAUTION! The transducers must be properly wired before applying power to the meter.

Chapter 1. Installation
8DigitalFlow™ XMT868i Startup Guide
1.7.2 Wiring Transducers
Before wiring the XMT868i transducers, complete the following steps:
1. Disconnect the main power from the electronics enclosure.
2. Remove the rear cover and install all required cable clamps.
Note: For transducer frequencies below 2 MHz, the cable lengths must be within 4 in. (10 cm) of each other. If the
transducer frequency exceeds 2 MHz, the cable lengths must be within 0.5 in. (1.25 cm) of each other.
3. Locate the CH1 transducer cables and connect them to the two CH1 transducers in the flowcell. Feed the free
ends of the cables through the selected conduit hole in the electronics enclosure.
4. If an optional lightning protector is being installed, connect it between the meter and the transducers.
5. Refer to the wiring diagram in Figure 10 on page 23 and connect the transducer cables to terminal block J3.
Then, secure the cable clamp.
Note: The RED cable leads are the SIG(+) leads and the BLACK cable leads are the RTN(-) leads.
6. For a 2-Channel XMT868i, repeat the above steps to connect the CH2 transducers to terminal block J4. It is not
required that both channels of a 2-Channel unit be connected.
7. If wiring of the unit has been completed, reinstall the rear cover on the enclosure and tighten the set screw.
Note: A channel must be activated before it can begin taking measurements. See Chapter 2, Initial Setup, for
instructions.
WARNING! Before connecting the transducers, take them to a safe area and discharge any static
buildup by shorting the center conductor of the transducer cables to the metal shield on the cable
connector.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.

DigitalFlow™ XMT868i Startup Guide 9
Chapter 1. Installation
1.7.3 Wiring Standard 0/4-20 mA Analog Outputs
The standard configuration of the Model XMT868i flow transmitter includes two isolated 0/4-20 mA analog outputs
(designated as outputs 1 and 2). Connections to these outputs may be made with standard twisted-pair wiring, but the
current loop impedance for these circuits must not exceed 600 ohms.
To wire the analog outputs, complete the following steps:
1. Disconnect the main power to the unit and remove the rear cover.
2. Install the required cable clamp in the chosen conduit hole on the side of the electronics enclosure.
3. Refer to Figure 10 on page 23 for the location of terminal block J1 and wire the analog outputs as shown.
Secure the cable clamp.
Note: Analog outputs 1 and 2 in the wiring diagram correspond to analog outputs A and B in Slot 0 in the XMT868i
software.
4. If wiring of the unit has been completed, reinstall the rear cover on the enclosure and tighten the set screw.
Note: Prior to use, the analog outputs must be set up and calibrated. See Chapter 1, Calibration, of the Service
Manual for detailed instructions.
Proceed to the next section to continue the initial wiring of the unit.
1.7.4 Wiring the Serial Port
The Model XMT868i flow transmitter is equipped with a built-in serial communications port. The standard port is an
RS232 interface, but an optional RS485 interface is available upon request. Proceed to the appropriate sub-section for
wiring instructions. For more information on serial communications refer to the EIA-RS Serial Communications
manual (GE document 916-054).
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
WARNING! Make sure both covers, with their O-ring seals, are installed and the set screws are
tightened before applying power in a hazardous environment.

Chapter 1. Installation
10 DigitalFlow™ XMT868i Startup Guide
1.7.4a Wiring the RS232 Interface
Use the serial port to connect the Model XMT868i flow transmitter to a printer, an ANSI terminal or a personal
computer. The RS232 interface is wired as Data Terminal Equipment (DTE), and the signals available at terminal block
J1 are shown in Table 1 below. Refer to Figure 10 on page 23 and complete the following steps:
1. Disconnect the main power to the unit and remove the rear cover.
2. Install the required cable clamp in the chosen conduit hole on the side of the electronics enclosure.
3. Use the information in Table 1 to construct a suitable cable for connecting the Model XMT868i to the external
device. If desired, an appropriate cable may be purchased from GE.
Note: Signal names that imply direction (e.g., transmit and receive) are named from the point of view of the DTE
device (the GE meter is usually considered the DTE device). When the RS232 standard is strictly followed,
these signals are labeled with the same name and pin # on the DCE device side as well. Unfortunately, the
convention is not followed because the DTE and DCE side get confused. Therefore, connections that imply
direction are changed to reflect their direction on the DCE side.
4. Feed the flying leads end of the cable through the conduit hole and wire it to terminal block J1. Connect the
other end of the cable to the printer, ANSI terminal or personal computer, and secure the cable clamp.
After the wiring has been completed, consult the User’s Manual for the external device to configure it for use with the
XMT868i.
Table 1: RS232 Connection to DCE or DTE Device
J1
Pin # Signal Description
DCE
DB25
Pin #
DCE
DB9
Pin #
DTE
DB25
Pin #
DTE
DB9
Pin #
5 DTR (Data Terminal Ready) 20 4 20 4
6CTS(CleartoSend) 4758
7COM(Ground) 7575
8RX(Receive) 2332
9TX(Transmit) 3223
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.

DigitalFlow™ XMT868i Startup Guide 11
Chapter 1. Installation
1.7.4b Wiring the RS485 Interface
Use the optional RS485 serial port to network multiple XMT868i flow transmitters to a single computer terminal. As
an option, the standard RS232 port on the XMT868i may be configured as a two-wire, half-duplex RS485 interface.
IMPORTANT: The XMT868i must be configured at the factory for RS485 operation. The maximum cable length for
RS485 is 4000 ft (1200 m).
To wire the RS485 serial port, refer to Figure 10 on page 23 and complete the following steps:
1. Disconnect the main power to the unit and remove the rear cover.
2. Install the required cable clamp in the chosen conduit hole on the side of the electronics enclosure.
3. Feed one end of the cable through the conduit hole, wire it to terminal block J1 and secure the cable clamp. Use
the information in Table 2 below to wire a suitable cable for connecting the XMT868i to the external device.
4. If wiring of the unit has been completed, reinstall the rear cover on the enclosure and tighten the set screw.
Proceed to the next section to continue the initial wiring of the unit.
Table 2: RS485 Connections
J1 Pin # Signal Description
9 Data +
8 Data -
7Shield
6NotUsed
5NotUsed
4NotUsed
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.

Chapter 1. Installation
12 DigitalFlow™ XMT868i Startup Guide
1.7.5 Wiring Option Cards
The XMT868i can accommodate one option card in Slot 1 and one option card in Slot 2. The following types of option
cards are available only in the combinations listed in Table 22 on page 69:
•Alarm Relays (Slot 1)
•Analog Inputs (Slot 1)
•Totalizer/Frequency Outputs (Slot 1)
•RTD Inputs (Slot 1)
•Analog Outputs (Slot 1)
•MODBUS Communications (Slot 2)
•MODBUS/TCP Communications (Slot 2)
•Ethernet (Slot 2)
•Foundation Fieldbus (Slot 2)
•Data logging (Slot 2) - no wiring required
1.7.5a Preparing for Wiring
Wiring any option card installed in Slot 1 requires completion of the following general steps:
1. Disconnect the main power to the unit and remove the rear cover.
2. Install a cable clamp in the chosen conduit hole on the side of the electronics enclosure and feed a standard
twisted-pair cable through this conduit hole.
3. Locate the 12-pin terminal block (J2) in Figure 10 on page 23 and wire the option card as indicated on the label
inside the rear cover (see Figure 3 on page 6 and Figure 11 on page 24). Secure the cable clamp.
IMPORTANT: Because of the attached wiring label, all rear covers must remain with their original meters.
4. If wiring of the unit has been completed, reinstall the rear cover on the enclosure and tighten the set screw.
Note: Prior to use, the option card must be set up and calibrated. See Chapter 1, Programming Site Data, in the
Programming Manual and Chapter 1, Calibration, in the Service Manual for detailed instructions.
For more specific instructions on particular option cards, proceed to the appropriate sub-section(s) that follow.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.