GE Sensing XMT868i Startup Guide
GE
Measurement & Control Flow
DigitalFlow™ XMT868i
Ultrasonic Flow Transmitter for Liquids
(1 & 2-Channel)
Startup Guide
910-171U Rev. H
February 2017
DigitalFlow™ XMT868i
Ultrasonic Flow Transmitter for Liquids
(1 & 2-Channel)
Startup Guide
910-171U Rev. H
February 2017
www.gemeasurement.com
©2016 General Electric Company. All rights reserved.
Technical content subject to change without notice.
[no content intended for this page]
ii
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.
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.
Safety Issues
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.
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
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.
DigitalFlow™ XMT868i Startup Guide iii
Preface
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
information about this initiative.
for take-back instructions and more
iv DigitalFlow™ XMT868i Startup Guide
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
DigitalFlow™ XMT868i Startup Guide v
Contents
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
vi DigitalFlow™ XMT868i Startup Guide
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
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.
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.
DigitalFlow™ XMT868i Startup Guide 1
Chapter 1. Installation
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.
2 DigitalFlow™ XMT868i Startup Guide
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.
DigitalFlow™ XMT868i Startup Guide 3
Chapter 1. Installation
Transmitter
RTD
Coupling
Thermowell
Flowcell Wall
Temperature
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.
4 DigitalFlow™ XMT868i Startup Guide
Figure 2: Typical Temperature Transmitter Mounting
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.
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.
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.
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.
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.
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.
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.
DigitalFlow™ XMT868i Startup Guide 5
Chapter 1. Installation
Slots
Power Connections
Option Card Connections
Label
Set Screw
1.7 Making Electrical Connections (cont.)
Inside View Outside View
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
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.
TB5 and connect the line power as follows:
6 DigitalFlow™ XMT868i Startup Guide
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.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
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
number assignments shown in Figure 10 on page 23.
5. Leaving a bit of slack, secure the power line with the cable clamp.
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.
Proceed to the next section to continue the initial wiring of the Model XMT868i flow transmitter.
TB5, using the pin
DigitalFlow™ XMT868i Startup Guide 7
Chapter 1. Installation
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.
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.
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
Then, secure the cable clamp.
Note: The RED cable leads are the SIG(+) leads and the BLACK cable leads are the RTN(-) leads.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
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.
J3.
8 DigitalFlow™ XMT868i Startup Guide
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.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
4. If wiring of the unit has been completed, reinstall the rear cover on the enclosure and tighten the set screw.
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.
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).
DigitalFlow™ XMT868i Startup Guide 9
Chapter 1. Installation
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 Ta bl e 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.
Table 1: RS232 Connection to DCE or DTE Device
DCE
J1
Pin # Signal Description
DB25
Pin #
5 DTR (Data Terminal Ready) 20 4 20 4
6CTS (Clear to Send) 4758
7COM (Ground) 7575
8RX (Receive) 2332
DCE
DB9
Pin #
DTE
DB25
Pin #
DTE
DB9
Pin #
9TX (Transmit) 3223
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.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
After the wiring has been completed, consult the User’s Manual for the external device to configure it for use with the
XMT868i.
10 DigitalFlow™ XMT868i Startup Guide
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 Ta bl e 2 below to wire a suitable cable for connecting the XMT868i to the external device.
Table 2: RS485 Connections
J1 Pin # Signal Description
9 Data +
8 Data -
7Shield
6Not Used
5Not Used
4Not Used
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
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.
DigitalFlow™ XMT868i Startup Guide 11
Chapter 1. Installation
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 (
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.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
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.
J2) in Figure 10 on page 23 and wire the option card as indicated on the label
For more specific instructions on particular option cards, proceed to the appropriate sub-section(s) that follow.
12 DigitalFlow™ XMT868i Startup Guide
Chapter 1. Installation
C
NO
NC NC
C
NO
NC NC
C
NO
C
NO
Conventional
not triggered not triggered
Fail-Safe
triggered or power failure
Fail-Safe
triggered
Conventional
ALARM
MONITORING
DEVICE DEVICE
MONITORING
ALARM
DEVICE
MONITORING
ALARM
DEVICE
MONITORING
ALARM
1.7.5b Wiring an Alarms Option Card
Each alarms option card includes two or four general-purpose Form C relays (designated as A, B, C and D).
The maximum electrical ratings for the relays are listed in Chapter 4, Specifications. Each of the alarm relays can be
wired as either Normally Open (NO) or Normally Closed (NC).
In setting up an alarm relay, it may be wired for either conventional or fail-safe operation. In fail-safe mode, the alarm
relay is constantly energized, except when it is triggered or a power failure or other interruption occurs. See Figure 4
below for the operation of a normally open alarm relay in both conventional and fail-safe mode.
Connect each alarm relay in accordance with the wiring instructions shown on the label inside the rear cover (see
Figure 3 on page 6 and Figure 11 on page 24).
Figure 4: Conventional and Fail-Safe Operation
DigitalFlow™ XMT868i Startup Guide 13
Chapter 1. Installation
+24V
INPUT +
INPUT +
+24V
+–
+ IN
– OUT
+ IN
– OUT
Sensor
Sensor
Transmitter
Transmitter
Analog Input
Analog Input
24 VDC
POWER SUPPLY
With External Power Supply
With Internal Power Supply
1.7.5c Wiring a 0/4-20 mA Analog Inputs Option Card
This option card includes two or four isolated 0/4-20 mA analog inputs (designated as A, B, C and D), each of which
includes a 24 VDC power supply for loop-powered transmitters. Either input may be used to process the temperature
signal, while the other input is used to process the pressure signal.
Note: To enter programming data during operation of the meter, it will be necessary to know which input is assigned
to which process parameter. This information should be entered in Appendix B, Data Records.
The analog inputs, which have an impedance of 118 ohms, should be connected with standard twisted-pair wiring.
Power to the transmitters may be supplied either by the integral 24 VDC power supply on the analog input option card
or by an external power supply. Figure 5 below shows typical wiring diagrams, with and without an external power
supply, for one of the analog inputs.
Figure 5: Analog Input Wiring Diagram
Wire the analog inputs as shown on the label in the rear cover (see Figure 3 on page 6 and Figure 11 on page 24).
Note: The analog inputs option card can be calibrated with the Model XMT868i’s built-in analog outputs. However,
be certain that the analog outputs have been calibrated first. See Chapter 1, Calibration, in the Service Manual
for the appropriate procedures.
14 DigitalFlow™ XMT868i Startup Guide
Chapter 1. Installation
OUT
RTN
IN
Common
Load
Volts -
(Common)
Volts +
(Int. Pwr. Sup.)
OUT
RTN
+5V
200
:
Model XMT868 Pulse Counter
Totalizer Output
Frequency CounterModel XMT868
Frequency Output
1.7.5d Wiring a Totalizer and Frequency Output Option Card
Each totalizer and frequency output option card provides two or four outputs (designated as A, B, C, and D).
Wire this option card in accordance with the connections shown on the label in the rear cover (see Figure 3 on page 6
and Figure 11 on page 24). Figure 6 below shows sample wiring diagrams of a totalizer output circuit and a frequency
output circuit. Refer to Electrical Specifications on page 61 for the load and voltage requirements.
Figure 6: Totalizer and Frequency Output Wiring
DigitalFlow™ XMT868i Startup Guide 15
Chapter 1. Installation
1.7.5e Wiring an RTD Inputs Option Card
The Model XMT868i RTD (Resistance Temperature Device) inputs option card provides two direct RTD inputs
(designated as A and B). Each RTD input requires three wires, and should be connected as shown on the label in the
rear cover (see Figure 3 on page 6 and Figure 11 on page 24).
1.7.5f Wiring a 0/4-20 mA Analog Outputs Option Card
The analog outputs option card includes two isolated 0/4-20 mA outputs (designated as A and B). Connections to these
outputs may be made with standard twisted-pair wiring, but the total current loop impedance for these circuits must not
exceed 1,000 ohms. Wire this option card with the connections shown on the label in the rear cover (see Figure 3 on
page 6 and Figure 11 on page 24).
1.7.5g A Specific Example
To illustrate the procedures described in the previous sections for wiring the option cards, a specific example may
prove helpful. Assume that an XMT868i is equipped with an option card numbered 703-1223-08. Table 22 on page 69
in Appendix B, Data Records, indicates that this option card includes two analog current inputs and two standard alarm
relays.
By referring to Figure 11 on page 24, you can see that the appropriate connection diagram for this option card is the
first one from the left in the middle row. This label is also be found inside the rear cover of the XMT868i. Based on this
information, wiring of the Input/Output connections to terminal block
below.
J2 should be completed as shown in Ta ble 3
Table 3: Wiring a 703-1223-08 Option Card
J2 Pin # Description Connection
1 Alarm A Normally Open
2Alarm A Common
3 Alarm A Normally Closed
4 Alarm B Normally Open
5Alarm B Common
6 Alarm B Normally Closed
7 Out C +24 V to Input C
8 Input C Signal (+)
9 Input C Return (-)
10 Out D +24 V to Input D
11 Input D Signal (+)
12 Input D Return (-)
16 DigitalFlow™ XMT868i Startup Guide
Chapter 1. Installation
N/C
MODBUS –
MODBUS +
1.7.5h Wiring the MODBUS Option Card
The MODBUS option card uses the RS485 standard for MODBUS communication. The MODBUS card must be
installed in Slot 2. The RS485 standard allows up to 32 nodes (drivers and receivers) on one multi-drop network, at
distances up to 4,000 ft (1,200 m). GE recommends using 24-gauge (24 AWG) twisted-pair wire with a characteristic
impedance of 120 ohms and 120-ohm termination at each end of the communications line.
Note: The MODBUS option card provides its own RS485 connections. Thus, the meter can have its serial port
configured as RS232 and still provide RS485 MODBUS signals.
IMPORTANT: Because the MODBUS option card uses pins 1 and 2 on terminal block J2, only those option cards that
do not use these pins may be installed in Slot 1, while a MODBUS card is installed in Slot 2.
Specifically, only the option cards designated as “OI” and “OR” in Figure 11 on page 24 are
compatible with the MODBUS option card.
To link the XMT868i to the control system (refer to Figure 7 below):
1. Connect the MODBUS– wire to pin
2. Connect the MODBUS+ wire to pin
3. Pin #3 has no connection.
#2, the inverting or negative connection.
#1, the non-inverting or positive connection.
Figure 7: The RS485 MODBUS Terminal Block Connector
DigitalFlow™ XMT868i Startup Guide 17
Chapter 1. Installation
1.7.5i Wiring the MODBUS/TCP Interface
Customers can also use a modified XMT868i that provides a MODBUS/TCP interface to communicate to an internal
network. An optional MODBUS/TCP card with a unique MAC (IP) address (installed only in slot 2) includes an RJ45
connector. To connect the MODBUS/TCP-enabled XMT868i to the network, insert the jack of an RJ45 cable into the
RJ45 connector, route the cable through one of the conduit holes using an appropriate cable clamp, and wire the other
end of the cable to the Ethernet network according to the manufacturer’s instructions (see Figure 12 on page 25).
Note: The MAC address for a specific XMT868i is included with customer documentation. For more information on
setting up the MAC address, refer to Chapter 6 of the Programming Manual.
1.7.5j Wiring the Ethernet Interface
A modified XMT868i can use the Ethernet interface to communicate to a local area network. An optional Ethernet card
with a unique MAC (IP) address (installed only in slot 2) includes an RJ45 connector. To connect the Ethernet-enabled
XMT868i to the network, insert the jack of an RJ45 cable into the RJ45 connector, route the cable through one of the
conduit holes using an appropriate cable clamp, and wire the other end of the cable to the Ethernet network according
to the manufacturer’s instructions. An external connection is required between the Ethernet option card and the
XMT868i’s RS232 connector, as shown in Ta bl e 4 below and Figure 12 on page 25.
Note: The MAC address for a specific XMT868i is included with customer documentation. For more information on
setting up the MAC address, refer to Appendix C of the Programming Manual.
Table 4: RS232 to Ethernet Interconnections
RS232 TB
on Rear PC Board
on Ethernet Card
TB1
TX Pin 1
RX Pin 2
COM Pin 3
18 DigitalFlow™ XMT868i Startup Guide
Chapter 1. Installation
1.7.5k Wiring the Foundation Fieldbus Interface
To connect the Foundation Fieldbus interface to the XMT868i, make the network connections at J8, pins 1 and 2, as
shown in drawing Y of Figure 12 on page 25. As an option, you can connect a shield to J8 pin 3, depending on the
network wiring.
No connections are made to J9 under normal operation. If you need to reset the network board to factory defaults,
proceed as follows:
1. Connect a jumper between J9 pin 2 and J9 pin 3.
2. Power cycle (i.e., turn it Off and then back On) the XMT868i.
3. Ten seconds after the power has been restored to the XMT868i, remove the jumper to return the network circuit
board to normal operation.
1.7.5l Data Logging Option Card
The XMT868i can be fitted with a data logging option card, which must be installed in Slot 2. The data logging option
card increases the XMT868i’s memory by up to 2 MB.
WARNING! To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance.
1.7.5m Procedure Options
After the XMT868i has been completely installed and wired, proceed to Chapter 2, Initial Setup, to program the meter
for taking flow rate measurements.
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.
DigitalFlow™ XMT868i Startup Guide 19
Chapter 1. Installation
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20 DigitalFlow™ XMT868i Startup Guide
D
S
O
R
U
V
I
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N
E
P
A
T
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O
S
S
E
O
I
N
S
N
O
P
O
O
T
N
E
N
W
H
S
E
D
E
R
N
E
I
L
E
G
I
Ø6.10 (155)
8.20
2.06
51°
7 PLCS
3/4" NPTF
7 PLCS
3.86
SEE
A A
VIEW A-A
0.52 (13)
DETAIL A
3/4" NPT
1/4-20 UNC-2B
1.50
1.00
0.28 (7)
0.25 (6)
10-32 EXTERNAL GROUND SCREW
4PLCS
3/4" NPTF
7 PLCS
(52)
(98)
(208)
(38)
NOTES:
1. ALL DIMENSIONS ARE REFERENCE.
2. WEIGHT: 10 LB (4.5 KG) AL
25 LB (11.5 KG) SS
3. DIMENSIONS ARE IN INCHES (MILLIMETERS).
(25)
DETAIL A
Chapter 1. Installation
Figure 8: Model XMT868i Outline and Installation (ref. dwg #712-1318)
DigitalFlow™ XMT868i Startup Guide 21
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