a front - Fluid Components International

a front - Fluid Components International
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
Model MT91
Multipoint Flowmeter
Software Version 1.1xx
Doc. No. 003185 Rev. B
Notice of Proprietary Rights
This document contains confidential technical data, including trade
secrets and proprietary information which are the property of Fluid
Components Intl (FCI).
Disclosure of this data to you is expressely conditioned upon your assent
that its use is limited to use within your company only (and does not
include manufacture or processing uses). Any other use is strictly
prohibited without the prior written consent of FCI.
© Copyright 1997 Fluid Components Intl
a limited liability company
All Rights Reserved
10/19/93
FLUID COMPONENTS INTL
MT91B.PM5
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
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CUSTOMER COMMITMENT PLEDGE
We will work closely with our customers to provide the best products and service
• at a competitive value
• on time
• with unquestioned support
in full compliance with our COMPLETE CUSTOMER COMMITMENT.
COMMITMENT TO QUALITY
In keeping with the overall commitment of management and employees of Fluid Components Intl to Total Quality
Management, the Technical Publications Department expresses its pledge and mission to you, our customer:
“To support the creation and publication of world-class technical material which is technically accurate and
practical, concise and user-friendly, attractive and professional in appearance, and consistent in form, format,
content, and style.”
QUALITY IMPROVEMENT
We appreciate your comments and suggestions which support our effort to constantly improve our product and
services. Please address comments and suggestions to your nearest field representative or in-house technical support
representative. Thank you.
FCI Technical Publications Department
Doc. No. 003185 Rev. B
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Model MT91 Multipoint Flowmeter
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CUSTOMER SERVICE/TECHNICAL SUPPORT
FCI provides full in-house technical support for our products 8 a.m. to 5 p.m. PST, Monday through Friday (excepting holidays and an annual plant closure between Christmas and New Year's day). Also, additional technical
representation is provided by FCI field representatives. Before contacting one of our field or in-house representatives, please ensure that you have performed the troubleshooting techniques outlined in this document.
By Mail
Fluid Components Intl
1755 La Costa Meadows Dr.
San Marcos, CA 92069
Attn: Customer Service Department
By Phone
Contact the FCI regional representative in your area. If your are unable to contact the field representative or
are unable to satisfactorily resolve the situation, contact the FCI Customer Service Department at
1 (800) 854-1993.
By Fax
To describe your problems in a more graphical or pictorial manner, send your fax including your phone or
fax number to your regional representative. Again FCI is available through facsimile if you have exhaused
your possibilities with the authorized factory representative. Our fax number is (760) 736-6250; it is
available 7 days a week, 24 hours a day.
International support
For product information or product support outside the contiguous United States, Alaska, or Hawaii, contact
your country’s FCI International Representative or the one nearest to you. See list on following pages.
Appendix C contains a detailed explanation of the FCI customer service policy on returns, adjustments, in-field or
factory repair, in- or out-of-warranty.
Model MT91 Multipoint Flowmeter
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Reserved for Domestic Rep Map
Doc. No. 003185 Rev. B
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Model MT91 Multipoint Flowmeter
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Reserved for International Rep Map
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
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REVISIONS
REV.
B
DESCRIPTION
DATE AUTHOR
Incorporated Errata 17EN000020 into the manual. Changed Appendix C.
03/17/97
R. Sanders
See change bars for all other changes.
Doc. No. 003185 Rev. B
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Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
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Contents
Chapter 1 - General Information
Description ......................................................................................................................... 1-1
Flow Element .............................................................................................................. 1-1
Flow Transmitter ........................................................................................................ 1-1
Theory of Operation .......................................................................................................... 1-2
Specifications ...................................................................................................................... 1-2
Chapter 2 - Installation
Receiving/Inspection ........................................................................................................ 2-1
Packing/Shipping/Returns ............................................................................................. 2-1
Factory Calibration Note .................................................................................................. 2-1
Pre-Installation Procedure ................................................................................................ 2-1
Verify Serial Numbers ............................................................................................... 2-1
Prepare or Verify Flow Element Location .............................................................. 2-1
Verify Dimensions ...................................................................................................... 2-2
Verify Flow Direction for Flow Element Orientation and Placement ................ 2-2
Install Flow Element .......................................................................................................... 2-2
Threaded Mounting ................................................................................................... 2-2
Flanged Mounting ...................................................................................................... 2-3
Install Flow Transmitter ................................................................................................... 2-3
Minimum Wire Size ................................................................................................... 2-3
Remote Hardware ...................................................................................................... 2-3
Power Connection Information ................................................................................ 2-4
NEMA 4 Remote Enclosure ................................................................................2-4
Rackmount Remote Enclosure ........................................................................... 2-4
Sensing Point Connections ........................................................................................ 2-4
NEMA 4 Remote Enclosure ................................................................................2-4
Rackmount Remote Enclosure ........................................................................... 2-4
Customer Connections ...................................................................................................... 2-7
Analog Output Board - Assy #015231 ..................................................................... 2-7
Jumper J2 ............................................................................................................... 2-7
Jumper J3 ............................................................................................................... 2-7
Connector J4 .......................................................................................................... 2-7
Relay Output Board - Assy #015235 ........................................................................ 2-8
Connector J1 .......................................................................................................... 2-8
Connector J2 .......................................................................................................... 2-8
Connector J3 .......................................................................................................... 2-8
Serial Communication Ports - Backplane Board Assy #015206 ........................... 2-9
Connector J17 - EIA-232 ......................................................................................2-9
Connector J23 - 4-20mA ......................................................................................2-9
Connector J24 - EIA-422/EIA-485 ..................................................................... 2-9
Installation Quick Check List ........................................................................................... 2 - 10
Chapter 3 - Operation
Introduction ........................................................................................................................ 3-1
Start Up ............................................................................................................................... 3-1
Using the MT91 Software with Display ......................................................................... 3-1
Display ......................................................................................................................... 3-1
Menu Window ............................................................................................................ 3-1
Other Window Types ................................................................................................ 3-2
Menu Control .............................................................................................................. 3-2
Menu Organization .................................................................................................... 3-2
Quick Custom Setup ......................................................................................................... 3-4
In-Depth Custom Setup Procedure ................................................................................. 3-6
Password Protection .................................................................................................. 3-6
Factory Level ......................................................................................................... 3-6
User Level .............................................................................................................3-6
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Model MT91 Multipoint Flowmeter
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Selecting Units of Measure ....................................................................................... 3-7
Selecting the Normal Display Screen ...................................................................... 3-8
Assigning Sensing Points to Outputs ...................................................................... 3-8
Setting Analog Outputs ............................................................................................. 3-9
Setting Discrete Outputs ........................................................................................... 3 - 10
Daily Calibration Testing .......................................................................................... 3 - 12
Advanced Features ............................................................................................................ 3 - 13
Flow Rate Correction Equation ................................................................................ 3 - 13
Offset Adjustment of Sensing Points ....................................................................... 3 - 14
Applying the Filter ..................................................................................................... 3 - 15
Serial Communications ............................................................................................. 3 - 16
Chapter 4 - Maintenance
Maintenance ....................................................................................................................... 4-1
Calibration ................................................................................................................... 4-1
Electrical Connections ............................................................................................... 4-1
Transmitter Enclosure ............................................................................................... 4-1
Electrical Wiring ......................................................................................................... 4-1
Flow Element Connections ....................................................................................... 4-1
Flow Element Assembly ............................................................................................ 4-1
Chapter 5 - Troubleshooting
Quick Check ....................................................................................................................... 5-1
Non-maintencance Observations .................................................................................... 5-1
Check Serial Numbers ............................................................................................... 5-1
Check Input Power ..................................................................................................... 5-1
Check the Unit Installation ....................................................................................... 5-1
Check for Moisture ..................................................................................................... 5-1
Check Application Design Requirements ............................................................... 5-2
Verify Standard vs. Actual Process Conditions ..................................................... 5-2
Troubleshooting Process ................................................................................................... 5-2
Verify Units ................................................................................................................. 5-2
Verify Channel Assignment ...................................................................................... 5-2
Verify Limits ............................................................................................................... 5-3
Check for Suspect Sensing Points and Heaters ...................................................... 5-3
Verify the Calibration Parameters ........................................................................... 5-3
Check the Resistance of the Sensing Points ............................................................ 5-4
Check the Analog Outputs ........................................................................................ 5-5
Check the Relays ......................................................................................................... 5-5
Run the Calibration Test ............................................................................................ 5-5
Spares .................................................................................................................................. 5-6
Defective Parts ................................................................................................................... 5-6
Customer Service ............................................................................................................... 5-6
Appendix A - Drawings
Outline Drawings .............................................................................................................. A - 1
Appendix B - Glossary
Abbreviations and Explanation of Terms ...................................................................... B - 1
Appendix C - Customer Service
Policy and Prodedures ...................................................................................................... C - 1
Appendix D - MT91 Delta R Parameters
Explanation of and Fill-Out Sheets for Delta R Parameters ........................................ D - 1
Appendix E - CE Conformance
CE Mark Conformance Informance Information .......................................................... E - 1
Model MT91 Multipoint Flowmeter
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Figures
1-1
Flow Element Cutaway View of One Sensing Point ............................................................1-1
1-2
Functional Block Diagram ........................................................................................................1-1
2-1
Flow Element Showing Flat Area ............................................................................................2-2
2-2
MT91 Wiring Diagram ..............................................................................................................2-5
2-3
Flow Transmitter Outline for NEMA 4 and Rackmount Remote Enlosures..................... 2-6
2-4
Wiring Diagram for Serial Connector EIA-232 ..................................................................... 2-9
2-5
Wiring Diagram for Serial Connectors EIA-422 & EIA-485 ................................................2 - 10
3-1
Menu Window ........................................................................................................................... 3-1
3-2
Keypad Layout ........................................................................................................................... 3-2
3-3
Menu Flowchart .........................................................................................................................3-3
3-4
Normal Display Screen 1 and Screen 2 ...................................................................................3-8
3-5
Assign Heads Display ............................................................................................................... 3-9
3-6
Analog Output ........................................................................................................................... 3-9
3-7
Relay Switch Points Schemes ................................................................................................... 3 - 11
3-8
Calibration Test Display Screens ............................................................................................. 3 - 12
3-9
Desired Flow Rate vs. Measured Flow Rate ..........................................................................3 - 14
3-10 Delta-R vs. Flow Rate ................................................................................................................ 3 - 15
3-11 Effects of Filter on Flow Signal vs. Time ................................................................................3 - 15
5-1
J1 Connector Plug on the Backplane Board ........................................................................... 5-4
5-2
TB1-HD1 Terminal Connector .................................................................................................5-5
A-1
Flow Element Installation Drawing ........................................................................................ A - 1
A-2
Local Enclosures ........................................................................................................................A - 2
A-3
NEMA 4 Remote Enclosure ......................................................................................................A - 2
A-4
Rackmount Remote Enclosure .................................................................................................A - 3
A-5
Recommended Customer Process Connection and End Support Configuration ............A - 4
A-6
Alternate End Support Configuration ....................................................................................A - 5
2-1
Interconnecting Cable Size (AWG) .........................................................................................2-3
2-2
Connector J4 Signal Information ............................................................................................. 2-7
2-3
Connector J2 and J3 Signal Information ................................................................................. 2-8
3-1
Key Functions .............................................................................................................................3-2
3-2
Units of Measure and Abbreviations ......................................................................................3-7
Tables
3-3
Relay Assignments by Parameters ..........................................................................................3 - 10
3-4
Commands and Responses for Protocol ................................................................................. 3 - 17
5-1
Quick Check Troubleshooting .................................................................................................5-1
5-2
Resistances at J1 Connector Plug on the Backplane Board ..................................................5-4
5-3
Resistances at TB1-HD1 Terminal Connector ........................................................................5-5
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Model MT91 Multipoint Flowmeter
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Symbols
The following symbols are used throughout the manual to draw your attention to items or procedures that require
special notice or care.
Warning:
Caution:
Note:
Warns of possible personal danger to those handling the equipment.
Cautions against possible equipment damage.
Contains important information.
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
CHAPTER 1 - GENERAL INFORMATION
FLUID COMPONENTS INTL
1. General Information
Description
The MT91 is an air and gas mass multipoint flowmeter that incorporates a remote flow element connected to a
microprocessor control and display package (flow transmitter) designed to measure mass flow in ducts, stacks, or
places where irregular flow may reduce the accuracy of single point metering. The MT91 measures mass flow from
up to 16 different sensing points. An average of all individual flow signals produces an output signal representing
total mass flow. The MT91 can be factory calibrated to sense a range of mass flow from 0.25 SFPS to 150 SFPS in
air at standard temperature and pressure (70°F at 14.7 PSIA).
Flow Element
The flow element holds all of the individual sensing points. Each sensing point consists of two pairs of thermowells
of the same size and shape (see Figure 1-1). One thermowell pair contains a heater and an active Resistance
Temperature Detector (RTD). The second pair contains the reference RTD and a thermal mass equalizer.
Figure 1-1. Flow Element Cutaway View of One Sensing Point
Flow Transmitter
The flow transmitter assembly provides power for the flow element, measure the Temperature Differential (DT)
between the active and reference sensors for each individual sensing point, and averages all flow signals to one
output signal. Available outputs options are field programmable to select 4-20 mA, 0-10 Vdc, 0-5 Vdc, digital, with
relay output signals. Three serial communication ports, EIA-232C (RS-232C), EIA-422 (RS-422), or EIA-485
(RS-485), are also field selectable and programmable for output signals. Parameters are programmable using the
keypad or serial communication interface. See Figure 1-2.
MT91 Transmitter Keypad and Display Package
Keyboard
Input
Display
Output
Analog Output
Sensor
Excitation
4-20mA
0-10 Vdc
1-5 Vdc
MT91 Microprocessor
Sensor
Data
Acquisition
Relay Output
Parameter
Alarms
Analog
Input
Serial
EEPROM
Serial
Interface
RS-232C
RS-422
RS-485
C00226-1
Figure 1-2. Functional Block Diagram
Doc. No. 003185 Rev. B
1-1
Model MT91 Multipoint Flowmeter
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CHAPTER 1 - GENERAL INFORMATION
Theory of Operation
The flow element has multiple sensing points that consists of two pairs of thermowells of the same size, shape and
mass. One pair contains a platinum RTD and a heater element. The other pair contains one RTD. The RTD located
next to the heater element is called the active sensor. The other RTD is referred to as the reference sensor. Since the
active sensor is adjacent to the heater, the temperature at the walls of the thermowell are always above the
temperature of the process media. The temperature at the reference sensor is the temperature of the process media.
When the process media is flowing past the active sensor a quantity of heat is carried off into the flow stream. The
amount of heat taken from the active sensor is a function of the process media mass flow rate. A DT exists between
the two pairs of thermowells and a proportional DR exists between the active and the reference sensors. The DR is
measured by the flow transmitter. The relationship of DT to the mass flow rate is calculated by the flow transmitter
and is converted into a signal and is sent to the flow transmitter's display.
Specifications
Process Connection
2 inch male NPT or 3 inch 150 lb. raised-face carbon steel
flange. Other flange connection sizes and materials
available.
Insertion Length
Variable
Material of Construction
All wetted surfaces are 316 Stainless Steel with nickel
brazed joints per process specification AMS 4777.
Hastelloy C-276 and other materials and electroless nickel
plating also available.
Enclosure
Flow element: NEMA 4. NEMA 7 optional.
Flow transmitter Assembly: NEMA 4 or 19 inch
Rackmount in accordance with DIN 41494 part 1, ANSI/
EIA-RS-310C. NEMA 7 optional.
Model MT91 Multipoint Flowmeter
Temperature Range for Flow Element
Low -50° to 350°F (-45° to 178°C)
High 350° to 850°F (178° to 458°C)
Temperature Range for Flow Transmitter
0° to 140°F (-18° to 60°C)*
* The LCD display will not function in temperatures below
32°F (0°C).
Operating Pressure
Up to 50 psig (3.5 barg)
Power Requirements
85 to 265 Vac, 47 to 63 Hz, 3.5 Amp fused 20 to 32 Vdc 24
Vdc nominal
Electrical Connection
1 inch female NPT
Relay Rating
2 relays per relay output board. Relays are DPDT, 0.3A at
125 Vac, 0.3A at 110 Vdc, 1.0A at 30 Vdc.
1-2
Doc. No. 003185 Rev. B
CHAPTER 2 - INSTALLATION
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2. Installation
Receiving/Inspection
•
•
•
Unpack carefully
Verify that all items in the packing list are received and are correct.
Inspect all instruments for damage or contaminants prior to installation.
If the above three items are satisfactory, proceed with the installation. If not, then stop and contact a customer
service representative.
Packing/Shipping/Returns
These issues are addressed in Appendix C - Customer Service
Factory Calibration Note
The flowmeter is factory calibrated to the flow range specified in the order. There is no need to perform any
verification or calibration steps prior to installing and placing the flowmeter in service.
Pre-Installation Procedure
Warning:
Caution:
Only qualified personnel should install this instrument. Install and follow safety procedures in
accordance with the current National Electrical Code. Ensure that power is off during installation.
Any instances where power is applied to the instrument will be noted in this manual. Where the
instructions call for the use of electrical current, the operator assumes all responsibility for
conformance to safety standards and practices.
The flowmeter is not designed for weld-in-place applications. Never weld to process connection or a
structural support.
Damage resulting from moisture penetration of the flow transmitter or flow element enclosure is not
covered by product warranty.
The flow transmitter containsESD components. Use standard ESD precautions when handling the flow
transmitter. See below for ESD details.
Use Standard ESD Precautions
Use standard ESD precautions when opening an instrument enclosure or handling the flow transmitter. FCI
recommends the use of the following precautions: Use a wrist band or heel strap with a 1 megohm resistor connected
to ground. If the instrument is in a shop setting there should be static conductive mats on the work table and floor
with a 1 megohm resistor connected to ground. Connect the instrument to ground. Apply anti static agents to hand
tools to be used on the instrument. Keep high static producing items away from the instrument such as non-ESD
approved plastic, tape and packing foam.
The above precautions are minimum requirements to be used. The complete use of ESD precautions can be found in
the U.S. Department of Defense Handbook 263.
Doc. No. 003185 Rev. B
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Model MT91 Multipoint Flowmeter
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CHAPTER 2 - INSTALLATION
Verify Serial Numbers
Verify that the flow elements' serial number matches the flow transmitter serial number. A tag indicating the serial
number is located on the local and remote enclosures, see Figures A-2, A-3, and A-4.
When multiple flow elements connect to one flow transmitter, each flow element serial number has a suffix that
represents the flow element number. For example, if two flow elements connected to a flow transmitter have a base
serial number of 123, then the first flow element would have the serial number 123-1, and the second flow element
would have the serial number 123-2.
Prepare or Verify Flow Element Location
Mount the flow element at least 20 diameters downstream and 10 diameters upstream from any bends or interference
in the process pipe or duct to achieve the greatest accuracy.
Mount the flow element where the flow stream temperature is well above the saturation temperature of any of the
process gases. If a component of the process media is near its saturation temperature, it will probably condense on
the sensing points. Liquid on the sensing points will drive the flow measurement higher than actual.
The flow element’s shape is cylindrical with a diameter of 2 inches. The length is customer specified. The
recommended diameter for the clearance hole needed to mount the flow element is 2.03 inches. See Figure A-5 for
recommended process connection.
For optimum performance, prepare additional support at the end of the flow element for instruments exceeding 2 feet
in length. Refer to Figure A-5, and A-6 for recommended end support configuration.
Verify Dimensions
Verify the flow element and flow transmitter dimensions as shown in Appendix A.
Verify Flow Direction for Flow Element Orientation and Placement
The flow element comes with a FLAT area machined on the flow element near the enclosure. Etched in the FLAT is
a FLOW ARROW indicating the direction of flow. See Figure 2-1.
Figure 2-1. Flow Element Showing FLAT Area
Align the flow element during installation so the FLAT is parallel, to the direction of the process media flow, and
the FLOW ARROW points in the direction of process media flow. Failing to install the flow element correctly will
reduce the accuracy of the flowmeter.
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
CHAPTER 2 - INSTALLATION
FLUID COMPONENTS INTL
Install Flow Element
Install the flow element as specified for the process connection type used. If applicable, connect the end of the flow
element to one of the recommended mechanical supports. See Figure A-5 or A-6.
Threaded Mounting
Note: When mounting the flow element to the process duct, it is important that a lubricant/sealant is applied to the
male threads of all NPT connections. Be sure to use a lubricant/sealant compatible with the process
environment. Tighten all connections firmly. To avoid leaks do not overtighten or cross-thread
connections.
1.
Verify end hardware is loose if present. Carefully insert flow element into process mount. Align with end
support if present.
2.
Verify that the process media is in the same direction as the FLOW ARROW on the FLAT.
3.
Threads are right-handed. Place pipe wrench on unthreaded portion of metal shaft. Rotate until snug and
continue to turn until FLAT is horizontal to process flow. Apply even pressure so as not to disfigure nipple.
Caution:
4.
Do not apply any leverage to the local enclosure itself.
Tighten all connections firmly. Tighten all end hardware firmly if present.
Flanged Mounting
1.
Verify end hardware is loose if present. Carefully insert flow element into process mount. Align with end
support if present.
2.
Attach the process mating flange with care. Maintain the correct orientation of the flow element to ensure
accuracy.
3.
Verify that the Process Media is in the same direction as the FLOW ARROW on the FLAT.
4.
Apply the appropriate gasket and/or sealant to flange mount faces as required.
5.
Attach with a bolt, two flat washers, lock washer and nut for each bolt hole; apply lubricant/sealant to male
threads and torque. Refer to ANSI B16.5 specifications.
6.
Tighten all connections firmly.
Install Flow Transmitter
Use Figures 2-2 and 2-3 throughout this section.
Caution:
Pulling wires can cause damage to the electronic components. Use extreme care when pulling wires
into the remote enclosure.
In applications where the flow element is located in an explosive environment, isolate the conduit
before it leaves the environment. A potting Y may be used to provide the isolation.
Minimum Wire Size
Table 2-1 shows the smallest (maximum AWG number) copper wire that should be used in the electrical cables.
Use a lower gauge of wire for less of a voltage drop. Contact FCI concerning greater distances than those listed in
the chart.
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2 - 3
Model MT91 Multipoint Flowmeter
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CHAPTER 2 - INSTALLATION
Table 2-1. Interconnecting Cable Size (AWG)
Maximum Distance for AWG
Connection
10 ft.
(3m)
50 ft.
(15m)
100 ft.
(31m)
250 ft.
(76m)
500 ft.
152m)
1000 ft.
(305m)
AC Power
22
22
22
20
18
16
Relay (2A)
28
22
20
16
12
10
Flow Element Wires*
24
24
24
22
22
18
*Requires a shielded cable which is connected to the Flow Transmitter
Remote Hardware
Figures A-3 and A-4 show the remote enclosures along with physical dimensions to properly mount the flow
transmitter. Select a location for the flow transmitter within 1000 feet of the flow element. This location should be
easily accessible with enough room to open the enclosure cabinet door or remove a panel at any time. Secure the
flow transmitter solidly to a vertical surface capable of providing support. Use nuts and bolts to secure the flow
transmitter.
Power Connection Information
Note:
The installation of an AC line switch between the AC power source and the flowmeter is recommended.
This facilitates easy power disconnection and is an added safety feature.
The flow element power supply is not field selectable. Connect 85-265 Vac operating power and a power ground to
the flow transmitter. Follow the appropriate procedure below to connect power.
NEMA 4 Remote Enclosure
Install the customer supplied conduit and/or cable through the 1 inch female NPT ports. Remove the terminal block
shield located at the top right hand corner on TB1 and wire according to Figure 2-2.
Rackmount Remote Enclosure
Install the customer supplied conduit or cable though the back side of the enclosure. Remove the terminal block
shield located on the left wall (looking from the rear) on TB1 and wire according to Figure 2-2.
Sensing Point Connections
There are up to 16 different sensing points per flow transmitter. Sensing point 1, on the flow element, is the point
closest to the local enclosure. Sensing point 2 is the next down, etc.
In the local enclosure, sensing points are identified on the terminal board. For example, TB1-HD1 connects to
sensing point 1. In the remote enclosure, sensing points are identified by the connector number. For example, J1
corresponds to sensing point 1.
1.
Run eight-conductor-shielded cable from the local enclosure to the remote enclosure for each sensing point. Use
Table 2-1 to determine which wire gauge to use.
2.
In the local enclosure is an 8-pin connector for each sensing point, wire each cable to a connector per Figure 2-2.
Note: Before inserting the cable wires into the terminal strip connector, turn the screw counterclockwise 7 turns.
If this is not done, it is possible to insert the wire between the top half of the clamp and the frame instead of
between the two clamp segments.
3.
Tag the cables to clarify which cable connects to which sensing point. Follow the appropriate procedure below
to connect sensing points.
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
CHAPTER 2 - INSTALLATION
FLUID COMPONENTS INTL
NEMA 4 Remote Enclosure
1.
In the remote enclosure is a 10-pin connector for each sensing point. Open the enclosure door and remove
connectors. Wire each cable to a connector per Figure 2-2.
Note: Do not wire to HBS and HBX.
2.
Plug the connectors back into the appropriate sockets, matching sensing point number to each socket number.
For example, connect sensing point #1 to socket J1. See Figure A-2.
3.
After connecting all sensing points, secure door of enclosure.
Rackmount Remote Enclosure
Warning:
High voltage is present on the inside of the right panel. Ensure that power is off before proceeding.
1.
Remove the left panel to access connectors J1 through J6. Pull the panel away from the instrument and remove
the ribbon cable from the display card connector (J18).
2.
Remove the right panel to access connectors J7 though J16.
3.
In the remote enclosure is a 10-pin connector for each sensing point. Remove connectors and wire each cable to
a connector per Figure 2-2.
Doc. No. 003185 Rev. B
2 - 5
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 2 - INSTALLATION
Figure 2-2. MT91 Wiring Diagram
Model MT91 Multipoint Flowmeter
2 - 6
Doc. No. 003185 Rev. B
CHAPTER 2 - INSTALLATION
FLUID COMPONENTS INTL
Figure 2-3. Flow Transmitter Outline for NEMA 4 and Rackmount Remote Enclosures
Doc. No. 003185 Rev. B
2 - 7
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
Note:
CHAPTER 2 - INSTALLATION
Do not wire to HBS and HBX terminals.
3.
Plug back in the connectors to the appropriate sockets, matching sensing point number to each socket number.
For example, connect sensing point 1 to socket J1. See Figure 2-3.
4.
After connecting all sensing points, plug the display ribbon cable back into J18 and secure panels of enclosure.
Customer Connections
Analog Output Board - Assy #015231 (see Figure 2-3 for location)
Note:
If a different jumper position is selected other than the factory calibrated position, a complete re-calibration
of the analog output board will be necessary. See Chapter 3 for how to calibrate the analog output board.
Jumper J2
This jumper provides three output options for channel 1. Select one and place the jumper in the corresponding
position. See Figure 2-2 for jumper location.
Ÿ 4 to 20 milliamperes
Ÿ 0 to 10 volts
Ÿ 0 to 5 volts
Jumper J3
This jumper provides three output options for channel 2. Select one and place the jumper in the corresponding
position. See Figure 2-2 for jumper location.
Ÿ 4 to 20 milliamperes
Ÿ 0 to 10 volts
Ÿ 0 to 5 volts
Connector J4
This connector interfaces with customer instrumentation. Refer to Table 2-2 for signal information.
Table 2-2. Connector J4 Signal Information
Signal (Power Isolated)
Description
Vout2-
Channel 2 voltage output return.
Connected to system signal ground.
Vout2+
Channel 2 voltage output signal.
0 to 5 Vdc or 0 to 10 Vdc
MA2-
Channel 2 current output return.
Connected to system signal ground
MA2+
Channel 2 current output signal.
0 to 22 mAdc
Vout1-
Channel 1 voltage output return.
Connected to system signal ground.
Vout1+
Channel 1 voltage output signal.
0 to 5 Vdc or 0 to 10 Vdc
MA1-
Channel 1 current output return.
Connected to system signal ground.
MA1+
Channel 1 current output signal.
0 to 22 mAdc
Model MT91 Multipoint Flowmeter
2 - 8
Doc. No. 003185 Rev. B
CHAPTER 2 - INSTALLATION
FLUID COMPONENTS INTL
Relay Output Board - Assy #015235 (see Figure 2-3 for location)
One relay output board supports up to 2 relays. Relays 3 and 4 are not associated with Analog Output Channels and
are optional.
Connector J1
This connector interfaces with the flow transmitter backplane board.
Relays 1 and/or 2
Relays 3 and/or 4
Relay Board J1 connects to Backplane Board J21
Relay Board J1 connects to Backplane Board J22
Connector J2
This connector provides the relay outputs for relay 1 or 3, depending on which backplane connector J1 is associated.
Refer to Table 2-3 for signal information.
Connector J3
This connector provides the relay outputs for relay 2 or 4, depending on which backplane connector J1 is associated.
Refer to Table 2-3 for signal information.
Table 2-3. Connector J2 and J3 Signal Information
Signal (Power Isolated)
Description
EXT1-
Relay 1 external signal drive signal.
Open collector of NPN transistor.
+30 Vdc Max.
EXT1+
Fused connection to +24 Vdc
Fuse rating is 1/16 A (62.5 mA)
NC1A
Relay 1A Normally Closed terminal.
Continuity with COM1A when
relay is de-energized
COM1A
Relay 1A Common terminal.
NO1A
Relay 1A Normally Open terminal.
Continuity with COM1A when
relay is energized.
NC1B
Relay 1B Normally Closed terminal.
Continuity with COM1B when
relay is de-energized.
COM1B
Relay 1B Common terminal.
NO1B
Relay 1B Normally Open terminal.
Continuity with COM1B when
relay is energized.
EXT2-
Relay 2 external signal drive signal.
Open collector of NPN transistor.
+30 Vdc Max.
EXT2+
Fused connection to +24 Vdc.
Fuse rating is 1/16 A (62.5 mA)
NC2A
Relay 2A Normally Closed terminal.
Continuity with COM2A when
relay is de-energized
COM2A
Relay 2A Common terminal.
NO2A
Relay 2A Normally Open terminal.
Continuity with COM2A when
relay is energized.
NC2B
Relay 2B Normally Closed terminal.
Continuity with COM2B when
relay is de-energized.
COM2B
Relay 2B Common terminal.
NO2B
Relay 2B Normally Open terminal.
Doc. No. 003185 Rev. B
2 - 9
Continuity with COM2B when
relay is energized.
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 2 - INSTALLATION
Serial Communication Ports - Backplane Board Assy # 015206 (see Figure 2-3 for
location)
Connector J17 - EIA-232
This connector provides serial communications for compatible equipment. Refer to Figure 2-4 for wiring
configuration.
Connector J23 - 4-20 mA
This connector provides analog communication for compatible equipment. Refer to Figure 2-2 for wiring
information.
Connector J24 - EIA-422/EIA-485
This connector provides serial communication for compatible equipment for a EIA-422 port or EIA-485 port. To
use the EIA-422 connection, wire according to Figure 2-2 and 2-5. To use the EIA-485 connection, wire only the
GND, RX+, and RX- according to Figure 2-2 and 2-5. Multiple instruments can interface with the host system with
the EIA-485 connectors.
EIA-232
Connector
5
3
2
GND
TX
RX
Host
GND
TX
RX
Ground
Transmit Data
Receive Data
C00287-1
Figure 2-4. Wiring Diagram for Serial Connector EIA-232
EIA-422
Connector
GND
RX+
RX TX+
TX -
Flow
Transmitter #1
GND
RX+
RX TX+
TX Instrument #2
GND
RX+
RX TX+
TX -
5
4
3
2
1
Host
GND
TX TX+
RX RX+
EIA-485
Connector
Ground
Transmit Data Return
Transmit Data
Receive Data Return
Receive Data
Host
GND
TX TX+
5
4
3
2
1
Ground
Transmit Data Return Transmit Data +
EIA-485
Connector
5
4
3
2
1
Figure 2-5. Wiring Diagram for Serial Connectors EIA-422 & EIA-485
Model MT91 Multipoint Flowmeter
2 - 10
Doc. No. 003185 Rev. B
CHAPTER 2 - INSTALLATION
FLUID COMPONENTS INTL
Installation Quick-Check List
1.
Verify that serial numbers match.
2.
Be sure the FLAT and FLOW ARROW are properly oriented.
3.
Ensure there are no leaks at the process connection.
4.
Verify that the wiring is properly connected per the appropriate diagram.
Proceed to Chapter 3 - Operation to begin power-up sequence.
Doc. No. 003185 Rev. B
2 - 11
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
Model MT91 Multipoint Flowmeter
CHAPTER 2 - INSTALLATION
2 - 12
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
3. Operation
Caution:
The flow transmitter contains electrostatic discharge (ESD) sensitive devices. Use standard ESD
precautions when handling the flow transmitter. See Chapter 2, Installation for ESD details.
Introduction
The flowmeter has been configured and calibrated to customer specifications. Each flowmeter contains distinct
operating limits and units of measurement. This chapter will show how to determine and manipulate the
configuration of the flowmeter.
Start Up
Verify the wiring before applying power. Also verify the correct power connections have been made to the flow
transmitter.
1.
Apply Power.
2.
Wait 5 minutes for the unit to warm-up and stabilize.
3.
The flowmeter evaluates sensing points as out-of-range until they have warmed up to operating temperature.
The flowmeter displays a system status message of "Check Heads" until all sensing points are functioning
within their calibrated range. This status message should change to the normal display of "System OK" within
the 5 minute warm-up period. The output signal displayed should be representative of the estimated or
calculated current process media flow.
4.
The unit automatically enters the flow metering mode and the display sets to normal operation.
The flowmeter outputs should now indicate the mass flow rate in the desired units of measure.
In the event that the display or the "System OK" message does not appear, or the values are out-of-range or
obviously incorrect, then turn the power off and proceed to Chapter 5 - Troubleshooting.
Using the MT91 Software with Display
Display
The flowmeter contains a 4 x 20 character LCD display. Flow rate, temperature, and system status are all accessible
through the display.
Menu Window
Four components make up the menu window. They are the menu level, title, selections, and prompt line. These
components are illustrated in Figure 3-1. The top line displays a menu level and title. Lines two and three are used
to scroll through available options. The prompt line indicates which menu commands are appropriate.
Title
2.1.1 FLOW
1=Velocity
2=Volume
N=MORE UP HOME
Available Selections
Prompt Line
Menu Code
C00219-1
Figure 3-1. The Menu Window
Doc. No. 003185 Rev. B
3 - 1
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
The menu level is a numeric reference which identifies each window of the menu structure. The menu level in
Figure 3-1 indicates that the user is three levels deep (Level 2, sublevel 1, sub-sub-level 1). This example code can
be associated functionally as 2(SETUP).1(DISPLAY).1(FLOW). Occasionally, the depth of the menu makes
displaying the complete menu level impractical. When this happens, the special character “>” indicates that the
menu level may be deeper than the code indicates (e.g. “2.2.3.1>RLY[1] MODE” ).
The title gives the user a better idea of where the system is within the menu structure. Some titles are informative
enough to completely describe the menu function, while other titles are ambiguous unless the parent menus are
known.
Other Window Types
Another common window encountered is a non-scrolling menu. The window is similar to the menu window except
that does not scroll and all choices are contained within the window. The current selection (if there is one) is also
contained in the parenthesis to the left of the question mark.
Menu Control
The prompt line and available selections display key strokes for that menu level. If a key is pressed that is not valid
for that menu, the screen will stay the same. The key pad layout is shown in Figure 3-2.
1
2
3
Y
N
4
5
6
_
.
7
ENTR
8
0
9
#
P
HOME
UP
C00220-1
0-9
Enter numbers
Y
Yes to prompts
N
No to prompts; more display
-
minus sign
.
decimal point
←
backspace
P
no special use
ENTR
accepts current value
HOME
return to main menu
UP
backup one menu level
Table 3-1. Key Functions
Figure 3-2. Keypad Layout
See Table 3-1 for key pad assignments. At any time, press the HOME key to display the main menu.
HOME can be used to escape from calibration routines, restart a progression into the menu structure, or
quickly change from one area of the menu to another.
When N=MORE is displayed on the prompt line, more than two menu selections are available. Press N to
scroll through all the selections.
When UP is displayed on the prompt line, the UP key can be used to back out of menus. The menu moves
back one level each time the UP key is pressed.
To make a selection, press the numeric key associated with the desired menu selection. The selection does
not have to be displayed, but it must be one of the available selections.
Every path through the menu will eventually cause control to pass from the menu structure to a routine that
performs a task such as change a parameter value, initiate a test, or calibrate the system hardware. Some of
these routines still provide selections that emulate the menu structure. When the system is operating outside
the menu structure, there are subtle differences in the user interface. For example, the UP key may have no
affect or the prompt line won't appear.
Menu Organization
The top level of the menu is shown in Figure 3-3. The menu structure is divided into four major groups, a
display function, and the revision display.
Model MT91 Multipoint Flowmeter
3 - 2
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
•
The first menu option places the units display into the normal display mode. When the system is in this mode,
flow and/or temperature measurements are displayed. While in the normal display mode, pressing any key will
cause the main menu to display.
•
The Setup group presents the options for customizing the system inputs and outputs. Most of the settings will
be made through menus in this group.
•
The diagnostics group provides displays that help isolate problems and test the system integrity.
•
The calibration group is used primarily by factory technicians, but there are displays that can be helpful to the
customer.
•
The verify group provides a means to view the values of important system parameters.
•
Finally, the firmware version is available for display.
0.0 MAIN MENU
1=Normal Display
2=Setup
3=Diagnostics
4=Calibration
5=Verify
6=Version
7=Time Delay
Normal Display
CH1: 47.8 SF/S
CH2: 89.2 F
K1 K2
System OK
2.0 SETUP
1=Display
2=Outputs
3=Communications
4=Configuration
5=Password
6=Clock
3.0 DIAGNOSTICS
1=System Status
2=Output Tests
3=Calibration Tests
4=Schedule Tests
4.0 CALIBRATION
1=Cal Initialize
2=Cal Inputs
3=Cal Outputs
4=Cal Flow
5.0 VERIFY
1=Verify Setup
2=Verify Cal
Version x.xx
Release Date
dd-mm-yy
7.0 TIME DELAY
Enter Minutes:
(1)
?
2.1 DISPLAY
1=Flow
2=Temperature
3=Screen Setup
2.2 OUTPUTS
1=Assign Heads
2=Analog
3=Relays
4=Filter
5=Corrections
2.3 COMMUNICATIONS
1=Mode
2=Baud
3=Protocal
4=RS-485 Address
2.4 CONFIGURATION
1=Setup User Config
2=Setup Factory Cfg
3=Save Config
2.5 PASSWORD
1=Change User PW
2=Enable PW
2.6 SET CLOCK
1=Set Clock
2=Auto Offset
5.1 VERIFY SETUP
1=Flow
2=Temp
3=Outputs
4=Communication
5.2 VERIFY CAL
1=Inputs
2=Outputs
3=Flow
7.0 TIME DELAY
Output Frozen
Press any key to stop
Time Left: 0:07
3.1 SYSTEM STATUS
1=Sensors
2=Heaters
3.2 OUTPUT TESTS
1=Analog Output Test
2=Relay Test
3.3 CALIBRATION
TESTS
1=Start Test
2=Display Results
3.4 SCHEDULE TESTS
1=Calibration Drift
2=Enable Auto Test
4.1 CAL INITIALIZE
1=All Cal Parms
2=Input Cal Parms
3=Output Cal Parms
4=Flow Cal Parms
5=Misc Cal Parms
4.2 CAL INPUTS
1=Sensor Type
2=Excitation
3=Heaters
4=Normalize to R
5=Unipolar rR & dR
6=Bipolar rR & dR
7=Display dV &dV
4.3 CAL OUTPUTS
1=Analog Outputs
4.4 CAL FLOW
1=Coefficients
2=Limits
3=Temp Comp
4=Offset
C00221-1.vsd
Figure 3-3
Doc. No. 003185 Rev. B
Menu Flowchart
3 - 3
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
Quick Custom Setup
In order to use the quick operation procedure, an assumption has been made that the password is enabled (this is the
factory preset condition).
If mistakes in data entry are made, press the back arrow key to correct mistake.
Menu level refers to the sequence of key to press to reach a particular function from the MAIN MENU. For
example, to go to menu level 2.2.1, press HOME, 2, 2, and 1.
Y/N refers to Y Save Permanently or Change Parameter or N Do Not Save Permanently or Do Not Change
Parameter.
Using Main Functions
MAIN MENU
Press HOME.
Returns user to MAIN MENU. In some cases, it may be necessary to press
HOME more than once.
NORMAL DISPLAY
menu level 1.
To view the NORMAL DISPLAY
DelR and RefR
menu level 4.2.5
To view a sensing point's raw signal DelR and RefR. When prompted, enter
the number of the sensing point to be viewed.
PASSWORD
menu level 2.5.1.2
Enable or Disable the PASSWORD
PASSWORD
menu level 2.5.1.1
Change the user PASSWORD. If the password protection is enabled, the
user must enter the current password.
Selecting Units of Measurement
After reaching the menu level, select the combination of units that will produce the desired end result.
Velocity units
menu level 2.1.1.1
Length
1=FT, 2=M and
Time
1=Sec, 2=Min, 3=Hrs, 4=Day
Volume units
menu level 2.1.1.2
Volume
1=SCF, 2=NCM, 3=NLP
Area
1=Square Feet, 2=Square Meters
Area Value
enter the area of the duct
Time
1=Sec, 2=Min, 3=Hrs, 4=Day
Mass units
menu level 2.1.1.3
Mass
1=LBM, 2=KG, 3=TON, 4=TONNE
Area
1=Square Feet, 2=Square Meters
Area Value
enter the area of the duct
Time
1=Sec, 2=Min, 3=Hrs, 4=Day
Temperature units
menu level 2.1.2
1=°F 2=°C 3=K 4=°R
Model MT91 Multipoint Flowmeter
3 - 4
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
Setting Up Analog Outputs
Sensing Point Outputs
menu level 2.2.1
Channel
1=Chan 1 2=Chan 2
After selecting a channel, the menu automatically provides new
selections to assign sensing points.
Sensing Points 1=Add All Heads 2=Add Head 3=Del All Heads
4=Del Head 5=View Assigned 6=Save
An "X" will mark on the display to show which sensing points are assigned
to the selected channel. To keep changes, user must save assignments.
Output Parameters
menu level 2.2.2
Channel
1=Chan 1 2=Chan 2
After selecting a channel, the menu automatically provides new
selections to set output parameters.
Output Signal*
Mode
Full Scale
Port Zero
1=0-5V 2=0-10V 3=4-20mA
1=Flow 2=Temp
enter a value
enter a value
*Set Jumpers to match. See Chapter 2.
Setting Up Relays
Relays 1 and 2 can be set as switch points or test/status parameters. If relays 1 or 2 are used for switch
points, their mode must correspond to their respective analog output channels. (e.g. If relay 1 is set to
be a flow switch point, then analog output channel 1 must be in the flow mode.) If relays 1 or 2 are set
to flow or temperature modes, the user MUST set switch point and hysteresis parameters. If this is not
done, a chattering noise will be heard. Relay 3 and 4 can only be set as test/status parameters.
Relay Mode
menu level 2.2.3.1
Relay
1=Rly #1 2=Rly #2 3=Rly #3 4=Rly #4
After selecting a relay, the menu automatically provides new
parameters to set the mode.
1=View Mode 2=Flow 3=Temperature
4=System Status 5=Zero Test 6= Span Test.
Switch Points
menu level 2.2.3.2
Relay
1=Rly #1 2=Rly #2 3=Rly #3 4=Rly #4
After selecting a relay, the menu automatically provides new
parameters to set the switch point.
1=View Sw. Pt. 2=Above 3=Below
4=Inside 5=Outside
Hysteresis
Doc. No. 003185 Rev. B
menu level 2.2.3.3
Relay
1=Rly #1 2=Rly #2 3=Rly #3 4=Rly #4
3 - 5
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
In-Depth Custom Setup Procedure
When a flowmeter leaves the factory, it is configured to the application information know at the time of order. At
installation time; however, changes to the factory settings may be necessary. There are several parameters that can
be modified to customize the system. This section describes how to customize the flowmeter.
Menu level refers to the sequence of key to press to reach a particular function from the MAIN MENU. For
example, to go to menu level 2.2.1, press HOME, 2, 2, and 1.
Each time a system parameter is changed, the display will prompt the user to save the change. For the change to
endure through power off periods or a system reset, press Y. For a temporary change, press N. When changes are
not saved, the user can restore the previous settings by cycling the input power or pressing any key for more than 10
seconds to reset the system.
In most cases, the existing value of the parameter that is changing will be displayed. If no change is required, press
ENTR, select it again, or press HOME.
Since the flowmeter has multiple inputs and outputs, some parameters are stored in groups. For example, the analog
output parameters apply to both channels one and two. The menu level to change the analog output parameters will
prompt the user to select a channel. After making changes to that channel, back out of and re-enter the menu level to
make changes to the other channels. Use either the UP key or the HOME key to back out of the menu level.
Password Protection
Before customizing the flowmeter configuration, the customer must have access to the system parameters. Two
levels of password protection affect access to these parameters.
Factory Level
The highest level of protection requires a factory password for access. This password prevents inadvertent changes
to variables associated with the system calibration, sensing point type, and other parameters that require factory
resources to properly set.
User Level
The second level of protection requires a user password for access. This password provides the customer with the
ability to limit access to parameters that affect the way the system operates.
Both levels of password protection can be enabled or disabled. When the system leaves the factory, the factory level
protection will be enabled and the user level will be left disabled. No password is required to enable a level of
protection, but the appropriate password is required to disable protection.
Note: The user password is set to “123” when the system is shipped.
Ø
To edit the user password
1.
Go to menu level 2.5.1 (SetupÞ PasswordÞ Change User PW).
2.
If current user password if it is enabled, enter the current password, then press ENTR.
3.
Enter desired password, then press ENTR.
Ø
To enable and disable user password protection
1.
Go to menu level 2.5.2 (SetupÞ PasswordÞ Enable PW).
2.
If user password is already enabled, enter password. Select 2=Disable to disable password.
3.
If user password is not enabled, select 1=Enable to enable the password.
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
Selecting Units of Measure
Internally, the unit will always work in units of standard feet per second (SF/S) and degrees Fahrenheit (°F). The
user can choose from several types of units for display and output scaling. Table 3-2 shows the units of measure and
their abbreviations for temperature and flow.
Table 3-2. Units of Measure and Abbreviations
Temperature
Length*
Volume*
Mass
Time
Fahrenheit (°F)
feet (SF)
cubic feet (SCF)
pounds mass (LB)
seconds (S)
Celsius (°C)
meters (NM)
cubic meters (NCM)
kilograms (KG)
minutes (M)
liters (NLP)
English ton (TON)
hours (H)
metric tonnes (TONNE)
days (D)
Kelvin (K)
Rankine (°R)
*Length and Volume units are based on FCI standard conditions (70°F and 14.7 PSIA); therefore,
the units are preceded with an S.
A sequence of selections is required to set a new unit of measure for flow. At each step through this process, the
existing unit will be displayed, even if it’s undefined, and the user will be prompted to change it. Only Y or N will be
acceptable responses to the prompts. To properly set new units, complete the menu entries until the new flow unit is
displayed. If the change is only temporary, don’t save any settings during the process.
Note: If only some of the settings in this process are saved, the units of measure may be incorrect after a system
reset or power up.
The output may not conform to the units displayed if after partially completing the selection of new units,
HOME or the hardware reset are used to exit the process.
Ø
To set a new unit of measure for flow rate:
1.
Go to menu level 2.1.1 (SetupÞ DisplayÞ Flow). Select from the following three options: 1 Velocity,
2=Volume, or 3=Mass and then follow the corresponding procedure below.
w
To set velocity units:
2.
Select 1=Velocity.
3.
The program will prompt the user to change the units of length first. Select from the following units: 1=Feet or
2=Meters.
4.
The program will prompt the user to change the units of time next. Select from the following units: 1=Seconds,
2=Minutes, 3=Hours, 4=Day. The units of velocity will display, press any key to exit to menu level 2.1.1.
w
To set volume units:
2.
Select 2=Volume.
3.
The program will prompt the user to change the units of volume first. Select from the following units:
1=SCF - standard cubic feet, 2=NCM - normal cubic meters, or 3=NLP - normal liter per.
4.
The program will prompt the user to change the units of area. Select from the following units: 1=Square Feet or
2=Square Meters.
5.
The user will be prompted to change the value of the area. Enter a numeric value for the area.
6.
The user will be prompted to change the units of time. Select from the following units: 1=Seconds, 2=Minutes,
3=Hours, or 4=Day. The selected units of volume will display, press any key to exit to menu level 2.1.1.
Doc. No. 003185 Rev. B
3 - 7
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
w
To set mass units:
2.
Select 3=Mass.
3.
The user will be prompted to change the units of mass first. Select from the following units:
1=LBM - pounds mass, 2=KG - kilograms, 3=TON - English ton, or 4=TONNE - metric ton.
4.
The user will be prompted to change the units of area. Select from the following units:
1=Square Feet or 2=Square Meters.
5.
The user will be prompted to change the value of area. Enter numeric value for area.
6.
The user will be prompted to change the units of time. Select from the following units: 1=Seconds, 2=Minutes,
3=Hours, 4=Day. The units of mass will display, press any key to exit to menu level 2.1.1.
Ø
To set a new unit of measure for temperature:
1.
Go to menu level 2.1.2 (SetupÞ DisplayÞ Temperature).
2.
Select from the following units: 1=°F - degrees Fahrenheit, 2=°C - degrees centigrade, 3=K - Kelvin, or
4=°R - degrees Rankine.
Selecting the Normal Display Screen
There are two formats for displaying flow information. These formats are referred to as screen 1, and screen 2.
Figure 3-4 shows an example of both screens.
CH1: 21320 LB/H
CH2: 96.2F
K1 K2
SYSTEM OK
Sensor[1]=65.4SF/S
Sensor[2]=63.2SF/S
Sensor[3]=66.0SF/S
Sensor[4]=65.2SF/S
Screen 1
Screen 2
C00222-1
Figure 3-4. Normal Display Screen 1 and Screen 2
Screen 1 provides numeric output for the two analog channels.
Screen 2 provides for the display of velocity at four points simultaneously. Many systems use only four points. This
display is useful when comparing the instrument with a Pitot traverse, or observing the flow profile.
Ø
To select screen 1 or 2:
1.
Go to menu level 2.1.3 (SetupÞ DisplayÞ Screen Setup).
2.
Select from the following options: 1=Screen 1 or 2=Screen 2.
Assigning Sensing Points to Outputs
The first step to processing a sensing point input is to assign the sensing point to an output channel. There are two
channels in the flowmeter. Assign any combination of one to sixteen sensing points signals to either or both
channels.
Ø
To assign sensing points to outputs:
1.
Go to menu level 2.2.1 (SetupÞ OutputsÞ Assign Heads).
2.
Select output channel, 1=Chan 1 or 2=Chan 2.
3.
Select from the following options:
1=Add All Heads - this will assign all sensing points to the selected output channel;
2=Add Head - this will assign one sensing point at a time, the user can enter up to 16 different sensing points;
3=Del All Heads - this is used to clear all assigned sensing points from the selected channel;
4=Del Head - this is used to delete one sensing point at a time; or
5=View Assigned - the user can view the current sensing points assigned to the selected channel for 2 seconds.
Model MT91 Multipoint Flowmeter
3 - 8
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
2.2.1 CHAN 1 HEADS
1...5....0....5.
xxxx.............
Enter Head #?
C00223-1
Figure 3-5 Assign Heads Displays
4.
Figure 3-5 shows the display when adding or deleting heads. The ‘x’ signifies a selected head. To add or delete
a head, enter the number of the head, then press ENTR. When finished, press ENTR again without an entry.
5.
Select 6=Save to ensure survival of the changes through resets and power cycles.
Setting Analog Outputs
The analog output channels are defined by four parameters: zero, minimum flow, maximum flow, and full scale.
Figure 3-6 shows how these parameters affect the output.
Figure 3-6. Analog Output
Full scale represents the flow or temperature value that corresponds with the maximum output signal.
Zero represents the flow or temperature value that corresponds with the minimum signal output. Minimum signal
output can be set to indicate a flow of zero. This is often referred to as a zero-based signal output. A minimum
signal that represents a value greater than zero is referred to as non-zero based.
Minimum and maximum flow are factory set parameters that do not appear as options in this menu level. Until the
minimum flow value is reached, the output will remain at the zero level. Once the minimum flow threshold is met or
exceeded, the output signal will jump to the value determined by the zero and full scale settings.
Output signal is physically selected with a jumper setting as described in Chapter 2. 0-5 Vdc, 0-10 Vdc and 4-20
mA are the available options.
Mode defines the channel as a flow or temperature output.
Ø
To set analog outputs:
1.
Go to menu level 2.2.2 (SetupÞ DisplayÞ Analog). Select 1=Chan 1 or 2=Chan 2.
2.
Select 1=Output Signal. Then select from the following options: 1=0-5V, 2=0-10V, or 3=4-20mA.
3.
Select 2=Mode. Then select from the following options: 1=Flow or 2=Temp.
4.
Select 3=Full Scale. Enter a numeric value, then press ENTR to accept it.
5.
Select 4=Port Zero. Enter a numeric value, then press ENTR to accept it.
Note: If a different output signal is selected other than the factory calibrated output, a re-calibration of the analog
output board will be necessary. See following procedure. Ensure that the corresponding jumper is placed
in the correct position. See Chapter 2 for jumper positions.
Doc. No. 003185 Rev. B
3 - 9
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
Ø
CHAPTER 3 - OPERATION
To calibrate the analog output boards:
The analog output board calibration parameters are saved on the controller board. Therefore, analog output boards
are not interchangeable.
Tools needed:
DVM (4 1/2 digit minimum)
Calibrated 250W resistor
1.
Turn off the power to the flowmeter.
2.
Set both jumpers on the analog output board to the output type selected above.
3.
Connect a DVM to the appropriate connection of the analog output board. Use a precision 250ohm resistor if
the output is 4 to 20mA.
4.
Apply power to the flowmeter.
5.
Go to menu level 2.2.2 (SetupÞ OutputsÞ Analog). Select the Channel 1. Press 1 to select output signal.
6.
Select appropriate signal type. Save selection if signal type was changed.
7.
Go to menu level 4.3.1 (CalibrationÞ CalOutputsÞ Analog Outputs). Select Channel 1.
8.
Press keys as indicated to reach 4mA for 4-20mA output signal or press ENTR (0) for 0-5Vdc output signal and
0-10Vdc output signal.
Note: The DVM may read 20-30mV for 0-10Vdc output signal or 10-15mV for 0-5Vdc output signal.
9.
Press keys as indicated to reach 20mA for 4-20mA output signal or press keys as indicated to reach 5.000Vdc
for 0-5Vdc output signal or press keys as indicated to reach 10.00Vdc for 0-10Vdc output signal.
10. Repeat steps 5 through 9 for Channel 2.
Setting Discrete Outputs
Four sets of relay contacts provide the user with discrete outputs. The relays can be assigned to the parameters
marked in Table 3-3.
Table 3-3. Relay Assignment by Parameters
Relay #
Flow
Temperature Calibration Test
Zero Test
Span Test
System Status
1
♦
♦
•
•
•
•
2
♦
♦
•
•
•
•
3
•
•
•
•
4
•
•
•
•
♦ Dependent on analog outputs
Ø
To set discrete outputs
1.
Go to menu level 2.2.3.1 (SetupÞ OutputsÞ RelaysÞ Mode)
2.
Select the relay to be set: 1=Rly #1, 2=Rly #2, 3=Rly #3, or 4=Rly #4.
Note: Only relays 1 and 2 can be set as switch points.
Model MT91 Multipoint Flowmeter
3 - 10
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
3.
FLUID COMPONENTS INTL
Select from the following options:
1=View Mode - this can be used to verify current setup;
2=Flow - select this if a switch point is going to be set;
3=Temperature - select this if a switch point is going to be set;
4=System Status - this relay is used to notify the customer when the "System OK" is no longer displayed;
5=Zero Test - this is used with the Calibration Testing discussed in the next section. During the zero test phase
(4mA), the Zero Test relay is closed.
6=Span Test - this is used with the Calibration Testing discussed in the next section. During the full scale test
phase (20mA), the Span Test relay is closed.
During the mid range test phase (12mA), both the Zero and Span Test Relays are closed.
If assigned, the test/status relays are ready to be connected to customer equipment.
When assigned to flow or temperature, relays 1 and 2 are affiliated directly with analog output channels 1 and 2,
respectively. For this reason, relay 1 can only be assigned as a flow or temperature switch point when analog output
channel 1 is assigned as a flow output for flow switch or temperature output for temperature switch. The same
applies to relay 2.
Switch points are not appropriate for the test/status parameters since they are already discrete signals. Relays 1 and 2
can be assigned as switch points or as test/status parameters. As switch points, when the signal level crosses into a
specified range, the relay will activate. Hysteresis can be set to prevent the relay from chattering at the switch point
threshold.
The user can choose from four sets of switch point ranges. These are referred to as above, below, inside, and
outside. With hysteresis, the relay will deactivate at a different threshold than at which it activates. Figure 3-7
illustrates the four switch point ranges with arbitrary hysteresis assigned.
Flow
or
Temperature
ON
OFF
OFF
OFF
ON
OFF
ON
ON
Above
Below
Switch point
Outside
Inside
} Hysterisis
Deactivation
C00225-1
Figure 3-7. Relay Switch Points Schemes
Ø
To set the switch points and hysteresis:
1.
Go to menu level 2.2.3.2 (SetupÞ OutputsÞ RelaysÞ Switch Points). Relays 1 or 2 must be in a flow or
temperature mode. See above section.
2.
Select 1=Rly #1 or 2=Rly #2. To view the current switch point settings select 1=View Sw. Pt. To set the switch
point follow one of the procedures below.
a.
Select 2=Above to activate the relay above a switch point value. Enter a numeric value for the upper
limit of the switch point. Press ENTR to accept the value.
b.
Select 3=Below to activate the relay below a switch point value. Enter a numeric value for the lower
limit of the switch point. Press ENTR to accept the value.
c.
Select 4=Inside to activate the relay if flow or temperature values approach the switch point from the
outside going inside. Enter a numeric value for the upper limit of the switch point range. Press ENTR
to accept the value. Enter a numeric value for the lower limit of the switch point range. Press ENTR to
accept the value.
Doc. No. 003185 Rev. B
3 - 11
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
d.
CHAPTER 3 - OPERATION
Select 5=Outside to activate the relay if flow or temperature values go outside the switch point range.
Enter a numeric value for the lower limit of the switch point range. Press ENTR to accept the value.
Enter a numeric value for the upper limit of the switch point range. Press ENTR to accept the value.
4.
Select 3=Hysteresis from menu level 2.2.3 Relays.
5.
Select 1=Rly #1 or 2=Rly #2. Enter a numeric value for the desired deactivation of the switch point. The
display will read "Recovers xxx", this is the deactivation point. Press ENTR to accept the value.
Note: The factory recommends that the password be enabled after making changes to the system parameters if it
has been disabled.
Daily Calibration Testing
The calibration error test interrupts the normal flow metering process to test for shifts or changes in parameters that
affect the calibrated accuracy of the flowmeter. This test can be manually initiated by using the keypad to make a
selection from the system menu, or it can be scheduled to automatically occur periodically with a 24-hour interval.
Both channels of the analog output card are driven to set values during the test. Figure 3-8 shows the screens that
will display during the calibration test sequence.
SELF TESTING
Heaters are OFF
2 minute 4 mA out
HOME to exit
SELF TESTING
Heaters are ON
3 minute warmup
HOME to exit
A
E
SELF TESTING
Heaters are OFF
2 minute 12 mA out
HOME to exit
B
SELF TESTING
Heaters are OFF
2 minute 20 mA out
HOME to exit
UNBALANCED HEADS
1...5....0....5.
x...............
(x = suspect)
C
F
SELF TESTING
Balancing Sensor 1
Please Wait
Press Home to Exit
Bal Dev
Low Dev
Mid Dev
Hi Dev
D
=
=
=
=
0.00%
0.00%
0.00%
0.00%
G
C00280-1
Figure 3-8. Calibration Test Display Screens
While screen A is displayed, the analog outputs are at a 4 mA or 0 Vdc level. While screen B is displayed, the
analog outputs are at a 12 mA, 2.5 Vdc or 5 Vdc. While screen C is displayed, the analog outputs are at 20 mA, 5
Vdc, or 10 Vdc. Each of these screens and corresponding outputs are sustained for two minutes. Screen D will
display for each sensing point that is assigned to the flowmeter. From this point until the conclusion of the test, the
analog output will be fixed at 4 mA. When screen E displays, the system has completed the calibration test and the
heaters have been turned back on.
Model MT91 Multipoint Flowmeter
3 - 12
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
Ø
To manually initiate the Calibration Test
1.
Go to menu level 3.3.1 (DiagnosticsÞ Calibration TestsÞ Start Test). The sequence of screens A through E will
display.
2.
To view the results of the test, select 2=Display Results, from the menu level 3.3. If the system is unable to
balance out one of the sensing points, the suspect head will be noted with an x as shown in screen F. If no
balance problems occurred, screen F will not display. Finally, screen G displays the deviation of the stimulated
signals from the expected results.
Ø
To set up the automatic Daily Calibration Test
w
Set the time of day.
1.
Go to menu level 2.6 (SetupÞ Clock). Enter the hour and press ENTR.
2.
Enter the minutes and press ENTR.
3.
Press any key to exit.
w
Set the time of the test.
1.
Go to menu level 3.4 (DiagnosticsÞ Schedule Tests).
2.
Select 1=Calibration Drift.
3.
Enter the hour and press ENTR.
4.
Enter the minutes and press ENTR.
5.
Enter the seconds and press ENTR.
w
Enable the automatic test.
1.
Go to menu level 3.4 (DiagnositcsÞ Schedule Tests).
2.
Select 2=Enable Auto Test.
3.
Select 1=Enable or 2=Disable.
With the daily automatic test enabled, the calibration drift test will run the same time each day. The normal outputs
will be driven to test values and the calculated results will be available for display.
Advanced Features
The remainder of this chapter contains topics that may not be applicable to every user of the flowmeter. In most case
the flowmeter will be ready for use straight out of the box. However, there may be instances where the advanced
features of the flowmeter may be needed. This section discusses how to correct for bias errors due to non-ideal
installations and how to communicate with the flowmeter through the serial port.
Flow Rate Correction Equation
The flow rate correction equation or corrector is used to bias the flow rate output. The correction equation contained
in the flowmeter allows the user to correct for bias errors due to non-ideal installation effects. The correction
equation is applied to the measured flow rate and then this corrected flow rate is used to drive the analog outputs and
manipulate the relays. The flow rate shown on the display is also the corrected value. The correction equation for
the flowmeter is shown below.
mnew = C1 + ( C2 × m0 ) + ( C 3 × m02 ) + ( C4 × m03 )
where
m0 = Measured Flow Rate
Ci = Correction Equation Coefficients (i = 1 through 4)
Default configuration is C1= 0, C2= 1, C3= 0, and C4= 0.
mnew = Corrected Flow Rate
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3 - 13
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
Application of the correction equation will be illustrated in the following example. Through analysis of the process
flow stream it is determined that the flow rate must be multiplied by 1.056 to output the desired value. The
correction equation takes the following form.
Example:
mnew = 0 + (1. 056 × m0 ) + ( 0 × m02 ) + ( 0 × m03 ) = 1. 056 × m0
where
C1 = 0
C2 = 1.056
C3 = 0
C4 = 0
A more complicated situation would be where the multiplication factor varies with the flow rate. Figure 3-9 shows
the variation of desired flow rate versus the measured flow rate.
50
40
Desired
Flow Rate
30
20
10
0
0
20
40
Measured Flow Rate
60
C00248-1
Figure 3-9. Desired Flow Rate Versus Measured Flow Rate
The relationship between the measured and the desired flow rates was determined through a least squares analysis.
The coefficients for the above relation are:
C1 = -7.5672
C3 = -0.037082
C2 = 2.09253
C4 = 0.0003505
Ø
To enter the correction equation coefficients and enable it:
1.
Go to menu level 2.2.5 (SetupÞ OutputsÞ Corrections).
2.
Press 2=Enter Correction. Enter the user password (if it enabled).
3.
Enter all the desired coefficients. When complete, press 6=Verify and Save. Scroll through the displayed
coefficients then save them if they are correct.
4.
Press ENTR and then 1=Enable. Select 1=Enable or 2=Disable.
Offset Adjustment of Sensing Points
Using the offset adjustment allows the customer to shift the calculated flow rate up or down to agree with another
reference instrument. FCI uses a balanced order polynomial equation to map the sensing point information to a
curve. The general form of this equation is shown below.
Flow = C1( ∆R −2 ) + C 2 ( ∆R −1 ) + C 3 + C 4 ( ∆R ) + C5( ∆R 2 )
Model MT91 Multipoint Flowmeter
3 - 14
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
Figure 3-10 illustrates the effect of adding an offset of plus 1 ohm and adding an offset of minus 1 ohm to the raw
signal.
Delta-R versus Flow
Flow (SF/S)
100.00
Flow
80.00
60.00
Plus 1 Ohm
40.00
Minus 1 Ohm
20.00
0.00
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
Delta R (Ohms)
Figure 3-10. Delta-R Versus Flow Rate
Ø
To enter an offset value:
1.
Go to menu level 4.4.4 (CalibrationÞ Cal FlowÞ Offset).
2.
Select 1=Offset Values. Enter sensing point number and value of desired offset. Units are always in ohms.
3.
Select 2=Enable Offset.
Applying the Filter
For applications with noisy flow profiles, the filter can be used to reduce jumps or oscillations in the output signal.
The flowmeter takes samples of the flow rate periodically at each active sensing point. If the current value jumps up
when the next sample is taken, applying the filter can help smooth this jump out. The rate at which a sample is taken
depends on the number of active sensing points. The more sensing points that are active, the longer the intervals
between samples.
Flow Signal
The filter strength acts stronger with increasing interval time. A filter strength of 2 for a 4-point system takes twice
as long to apply than a filter strength of 2 for a 2-point system. See Figure 3-11.
45
40
35
30
25
20
15
10
5
0
2-point system, Filter = 2
4-point system, Filter = 2
No Filter
Vs
Vn
Vc
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Time
Figure 3-11. Effects of Filter on Flow Signal Versus Time
Doc. No. 003185 Rev. B
3 - 15
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 3 - OPERATION
The filter uses the following equation to adjust the output signal.
(Vs − Vc )
f
Vn = New or desired value
Vc = Current Value
Vs = Sample Value
f = Filter Strength
Vn = Vc +
Ø
To change the filter strength:
1.
Go to menu level 2.2.4 (SetupÞ OutputsÞ Filter).
2.
Enter desired filter strength.
Serial Communications
The flowmeter has one serial port that can be configured to use one of three EIA standard interfaces: EIA-232C,
EIA-422, or EIA-485. The data transfer rate can be set to either 4800, 9600, or 19200 baud. The number of bits in a
character is set to eight, and no parity bit is used.
Ø
To use serial communications:
1.
Go to menu level 2.3.3 (SetupÞ CommunicationsÞ Protocol).
2.
Select 1=Pro1 or 3=Pro 3. Protocol 1 is a command and response protocol. Protocol 2 is not defined. Protocol
3 is a limited command and response protocol used to extract flow and raw signal data for up to 4 sensing points.
3.
Set the data transfer rate, character bits, and parity bit on the host system.
4.
To use protocol 1, refer to Table 3-4 for a list of commands and responses. These commands must be entered in
capitalized letters to be recognized by the system.
5.
To use protocol 3, use the single character 'F' (flow) followed by a carriage return to display 4 sets of flow
values. Use the single character 'R' (resistance) to display 4 sets of sensing point resistance values.
Time Delay
The time delay function freezes the outputs for an operator specified time period.
Ø
To use time delay:
1.
Go to menu level 7.0 (Time Delay).
2.
Enter the amount of time in minutes desired for the delay length.
3.
The instrument will count down the time, while freezing the output. Any key can be pushed to exit the time
delay. When the time has expired the instrument will continue with normal operation.
Model MT91 Multipoint Flowmeter
3 - 16
Doc. No. 003185 Rev. B
CHAPTER 3 - OPERATION
FLUID COMPONENTS INTL
Table 3-4. Commands and Responses for Protocol 1
Command
System Response
Description
SFPnn
X.XXXXXXXXX
Linear flow in SF/S for sensor nn
SFOPn
X.XXXXXXXXX
Average flow of output n (see SFUNI)
STPnn
X.XXXXXXXXX
Standard Temperature (F) of sensor nn
STOPn
X.XXXXXXXXX
Average temp of output n (see STUNI)
SSHnn
X
Status of sensor nn. 1 - ok, 0 - not ok
SCBnn
X.XXXXXXXXX
Bias offsets for sensor nn ( Ohms )
SC1nn
X.XXXXXXXXX
Linearization coefficient 1 for sensor nn
SC2nn
X.XXXXXXXXX
Linearization coefficient 2 for sensor nn
SC3nn
X.XXXXXXXXX
Linearization coefficient 3 for sensor nn
SC4nn
X.XXXXXXXXX
Linearization coefficient 4 for sensor nn
SC5nn
X.XXXXXXXXX
Linearization coefficient 5 for sensor nn
SI1nn
X.XXXXXXXXX
Reference Gain cal. factor for sensor nn
SI2nn
X.XXXXXXXXX
Reference Offset cal. factor for sensor nn
SI3nn
X.XXXXXXXXX
Active Gain cal. factor for sensor nn
SI4nn
X.XXXXXXXXX
Active Offset cal. factor for sensor nn
SMNnn
X??
Minimum delta-r for sensor nn
SMXnn
X??
Maximum delta-r for sensor nn
SCTnn
X.XXXXXXXXX
Temperature compensation adjustment
SCFnn
X.XXXXXXXXX
Correction factor to flow output
SAREA
X.XXXXXXXXX
Area of duct
SAUNI
TTTTT????
Units of measure for area
SFUNI
TTTT??
Units of measure for flow
SFFAC
X.XXXXXXXXX
Conversion factor SF/S to ????
SPMPn
TTTT
Mode of output n. FLOW or TEMP
SPOPn
TTTT??
Analog output type for output n
SPSPn
X.XXXXXXXXX
Span value for output n in ??? units
SP0Pn
X.XXXXXXXXX
Zero value for output n in ??? units
STUNI
T
Units of measure for temperature
STMPF
X.XXXXXXXXX
Conversion multiplier for temperature
STADF
X.XXXXXXXXX
Conversion offset for temperature
SRRnn
X.XXXXXXXXX
Reference resistance for sensor nn
SRDnn
X.XXXXXXXXX
Delta-R resistance for sensor nn
SSCEM
XXXX
Hex code for heads which won't balance
SBCEM
X.XXXXXXXXX
Percent (FS) deviation from balance cal test
SLCEM
X.XXXXXXXXX
Percent (FS) deviation from Low Flow cal. test
SMCEM
X.XXXXXXXXX
Percent (FS) deviation from Mid Flow cal test
SHCEM
X.XXXXXXXXX
Percent (FS) deviation from High Flow cal test
?????
?
RESPONSE TO UNKNOWN COMMAND
Doc. No. 003185 Rev. B
3 - 17
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
Model MT91 Multipoint Flowmeter
CHAPTER 3 - OPERATION
3 - 18
Doc. No. 003185 Rev. B
CHAPTER 4 - MAINTENANCE
FLUID COMPONENTS INTL
4. Maintenance
Warning: To avoid hazards to personnel, ensure that all environmental isolation seals are properly
maintained.
Caution:
The flow transmitter contains electrostatic discharge (ESD) sensitive devices. Use standard ESD
precautions when handling the flow transmitter. See Chapter 2, Installation for ESD details.
The flowmeter requires very little maintenance. There are no moving parts or mechanical parts subject to wear in the
flowmeter. The sensor assembly which is exposed to the process media is all stainless steel construction with nickel
braze and is only susceptible to chemical attack based on the corrosion relationship of the RTD thermowell material
with the process media.
Maintenance
Without detailed knowledge of the environmental parameters of the application surroundings and process media, FCI
cannot make specific recommendations for periodic inspection, cleaning, or testing procedures. However, some
suggested general guidelines for maintenance steps are offered below. Use your operating experience to establish the
frequency of each type of maintenance.
Calibration
Periodically verify the calibration of the output and recalibrate if necessary. See Chapter 5. FCI recommends every
18 months at a minimum.
Electrical Connections
Periodically inspect cable connections on terminal strips and terminal blocks. Verify that terminal connections are
tight and physically sound with no sign of corrosion.
Remote Enclosure
Verify that the moisture barriers and seals protecting the electronics in the probe assembly enclosure and the
electrical assembly enclosure are adequate and that no moisture is entering those enclosures.
Electrical Wiring
FCI recommends occasional inspection of the system’s interconnecting cable, power wiring and probe assembly
wiring on a “common sense” basis related to your application environment. Periodically the conductors should be
inspected for corrosion and the cable insulation checked for signs of deterioration.
Flow Element Connections
Verify that all seals are performing properly and that there is no leakage of the process media. Check for
deterioration of the gaskets and environmental seals used.
Flow Element Assembly
Periodically remove the flow element for inspection based on historical evidence of debris, foreign matter, or scale
build-up and appropriate plant shutdown schedules and procedures. Check for corrosion, stress cracking, and/or
build-up of oxides, salts, or foreign substances. The thermowells must be free of excessive contaminants and be
physically intact. Any debris or residue build-up could cause inaccurate switching. Clean the probe, as necessary,
with a soft brush and available solvents (compatible with Stainless Steel).
Doc. No. 003185 Rev. B
4-1
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
Model MT91 Multipoint Flowmeter
CHAPTER 4 - MAINTENANCE
4-2
Doc. No. 003185 Rev. B
CHAPTER 5 - TROUBLESHOOTING
FLUID COMPONENTS INTL
5. Troubleshooting
Warning: Only qualified personnel should attempt to test this device. The operator assumes all
responsibilities for safe practices while troubleshooting.
Caution:
The flow transmitter contains electrostatic discharge (ESD) sensitive devices. Use standard ESD
precautions when handling the flow transmitter. See Chapter 2, Installation for ESD details.
Quick Check
Use Table 5-1 as a quick check of problems and solutions. More in-depth discussions follow this table.
Table 5-1. Quick Check Troubleshooting
Problem
No Display
No Display or Dim Display
Display is locked up
Incorrect Readings
Solution
Check fuses. Verify correct power is applied.
Verify the ribbon cable between the backplane board J18 and the display J1 is
solidly connected and the red stripe is at pin 1. See Figures 2-3 and 2-4.
Adjust potentiometer R1 (located on display board) clockwise (10 turns
maximum) until display appears. See Figures 2-3.
Cycle the input power or press any key for more than 10 seconds.
Verify that all ribbon cables are firmly seated. See Figure 2-3 and 2-4.
Non-maintenance Observations
At this point, simply observe the system setup to verify operation. No disassembly or testing is required at this time.
Check Serial Numbers
Verify that the serial number of the flow elements and the flow transmitter are the same. The flow elements and the
flow transmitter are a matched set and cannot be operated independently of each other.
Check Input Power
Verify that the correct power source is turned on and connected.
Check the Unit Installation
Review the information on instrument installation in Chapter 2 to verify correct mechanical and electrical
installation. Verify that all ribbon cables are seated firmly.
Relay Output Board J1
Analog Output Board J1
Display Board J1
Þ
Þ
Þ
Backplane Board J21 and/or J22
Backplane Board J19
Backplane Board J18
Check for Moisture
Check for moisture on the flow transmitter. Moisture on the flow transmitter may cause intermittent operation.
Doc. No. 003185 Rev. B
5-1
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 5 - TROUBLESHOOTING
Check Application Design Requirements
Application design problems usually occur with first time application units, although the design should also be
checked on units that have been in operation for some time. If the application design does not match field
conditions, errors occur.
1.
Review the application design with plant operation personnel and plant engineers.
2.
Ensure that plant equipment such as pressure and temperature instruments conform to the actual conditions.
3.
Verify operating temperature, operating pressure, line size, and gas medium.
Verify Standard Versus Actual Process Conditions
The flowmeter measures the mass flow rate. The mass flow rate is the mass of the gas flowing through a pipe per
time. Other flowmeters, such as an orifice plate or a pitot tube, measure the volumetric flow rate. The volumetric
flow rate is the volume of gass per time. If the readings displayed by the MT91 does not agree with another
instrument, some calculations may be necessary before comparing them. To calculate the mass flow rate, the
volumetric flow rate, and the pressure and temperture at the point of measurement must be known. Use the following
equation to calculate the mass flow rate (Standard Volumetric Flowrate) for the other instrument.
Equation:
QS = Q A ×
PA
T
× S
TA
PS
Where:
QA = Volumetric Flow QS = Standard Volumetric Flow
PA = Actual Pressure TA = Actual Temperature
PS = Standard Pressure TS = Standard Temperature
and Pressure and Temperature are in absolute units.
Example:
QA = 1212.7 ACFM
PA = 19.7 PSIA
PS = 14.7 PSIA
( 1212.71ACFM) (
QS = 1485 SCFM
TA = 120°F (580°R)
TS = 70°F (530°R)
19.7 PSIA
580° R
)(
530° R .
14.7 PSIA
) = 1485 SCFM
Troubleshooting Process
Verify Units
Observe the normal display screen to verify that the unit of measure for channel 1 and 2 are the expected units.
If units are correct, proceed to the next section. If units are not correct, refer to Chapter 3 for instructions on
selecting measurement units.
Verify Channel Assignment
If there is no reading or faulty reading, make sure that the sensing points are assigned to the correct channel.
Refer to Chapter 3 for instructions on assigning sensing points if they need to be assigned.
1.
Go to menu level 2.2.1 and select the desired channel (SetupÞ OutputsÞ Assign Heads) .
2.
Select 5=View Assigned. An ‘x’ will appear under the sensing point number if it is assigned.
If the correct sensing points are assigned, continue with the next section.
Model MT91 Multipoint Flowmeter
5-2
Doc. No. 003185 Rev. B
CHAPTER 5 - TROUBLESHOOTING
FLUID COMPONENTS INTL
Verify Limits
If there is a no flow indication when flow exists, the DelR min may have been set to high.
1.
Go to menu level 4.2.5, select the head number in question and record the DelR value.
2.
Go to menu level 5.2.3.1 (VerifyÞ CalibrationÞ FlowÞ Limits).
3.
Press any key to scroll down to the desired display. For example, if sensing point 16 is being tested, press any
key until the display shows dRMin 16.
If the dRMin is set below the recorded value in Step 1, continue with the next section.
If the dRMin is set above the recorded value in Step 1, contact Customer Service.
Check for Suspect Sensing Points and Heaters
An annunciator on the normal display will indicate “Check Head” if the flow transmitter detects a problem with
one or more sensing points. Use the diagnostics menu to identify which sensing points are suspect.
1.
First go to menu level 3.1.1 (DiagnosticsÞ System StatusÞ Sensors).
2.
Suspect sensing points are indicated on the display by a ‘x’. Note any suspect sensing points.
3.
Go to menu level 3.1.2 (DiagnosticsÞ System StatusÞ Heaters). This display indicates suspect heaters.
4.
Go to menu level 4.2.5 (CalibrationÞ Cal InputsÞ Unipolar rR & dR).
5.
Enter the number of the suspect sensing point. Check for valid RefR and DelR levels.
The RefR signal depends on the temperature of the media and ranges from 1080 (108 high temperature units)
at room temperature beyond 1650 (165 for high temperature units) at approximately 350°F (177°C). The
DelR depends on the flow rate and can range from 10 ( 3 for high temperature units ) to more than 100 ( 20
for high temperature units ).
If the DelR is very low or zero and the RefR appears normal, the heater circuit may be broken. Measure the
resistance of the wiring from HAX to HAS. If the resistance is approximately 20 ohms the input board may have
a failed heater component, contact Customer Service.
Verify the Calibration Parameters
The flowmeter uses a set of predetermined calibration parameters to process flow and temperature signals. Most of
these parameters should not change. A data package located at the rear of this manual contains the “MT91 Delta
R Data Sheet” and the “MT91 Delta R Parameters”. These contain the calibration parameters stored in the flow
transmitter at the factory. (See Appendix D for an explanation of these parameters.) Verify that these parameters
have not changed using the steps described next.
Note: The units being verified are always displayed in the MT91’s internal units. Flow is always displayed
in SF/S, temperature is displayed in Fahrenheit, and area is displayed in ft2.
1.
Identify the appropriate Delta R Parameter sheets by serial number. At the top of each column is the menu
level that displays the parameters. For example, 5.1.1 are the numbers to press to get from the main menu to
the submenu.
2.
Go to the menu level for the parameters of interest (e.g. 5.1.1 VerifyÞ SetupÞ Flow). Note any differences
in values.
If parameters in the verify cal categories have changed, this may indicate a problem. Please contact Customer
Service. If the parameters have not changed, continue with the next section.
Doc. No. 003185 Rev. B
5-3
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 5 - TROUBLESHOOTING
Check the Resistance of the Sensing Points
To simplify the discussion below, the nomenclature J1 and TB1-HD1 will be used to represent all individual
sensing points.
Use Table 5-2 to determine if the flow element is wired incorrectly or has failed. Turn off the input power to the
flow transmitter. Disconnect the suspect sensing point’s connector from the remote enclosure. Measure
resistances at the points shown in Table 5-2 by touching the DMM test leads to the connector terminal screws. See
Figure 5-1. (Plug the connector back in when finished.)
Note: All resistances referred to below are for standard instruments using 1000 ohms RTDs. For high
temperature units, replace 1000 ohms with 100 ohms.
All resistances in Table 5-2 are based on a temperature of 32°F (0°C). Expect reading to be higher at room
temperature, approximately 1080 ohms for a standard instrument or 110 ohms for a high temperature instrument.
For a closer estimation, use the following equation:
Ra = Ri x [1 + (0.00385 x T)]
Ri = initial resistance ( 100 ohms for high temperature flowmeters, 1000 ohms for standard temperature
flowmeters)
Ra = actual resistance
T = degrees Celsius
The numbers in Figure 5-1 have been added to the wire designations for discussion purposes and are not found on
the connector plugs or wires.
Pin Number
Approximate Resistance
Figure 5-1. J1 Connector Plug on the
Backplane Board
2 to 3
1000 ohms
2 to 4
1000 ohms
2 to 5
1000 ohms
2 to 6
1000 ohms
7 to 8
220 ohms
3 to 5
0 ohms
4 to 6
0 ohms
Table 5-2. Resistances at J1 Connector Plug
on the Backplane Board
If the measured resistances correspond to Table 5-2, then the sensing point is sound. The problem lies else where.
Skip the rest of this section and proceed with the next section, Analog Output Test.
If the measured values do not correspond to Table 5-2, then a problem exists in the flow element or the cable.
Wires within the cable could be shorted or open. To isolate a problem with the cable, check the sensing point
resistances of the corresponding terminal connector located within the flow element enclosure. Measure
resistances at the points shown in Table 5-3 by touching the DMM test leads to the terminal screws. See Figure 51.
If the values do not correspond with Table 5-3, remove the cable wires from the terminal connector and measure
resistances again. The measured resistances should correspond approximately to the values in Table 5-3.
Model MT91 Multipoint Flowmeter
5-4
Doc. No. 003185 Rev. B
CHAPTER 5 - TROUBLESHOOTING
FLUID COMPONENTS INTL
Figure 5-2. TB1-HD1 Terminal Connector
Terminal No.
Approximate Resistance
2 to 3
1000 ohms
2 to 4
1000 ohms
2 to 5
1000 ohms
2 to 6
1000 ohms
7 to 8
220 ohms
4 to 6
0 ohms
3 to 5
0 ohms
Table 5-3. Resistance at TB1-HD1 Terminal Connector
If the measured resistances correspond to Table 53, but not to Table 5-2, the cable is defective or the flow element is misswired. Replace cable and recheck
resistances. If resistances are still off, contact Customer Service.
If the measured values do not correspond to Table 5-3, then the sensing element is defective. Contact Customer
Service.
Check the Analog Outputs
Before using this utility, the analog outputs must be correctly configured. Refer to Chapter 3 for setting up the
analog outputs. For signal connections, refer to Figure 2-2 and Table 2-2 in Chapter 2.
1.
Go to menu level 3.2.1 (DiagnosticsÞ Output TestsÞ Analog Out Test).
2.
Select the desired channel.
3.
Enter the percent of full scale.
Note: For outputs configured 0 to 5 Vdc and 0 to 10 Vdc, the output should be the selected percentage of the
full scale value. For outputs configured as 4 to 20 mA, the output should be 4 mA plus the selected
percentage of 16 mA.
4.
If the correct value is not obtained, refer to Chapter 3 to re-calibrate the output channel.
5.
If the calibration is unsuccessful, remove and replace assembly 015231.
Check the Relays
Refer to Chapter 3 for setting up the relay outputs. For signal connections, refer to Figure 2-2 and Table 2-2 in
Chapter 2. This utility will operate the relays regardless of their configuration.
1.
Go to menu level 3.2.2 (DiagnosticsÞ Output TestsÞ Relay Test).
2.
Select the desired relay.
3.
The present state of the relay is displayed on the second line. Press the appropriate key to change the state of
the relay.
4.
To observe the output, connect an ohmmeter between the relay contacts of interest (refer to Figure 2-2 and
Table 2-2).
5.
If the relay fails to operate, remove and replace assembly 015235.
Run the Calibration Test
See Chapter 3 for a full description of the function of the calibration test and for instructions on scheduling
automatic calibration tests. Test for shifts in calibration parameters or unbalance sensing points.
Doc. No. 003185 Rev. B
5-5
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
CHAPTER 5 - TROUBLESHOOTING
1.
Go to menu level 3.3.1 (DiagnosticsÞ Calibration TestsÞ Start Test).
2.
Both channels of the analog output board (see Figure 2-2) are driven to preset vales during the test.
3.
The sequence of screens A through E shown in Figure 3-8 will display throughout the test.
4.
5.
a.
Screen A displays for 2 minutes while the outputs are held at the zero level.
b.
Screen B displays for 2 minutes while the outputs are held at mid-scale level.
c.
Screen C displays for 2 minutes while the outputs are held at full scale level.
d.
Screen D displays while the system balances and tests each sensing point input channel. From this point
until the conclusion of the test, the analog output will be fixed at zero percent scale.
e.
Screen E signals the end of the calibration test. The heaters are turned back on and the system waits three
minutes for them to warm up.
To view the test results, go to menu level 3.3.2 (Diagnostics Þ Calibration TestsÞ Display Results). If Screen
F appears, the sensing points that the system could not balance will be displayed.
a.
Verify wiring between the flow element and the flow transmitter. If the resistance is very high, the REF
EXC and ACT EXC wires may be switched. Switch the REF EXC wire with the ACT EXC wire and vice
versa.
b.
At high temperatures, the balance point may be too far from zero to balance out. Verify if this condition
exists by breaking the heater circuit of the suspect sensing point by removing one of the heater wires
(HTR A SEN or HTR A EXC) from the connector. Then view the sensing point values at menu level
4.2.6. Select the suspect sensing point. Make note of the DelR[x] and RefR[x] values. If DelR[x] does
not drop to a value between -1.0 and 1.0, the balance deviation is too large. Contact Customer Service.
Screen G will appear next or immediately after selecting menu level 3.3.2.
a.
If the values are not above 3% deviation, the instrument has not drifted more than the daily allowable drift
as specified in 40CFR675.
b.
If the values are above 3% deviation, re-calibration of the input board may be necessary, contact Customer
Service.
Spares
When system down time is critical, FCI recommends one of each of the following should be kept as a spare:
controller board (P/N 015796), input board (P/N 015149), relay board (P/N 015235), analog output board (P/N
015231), display board (P/N 014427) and battery (P/N 011616-01. Removal and replacement of boards may
resolve problem faster than troubleshooting. Contact FCI for specific recommendations.
Defective Parts
Before returning any equipment to FCI, please obtain an RA number for authorization, tracking, and repair/
replacement instructions. If a return is required, remove defective unit, replace with spare, calibrate, then return
defective unit to FCI freight prepaid for disposition.
Customer Service
1.
In the event of problems or inquiries regarding the flowmeter, please contact the Regional or Country
Authorized FCI Field Agent. There is an extensive list of these representatives at the front of this manual.
2.
Before contacting the FCI representative, please be sure that all the applicable information is near so that a
more effective, efficient and timely response may be provided.
3.
Refer to Appendix C for specific Customer Service policy provisions.
Model MT91 Multipoint Flowmeter
5-6
Doc. No. 003185 Rev. B
APPENDIX A - DRAWINGS
FLUID COMPONENTS INTL
Appendix A. Drawings
All dimensions are shown in inches. Brackets [ ] indicate dimensions in millimeters.
Figure A-1. Threaded Flow Element Installation Drawing
Figure A-2. Flanged Flow Element Installation Drawing
A-3. Explosion Proof Enclosure 18 X 18 X 8
Doc. No. 003185 Rev. B
A-1
Figure A-2. Local Enclosures
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX A - DRAWINGS
Figure A-4. NEMA Type 4 Local Enclosure
Figure A-5. NEMA Type 7, Groups B,C And D Hazardous Locations Local
Figure A-6. NEMA 4 Remote Enclosure
Model MT91 Multipoint Flowmeter
A-2
Doc. No. 003185 Rev. B
APPENDIX B - GLOSSARY
FLUID COMPONENTS INTL
Appendix B. Glossary of Terms
Area
Cross-sectional area for a process line or duct.
Area o f a circular duct = p r 2 o r p
(
I .D.
2
)
2
Area of a Rectangular duct = h × w
Bipolar
Allows users to view both negative and positive values for DR.
DVM
Digital Voltmeter
EIA
Electronics Interface Association
C1 - C5
C1 through C5 are flow coefficients for the balanced polynomial equation. The
flow coefficients characterize the shape of the curve generated by the equation.
Flow = C1( ∆R −2 ) + C 2 ( ∆R ) + C 3 + C 4 ( ∆R ) + C 5( ∆R 2 )
C1- C5 are unique to each sensing point. On the Delta R Paramter sheet,
they are shown as H01C1 through H01C5 for sensing point 1. (H = head,
01 = sensing point 1).
Comm Mode
Serial communication mode. There are three options: EIA-232, EIA-422, EIA485.
CorrF[1] - [4]
CorrF[1] through CorrF[4] are correction factors that apply to the Corrected Flow
Rate equation. See Chapter 3 - Operation for more information.
Corrected Flow Rate = C1 + ( C2 × m0 ) + ( C3 × m02 ) + ( C4 × m03 )
dR Min
DR value low end cutoff. Should be set to approximately 5 ohms less than the
lowest calibrated DR.
dr Max
DR value high end cutoff. Should be set to approximately 5 ohms greater than the
lowest calibrated DR.
Flow Element
The Flow Element includes the local enclosure and the sensing points.
Flow Factor
The Flow Factor is the multiplier that converts the internal flow rate (SFPS) to the
user selected flow untis.
Flow Min
Minimum calibrated flow rate in standard feet per second (SFPS)
Flow Max
Maximum calibrated flow rate in standard feet per second (SFPS)
Flow Transmitter
The Flow Transmitter consists of the remote enclosure and all of the electronics
contained within.
Full Scale
Full scale is from the zero value to the max flow value. For zero based
applications this is from 0.00 to the maximum flow value. For non-zero based
applications full scale is from minimum flow value to the maximum flow value.
Offset 1 - 16
Offset value for each sensing point. Offset Equation = DR + Offset Value
Doc. No. 003185 Rev. B
B-1
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX B - GLOSSARY
Port [1]
Channel 1 for output signal. Port [2] corresponds to Channel 2.
RTD
A Resistance Temperature Detector operates on the principle of change in
resistance as a function of temperature.
Span
Span is the full scale value minus the minimum flow value.
Standard Density
Standard Density is the density of media (customer’s original request) at standard
conditions usually at 14.7 PSIA and 70°F: used by firmware for conversion when
a mass flow rate unit is chosen such as LB/HR etc.
Sensing Point
The Sensing Points contain the four thermowells that house the resistance
temperature detectors and the heater.
DR
The difference between two resistance values.
DT
The difference between two temperature values.
Unipolar
Allows users to view only positive values for DR.
Zero
0.00 for zero based applications. For non-zero based applications the zero is at
minimum flow.
Model MT91 Multipoint Flowmeter
B-2
Doc. No. 003185 Rev. B
APPENDIX A - DRAWINGS
FLUID COMPONENTS INTL
Figure A-7. Rack Mount Remote Enclosur
Doc. No. 003185 Rev. B
A-3
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX A - DRAWINGS
Figure A-8. Recommended Customer Process Connection
Figure A-9. Recommended End Support Configuration
Model MT91 Multipoint Flowmeter
A-4
Doc. No. 003185 Rev. B
APPENDIX A - DRAWINGS
FLUID COMPONENTS INTL
Figure A-10. Alternate End Support Configuration
Doc. No. 003185 Rev. B
A-5
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX A - DRAWINGS
Figure A-11. LT or GF Medium Pressure Sensing Element Configured For MT91
Model MT91 Multipoint Flowmeter
A-6
Doc. No. 003185 Rev. B
APPENDIX D - MT91 DELTA R PARAMETERS
FLUID COMPONENTS INTL
Appedix D. MT91 Delta R Parameters
For each instrument there are “MT91 Delta R Parameters” sheets and a 4-20mA look up table inserted in the rear
page protector. Appendix D explains the codes found on the Delta R Parameters sheets. A sample of both the Delta
R Parameter sheet and the 4-20mA look up table follow the explanations.
Above each column is a menu level code. When verifying parameters, access the menu level and then scroll down
through the menu until the value in question appears on the screen. For example, to view the parameter “dRmin 1”,
press HOME, 5, 2, 3, and 1. (VerifyÞ Verify CalÞ FlowÞ Limits). Scroll down by pressing ENTR until “dRmin 1”
appears on the screen.
The instrument uses internal units of Standard Feet per Second and degrees Fahrenheit. Therefore, all values on this
sheet are in Standard Feet per Second. Refer to "Verify Standard vs. Actual Conditions" in Chapter 5 to convert
actual readings to standard readings.
In menu levels 5.1.1 and 5.1.3 active sensing points are designated by hexadecimal notation. Use the following
diagram and table to decipher which sensing points are active. For example, the number 0003 in hexadecimal
notation means sensing points 1 and 2 are active.
This hexidecimal
notation is found on the
Delta R Parameter Sheet
and on the Display.
This code indicates that
sensing points
1,5,6,7,8,10,11, and 16
are active.
0=Off
1=On
Group
Group
Group
Group
Group
Code
Sensing
Point 16
1000
0001
0110
represents
represents
represents
represents
sensing
sensing
sensing
sensing
1111
Group 4
Group 1
Group 3
1
2
3
4
Sensing
Point 1
86F1
points
points
points
points
Group 2
1,2,3, and 4.
5,6,7,and 8.
9,10,11, and 12.
13,14,15, and 16.
Hex
#
Group
Code
Hex
#
'0000
0
1000
8
'0001
1
1001
9
'0010
2
1010
A
'0011
3
1011
B
'0100
4
1100
C
'0101
5
1101
D
'0110
6
1110
E
'0111
7
1111
F
C00298-1
Explanation of Parameters and Code
5.1.3 Verify Setup Outputs
[1] = Channel 1
5.1.1 Verify Setup Flow
Flow Units Customer Specified Unit
Flow Heads Hexadecimal Notation
Area Unit Customer Specified Unit
Area
Area of Customer Pipe or Duct
TC Ena
Temperature Compensation Enabled
Corr Ena
Correction Enabled
Offset Ena Offset Enabled
Filter
Filter Strength (See Chapter 3)
Density
Standard Density of Customer Media in LBM per
cubic feet.
Flow Fac
Flow Factor
5.1.2 Verify Setup Temperature
Temp Type Units used during calibration.
Temp Heads Hexadecimal Notation
Doc. No. 003185 Rev. B
PortUnit[1]
PortUnit[2]
Out Head[1]
Out Head[2]
Zero[1]
Zero[2]
Span[1]
[2] = Channel 2
0 = Flow 1 = Temperature
0 = Flow 1 = Temperature
Hexadecimal Notation
Hexadecimal Notation
Zero output setting at either zero (0) or minimum
flow. (e.g. 4mA represents either 0 or minimum
flow)
High point of output signal.(e.g. 20mA represents
high point)
Span[2]
5.1.4 Verify Setup Communication
Comm Mode 0 = EIA-232C 1 = EIA-422 2 = EIA-485
Comm Rate 0 = 4800
1 = 9600
2 = 19.2K
Comm Prot 0 = Protocol 1 1 = Protocol 2 2 = Protocol 3
485 Addr
D-1
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
5.2.1 Verify Cal Inputs
URRG1
Unipolar Reference R Gain
URRG2
URRO1
Unipolar Reference R Offset
URRO2
UDRG1
Unipolar Delta R Gain
UDRG2
UDRO1
Unipolar Delta R Offset
UDRO2
BRRG1
Bipolar Reference R Gain
BRRG2
BRRO1
Bipolar Reference R Offset
BRRO2
BDRG1
Bipolar Delta R Gain
BDRG2
BDRO1
Bipolar Delta R Offset
BDRO2
RxAdj1
Reference Adjust
(sensing points 1 through 8)
RxAdj2
Reference Adjust
(sensing points 9 through 16)
HtAdj1
Heater Adjust
HtAdj2
HtAdj3
HtAdj4
HtAdj5
HtAdj6
HtAdj7
HtAdj8
HtAdj9
HtAdj10
HtAdj11
HtAdj12
HtAdj13
HtAdj14
HtAdj15
HtAdj16
5.2.2 Verify Cal Outputs
Zero[1]
A to D Values
Zero[2]
A to D Values
Span[1]
A to D Values
Span[2]
A to D Values
Slope[1]
A to D Values
Slope[2]
A to D Values
Off[1]
A to D Values
Off[2]
A to D Values
CorrF[1]
Correction Factor 1
CorrF[2]
Correction Factor 2
CorrF[3]
Correction Factor 3
CorrF[4]
Correction Factor 4
Model MT91 Multipoint Flowmeter
APPENDIX D - MT91 DELTA R PARAMETERS
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Channel 1
Channel 2
Output Board 1
Output Board 2
Sensing Point 1
Sensing Point 2
Sensing Point 3
Sensing Point 4
Sensing Point 5
Sensing Point 6
Sensing Point 7
Sensing Point 8
Sensing Point 9
Sensing Point 10
Sensing Point 11
Sensing Point 12
Sensing Point 13
Sensing Point 14
Sensing Point 15
Sensing Point 16
5.2.3.1 Verify Cal Flow Limits
FlowMin
Customer specified and factory calibrated value
for minimum flow.
FlowMax
Customer specified and factory calibrated value
for maximum flow.
TempMin Customer specified and factory calibrated value
for minimum temperature.
TempMax Customer specified and factory calibrated value
RRmin
Reference R minimum Calibration Value
RRmax
Reference R maximum Calibration Value
dRMin 1
Delta R minimum Calibration Value
Sensing Point 1
dRMin 2
Sensing Point 2
dRMin 3
Sensing Point 3
dRMin 4
Sensing Point 4
dRMin 5
Sensing Point 5
dRMin 6
Sensing Point 6
dRMin 7
Sensing Point 7
dRMin 8
Sensing Point 8
dRMin 9
Sensing Point 9
dRMin 10
Sensing Point 10
dRMin 11
Sensing Point 11
dRMin 12
Sensing Point 12
dRMin 13
Sensing Point 13
dRMin 14
Sensing Point 14
dRMin 15
Sensing Point 15
dRMin 16
Sensing Point 16
drMax 1
Delta R maximum Calibration Value
Sensing Point 1
drMax 2
Sensing Point 2
drMax 3
Sensing Point 3
drMax 4
Sensing Point 4
drMax 5
Sensing Point 5
drMax 6
Sensing Point 6
drMax 7
Sensing Point 7
drMax 8
Sensing Point 8
drMax 9
Sensing Point 9
drMax 10
Sensing Point 10
drMax 11
Sensing Point 11
drMax 12
Sensing Point 12
drMax 13
Sensing Point 13
drMax 14
Sensing Point 14
drMax 15
Sensing Point 15
drMax 16
Sensing Point 16
D-2
Doc. No. 003185 Rev. B
APPENDIX D - MT91 DELTA R PARAMETERS
FLUID COMPONENTS INTL
5.2.3.2 Verify Cal Flow Coefficients
H01C1
H01C2
H01C3
H01C4
H01C5
H02C1
H02C2
H02C3
H02C4
H02C5
H03C1
H03C2
H03C3
H03C4
H03C5
H04C1
H04C2
H04C3
H04C4
H04C5
H05C1
H05C2
H05C3
H05C4
H05C5
H06C1
H06C2
H06C3
H06C4
H06C5
H07C1
H07C2
H07C3
H07C4
H07C5
H08C1
H08C2
H08C3
H08C4
H08C5
Sensing Point 1
Sensing Point 2
Sensing Point 3
Sensing Point 4
Sensing Point 5
Sensing Point 6
Sensing Point 7
Sensing Point 8
Doc. No. 003185 Rev. B
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
H09C1
H09C2
H09C3
H09C4
H09C5
H10C1
H10C2
H10C3
H10C4
H10C5
H11C1
H11C2
H11C3
H11C4
H11C5
H12C1
H12C2
H12C3
H12C4
H12C5
H13C1
H13C2
H13C3
H13C4
H13C5
H14C1
H14C2
H14C3
H14C4
H14C5
H15C1
H15C2
H15C3
H15C4
H15C5
H16C1
H16C2
H16C3
H16C4
H16C5
D-3
Sensing Point 9
Sensing Point 10
Sensing Point 11
Sensing Point 12
Sensing Point 13
Sensing Point 14
Sensing Point 15
Sensing Point 16
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Coefficient 1
Coefficient 2
Coefficient 3
Coefficient 4
Coefficient 5
Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX D - MT91 DELTA R PARAMETERS
5.2.3.3 Verify Cal Flow Offsets
Offset 1
Offset Value added to the Raw Signal.
Sensing Point 1
Offset 2
Sensing Point 2
Offset 3
Sensing Point 3
Offset 4
Sensing Point 4
Offset 5
Sensing Point 5
Offset 6
Sensing Point 6
Offset 7
Sensing Point 7
Offset 8
Sensing Point 8
Offset 9
Sensing Point 9
Offset 10
Sensing Point 10
Offset 11
Sensing Point 11
Offset 12
Sensing Point 12
Offset 13
Sensing Point 13
Offset 14
Sensing Point 14
Offset 15
Sensing Point 15
Offset 16
Sensing Point 16
5.2.3.4 Verify Cal Flow Temp Comp
Cal Ref
Temperature Compensation Calibration
Reference Value
TCAdj01
Temperature Compensation Coefficient
Sensing Point 1
TCAdj02
Sensing Point 2
TCAdj03
Sensing Point 3
TCAdj04
Sensing Point 4
TCAdj05
Sensing Point 5
TCAdj06
Sensing Point 6
TCAdj07
Sensing Point 7
TCAdj08
Sensing Point 8
TCAdj09
Sensing Point 9
TCAdj10
Sensing Point 10
TCAdj11
Sensing Point 11
TCAdj12
Sensing Point 12
TCAdj13
Sensing Point 13
TCAdj14
Sensing Point 14
TCAdj15
Sensing Point 15
TCAdj16
Sensing Point 16
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
APPENDIX D - MT91 DELTA R PARAMETERS
Doc. No. 003185 Rev. B
FLUID COMPONENTS INTL
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Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
Model MT91 Multipoint Flowmeter
APPENDIX D - MT91 DELTA R PARAMETERS
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Doc. No. 003185 Rev. B
APPENDIX D - MT91 DELTA R PARAMETERS
Doc. No. 003185 Rev. B
FLUID COMPONENTS INTL
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Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
Model MT91 Multipoint Flowmeter
APPENDIX D - MT91 DELTA R PARAMETERS
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Doc. No. 003185 Rev. B
APPENDIX C - CUSTOMER SERVICE
FLUID COMPONENTS INTL
Appendix C. Customer Service
Point of Contact
Your point of contact for service, or return of equipment to FCI is your authorized FCI service representative (see list
in the front matter of this manual).
Reference Documents
Return Authorization Request/Certificate of Non-Contamination (Document 1)
Warranties (Document 2)
Documents 1 and 2 are included in this appendix.
Hardware Return Procedure
1.
Complete a Return Authorization (RA) Request/Certificate of Non-Contamination form (Document 1). Mail
or fax it to FCI customer service department. After FCI issues an RA number, complete the following steps.
2.
Thoroughly clean the hardware.
3.
Package each instrument with protective packing material similar to the original FCI shipment cartons indicated
below. All damage occurring in transit is the customer’s responsibility.
4.
a.
Instruments weighing less than 25 pounds each are to be covered with protective wrap, i.e. bubble wrap
or surrounded with "popcorn". Instruments weighing greater than 60 pounds or extending more than
four feet should be secured in wooden crates by bolting the sensing element assembly in place.
b.
Protect the sensing element with a cardboard tube or other sturdy wrapping.
c.
Do not pack more than four small instruments in each carton.
d.
Packages weighing in excess of 70 pounds or with a combined length and girth of more than 138 inches
cannot be shipped by United Parcel Service. Larger packages or crates should be shipped by carriers
who specialize in the transport of industrialized instrumentation.
e.
The RA number should be noted on the packing list and marked clearly on the outside of the box.
Prepay freight to the FCI receiving door.
Shipping/Handling Charges
All Shipping (Warranty and Nonwarranty Repairs or Returns)
The customer prepays all shipping, freight, duty/entry and handling charges from the customer site to the FCI door.
If the customer does not prepay, FCI will invoice the customer for the charges that appear on the freight bill.
Address the return equipment to :
FLUID COMPONENTS INTL
1755 LA COSTA MEADOWS DRIVE
SAN MARCOS, CA. 92069
ATTN: REPAIR DEPT.
RA NUMBER:
Doc. No. 003185 Rev. B
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Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX C - CUSTOMER SERVICE
Warranty Repairs or Returns
FCI prepays ground transportation charges for return of freight to the customer’s door. FCI reserves the right to
return equipment by the carrier of our choice.
International freight, handling charges, duty/entry fees for return of equipment are paid by the customer.
Nonwarranty Repairs or Returns
FCI returns repaired equipment to the customer either collect or prepaid and adds freight charges to the customer
invoice.
Return to Stock Equipment
The customer is responsible for all shipping and freight charges for equipment that is returned to FCI stock from the
customer site. These items will not be credited to customer’s account until either all freight charges are cleared or
until the customer agrees to have any freight costs incurred by FCI deducted, along with applicable return to stock
charges, from the credit invoice. (Exceptions are made for duplicate shipments made by FCI.)
If any repair or return equipment is received at FCI, freight collect, without prior factory consent, FCI bills the
sender for these charges.
Field Service Procedures
Field Service Requests
Contact your FCI field representative to request field service.
A field service technician is dispatched to the site from either the FCI factory or one of the FCI representative
offices. After the work is complete, the technician completes a preliminary field service report at the customer site
and leaves a copy with the customer.
Following the service call, the technician completes a formal, detailed service report. The formal report is mailed to
the customer within five days of the technician’s return to the factory or office.
Rates
All field service calls are billed at the prevailing rates as listed in the FCI Price Book unless specifically excepted by
the FCI Customer Service Manager. FCI reserves the right to bill for travel times at our discretion.
Customers are charged for shipping costs related to the transfer of equipment to and from the job site. They are also
invoiced for field service work and travel expenses by FCI’s Accounting Department.
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
APPENDIX C - CUSTOMER SERVICE
FLUID COMPONENTS INTL
Document 1.
FCI RETURN AUTHORIZATION REQUEST
Customer Information
Name of Company Returning Hardware
Contact Name:
Phone #
Fax #
Customer Bill to Address:
Ship to:
Purchase Agent Contact:
Phone #
Fax #
Product Information
Model Number(s)
Sending:
Electronics only
Serial Number(s)
Sensor only
Complete unit
Number of units
Failure Symptoms
Troubleshooting done in the field by
FCI representative
or by Customer
:
Action to be taken by FCI
(Note: Re-calibration/Re-certification requires the completion of a new Application Data Sheet)
Process Flow Media:
Who is your FCI factory technical contact:
Note: FCI will charge a $100 minimum handling fee on all non-warranty evaluations.
Have you contacted your local FCI representative for assistance?
yes
no
Decontamination Information
Exposure to hazardous materials is regulated by Federal, state (California), County and City laws and regulations. These
laws provide FCI's employees with the right to know the hazardous materials with which they come in contact while handling
our products. Consequently, our employees must have access to data regarding the hazardous materials which the equipment
has been exposed to in your process(es). Accordingly, prior to returning your instrument for repair, please sign the certification below and
thoroughly comply with the instructions, if applicable.
I certify that the item(s) has (have) been thoroughly and completely cleaned and if the item(s) has (have) been exposed to or
contacted by a hazardous material, hazardous substance or toxic materials or substances that the undersigned can assure the returned item(s) has
(have) been thoroughly and completely decontaminated and neutralized of such substances and contamination. I have also attached a
Material Safety Data Sheet (MSDS) which covers all hazardous material, hazardous substance or toxic materials or substances
exposed to or contacted by the instrument. Furthermore, I understand that this Certificate, or providing a MSDS, shall not waive our
responsibility to provide a neutralized, decontaminated, and clean product for repair to FCI.
Authorized Signature
Date
Cleanliness of a returned item or the acceptability of the MSDS shall be at the sole discretion of FCI.
Any returned item which does not comply with these instructions shall be returned to you at your expense.
Doc. No. 003185 Rev. B
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Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX C - CUSTOMER SERVICE
Document 2. Warranties
Warranties
Goods furnished by the Seller are to be within the limits and of the sizes published by the Seller and subject to the
Seller’s standard tolerances for variations. All items made by the Seller are inspected before shipment, and should
any of said items prove defective due to faults in manufacture or performance under Seller approved applications, or
fail to meet the written specifications accepted by the Seller, they will be replaced or repaired by Seller at no charge
to Buyer provided return or notice of rejection of such material is made within a reasonable period but in no event
longer than three (3) years for non-calibration defects and one (1) year for calibration defects from date of shipment
to Buyer, and provided further, that an examination by Seller discloses to Seller’s reasonable satisfaction that the
defect is covered by this warranty and that the Buyer has not returned the equipment in a damaged condition due to
Buyer’s or Buyer’s employees’, agents’, or representatives’ negligence and Buyer has not tampered, modified,
redesigned, misapplied, abused, or misused the goods as to cause the goods to fail. In addition, this warranty shall
not cover damage caused by Buyer’s exposure of the goods to corrosive or abrasive environments. Moreover, Seller
shall in no event be responsible for (1) the cost or repair of any work done by Buyer on material furnished hereunder
(unless specifically authorized in writing in each instance by Seller), (2) the cost or repair of any modifications added
by a Distributor or a third party, (3) any consequential or incidental damages, losses, or expenses in connection with
or by reason of the use of or inability to use goods purchased for any purpose, and Seller’s liability shall be
specifically limited to free replacement, or refund of the purchase price, at Seller’s option, provided return or
rejection of the goods is made consistent with this paragraph, and the Seller shall in no event be liable for
transportation, installation, adjustment, loss of good will or profits, or other expenses which may arise in connection
with such returned goods, or (4) the design of products or their suitability for the purpose for which they are intended
or used. Should the Buyer receive defective goods as defined by this paragraph, the Buyer shall notify the Seller
immediately, stating full particulars in support of his claim, and should the Seller agree to a return of the goods, the
Buyer shall follow Seller’s packaging and transportation directions explicitly. In no case are the goods to be
returned without first obtaining a return authorization from the Seller. Any repair or replacement shall be at Seller’s
factory, unless otherwise directed, and shall be returned to Seller transportation prepaid by Buyer. If the returned
goods shall prove defective under this clause they will be replaced or repaired by Seller at no charge to Buyer
provided the return or rejection of such material is made within a reasonable period, but in no event longer than (1)
year from the date of shipment of the returned goods or the unexpired terms of the original warranty period
whichever is later. If the goods prove to be defective under this paragraph, the Buyer shall remove the goods
immediately from the process and prepare the goods for shipment to Seller. Continued use or operation of defective
goods is not warranted by Seller and damage occurring due to continued use or operation shall be for Buyer’s
account. Any description of the goods contained in this offer is for the sole purpose of identifying them, and any
such description is not part of the basis of the bargain, and does not constitute a warranty that the goods will conform
to that description. The use of any sample or model in connection with this offer is for illustrative purposes only, is
not part of the basis of the bargain, and is not to be construed as a warranty that the goods will conform to the sample
or model. No affirmation of that fact or promise made by the Seller, whether or not in this offer, will constitute a
warranty that the goods will conform to the affirmation or promise. THIS WARRANTY IS EXPRESSLY IN LIEU
OF ANY AND ALL OTHER EXPRESS OR IMPLIED WARRANTIES WITH RESPECT TO THE GOODS OR
THEIR INSTALLATION, USE, OPERATION, REPLACEMENT OR REPAIR, INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS OF PURPOSE; AND THE GOODS ARE BEING
PURCHASED BY BUYER “AS IS”. SELLER WILL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR
OTHERWISE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL LOSS OR DAMAGE RESULTING
FROM THE USE OR LOSS OF USE OF THE GOODS.
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
APPENDIX E - CE CONFORMANCE
FLUID COMPONENTS INTL
Appendix E. CE Conformance
Approved CE Marking For The MT91 Configuration
Approved Options
1) all insertion U-lengths
2) all specified application combinations
3) 85 to 260 VAC power input.
4) all metallic sensor elements
5) all cable jackets and lengths
6) Aluminum and 300 series stainless steel NEMA 4X local and remote applications.
7) All process connections and flanges
8) All process temperature ranges
Approved Part Numbers
1-15
16 17-18
MT91
2
All options conform to CE marking
requirements.
XY
X or Y options only conform to CE marking
All other configurations must be approved for CE marking conformity by FCI's Engineering Department.
Conditionally Approved CE Marking
24 VDC Factory Selectable Options
Input power of 24 VDC may be optionally selected. Since the manufacturer does not supply the power source or
transformer for these connections, the responsibility for the conditioning of these sources and associated compliance
to the EMC Directive shall be the responsibility of the user.
Panel and Rack Mounted Control Circuit Options
Conditionally approved models included in this family are supplied with panel or rack mounted electronic assemblies
without a remote enclosure (MT91 block 16, codes 1 or 3). Since the manufacturer does not supply an EMC
enclosure for these configurations the associated compliance to the EMC directive shall be the responsibility of the
user.
Installation Conformity Criteria
Grounding
The enclosure must be grounded to earth ground through a path of less than 1 ohm.
Interconnecting Cables
All interconnecting cables between the local enclosure, power source and monitoring device shall be enclosed in
metal conduit. AC power input cabling shall be enclosed separately in conduit before entrance into the instrument
and is not to be combined with switch or monitor output cabling.
Doc. No. 003185 Rev. B
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Model MT91 Multipoint Flowmeter
FLUID COMPONENTS INTL
APPENDIX E - CE CONFORMANCE
Documentation Location
European Location
The technical documentation file part A resides at Fluid Components Intl, European Service Center, Beatrix De
Rijkweg 8, 5657 Eg Einhoven, Netherlands, Phone: 31-40-2-571-972 FAX: 31-40-2-517-809.
Manufacturer Location
The technical documentation file part B resides at the Configuration Management department of Fluid Components
Intl, 1755 La Costa Meadows Dr. San Marcos, CA. 92069 USA, Phone: 1 (800) 854-1993
FAX: 1 (619) 736-6250.
Model MT91 Multipoint Flowmeter
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Doc. No. 003185 Rev. B
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