Emerson Rosemount 3818 Programming manual

Rosemount™ 3818 LNG Liquid Ultrasonic
Meter
for Cryogenic Liquefied Natural Gas Applications
Maintenance and Troubleshooting Manual
00809-0100-3818, Rev AA
April 2022

Safety and approval information
This Rosemount product complies with all applicable European directives when properly installed in accordance with the
instructions in this manual. Refer to the EU declaration of conformity for directives that apply to this product. The EU declaration
of conformity, with all applicable European directives, and the complete ATEX Installation Drawings and Instructions are available
on the internet at www.emerson.com or through your local Emerson support center.
Information affixed to equipment that complies with the Pressure Equipment Directive, can be found on the internet at http://
www.emerson.com.
For hazardous installations in Europe, refer to standard EN 60079-14 if national standards do not apply.
Other information
Full product specifications can be found in the product data sheet. Troubleshooting information can be found in the user manual.
Product data sheets and manuals are available from the Emerson website at http://www.emerson.com.
Return policy
Follow Emerson procedures when returning equipment. These procedures ensure legal compliance with government
transportation agencies and help provide a safe working environment for Emerson employees. Emerson will not accept your
returned equipment if you fail to follow Emerson procedures. Return procedures and forms are available on our web support site
at www.emerson.com, or by phoning the Emerson Customer Service department.
Emerson Flow customer service
Email:
•Worldwide: http://[email protected]
•Asia-Pacific: http://[email protected]
Telephone:
North and South America Europe and Middle East Asia Pacific
United States 800 522 6277 U.K. 0870 240 1978 Australia 800 158 727
Canada [phone] The Netherlands [phone] New Zealand 099 128 804
Mexico [phone] France 0800 917 901 India 800 440 1468
Argentina [phone] Germany 0800 182 5347 Pakistan 888 550 2682
Brazil [phone] Italy 8008 77334 China [phone]
Central & Eastern [phone] Japan [phone]
Russia/CIS [phone] South Korea [phone]
Egypt 0800 000 0015 Singapore [phone]
Oman 800 70101 Thailand 001 800 441 6426
Qatar 431 0044 Malaysia 800 814 008
Kuwait 663 299 01
South Africa 800 991 390
Saudi Arabia 800 844 9564
UAE 800 0444 0684

Contents
Maintenance and Troubleshooting Manual
00809-0100-3818 April 2022
Rosemount™ 3818 LNG Liquid Ultrasonic Meter i
Contents
Section 1: Routine maintenance
1.1 Meter maintenance ..................................................................................... 1
1.2 Routine Maintenance ................................................................................... 3
1.2.1 Maintenance logs and reports........................................................................... 3
Section 2: Troubleshooting
2.1 Meter status alarms ..................................................................................... 7
2.1.1 Check status ..................................................................................................... 8
2.1.2 System alarm .................................................................................................. 10
2.1.3 Chord A, Chord B, Chord C and Chord D alarm ................................................ 10
2.1.4 Field I/O alarm................................................................................................. 10
2.1.5 Validity alarm.................................................................................................. 10
2.1.6 Comms alarm ................................................................................................. 10
2.1.7 Communications ............................................................................................ 11
2.2 Troubleshooting the meter ........................................................................ 11
2.2.1 Meter maintenance......................................................................................... 19
2.2.2 Unable to connect direct serial or external serial modem ................................ 29
2.2.3 Unable to connect to meter ............................................................................ 29
2.2.4 Ethernet connections...................................................................................... 29
2.2.5 Direct serial connections................................................................................. 29
2.3 Troubleshoot Maintenance log files and trend files ....................................... 30
2.3.1 Files do not appear in workbook...................................................................... 30
2.3.2 Microsoft® Excel® Log/Export Options are not Available................................ 30
2.3.3 Maintenance Logs or Trend files are not created ............................................. 31
2.3.4 Windows® XP with Security Update ............................................................... 34

ii Contents
Maintenance and Troubleshooting ManualContents
April 2022 00809-0100-3818
Section 3: Meter maintenance
3.1 Removing the shrouds ...............................................................................38
3.1.1 Removing the band shrouds ...........................................................................39
3.2 Re-wetting the transducers .......................................................................44
3.3 Replacing the transducer assembly .............................................................51
3.4 Replacing the meter electronics..................................................................55
3.4.1 Transmitter electronics maintenance ..............................................................56
3.4.2 Replacing the CPU Module ..............................................................................57
3.4.3 Replacing the fuse...........................................................................................59
3.4.4 Replacing the Backplane .................................................................................60
3.4.5 Replacing the I.S. Barrier board........................................................................63
3.4.6 Replacing the Power Supply Board ..................................................................65
3.4.7 Replacing the Acquisition Module ...................................................................67
3.4.8 Replacing the Acquisition cable or synchronization cable ................................70
3.5 Installing the shrouds ................................................................................71
3.6 Sealing the meter ......................................................................................76
3.6.1 Sealing the transmitter electronics enclosure..................................................76
3.6.2 Sealing the Bracket/Cover and Base electronics enclosure...............................77
Appendix A: Conversion factors
A.1 Conversion factors per units of measurement................................................................... 79
A.2 K Factor conversions ......................................................................................................... 80
Appendix B: Engineering Drawings
B.1 Rosemount 3810 Series Ultrasonic Flow Meter Drawings.................................................. 81
Appendix C: Index
C.1 Manual index..................................................................................................................... 83

List of TablesMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
List of Tables iii
List of Tables
Table 2-1 Troubleshooting........................................................................................................... 12
Table 2-2 Maintenance ................................................................................................................ 21
Table 3-1 Contents-Transducer maintenance .............................................................................. 35
Table 3-2 Shroud removal tool list ............................................................................................... 39
Table 3-3 Transducer maintenance tools and shop supplies list ................................................... 45
Table 3-4 Electronics maintenance tools list ................................................................................ 55
Table 3-5 Shroud removal tool list ............................................................................................... 71
Table A-1 Conversion factors per units of measurement............................................................... 79

iv List of Tables
List of Tables Maintenance and Troubleshooting Manual
April 2022 00809-0100-3818

List of FiguresMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
List of Figures v
List of Figures
Figure 1-2 Maintenance log collection parameters........................................................................ 3
Figure 1-3 Trend log collection ...................................................................................................... 4
Figure 1-4 Archive log collection parameters................................................................................. 5
Figure 2-1 Meter Monitor status alarms......................................................................................... 7
Figure 2-2 Meter Monitor (Detailed) view...................................................................................... 7
Figure 2-3 Monitor page Check status and Status Summary .......................................................... 8
Figure 2-4 Monitor page Check status and Status Summary .......................................................... 9
Figure 2-5 Meter Monitor (Summary) view ................................................................................. 19
Figure 2-6 Meter Monitor (Detailed) view ................................................................................... 20
Figure 2-7 Excel® 2000 Tools Menu ............................................................................................ 31
Figure 2-8 Excel® Trusted Access Setting .................................................................................... 32
Figure 2-9 Excel® 2007 Tools Menu ............................................................................................ 32
Figure 2-10 Excel® 2007 Developer tab - Macro Security .............................................................. 33
Figure 3-2 3818 LNG Meter top assembly ................................................................................... 38
Figure 3-3 Top shroud disassembly ............................................................................................ 40
Figure 3-4 Shroud worm screw assembly .................................................................................... 41
Figure 3-5 Clamped shroud worm screw parts ............................................................................ 42
Figure 3-6 Band shroud hem bend joint....................................................................................... 43
Figure 3-7 LT-07 transducer assembly ......................................................................................... 44
Figure 3-8 3818 meter with thermal wrap ................................................................................... 46
Figure 3-9 Transducer assembly removal..................................................................................... 47
Figure 3-10 LT-07 Transducer assembly removed from transducer housing .................................. 47
Figure 3-11 Re-wetting the LT-07 transducer face ......................................................................... 48
Figure 3-12 Re-installing the thermal wrap.................................................................................... 49
Figure 3-13 LT-07 Transducer assembly ........................................................................................ 51
Figure 3-14 LT-07 Transducer assembly removed from transducer housing .................................. 52
Figure 3-15 LT-07 transducer and transducer cable wiring............................................................. 53
Figure 3-16 3818 LNG Liquid Ultrasonic Flow Meter electronics .................................................... 56
Figure 3-17 CPU replacement ...................................................................................................... 57
Figure 3-18 Fuse holder cap .......................................................................................................... 59
Figure 3-19 Backplane board replacement .................................................................................... 61
Figure 3-20 I.S. Barrier board replacement ................................................................................... 63
Figure 3-21 Power Supply Board replacement .............................................................................. 65

vi List of Figures
List of Figures Maintenance and Troubleshooting Manual
April 2022 00809-0100-3818
Figure 3-22 Bracket/Cover plate removal.......................................................................................67
Figure 3-23 Acquisition Module cable and transducer wiring ........................................................68
Figure 3-24 Acquisition Module cable or Synchronization cable ....................................................70
Figure 3-25 Band shroud hem bend joint .......................................................................................72
Figure 3-26 Band shroud assembly ................................................................................................73
Figure 3-27 Top shroud attachment points ...................................................................................74
Figure 3-28 Top shroud assembly ..................................................................................................75
Figure 3-29 Transmitter electronics enclosure security latch .........................................................76
Figure 3-30 Base Enclosure security seals ......................................................................................77

Section 1: Routine maintenanceMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
Meter maintenance 1
11
Section 1: Routine maintenance
1.1 Meter maintenance
This section includes discussion of the maintenance of Rosemount 3818 LNG Liquid
Ultrasonic Flow Meters.
For reference, you may download the MeterLink Quick Start Manual from:
Emersonprocess.com/en-US/brands/Flow/ultrasonics/Pages/MeterLink.aspx
SURFACE TEMPERATURE HAZARD
The meter body and piping may be extremely cold.
Wear appropriate personal protective equipment when coming in contact with the meter. Failure to do so may
result in injury.
TRANSPORTATION HAZARD
When moving the meter, do not insert the forks of a forklift into the bore.
Inserting the forks may cause the meter to become unstable, resulting in injury or damage to the bore and
sealing face.
TRIPPING HAZARD
Clear all obstacles or obstructions from the work area when transporting, installing or removing the
meter.
Failure to clear the work area may cause injury to personnel.
Prior to lifting the unit, refer to the flow meter nameplate or outline dimensional (general arrangement)
drawing for the assembled weight.

2 Meter maintenance
Maintenance and Troubleshooting ManualSection 1: Routine maintenance
April 2022 00809-0100-3818
CRUSHING HAZARD
Do not remove flange stabilizers.
Attempting to do so may allow the meter to roll, resulting in serious injury or equipment damage.
A.
A. Flange stabilizers
ESCAPING FLUIDS HAZARD
The purchaser of the meter is responsible for the selection of Rosemount components/seals and
materials compatible with the chemical properties of the measurement fluid.
Failure to select suitable meter components/seals may cause escaping fluids, resulting in injury or equipment
damage.
.

Section 1: Routine maintenanceMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
Routine Maintenance 3
1.2
1.2.1
Routine Maintenance
Routine maintenance operations requires adherence to all applicable regulations and laws and
safety training for personnel to perform the maintenance operations. Review your
organization’s best practices procedures before performing routine maintenance.
Maintenance logs and reports
To monitor the performance health of the meter, and ensure it is operating within acceptable
specifications, routine diagnostics should be performed. Collecting a maintenance log gives
you a snapshot of the current health of the meter and you can compare the inspection reports
from previously saved logs. Use the Logs/Reports menu and click Maintenance Logs and
Reports. MeterLink displays the Maintenance Logs and Reports dialog. Choose the time
duration, log format and collection rate for the output file and click the Start button. You can
open the file immediately after it is generated or view it at a later time. It is recommended that a
Maintenance log be collected after an upset in the system.
In establishing a baseline to be used for the trending of the meter diagnostics, it is very helpful if
a set of log files are collected immediately after the meter has been installed in the field.
Preferably, collect the log files at several velocities within the operating range of the meter. This
helps establish that the flow profile is relatively constant throughout the meters operating
range (except velocities below 3 ft/sec where the profile may vary).
Maintenance log collection
Figure 1-2 Maintenance log collection parameters

4 Maintenance logs and reports
Maintenance and Troubleshooting ManualSection 1: Routine maintenance
April 2022 00809-0100-3818
Trend maintenance log collection
Merging the results of two or more Maintenance logs into a single file, allows you to build a
historical database of the meter’s performance. Trending the logs indicates changes from the
original installation of the meter over time. Looking at a single inspection report, that is either
collected monthly or quarterly, will only give you an indication of the meter's current health.
Figure 1-3 Trend log collection
This is important since many diagnostics change slowly over time. Trending the maintenance
logs helps identify these changes and makes problems much more obvious than merely
viewing a single inspection report. The Trending feature is integral to MeterLink which allows
all important parameters to be trended. MeterLink supports trending files in a Microsoft®
Excel® workbook from multiple 3818 meter maintenance logs. Some parameters like gain,
signal level, and noise level may show a shift over time which can be useful in detecting
changes in the meter and the installation.
Maintenance logs to be trended must all have matching column headings. This means the logs
must be in the same units (i.e. U.S. Customary or Metric), must have the same pressure type (i.e.
gage or absolute), and must have the same time base (1/second, 1/minute, 1/hour, 1/day). If
not, an error message will be displayed stating the column headings do not match and the file
will not be added to the Workbook to trend list.

Section 1: Routine maintenanceMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
Maintenance logs and reports 5
Archive log collection
Archive logs may be collected and the options include:
•Daily log - generated every 24 hours on the Contract Hour.
•Hourly log - generated every hour at the top of the hour.
•Event log - collects the alarm and event log records.
Figure 1-4 Archive log collection parameters
The logs may be collected in a single file or you can choose to collect one type of log. Each of the
Meter Archive logs include the Meter Configuration file.

6 Maintenance logs and reports
Maintenance and Troubleshooting ManualSection 1: Routine maintenance
April 2022 00809-0100-3818

Section 2: TroubleshootingMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
Meter status alarms 7
METERLINK
Section 2: Troubleshooting
2.1 Meter status alarms
Run MeterLink and open the Meter Monitor (Summary) view to perform a diagnostics health
check.
Figure 2-1 Meter Monitor status alarms
If the meter is measuring flow and operating within the established parameters the Meter Status
LED is green. If the Meter Status LED is red, an active alarm exists that requires you to take
corrective action.
Figure 2-2 Meter Monitor (Detailed) view

8 Check status
Maintenance and Troubleshooting ManualSection 2: Troubleshooting
April 2022 00809-0100-3818
2.1.1 Check status
The Status Summary page displays existing alarm conditions for the meter. If all statuses are
good, the Status Summary alarms list is empty.
Figure 2-3 Monitor page Check status and Status Summary
If alarm conditions exist, the summary list is prioritized according to the severity of the
condition. The Status Summary displays the condition showing the most severe alarm first.
Click the Check Status button if any of the LEDs are yellow or red to see more specific
information causing the status alarm. Some alarms do not require an acknowledge and will clear
automatically when the alarm condition goes away. Alarms that require a user to acknowledge
them will have a button to the right titled ACK. Clicking the ACK button changes the button text
to Wait and sends a request to the meter to clear the alarm. The alarm will disappear from the
Check Status dialog once the alarm actually clears.
A. Status summary page with no active alarm condition(s)

Section 2: TroubleshootingMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
Check status 9
Click the Check Status button and MeterLink opens the Status Summary dialog box that gives
a short description of all alarms present.
Figure 2-4 Monitor page Check status and Status Summary
Following is a list and a brief description of the types of alarms:
•System
•Power Loss
•Field I/O
•Validity
•Comms
•Check Status
The alarms are shown with the primary causes listed first. Click the question mark next to the
alarm to display a help topic related to the alarm and recommended actions to resolve the issue.
A. B.
A. Active alarm condition(s) from Meter Monitor page
B. Status summary page with alarm examples

10 System alarm
Maintenance and Troubleshooting ManualSection 2: Troubleshooting
April 2022 00809-0100-3818
2.1.2
2.1.3
System alarm
The System alarm indicates a failure in the hardware that should be addressed by a service
technician. This includes memory checksum errors and communication errors within the
hardware. A Red LED indicates a System alarm condition. Collect a Maintenance log and an
audit/alarm log and then, contact your Emerson Flow service representative.
Chord A, Chord B, Chord C and Chord D alarm
Chord A, Chord B, Chord C, and Chord D - These alarms indicate how a chord is functioning.
2.1.4
2.1.5
2.1.6
Field I/O alarm
Reports various field I/O devices that are in alarm. Click the Check Status button for more
details on specific alarms. The field is grayed out if the Rosemount 3818 LNG Liquid Ultrasonic
Flow Meter does not support this alarm.
Validity alarm
This alarm indicates that the meter may not be measuring accurately. Click Check Status to see a
description of which validity alarms are active. The validity alarms QMeter and QFlow indicate an
issue with the meter collecting enough information from the chords to make an accurate
measurement. The validity alarms for pressure and temperature indicate that the value is above
or below the alarm limits for these values. Red and green are the only colors used for this alarm.
Comms alarm
The Comms alarm indicates that communications between MeterLink and the meter failed.
This could be due to a poor communication link. MeterLink continues to retry
communications. Red and green are the only colors used for this alarm.
LED Color Problem
Green No alarms are present. Chord is operating properly.
Yellow At least one sample in the batch caused an alarm but it did not cause the chord to fail.
The sample will not be used in the batch. Discarding occasional samples can occur
during normal operation such as during flow velocity changes.
Red The chord has failed or is in acquisition. This chord is not used for this batch. Chords
that have failed or are shown to be in acquisition for repeated batches indicates that the
meter should be inspected by a service technician.
Gray The chord has manually been set to inactive.

Section 2: TroubleshootingMaintenance and Troubleshooting Manual
00809-0100-3818 April 2022
Communications 11
2.1.7
2.2
Communications
The Communications Analyzer (via MeterLink Tools> Menu>Communications Analyzer menu
path) displays communications between MeterLink and the ultrasonic meter. This utility is
useful for troubleshooting communications to the meter. It displays many of the TCP/IP
commands between MeterLink and the connected meter.
For troubleshooting communications with the 475 Field Communicator for the HART®
Protocol, refer to Section 5 of the Emerson 475 Field Communicator User’s Manual, Rev D. This
manual may be downloaded from the following location:
http://www2.emersonprocess.com/en-US/brands/Field-Communicator/Pages/Support.aspx
For troubleshooting communications with AMS Device Manager, refer to the help
documentation and support at the following web site:
http://www2.emersonprocess.com/en-US/brands/amssuite/amsdevicemanager/Pages/AMSDeviceMan-
ager.aspx
Troubleshooting the meter
Table 2-1 and the following sections show errors that may occur with the meter hardware,
firmware or connections and recommended actions to resolve the problem(s).
Important
The system temperature must be warmed above zero oCelsius to perform meter maintenance procedures.