Micro Motion Installation Manual: Liquified Natural Gas Meter | Micro Motion Manuals & Guides
Installation Manual
MMI-20032351, Rev AC
August 2019
Micro Motion™ Liquified Natural Gas Meter
Safety messages
Safety messages are provided throughout this manual to protect personnel and equipment. Read each safety message carefully
before proceeding to the next step.
Safety and approval information
This Micro Motion 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 Micro Motion support center.
Information affixed to equipment that complies with the Pressure Equipment Directive, can be found on the internet at
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 configuration
manual. Product data sheets and manuals are available from the Micro Motion web site at www.emerson.com.
Return policy
Follow Micro Motion procedures when returning equipment. These procedures ensure legal compliance with government
transportation agencies and help provide a safe working environment for Micro Motion employees. Micro Motion will not accept
your returned equipment if you fail to follow Micro Motion procedures.
Return procedures and forms are available on our web support site at www.emerson.com, or by phoning the Micro Motion
Customer Service department.
Emerson Flow customer service
Email:
• Worldwide: flow.support@emerson.com
• Asia-Pacific: APflow.support@emerson.com
Telephone:
North and South America
United States 800-522-6277 U.K. 0870 240 1978 Australia 800 158 727
Canada +1 303-527-5200 The Netherlands +31 (0) 704 136
Mexico +41 (0) 41 7686
111
Argentina +54 11 4837 7000 Germany 0800 182 5347 Pakistan 888 550 2682
Brazil +55 15 3413 8000 Italy 8008 77334 China +86 21 2892 9000
Europe and Middle East Asia Pacific
666
France 0800 917 901 India 800 440 1468
Central & Eastern +41 (0) 41 7686
111
Russia/CIS +7 495 995 9559 South Korea +82 2 3438 4600
Egypt 0800 000 0015 Singapore +65 6 777 8211
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
New Zealand 099 128 804
Japan +81 3 5769 6803
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Installation Manual Contents
MMI-20032351 August 2019
Contents
Chapter 1 Planning........................................................................................................................ 5
1.1 Installation checklist.........................................................................................................................5
1.2 Best practices................................................................................................................................... 5
1.3 Power requirements......................................................................................................................... 6
Chapter 2 Architecture...................................................................................................................7
2.1 Architecture of LNG meters with an 820 core processor................................................................... 7
2.2 Architecture of LNG meters with an 800C core processor................................................................. 8
Chapter 3 Mounting.......................................................................................................................9
3.1 Provide for maintenance accessibility............................................................................................... 9
3.2 Mount the LNG sensors.....................................................................................................................9
3.3 Mount the 820 core processor (option 1)....................................................................................... 10
3.4 Mount the I.S. barrier (option 2)..................................................................................................... 11
3.5 Mount the remote 800C core processor (option 2).........................................................................12
Chapter 4 Transmitter power and I/O wiring................................................................................ 15
4.1 Prepare the cable between the host and core processor................................................................. 15
4.2 Prepare the cable between the sensor and core processor..............................................................16
4.3 Wire the core processor to the sensor.............................................................................................18
4.4 Wire the 820 core processor (option 1)...........................................................................................24
4.5 Wire the remote 800C core processor (option 2)............................................................................26
Chapter 5 Grounding....................................................................................................................29
5.1 Ground the 820 core processor...................................................................................................... 29
5.2 Ground the remote 800C core processor........................................................................................30
Installation Manual iii
Contents Installation Manual
August 2019 MMI-20032351
iv Micro Motion Liquified Natural Gas Meter
Installation Manual
MMI-20032351 August 2019
Planning
1 Planning
1.1 Installation checklist
□ If you plan to mount the LNG meter in a hazardous area:
WARNING
Make sure that the hazardous area specified on the approval tag is suitable for the
environment in which the meter will be installed.
□ Verify that the local ambient and process temperatures are within the limits of the LNG
meters.
□ Verify that you are using low-voltage DC power for the core processor. Excess voltage
can damage the core processor.
□ For I.S. applications, refer to Micro Motion ATEX, UL, or CSA installation instructions.
□ Mount the LNG electronics in any orientation as long as the conduit openings do not
point upward.
NOTICE
Upward-facing conduit openings risk condensation entering the housing that can
damage the electronics.
□ Install the sensors so that the flow direction arrow on the case matches the actual
forward flow of the process. (Flow direction is also software-selectable.)
LNGS06
Gas return sensor
1.2 Best practices
LNGM10
Filling sensor
The following information can help you get the most from your sensor.
• There are no pipe run requirements for Micro Motion sensors. Straight runs of pipe
upstream or downstream are unnecessary.
Installation Manual 5
Planning Installation Manual
August 2019 MMI-20032351
• If the sensor is installed in a vertical pipeline, liquids and slurries should flow upward
through the sensor. Gases should flow downward.
• Keep the sensor tubes full of process fluid.
• For halting flow through the sensor with a single valve, install the valve downstream
from the sensor.
• Minimize bending and torsional stress on the sensor. Do not use the sensor to align
misaligned piping.
• The sensor does not require external supports. The flanges will support the sensor in
any orientation.
1.3 Power requirements
• 18 to 30 VDC, 3 watts typical, 5 watts maximum
• Minimum 28 VDC with 300 meters of 1 mm2 power-supply cable
• At startup, power source must provide a minimum of 0.5 amperes of short term
current at a minimum of 18 volts at the electrical parts power input terminals
• The maximum steady state current is 0.2A
• Complies with Installation (Overvoltage) Category II, Pollution Degree 2
Note
Length and conductor diameter of the power cable must be sized to provide 18 VDC
minimum at the power terminals, at a load current of 0.2 amps.
Cable sizing formula
M = 18V + (R x L x 0.2A)
• M: minimum supply voltage
• R: cable resistance
• L: cable length
Table 1-1: Typical power cable resistance at 68 °F (20.0 °C)
Wire gauge Resistance
14 AWG 0.0050 Ω/ft
16 AWG 0.0080 Ω/ft
18 AWG 0.0128 Ω/ft
20 AWG 0.0204 Ω/ft
2.5 mm
1.5 mm
1.0 mm
0.75 mm
0.50 mm
2
2
2
2
2
0.0136 Ω/m
0.0228 Ω/m
0.0340 Ω/m
0.0460 Ω/m
0.0680 Ω/m
6 Micro Motion Liquified Natural Gas Meter
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Installation Manual Architecture
MMI-20032351 August 2019
2 Architecture
2.1 Architecture of LNG meters with an 820 core processor
The following graphic describes LNG meters connected to a dual enhanced 820 core
processor.
A. LNGS06 for returning measurement
B. 9-wire cable
C. 9-wire cable
D. LNGM10 for filling measurement
E. Dual enhanced 820 core processor
F. User-supplied power cable
G. DC power supply
H. User-supplied RS-485 cable
I. Remote host
Installation Manual 7
J. Hazardous area
K. Safe area
Architecture Installation Manual
August 2019 MMI-20032351
2.2 Architecture of LNG meters with an 800C core processor
The following illustration describes the architecture for LNG meters with remote 800C
core processors and an MVD Direct Connect I.S. barrier.
A. LNGM10 for filling measurement or LNGS06 for gas return
B. 9-wire cable
C. Remote 800C core processor
D. 4-wire cable
E. Barrier
F. User-supplied RS-485 cable
G. User-supplied power cable
H. DC power supply
I. Remote host
J. Hazardous area
K. Safe area
8 Micro Motion Liquified Natural Gas Meter
Installation Manual Mounting
MMI-20032351 August 2019
3 Mounting
3.1 Provide for maintenance accessibility
Mount the electronics enclosure in a location and orientation that satisfies the following
conditions:
• Allows sufficient clearance to open the enclosure cover. Micro Motion recommends
7.88 in (200 mm) to 9.85 in (250 mm) clearance at the rear of the electronics
enclosure.
• Provides clear access for installing cabling to the enclosure.
3.2 Mount the LNG sensors
Use best practices to minimize torque and bending load on process connections.
CAUTION
Do not lift the sensor by the electronics or cable as this can damage the device.
Procedure
1. Mount the gas return sensor (the LNGS06).
• Do not use the sensor to support the piping.
• The sensor does not require external supports. The flanges will support the
sensor in any orientation.
2. Mount the filling sensor (the LNGM10).
Installation Manual 9
Mounting Installation Manual
August 2019 MMI-20032351
• Do not use the sensor to support the piping.
• The sensor does not require external supports. The flanges will support the
sensor in any orientation.
3.3 Mount the 820 core processor (option 1)
Use this procedure if you are mounting a dual enhanced 820 core processor.
Procedure
Attach the device to an instrument pole or wall. For a pipe mount, two user-supplied Ubolts are required. Contact Micro Motion to obtain a pipe-mount installation kit if
required.
Figure 3-1: Pipe mount
10 Micro Motion Liquified Natural Gas Meter
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