Micro Motion FDM Operating Manual
Micro Motion® Fork Density Meters
Direct insertion density meter installation
Installation Manual
MMI-20020989, Rev AE
May 2019
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.
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 Europe and Middle East Asia Pacific
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
France 0800 917 901 India 800 440 1468
Central & Eastern +41 (0) 41 7686
Russia/CIS +7 495 981 9811 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
666
111
New Zealand 099 128 804
Japan +81 3 5769 6803
2
Installation Manual Contents
MMI-20020989 May 2019
Contents
Chapter 1 Before you begin............................................................................................................5
1.1 About this manual............................................................................................................................ 5
1.2 Related documentation....................................................................................................................5
Chapter 2 Planning........................................................................................................................ 7
2.1 Installation checklist.........................................................................................................................7
2.2 Best practices................................................................................................................................... 8
2.3 Power requirements......................................................................................................................... 8
2.4 Other installation considerations....................................................................................................10
2.5 Recommended installations for short-stem meters........................................................................ 12
2.6 Perform a pre-installation meter check...........................................................................................14
Chapter 3 Mounting.....................................................................................................................17
3.1 Free stream applications.................................................................................................................17
3.2 T-piece applications........................................................................................................................21
3.3 Mount with a flow-through chamber..............................................................................................26
3.4 Mount in an open tank (long-stem meter)...................................................................................... 28
3.5 Mount in a closed tank (long-stem meter)...................................................................................... 31
3.6 Attach the PFA ring and circlip........................................................................................................ 35
3.7 Rotate the electronics on the meter (optional)............................................................................... 36
3.8 Rotate the display on the transmitter (optional)............................................................................. 37
Chapter 4 Wiring......................................................................................................................... 39
4.1 Terminals and wiring requirements................................................................................................ 39
4.2 Explosion-proof/flameproof or non-hazardous output wiring......................................................... 39
4.3 Processor wiring for remote-mount 2700 fieldbus..........................................................................43
4.4 Wiring to external devices (HART multidrop)..................................................................................48
4.5 Wiring to signal converters and/or flow computers........................................................................ 49
Chapter 5 Grounding....................................................................................................................51
Installation Manual iii
Contents Installation Manual
May 2019 MMI-20020989
iv Micro Motion Fork Density Meter
Installation Manual Before you begin
MMI-20020989 May 2019
1 Before you begin
1.1 About this manual
This manual provides information on planning, mounting, and wiring the FDM.
Important
This manual assumes that the following conditions apply:
• The device has been installed correctly and completely according to the instructions in
the installation manual
• The installation complies with all applicable safety requirements
• The user is trained in government and corporate safety standards
1.2 Related documentation
You can find all product documentation on the product documentation DVD shipped with
the product or at www.emerson.com.
See any of the following documents for more information:
• Micro Motion Fork Density Meters (FDM) Product Data Sheet
• Micro Motion Fork Density Meters (FDM) Configuration and Use Manual
• Micro Motion Fork Density Meters (FDM) with FOUNDATION™ Fieldbus Configuration and Use
Manual
• Micro Motion Model 1700 and 2700 Installation Manual
• Modbus Interface Tool
• Micro Motion Enhanced Density Application Manual
Installation Manual 5
Before you begin Installation Manual
May 2019 MMI-20020989
6 Micro Motion Fork Density Meter
Installation Manual Planning
MMI-20020989 May 2019
2 Planning
2.1 Installation checklist
□ Verify the contents of the product shipment to confirm that you have all parts and
information necessary for the installation.
□ Verify that the meter calibration-type code corresponds to the pipe size. If it does not,
measurement accuracy may be reduced due to the boundary effect.
□ Make sure that all electrical safety requirements are met for the environment in which
the meter will be installed.
□ Make sure that the local ambient and process temperatures and process pressure are
within the limits of the meter.
□ Make sure that the hazardous area specified on the approval tag is suitable for the
environment in which the meter will be installed.
□ Make sure that you will have adequate access to the meter for verification and
maintenance.
□ Verify that you have all equipment necessary for your installation. Depending on your
application, you may be required to install additional parts for optimal performance of
the meter.
□ If your meter will be wired to a remote-mount 2700 FOUNDATION
— Refer to the instructions in this manual for preparing the 4-wire cable and wiring to
the processor connections.
— Refer to the instructions in the transmitter installation manual for mounting and
wiring the 2700 fieldbus transmitter.
— Consider the maximum cable length between the meter and transmitter. The
maximum recommended distance between the two devices is 1,000 ft (305 m).
Use Micro Motion cable.
™
Fieldbus transmitter:
Installation Manual 7
Planning Installation Manual
May 2019 MMI-20020989
2.2 Best practices
The following information can help you get the most from your meter.
• Handle the meter with care. Follow local practices for lifting or moving the meter.
• Perform a Known Density Verification (KDV) check of the meter prior to installing the
meter.
• For the DLC-coated tines, always fit the protective cover over the tines when the meter
is not in use. The tine coating is not resistant to impact damage.
• Always store and transport the meter in its original packaging. For the long-stem
meters, be sure to include the transit cover secured by the grub screws.
• Do not use liquids that are incompatible with the materials of construction.
• Do not expose the meter to excessive vibration (greater than 0.5 g continuously).
Vibration levels in excess of 0.5 g can affect the meter accuracy.
• For optimal performance of the meter, ensure that operating conditions correspond to
the meter calibration-type code and boundary.
• Ensure that all piping connections conform to the local and national regulations and
codes of practice.
• Properly tighten the transmitter housing cover after wiring to maintain ingress
protection and hazardous area approvals.
• After installation, pressure test the meter and the associated pipework to 1½ times the
maximum operating pressure.
• Install thermal insulation in the meter, the inlet, and the bypass-loop pipeline to
maintain stable temperatures. The thermal insulation should cover the process
connection.
2.3 Power requirements
Following are the DC power requirements to operate the meter:
• 24 VDC, 0.65 W typical, 1.1 W maximum
• Minimum recommended voltage: 21.6 VDC with 1,000 ft (305 m) of 24 AWG
(0.205 mm²) power-supply cable
• At startup, power source must provide a minimum of 0.5 A of short-term current at a
minimum of 19.6 V at the power-input terminals.
8 Micro Motion Fork Density Meter
300ft 600ft 900ft 1200ft 1500ft 1800ft 2100ft 2400ft 2700ft 3000ft
B
2 1 . 6V
24 V
14
15
16
17
18
19
20
21
22
23
24
25
26
A
91.44m 182.88m 274.32m 365.76m 457.2m 548.64m 640.08m 731.52m 822.96m 914.4m
0 . 00 0
0.100
0.200
0.300
0.400
0.500
0.600
0.700
10 0m 20 0m 30 0m 40 0m 50 0m 60 0m 70 0m 80 0m 90 0m 100 0m
B
2 1 . 6V
24 V
A
328.084 ft 656.168ft 984.253ft 1312.34ft 1640.42ft 1968.5ft 2296.59ft 2624.67ft 2952.76ft 3280.84ft
Installation Manual
Planning
MMI-20020989 May 2019
Power cable recommendations for explosion-proof/flameproof meters
Figure 2-1: Minimum wire gauge (AWG per foot or meter)
A. AWG maximum
B. Distance of installation
Figure 2-2: Minimum wire area (mm2 per meter or foot)
Installation Manual 9
A. Minimum wire area (mm2)
B. Distance of installation
Planning
May 2019 MMI-20020989
Installation Manual
2.4 Other installation considerations
Numerous external factors can affect the meter's successful operation. To ensure that your
system works correctly, consider the factors covered in this section when designing your
installation.
2.4.1 Boundary effect
Boundary effect refers to the distortion in the wave forms in the process fluid that are
caused by reflections from the pipe wall. If the pipe wall is within the meter's effective
measurement region, the boundary effect produces measurement inaccuracy.
Figure 2-3: Region of measurement boundary or sensitivity (plan view)
2.4.2
2.4.3
A. Sensitive, or effective, region
The factory calibration compensates for the boundary effect. The meter can be calibrated
for free stream, 2 in (51 mm), 2.5 in (64 mm), or 3 in (76 mm) pipe. If the meter is installed
in a pipe that does not match the calibration size, the compensation will be inaccurate,
and process measurement will be inaccurate.
Verify that the meter was calibrated for the pipe size you plan to use.
Flow rates
Maintain constant flow rates and velocities that are within the limits specified for the
meter. The fluid flow provides a steady heat flow into the meter installation, and the flow
rate influences the self-cleaning of the meter tines, the dissipation of bubbles, and the
solid contaminants around the meter.
If you install the meter in a bypass configuration (such as in a flow-through chamber), use
a pressure drop across an orifice plate in the main process pipe, a pitot scoop
arrangement, or a sample pump to maintain flow. When using a sample pump, place the
pump upstream from the meter.
Entrained gas
Entrained gas, or gas pockets, can disrupt the measurement of a fluid. A brief disruption in
the signal caused by transient gas pockets can be corrected in the meter configuration,
10 Micro Motion Fork Density Meter
Installation Manual
MMI-20020989 May 2019
but you must avoid more frequent disruptions or serious gas entrainment to ensure
accurate and reliable fluid measurement.
To minimize the possibility of entrained gas:
• Keep pipelines full of fluid at all times.
• Vent any gas prior to the meter installation location.
• Avoid sudden pressure drops or temperature changes that may cause dissolved gases
to break out of the fluid.
• Maintain a back pressure on the system that is sufficient to prevent gas breakout.
• Maintain flow velocity at the sensor within the specified limits.
Planning
2.4.4 Slurry measurement
To ensure quality measurement when solids are present:
• Avoid sudden changes of the fluid velocity that may cause sedimentation.
• Install the meter far enough downstream from any pipework configuration that may
cause centrifuging of solids (such as at a pipe bend).
2.4.5
• Maintain flow velocity at the meter installation that is within the specified limits.
Temperature gradients and insulation
For high-viscosity fluids, minimize any temperature gradients in the fluid, and in the piping
and fittings immediately upstream and downstream of the meter. Minimizing
temperature gradients reduces the effect of viscosity changes. Use the following
guidelines to reduce the thermal effects to your meter installation:
• Always insulate the meter and surrounding pipework thoroughly.
— Avoid insulating the transmitter housing.
— Use rock wool or any equivalent heat jacket material that is at least 1 in (25 mm)
thick, but preferably 2 in (51 mm) thick.
— Enclose insulation in a sealed protective casing to prevent moisture ingress, air
circulation, and crushing of the insulation.
— For flow-through chamber installations, use the special insulation jacket provided
by Micro Motion.
• Avoid direct heat or cold on the meter or on the associated upstream or downstream
pipe work that is likely to create temperature gradients.
• If it is necessary to protect against cooling because of flow loss, you can apply
electrical-trace heating. If you use electrical-trace heating, use a thermostat that
operates below the minimum operating temperature of the system.
2.4.6
Installation Manual 11
Pressure and temperature limits for process connections
You must ensure that the pressure and temperature limits for the meter are not exceeded
– if necessary, by the use of suitable safety accessories. Pressure and temperature ratings
Planning Installation Manual
May 2019 MMI-20020989
for the meter connections are in accordance with the relevant flange standard. Check the
latest standards for your connections.
For the pressure and temperature limits for Zirconium 702 process connections, see Table
2-1.
Table 2-1: Pressure/temperature ratings for Zirconium 702 process connections
Process
flange
type
2 in
(51 mm)
ANSI 150
2 in
(51 mm)
ANSI 300
DN50
PN16
DN50
PN40
Pressure and temperature ratings
100 °F (37.8 °C) 199.9 °F (93.28 °C) 299.8 °F (148.78 °C) 392 °F (200.0 °C)
226.3 psi
(15.603 bar)
588.9 psi
(40.603 bar)
229.2 psi
(15.803 bar)
571.5 psi
(39.404 bar)
197.3 psi
(13.603 bar)
513.4 psi
(35.398 bar)
175.5 psi
(12.100 bar)
439.5 psi
(30.302 bar)
159.5 psi
(10.997 bar)
417.7 psi
(28.799 bar)
137.8 psi
(9.501 bar)
342.3 psi
(23.601 bar)
110.2 psi
(7.598 bar)
336.5 psi
(23.201 bar)
1107.3 psi
(7.398 bar)
266.9 psi
(18.402 bar)
2.5 Recommended installations for short-stem meters
Micro Motion recommends three standard installations for the short-stem meter to
alleviate any need for onsite calibration. All meters are factory calibrated for these types of
installations and take into consideration the potential boundary effect of each installation.
Free stream applications
Flow rate
Viscosity Up to 20,000 cP
Temperature • -58 °F (-50.0 °C) to 392 °F (200.0 °C)
Main flow pipe size • Horizontal pipe: minimum diameter, 4 in (102 mm)
Advantages • Simple installation in large bore pipes
Recommendations Do not use with:
12 Micro Motion Fork Density Meter
0.3 to 0.5 m/s at the meter
• -40 °F (-40.0 °C) to 392 °F (200.0 °C) in hazardous areas
• Vertical pipe: minimum diameter, 6 in (152 mm)
• Ideal for clean fluids and non-waxing oils
• Suitable for line density measurement and simple referrals
• Low or unstable flow rates
• For small bore pipes
Installation Manual Planning
MMI-20020989 May 2019
T-piece applications
Flow rate 0.5 to 3 m/s at main pipe wall
By increasing the insertion depth of the tines into the T-piece, the
flow velocity can be increased to 5 m/s for clean fluids. For slurry
applications, the maximum flow velocity should be no greater
than 4 m/s.
Viscosity • For the 2 in (51 mm) (DN50) T-piece, viscosity limit is 100 cP
(200 cP in some cases).
• For the 3 in (76 mm) ( (DN80) T-piece, the viscosity limit is
1000 cP.
Temperature -58 °F (-50.0 °C) to 392 °F (200.0 °C)
Main flow pipe size Minimum diameter, 2 in (51 mm)
Advantages • Simple installation in large bore pipes
• Ideal for clean fluids and non-waxing oils
• 3 in (76 mm) T-Piece installation ideal for high percentage
slurry applications
• Suitable for line density measurement and simple referrals
Recommendations Do not use with:
• Low or unstable flow rates
• Where step changes in viscosity can occur
• For small bore pipes
• Where temperature effects are significant
Flow-through chamber applications
Flow rate
Viscosity • For the 2 in (51 mm) (DN50) Flow Chamber, viscosity limit is
Temperature -58 °F (-50.0 °C) to 392 °F (200.0 °C)
Main flow pipe size Suitable for all sizes, if mounted in a bypass (slipstream)
• 5–40 l/min for 2 in (51 mm) Schedule 40 calibration bore
section (1.5 - 10.5 gal/min)
• 5–300 l/min for 3 in (76 mm) Schedule 80 calibration bore
section (1.5 - 80 gal/min)
100 cP (200 cP in some cases).
• For the 3 in (76 mm) (DN80) Flow Chamber, the viscosity
limit is 1000 cP.
configuration
Installation Manual 13
Planning Installation Manual
May 2019 MMI-20020989
Advantages • Adaptable installation to any diameter main pipe and for tank
applications
• Ideal for flow and temperature conditioning
• Suitable for complex referrals and for use with heat
exchangers
• Suitable for step changes in viscosity
• Fast response
• Ideal for analyzer cubicles
Recommendations • Do not use with uncontrolled flow rates.
• Careful system design is required to ensure representative
measurement.
• Frequently requires the use of a pump.
2.6 Perform a pre-installation meter check
Check the meter prior to installation to confirm that no damage occurred to the meter
during shipment.
Procedure
1. Remove the meter from the box.
CAUTION
Handle the meter with care. Follow all corporate and government safety
regulations for lifting and moving the meter.
2. Visually inspect the meter for any physical damage.
If you notice any physical damage to the meter, immediately contact customer
support at flow.support@emerson.com.
3. Position and secure the meter in a vertical position with the flow arrow pointing
upward.
4. Connect the power wiring, and power up the meter.
Remove the back transmitter housing cover to access the PWR terminals.
14 Micro Motion Fork Density Meter
Installation Manual Planning
MMI-20020989 May 2019
Figure 2-4: Power supply wiring terminals
A. 24 VDC
5. Perform a Known Density Verification (KDV) check.
Use the Known Density Verification procedure to match the current meter
calibration with the factory calibration. If the meter passes the test, then it has not
drifted or changed during shipment.
For more information on performing a KDV check, see the configuration and use
manual that shipped with the product.
Installation Manual 15
Planning Installation Manual
May 2019 MMI-20020989
16 Micro Motion Fork Density Meter
Installation Manual
MMI-20020989 May 2019
Mounting
3 Mounting
If the meter's flow velocity is:
• Below 0.3 to 0.5 m/s, install the meter as a free-stream application.
• Above 0.3 to 0.5 m/s, install the meter as either a T-piece or flow chamber application.
As an alternative, if the pipework can be expanded to reduce the flow velocity to
between 0.3 to 0.5 m/s, install a free stream application.
3.1 Free stream applications
3.1.1 Mount in free-stream application (flanged fitting)
Prerequisites
• Free-stream (flanged) installations are recommended for processes with the following
conditions:
Flow 0.3 to 0.5 m/s at the meter
Viscosity
Temperature -58 °F (-50.0 °C) to 392 °F (200 °C)
Note
If temperature variations are a critical factor in your process, the reduced thermal mass
of the taper-lock fitting of the weldolet can track changes in temperature more
efficiently.
• Before fitting the weldolet, you must bore a 2.1 in (53 mm) diameter opening in the
pipeline to accept the meter. You must weld the weldolet to the pipeline concentrically
with the pre-bored hole.
Procedure
Use Figure 3-1 to mount a meter in a free-stream flanged fitting installation.
• Insert meter tines directly into the fluid flow.
• For both vertical and horizontal pipes, always install the meter on the side of the pipe.
For a horizontal pipe, never mount the meter on the top of the pipe.
Important
During installation, always position the meter so that the gap between the tines is vertical.
This position helps prevent the trapping of bubbles or solids on the meter – allowing the
solids to sink and the bubbles to rise. You can use the scribe mark on the spigot (located
between the flange and transmitter) as a reference for the tine orientation. Always orient
the meter so the scribe mark is at either the 12 o’clock or 6 o’clock position.
The gap between the fork tines must always be vertical so that:
— Up to 500 cP with long tines
— Up to 20,000 cP with short tines
-40 °F (-40.0 °C) to 392 °F (200 °C) in hazardous areas
Installation Manual 17
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