Micro Motion ELITE Operating Manual

Installation Manual

20002158, Rev DL

July 2017

Micro Motion® ELITE® Coriolis Flow and Density
Sensors

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: [e-mail]

• Asia-Pacific: [e-mail]

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

Contents

Chapter 1 Planning ...........................................................................................................................1

1.1 Installation checklist .......................................................................................................................1

1.2 Best practices .................................................................................................................................3

1.3 Temperature limits .........................................................................................................................3

1.4 Recommendations for hygienic and self-draining applications ....................................................... 6

Chapter 2 Mounting .........................................................................................................................8

2.1 Recommendations for lifting heavy meters .................................................................................... 8

2.2 Mount the sensor ......................................................................................................................... 10

2.3 Rotate junction box or 800 core processor (optional) ................................................................... 11

2.4 Mount electronics of high-temperature sensors ...........................................................................12

2.5 Mount a CMF010 sensor to a wall or pole ..................................................................................... 16

2.6 Mount a CMFS007, CMFS010 or CMFS015 sensor in a bracket ......................................................17

2.7 Mount a CMFS025, CMFS040 or CMFS050 sensor in a wall mount bracket ................................... 18

2.8 Secure wafer-style process connections ....................................................................................... 19

2.9 Attach extended electronics .........................................................................................................20

Chapter 3 Transmitter power and I/O wiring .................................................................................. 22

3.1 Options for wiring ........................................................................................................................ 22

3.2 Connect 4-wire cable ....................................................................................................................23

3.3 Connect the 9-wire cable ..............................................................................................................27

Chapter 4 Grounding ......................................................................................................................28

Chapter 5 Supplementary information ........................................................................................... 29

5.1 Purge the sensor case ...................................................................................................................29

5.2 Pressure relief ...............................................................................................................................32

Installation Manual i

Contents

ii Micro Motion ELITE

1 Planning

Topics covered in this chapter:

Installation checklist

•

Best practices

•

Temperature limits

•

Recommendations for hygienic and self-draining applications

•

1.1 Installation checklist

□

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
meter.

□

If your sensor has an integral transmitter, no wiring is required between the sensor
and transmitter. Follow the wiring instructions in the transmitter installation manual
for signal and power wiring.

□

If your transmitter has remote-mounted electronics, follow the instructions in this
manual for wiring between the sensor and the transmitter, and then follow the
instructions in the transmitter installation manual for power and signal wiring.

Planning

Maximum lengths for Micro Motion cableTable 1-1:

Cable type To transmitter Maximum length

Micro Motion 9-wire 9739 MVD transmitter 1000 ft (300 m)

All other MVD transmit­ters

Micro Motion 4-wire All 4-wire MVD transmit-

ters

Maximum lengths for user-supplied 4-wire cableTable 1-2:

Wire function Wire size Maximum length

Power (VDC) 22 AWG (0,35 mm2) 300 ft (90 m)

20 AWG (0,5 mm2) 500 ft (150 m)

18 AWG (0,8 mm2) 1000 ft (300 m)

Signal (RS-485) 22 AWG (0,35 mm2) or larger 1000 ft (300 m)

□

For optimal performance, install the sensor in the preferred orientation. The sensor
will work in any orientation as long as the flow tubes remain full of process fluid.

60 ft (20 m)

- 1000 ft (300 m) without Ex-approval

- 500 ft (150 m) with IIC rated sensors

- 1000 ft (300 m) with IIB rated sensors

Installation Manual 1

Planning

Preferred sensor orientationTable 1-3:

Process

Liquids

Gases

Preferred orienta-

tion

Alternate orientations

Slurries

□

Install the meter so that the flow direction arrow on the sensor case matches the
actual forward flow of the process. (Flow direction is also software-selectable.)

2 Micro Motion ELITE

1.2 Best practices

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.

• 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 meter. Do not use the meter to align

misaligned piping.

• The sensor does not require external supports. The flanges will support the sensor in

any orientation. (Some sensor models installed in very small, flexible pipeline have
optional installation instructions that allow for external supports.)

Planning

1.3 Temperature limits

Sensors can be used in the process and ambient temperature ranges shown in the
temperature limit graphs. For the purposes of selecting electronics options, temperature
limit graphs should be used only as a general guide. If your process conditions are close to
the gray area, consult with your Micro Motion representative.

Note

• In all cases, the electronics cannot be operated where the ambient temperature is

below –40 °F (–40 °C) or above +140 °F (+60 °C). If a sensor is to be used where the ambient
temperature is outside of the range permissible for the electronics, the electronics must be
remotely located where the ambient temperature is within the permissible range, as
indicated by the shaded areas of the temperature limit graphs.

• Temperature limits may be further restricted by hazardous area approvals. Refer to the

hazardous area approvals documentation shipped with the sensor or available at

www.emerson.com.

• The extended-mount electronics option allows the sensor case to be insulated without

covering the transmitter, core processor, or junction box, but does not affect temperature
ratings. When insulating the sensor case at elevated process temperatures (above 140 °F),
please ensure electronics are not enclosed in insulation as this may lead to electronics failure.

• For the CMFS007 sensor, the difference between the process fluid temperature and the

average temperature of the case must be less than 210°F (99°C)

Installation Manual 3

Planning

Ambient and process temperature limits for ELITE CMFS007, CMFS025–CMFS150
meters

B

113
(45)

Tamb

–40 (–40)

140 (60)

140 (60)

A

B

–148 (–100)

–58 (–50) 400 (204)

T

= Ambient temperature °F (°C)

amb

T

= Process temperature °F (°C)

proc

A = All available electronic options

B= Remote mount electronics only

Ambient and process temperature limits for ELITE CMF***M/L/H/P (excludes special
order cryogenic modifications) and CMFS010-015 meters

140 (60)

Tamb

Tproc

A

140
(60)

B

113
(45)

–40 (–40)

B

–148 (–100)

T

= Ambient temperature °F (°C)

amb

T

= Process temperature °F (°C)

proc

A = All available electronic options

B= Remote mount electronics only

4 Micro Motion ELITE

–400

(–240)

Tproc

400

(204)

Planning

Ambient and process temperature limits for special order cryogenic ELITE meters

140 (60)

Tamb

–40 (–40)

A

B

–148 (–100)

–400

(–240)

T

= Ambient temperature °F (°C)

amb

T

= Process temperature °F (°C)

proc

Tproc

A = All available electronic options

B= Remote mount electronics only

Ambient and process temperature limits for high temperature ELITE meters

140 (60)

176

(80)

Tamb

–40 (–40)

–148 (–100)

T

= Ambient temperature °F (°C)

amb

T

= Process temperature °F (°C)

proc

A = All available electronic options

B= Remote mount electronics only

–58

(–50)

A

B

Tproc

662

(350)

Installation Manual 5

Planning

Ambient and process temperature limits for Super Duplex ELITE meters

140 (60)

Tamb

–40 (–40)

140 (60)

A

B

113
(45)

B

–148 (–100)

–40 (–40) 400 (204)

T

= Ambient temperature °F (°C)

amb

T

= Process temperature °F (°C)

proc

A = All available electronic options

B= Remote mount electronics only

Note

For Super Duplex models operating above 177 °C, please consult the factory before purchase.

Tproc

1.4

Recommendations for hygienic and self­draining applications

CMFS sensors are certified EHEDG TYPE EL CLASS I for hygienic applications when installed
vertically with the process fitting and gasket combinations listed in the Position Paper of
the EHEDG Test Methods Subgroup (available at http://www.ehedg.org). Other process
connections/gasket combinations may be used provided they have been evaluated and
successfully tested for in-place cleanability according to the latest edition of EHEDG
Document 2. Refer to the ELITE Product Data Sheet for further information about fitting
options.

For optimal cleanability and drainability:

• If possible, install the sensor in a vertical pipeline with the process fluid flowing

upward through the sensor.

• If the sensor must be installed in a horizontal pipeline, drainage is accomplished by

air purge evacuation of the pipeline circuit.

• For clean-in-place (CIP) applications, Micro Motion recommends using the

generally-accepted flow velocity of at least 1.5 m/s for cleaning the sensor.

• The gap between the electronics housing and sensor body should be inspected

periodically. Manually clean this gap when necessary.

6 Micro Motion ELITE

Installation for self-draining applicationsFigure 1-1:

A

B

C

A. Process pipeline
B. Direction of normal process flow
C. Direction of drainage

Planning

Installation Manual 7

Mounting

2 Mounting

Topics covered in this chapter:

Recommendations for lifting heavy meters

•

Mount the sensor

•

Rotate junction box or 800 core processor (optional)

•

Mount electronics of high-temperature sensors

•

Mount a CMF010 sensor to a wall or pole

•

Mount a CMFS007, CMFS010 or CMFS015 sensor in a bracket

•

Mount a CMFS025, CMFS040 or CMFS050 sensor in a wall mount bracket

•

Secure wafer-style process connections

•

Attach extended electronics

•

2.1 Recommendations for lifting heavy meters

Heavy meters (those over 50 lb. [22 kg]), and even lighter meters that must be installed in
elevated or difficult-to-reach places, usually require additional consideration when
transporting or lifting them into their installation location.

• Safe handling during transportation and installation is the responsibility of the

installer – know and follow all safety practices and regulations for your facility and
for any lifting/rigging equipment being used

• A professional rigging crew with proper equipment should be used

• Typical equipment for handling heavy meters includes the following:

- Fixed hoist boom trucks or cranes

- Continuous web belt slings

- Eye to eye web belt slings

- Two leg wire rope slings

• Lift a meter by its case.

• Do not lift a meter by its electronics (junction box, transmitter, or any electrical

fittings) or by its purge fittings

• It may be useful to identify the meter center of gravity

• Protect the sealing surfaces on the process fittings with factory-installed flange

protectors or comparable field-installed protection

8 Micro Motion ELITE

A

Mounting

Acceptable lifting pointsFigure 2-1:

Center of gravity for large metersFigure 2-2:

A. Typical center of gravity

Note

Complete and detailed dimensional drawings, including the location of the center of gravity, can be
found through the product drawings link in our online store (www.emerson.com).

Installation Manual 9

Mounting

2.2 Mount the sensor

Use your common practices to minimize torque and bending load on process connections.

Tip

To reduce the risk of condensation problems, do not orient transmitters or sensor junction boxes
with their conduit openings pointing upward.

CAUTION!

Do not lift the sensor by the electronics or purge connections. Lifting the sensor by the
electronics or purge connections can damage the device.

Mounting the sensorFigure 2-3:

Notes

• 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. (Some sensor models installed in very small, flexible pipeline have optional installation
instructions that allow for external supports.)

10 Micro Motion ELITE

2.3 Rotate junction box or 800 core processor (optional)

An integrally mounted junction box or 800 core processor can be rotated to one of eight
possible positions in 45 degree increments.

Parts for rotating the junction box or 800 core processor on the sensorFigure 2-4:

A

B

D

C

E

Mounting

A. Housing
B. Clamping ring
C. Clamping ring screw
D. Feedthrough
E. Alignment notches

Note

The 800 core processor is shown in this figure. The junction box has a somewhat different appearance.

Procedure

1. Loosen the clamping ring screw and remove the clamping ring.

2. Gently separate the housing from the feedthrough, but only until there is sufficient

clearance from the alignment notches to rotate the housing.

3. Rotate the housing to the desired position and in line with the alignment notches.

4. Seat the housing onto the feedthrough.

5. Replace the clamping ring and tighten the clamping ring screw.

Installation Manual 11

B

A

C

D

Mounting

2.4 Mount electronics of high-temperature sensors

The electronics of high-temperature sensors are attached to the end of a 32" (812 mm)
pre-installed flexible conduit. The electronics must be separately mounted on a wall or
instrument pole.

Components of a high-temperature sensorFigure 2-5:

A. Sensor
B. Electronics
C. Mounting bracket
D. Flexible conduit (minimum bend radius 6" [152 mm])

With some large meter sizes, the meter may ship with the electronics attached to the
sensor case. The meter cannot be operated in this configuration. Detach the electronics
bracket from the sensor case and then proceed to mount the electronics to a wall or
instrument pole as described below.

Important

Do not operate the meter while the electronics are attached to the sensor case.

12 Micro Motion ELITE

Removing electronics from the sensor caseFigure 2-6:

A

A. Detach electronics from sensor case and mount to a wall or instrument pole

Mounting

Procedure

• For wall mounting, use four 5/16" or four M8 bolts to secure the mounting bracket.

Installation Manual 13

A

B

C

Mounting

Wall-mount componentsFigure 2-7:

A. Wall or flat surface
B. Electronics (enhanced core processor shown)
C. Flexible conduit

• For mounting to an instrument pole, use a 2-inch U-bolt pipe kit to secure the

mounting bracket.

14 Micro Motion ELITE

A

B

C

Mounting

Pole-mount componentsFigure 2-8:

A. Instrument pole
B. Electronics (enhanced core processor shown)
C. Flexible conduit

Installation Manual 15

A

B

C

Mounting

2.5 Mount a CMF010 sensor to a wall or pole

The CMF010 sensor has an optional mounting configuration for use with small or flexible
pipeline. If the pipeline adequately supports the sensor, you can skip this procedure.

1. Locate the optional mounting holes. For sensors with a junction box, the junction

box must be rotated to the side to expose the mounting holes.

Optional mountingFigure 2-9:

A. Two user-supplied 5/16" (M8) bolts
B. Junction box or core processor (junction box shown)
C. Mounting surface

2. If necessary, install rigid standoffs between the sensor and the mounting surface.

3. Using two user-supplied 5/16" (M8) bolts (minimum length 2 1/4" [58 mm]), secure

the sensor case to the mounting surface.

16 Micro Motion ELITE

2.6 Mount a CMFS007, CMFS010 or CMFS015

A

B

C

sensor in a bracket

The CMFS007, CMFS010 and CMFS015 sensors have an optional mounting bracket for use
with small or flexible pipeline. If the pipeline adequately supports the sensor, this
procedure can be skipped.

1. Secure the mounting bracket to a wall or other flat surface with four user-supplied

5/16" (8 mm) bolts.

2. Place the sensor into the bracket.

3. Secure the sensor in the bracket with the supplied 5/16" (M8) U-bolts.

Mounting bracket for CMFS007, CMFS010, and CMFS015Figure 2-10:

Mounting

A. Mounting bracket
B. Mounting holes
C. Supplied U-bolts

Installation Manual 17

Mounting

2.7 Mount a CMFS025, CMFS040 or CMFS050 sensor in a wall mount bracket

The CMFS025, CMFS040, and CMFS050 sensors have an optional wall mounting bracket.

1. Assemble the bracket.

Figure 2-11:

2. Attach the bracket to the wall using fasteners appropriate for the mounting surface.

3. Place the sensor into the bracket.

4. Secure the sensor in the bracket with the supplied fasteners.

Figure 2-12:

Assembled wall mounting bracket for CMFS025, CMFS040, and
CMFS050

CMFS025, CMFS040, or CMFS050 wall mounted using bracket

18 Micro Motion ELITE

2.8 Secure wafer-style process connections

D

C

B

A

E

A wafer-style connection lets you clamp the sensor into the pipeline. A wafer installation
kit is shipped with a wafer-style sensor.

1. Make sure that the bolts provided are rated for your process connection.

2. Slip the sensor alignment rings over each end of the sensor wafer, then insert the

sensor between the process connections in the pipeline.

Tip

Micro Motion recommends installing gaskets (user-supplied).

Wafer-style connection componentsFigure 2-13:

Mounting

A. Flange nut
B. Gasket (user-supplied)
C. Alignment ring
D. Flange bolt
E. Sensor wafer

3. Insert the flange bolts through both process connections, and thread the flange nuts

onto the bolts.

4. With your fingers, tighten the flange nuts.

5. Rotate the sensor alignment rings in the direction that pushes the bolts outward.

Tip

Rotate both sensor aligment rings until the assembly is centered and tight.

Installation Manual 19

C

B

A

Mounting

Alignment ring usageFigure 2-14:

A. Direction to rotate the alignment ring
B. Direction the flange bolts are pushed
C. Flange bolt

6. With a wrench, tighten the nuts in an alternating order.

2.9 Attach extended electronics

If your installation has a sensor with extended electronics, you will need to install the
extender onto the sensor case.

Note

Extended core processors are matched at the factory to specific sensors. Keep each core processor
together with the sensor with which it was shipped.

CAUTION!

Keep the extender and feedthrough clean and dry. Moisture or debris in the extender or
feedthrough can damage electronics and result in measurement error or flowmeter failure.

Procedure

1. Remove and recycle the plastic cap from the feedthrough on the sensor.

20 Micro Motion ELITE

G

H

E

D

C

A

B

F

Mounting

Feedthrough and extender componentsFigure 2-15:

A. Transmitter or core processor
B. Extender
C. O-ring
D. Feedthrough
E. Clamping ring
F. Clamping screw
G. Plastic plug
H. Plastic cap

2. Loosen the clamping screw and remove the clamping ring. Leave the O-ring in place

on the feedthrough.

3. Remove and recycle the plastic plug from the extender.

4. Fit the extender onto the feedthrough by carefully aligning the notches on the

bottom of the extender with the notches on the feedthrough.

5. Close the clamping ring and tighten the clamping screw to 13–18 in-lbs.

(1,5–2 N-m).

Installation Manual 21

Transmitter power and I/O wiring

3 Transmitter power and I/O wiring

Topics covered in this chapter:

Options for wiring

•

Connect 4-wire cable

•

Connect the 9-wire cable

•

3.1 Options for wiring

The wiring procedure you follow depends on which electronics option you have.

Wiring procedures by electronics optionTable 3-1:

Electronics option Wiring procedure

Integral transmitter The transmitter is already connected to the sensor. No wiring is

required between sensor and transmitter. See the transmitter in­stallation manual for wiring the power and signal cable to the
transmitter.

Extended electronics The electronics are separated from the sensor by an extender

and must be attached as described in Section 2.9. There is no wir­ing required because the physical connection includes the elec­trical connection.

MVD™ Direct Connect

Integral core processor with re­mote transmitter

Remote core processor attach­ed to transmitter

Remote core processor sepa­rate from transmitter – double-

hop

™

There is no transmitter to wire. See the MVD Direct Connect
manual for wiring the power and signal cable between the sensor
and the direct host.

The core processor is already connected to the sensor. Connect a
4-wire cable between the core processor and transmitter. Refer
to Section 3.2.

Connect a 9-wire cable between the sensor and the transmitter/
core processor. Refer to Section 3.3, as well as the Micro Motion
9-Wire Flowmeter Cable Preparation and Installation Guide.

• Connect a 4-wire cable between the core processor and

transmitter. Refer to Section 3.2.

• Connect a 9-wire cable between the sensor and the core pro-

cessor. Refer to Section 3.3, as well as the Micro Motion 9-

Wire Flowmeter Cable Preparation and Installation Guide

CAUTION!

Make sure the hazardous area specified on the sensor approval tag is suitable for the
environment in which the sensor will be installed. Failure to comply with the requirements for
intrinsic safety in a hazardous area could result in an explosion.

22 Micro Motion ELITE

CAUTION!

Fully close and tighten all housing covers and conduit openings. Improperly sealed housings
can expose electronics to moisture, which can cause measurement error or flowmeter failure.
Inspect and grease all gaskets and O-rings.

3.2 Connect 4-wire cable

3.2.1 4-wire cable types and usage

Micro Motion offers two types of 4-wire cable: shielded and armored. Both types contain
shield drain wires.

The cable supplied by Micro Motion consists of one pair of red and black 18 AWG
(0.75 mm2 wires for the VDC connection, and one pair of white and green 22 AWG
(0.35 mm2 wires for the RS-485 connection.

User-supplied cable must meet the following requirements:

• Twisted pair construction.

• Applicable hazardous area requirements, if the core processor is installed in a

hazardous area.

• Wire gauge appropriate for the cable length between the core processor and the

transmitter, or the host.

Transmitter power and I/O wiring

Wire gaugeTable 3-2:

Wire gauge Maximum cable length

VDC 22 AWG (0.35 mm2) 300 ft (90 m)

VDC 20 AWG (0.5 mm2) 500 ft (150 m)

VDC 18 AWG (0.8 mm2) 1000 ft (300 m)

RS-485 22 AWG (0.35 mm2) or larger 1000 ft (300 m)

3.2.2 Prepare a cable with a metal conduit

1. Remove the core processor cover using a flat-blade screw driver.

2. Run the conduit to the sensor.

3. Pull the cable through the conduit.

4. Cut the drain wires and let them float at both ends of the conduit.

Installation Manual 23

Transmitter power and I/O wiring

3.2.3 Prepare a cable with user-supplied cable glands

1. Remove the core processor cover using a flat-blade screw driver.

2. Pass the wires through the gland.

3. Terminate the shield and drain wires inside the gland.

4. Assemble the gland according to vendor instructions.

3.2.4 Prepare a cable with Micro Motion-supplied cable glands

1. Remove the core processor cover using a flat-blade screw driver.

2. Pass the wires through the gland nut and clamping insert.

A. Gland nut
B. Clamping insert

3. Strip the cable jacket.

Option

NPT gland type

M20 gland type

Description

Strip 4-1/2 inch (115 mm)

Strip 4-1/4 inch (108 mm)

4. Remove the clear wrap and filler material.

5. Strip most of the shielding.

Option

NPT gland type

M20 gland type

Description

Strip all but 3/4 inch (19 mm)

Strip all but 1/2 inch (12 mm)

6. Wrap the drain wires twice around the shield and cut off the excess drain wires.

A. Drain wires wrapped around shield

7. For foil (shielded cable) only:

Note

For braided (armored cable) skip this step and contine to the next step.

24 Micro Motion ELITE

Option Description

NPT gland
type

a. Slide the shielded heat shrink over the drain wires. Ensure that the wires

are completely covered.
b. Apply heat (250 °F or 120 °C) to shrink the tubing. Do not burn the cable.
c. Position the clamping insert so the interior end is flush with the braid of the

heat shrink.

A. Shielded heat shrink
B. After heat is applied

Transmitter power and I/O wiring

M20
gland
type

Trim 0.3 in (7 mm).

A. Trim

8. Assemble the gland by folding the shield or braid back over the clamping insert and
1/8 inch (3 mm) past the O-ring.

A. Shield folded back

9. Install the gland body into the conduit opening on the core processor housing.

10. Insert the wires through the gland body and tighten the gland nut onto the gland
body.

A. Shield folded back
B. Gland body

Installation Manual 25

A

B

D

C

AA

Transmitter power and I/O wiring

3.2.5 Connect the wires to the core processor terminals

After the 4-wire cable has been prepared and shielded (if required), connect the individual
wires of the 4-wire cable to the terminals on the core processor.

1. Connect the wires to the core processor terminals.

• If you are connecting to a standard core processor, use the following image and

connections:

A. Terminal 1 (Power supply +): Red wire
B. Terminal 2 (Power supply -): Black wire
C. Terminal 3 (RS-485/A): White wire
D. Terminal 4 (RS-485/B): Green wire

• If you are connecting to an enhanced core processor, use the following image

and connections:

26 Micro Motion ELITE

D

A

B

C

A. Terminal 1 (Power supply +): Red wire
B. Terminal 2 (Power supply -): Black wire
C. Terminal 3 (RS-485/A): White wire
D. Terminal 4 (RS-485/B): Green wire

Transmitter power and I/O wiring

3.3

2. Reinstall the core processor cover.

3. Torque the cover screws to:

• 10–13 lbf-in. (1.13–1.47 N-m) for an aluminum housing

• minimum 19 lbf-in. (2.1 N-m) for a stainless steel housing

If properly seated, there will be no gap between cover and base.

4. Connect the wires to the transmitter terminals using the transmitter installation
manual.

Connect the 9-wire cable

1. Prepare and install the cable according to the instructions in the Micro Motion
Wire Flowmeter Cable Preparation and Installation Guide.

2. Insert the stripped ends of the individual wires into the terminal blocks of the
junction box. Ensure that no bare wires remain exposed.

3. Match the wires color for color. For wiring at the transmitter or remote core
processor, refer to the transmitter documentation.

4. Tighten the screws to hold the wires in place.

5. Ensure integrity of gaskets, then tightly close and seal the junction box cover and all
housing covers.

6. Refer to the transmitter installation manual for signal and power wiring instructions.

9-

Installation Manual 27

Grounding

4 Grounding

The meter must be grounded according to the standards that are applicable at the site.
The customer is responsible for knowing and complying with all applicable standards.

Prerequisites

Micro Motion suggests the following guides for grounding practices:

• In Europe, IEC 79-14 is applicable to most installations, in particular Sections

12.2.2.3 and 12.2.2.4.

• In the U.S.A. and Canada, ISA 12.06.01 Part 1 provides examples with associated

applications and requirements.

If no external standards are applicable, follow these guidelines to ground the sensor:

• Use copper wire, 14 AWG (2,0 mm2 ) or larger wire size.

• Keep all ground leads as short as possible, less than 1 Ω impedance.

• Connect ground leads directly to earth, or follow plant standards.

CAUTION!

Ground the flowmeter to earth, or follow ground network requirements for the facility.
Improper grounding can cause measurement error.

Procedure

Check the joints in the pipeline.

- If the joints in the pipeline are ground-bonded, the sensor is automatically grounded

and no further action is necessary (unless required by local code).

- If the joints in the pipeline are not grounded, connect a ground wire to the grounding

screw located on the sensor electronics.

Tip

The sensor electronics may be a transmitter, core processor, or junction box. The grounding
screw may be internal or external.

28 Micro Motion ELITE

5 Supplementary information

Topics covered in this chapter:

Purge the sensor case

•

Pressure relief

•

5.1 Purge the sensor case

Important

If the sensor has purge fittings, they should remain sealed at all times. The sensor is purged of all
oxygen and sealed at the Micro Motion factory. If the purge plugs are never removed, it is not
necessary to purge or re-seal the sensor. For more information, contact Micro Motion Customer
Service.

If a purge plug is removed from the sensor case, it will be necessary to repurge the case.

Supplementary information

CAUTION!

Take all necessary precautions when removing purge plugs. Removing a purge plug
compromises the secondary containment of the sensor and could expose the user to process
fluid.

CAUTION!

Improper pressurization of the sensor case could result in personal injury. Removing a purge
plug will require the sensor case to be repurged with a dry inert gas. Follow all instructions
provided in the case purging procedure.

WARNING!

Removing the Purge Fitting, Blind Plug, or Rupture Disks compromises the Ex-i Safety
Certification, the Ex-tc Safety Certification, and the IP-rating of the Coriolis meter. Any
modification to the Purge Fitting, Blind Plug, or Rupture Disks must maintain a minimum of
IP66/IP67 Ratings.

Prerequisites

Make sure the following are available before beginning the purge procedure:

• Teflon® tape

• Argon or nitrogen gas sufficient to purge the sensor case

Installation Manual 29

Supplementary information

Procedure

1. Shut down the process, or set control devices for manual operation. Before

2. Remove both purge plugs from the sensor case. If purge lines are being used, open

3. Prepare the purge plugs for reinstallation by wrapping them with 3–5 turns of Teflon

4. Connect the supply of nitrogen or argon gas to the inlet purge connection or open

5. Make sure that there is a tight seal between the inlet connection and sensor case, so

6. Run purge gas through the sensor.

performing the case purging procedure, shut down the process or set the control
devices for manual operation. Performing the purge procedure while the flowmeter
is operating could affect measurement accuracy, resulting in inaccurate flow signals.

the valve in the purge lines.

tape.

inlet purge line. Leave the outlet connection open.

• Exercise caution to avoid introducing dirt, moisture, rust, or other contaminants

into the sensor case.

• If the purge gas is heavier than air (such as argon), locate the inlet lower than the

outlet, so that the purge gas will displace air from bottom to top.

• If the purge gas is lighter than air (such as nitrogen), locate the inlet higher than

the outlet, so that the purge gas will displace air from top to bottom.

that air cannot be drawn by suction into the case or purge line during the purging
process.

The purge time is the amount of time required for full exchange of atmosphere to
inert gas. The larger the line size, the greater amount of time is required to purge
the case. If purge lines are being used, increase the purge time to fill the additional
volume of the purge line.

Note

Keep the purge gas pressure below 30 psig (2 bar).

Purge timeTable 5-1:

Sensor model Purge rate, in ft3/hr (l/h) Time, in minutes

CMF010 20 (566) 1

CMF025 20 (566) 1

CMF050 20 (566) 2

CMF100 20 (566) 5

CMF200 20 (566) 12

CMF300 20 (566) 30

CMF350 20 (566) 45

CMF400 20 (566) 55

CMFHC2 20 (566) 100

CMFHC3 20 (566) 170

30 Micro Motion ELITE

Supplementary information

Purge time (continued)Table 5-1:

Sensor model Purge rate, in ft3/hr (l/h) Time, in minutes

CMFHC4 20 (566) 268

CMFS007 20 (566) 1 1/2

CMFS010 20 (566) 1 1/2

CMFS015 20 (566) 1 1/2

CMFS025 20 (566) 4 1/2

CMFS040 20 (566) 4 1/2

CMFS050 20 (566) 4 1/2

CMFS075 20 (566) 6

CMFS100 20 (566) 6

CMFS150 20 (566) 6

7. At the appropriate time, shut off the gas supply, then immediately seal the purge
outlet and inlet connections with the purge plugs.

Note

Avoid pressurizing the sensor case. If pressure inside the case elevates above atmospheric
pressure during operation, the flowmeter density calibration will be inaccurate.

8. Make sure that the purge fitting seals are tight so that air cannot be drawn by
suction into the sensor case.

Installation Manual 31

Supplementary information

5.2 Pressure relief

ELITE sensors are available with a rupture disk installed on the case. Rupture disks are
meant to vent process fluid from the sensor case in the unlikely event of a flow tube
breach. Some users connect a pipeline to the rupture disk to help contain escaping process
fluid. For more information about rupture disks, contact Micro Motion Customer Service.

If the sensor has a rupture disk, it should remain installed at all times as it would otherwise
be necessary to re-purge the case. If the rupture disk is activated by a tube breach, the seal
in the rupture disk will be broken, and the Coriolis meter should be removed from service.

The rupture disk is located as follows on the meter, and the warning sticker shown is
placed next to it.

The sensor must be oriented so that personnel and equipment will not be exposed to any
discharge along the pressure relief path.

CAUTION!

Stay clear of the rupture disk pressure relief area. High-pressure fluid escaping from the sensor
can cause severe injury or death.

32 Micro Motion ELITE

Supplementary information

Installation Manual 33

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