Emerson CMF200A User Manual

Installation Manual

P/N 20002158, Rev. C
September 2007

Micro Motion

®

ELITE® Sensors

Installation Manual

©2007, Micro Motion, Inc. All rights reserved. ELITE and ProLink are registered trademarks, and MVD and MVD Direct Connect
are trademarks of Micro Motion, Inc., Boulder, Colorado. Micro Motion is a registered trade name of Micro Motion, Inc., Boulder,
Colorado. The Micro Motion and Emerson logos are trademarks and service marks of Emerson Electric Co. All other trademarks
are property of their respective owners.

Before You Begin

Before You Begin

This manual describes how to install a Micro Motion® ELITE® sensor. The following information is provided
in this manual:

Customer service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1

Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

European installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

Installation options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

Installation steps

Determining a Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6

Orienting the Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 10

Mounting the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 11

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 16

Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 20

Additional information

Pressure Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 20

Purge Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 21

Rupture Disks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 22

Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 23

Customer service

For technical assistance, phone the Micro Motion Customer Service department:

• In the U.S.A., phone 800-522-MASS (800-522-6277) (toll free)

• In Canada and Latin America, phone [phone] (U.S.A.)

•In Asia:

- In Japan, phone [phone]

- In other locations, phone [phone] (Singapore)

•In Europe:

- In the U.K., phone [phone] (toll-free)

- In other locations, phone [phone] (The Netherlands)

Customers outside the U.S.A. can also email Micro Motion customer service at
[e-mail].

Troubleshooting

Refer to the transmitter manual for troubleshooting help.

Installation Manual 1

Before You Begin

Specifications

Full product specifications can be found in the product data sheet, which is available from the Micro Motion
web site at www.micromotion.com.

Definitions

The term MVD

™

transmitter refers to the following transmitter models:

• Models 1500, 1700, 2400S, 2500, and 2700

• Models 3500 and 3700

The term high-temperature ELITE sensor refers to the following model codes:

• CMF200A, CMF300A, CMF400A, and CMFHC3A

• CMF200B and CMF300B

The term extreme high-temperature ELITE sensor refers to the following model codes:

• CMF200C, CMF300C, CMF400C, and CMFHC3C

• CMF200E and CMF300E

European installations

This Micro Motion product complies with all applicable European directives when properly installed in
accordance with the instructions in this manual. Refer to the EC declaration of conformity for directives that
apply to this product.

The EC declaration of conformity, with all applicable European directives, and the complete ATEX
Installation Drawings and Instructions are available on the internet at www.micromotion.com/atex 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.micromotion.com/documentation.

Installation options

The ELITE sensor makes up one part of a Coriolis flowmeter. The other part is a transmitter. ELITE sensors
are available with the following electronics interfaces:

• An integral Model 2400S transmitter or enhanced core processor (see Figure 1).

• An integral core processor for connecting to a 4-wire remotely mounted transmitter or to a
user-supplied remote host (see Figure 2).

• A 9-wire junction box for connecting to a remotely mounted transmitter or a remotely mounted core
processor (see Figure 3).

• High-temperature and extreme high-temperature models are equipped with a flexible conduit, on
which can be mounted a Model 2400S transmitter, a Model 1700/2700 transmitter, a core processor, or
a junction box (see Figure 4).

2 Micro Motion® ELITE® Sensors

Figure 1 ELITE sensor with Model 2400S transmitter or enhanced core processor

Flow direction

arrow

Purge fittings or rupture

disks (optional)

Calibration tag

Thru holes for
alternative
mounting

Process
connection

CMF010

Approval tag

Model 2400S transmitter or
enhanced core processor

Model 2400S transmitter or
enhanced core processor

CMF025, CMF050, or CMF100

Purge

connections

(optional)

Calibration tag

Approval tag

Process connection

Flow direction

arrow

CMF200, CMF300, CMF400, or CMFHC3

Approval tag

Model 2400S transmitter or

enhanced core processor

Flow direction

arrow

Purge connections
(optional)

Calibration tag

Process connection

Before You Begin

Installation Manual 3

Before You Begin

Flow direction

arrow

Purge fittings or rupture

disks (optional)

Calibration tag

Core processor housing

Thru holes for
alternative
mounting

Process connection

CMF010

CMF025, CMF050, or CMF100

Purge

connections

(optional)

CMF200, CMF300, CMF400, or CMFHC3

Calibration tag

Approval tag

Process connection

Flow direction

arrow

Approval tag

Core

processor

housing

Flow direction
arrow

Purge connections
(optional)

Calibration tag

Core processor
housing

Process connection

Approval tag

Figure 2 ELITE sensor with core processor

4 Micro Motion® ELITE® Sensors

Flow direction

arrow

Purge connections or

rupture disks

(optional)

Calibration tag

Junction box

Approval tag

Thru holes for
alternative
mounting

Process connection

Junction box

Approval tag

CMF025, CMF050, or CMF100

Flow direction arrow

Process connection

Purge connections

(optional)

CMF200, CMF300, or CMF400

Junction box

Calibration tag

Approval tag

Process connection

Purge connections
(optional)

CMF010

Flow direction

arrow

Calibration tag

Before You Begin

Figure 3 ELITE sensor with junction box

Installation Manual 5

Determining a Location

Purge connections
(optional)

Calibration tag

Approval tag

Process connection

Flow direction

arrow

Flexible conduit

Transmitter, core processor,

or junction box

(Model 2400S transmitter

shown)

CMF200A, B, C, or E
CMF300A, B, C, or E
CMF400A or C
CMFHC3A or CMFHC3C

Figure 4 High-temperature or extreme high-temperature ELITE sensor

Step 1 Determining a Location

Choose a location for the sensor based on the requirements described in this section. The following general
guidelines can help you select an appropriate location for the sensor.

Full flow tubes

For optimal performance, the sensor tubes should remain full of process fluid.

Hazardous area installations

Make sure the hazardous area specified on the sensor approval tag is suitable for the environment in which the
sensor is installed. (See Figures 1–4.) For installation in an area that requires intrinsic safety, refer to the
appropriate Micro Motion approval documentation, shipped with the sensor or available from the
Micro Motion web site at www.micromotion.com.

Improper installation in a hazardous area can cause an explosion. When installing in a hazardous area,
refer to Micro Motion approvals instructions, shipped with the product or available from the
Micro Motion web site. For hazardous installations in Europe, refer to standard EN 60079-14 if national
standards do not apply.

Environmental limits

The ambient and process temperature limits of the sensor are shown in Figures 5 and 6:

• For ELITE sensor models other than high-temperature and extreme-high temperature models, see
Figure 5.

• For high-temperature and extreme high-temperature ELITE sensors, see Figure 6.

6 Micro Motion® ELITE® Sensors

Determining a Location

Ambient temperature of core processor or transmitter in °F (°C)

Maximum process temperature in °F (°C)

Mount transmitter remotely; use junction box

–148 (–100)

–112 (–80)

–76 (–60)

–40 (–40)

–4 (–20)

32 (0)

68 (20)

104 (40)

140 (60)

176 (80)

–400 (–240)

–292 (–180)

–184 (–120)

–76 (–60)

32 (0)

140 (60)

356 (180)

464 (240)

248 (120)

400 (204)

113 (45)

Mount transmitter remotely; use junction box

Notes:

1. When ambient temperature is below –40 °F (–40 °C), a core processor or Model 2400S transmitter must be heated to bring
its local ambient temperature to between –40 °F (–40 °C) and +140 °F (+60 °C). Long-term storage of electronics at
ambient temperatures below –40 °F (–40 °C) is not recommended.

2. Temperature limits may be further restricted by hazardous area approvals.

3. The extended mount option allows the sensor case to be insulated without covering the transmitter, core processor, or
junction box, but does not affect temperature ratings.

4. For the purposes of selecting electronics options, this graph should be used only as a general guide. If your process
conditions are close to the gray areas, it may be inappropriate to use electronics options other than a junction box. Consult
with your Micro Motion representative.

140
(60)

Figure 5 ELITE sensor ambient and process temperature limits (all models except

high-temperature and extreme high-temperature models)

Installation Manual 7

Determining a Location

–148 (–100)

–112 (–80)

–76 (–60)

–40 (–40)

–4 (–20)

32 (0)

68 (20)

104 (40)

140 (60)

176 (80)

–58 (–50)

32 (0)

392 (200)

752 (400)

842 (450)

662 (350)

800 (427)

Mount transmitter remotely; use junction box

Notes:

1. When ambient temperature is below –40 °F (–40 °C), a core processor or Model 2400S transmitter must be heated to bring
its local ambient temperature to between –40 °F (–40 °C) and +140 °F (+60 °C). Long-term storage of electronics at
ambient temperatures below –40 °F (–40 °C) is not recommended.

2. Temperature limits may be further restricted by hazardous area approvals.

662

(350)

302 (150)

122 (50)

High-temp. models

Extreme high-temp. models

482 (250)

572 (300)

212 (100)

Ambient temperature of core processor or transmitter in °F (°C)

Maximum process temperature in °F (°C)

Figure 6 High-temperature and extreme high-temperature ELITE sensor ambient and

process temperature limits

Hazardous area approvals may impose additional limits on ambient and process temperature. For the ATEX
“T” rating, refer to the ATEX documentation shipped with the sensor or available on the Micro Motion web
site at www.micromotion.com. IECEx and NEPSI approvals also use the ATEX “T” rating. UL and CSA
ambient temperature limits are listed in Table 1.

Table 1 UL and CSA ambient temperature limits

Sensor models Electronics °F °C

UL All models Junction box +104 maximum +40 maximum

CSA All models Junction box +140 maximum +60 maximum

All models except CMF400 2400S transmitter –40 to +140 –40 to +60

CMF400 2400S transmitter –58 to +140 –50 to +60

Core processor –40 to +104 –40 to +40

Core processor –40 to +140 –40 to +60

8 Micro Motion® ELITE® Sensors

Determining a Location

Maximum wiring distances

If the transmitter is mounted remotely from the sensor, the maximum distance between the sensor and
transmitter depends on cable type. See Table 2.

For high-temperature and extreme high-temperature ELITE sensors, note the following:

• For sensors with a Model 1700/2700 or a Model 2400S transmitter, the transmitter is considered to be
integrally mounted on the sensor, so Table 2 does not apply.

• For sensors with a junction box or core processor, the limits in Table 2 apply only to the wiring
between the junction box or core processor and a remotely-mounted transmitter. The length of the
flexible conduit on which the junction box or core processor is mounted does not need to be
considered.

Table 2 Maximum cable lengths

Cable type Wire size Maximum length

Micro Motion 9-wire to an MVD
transmitter or core processor

Micro Motion 9-wire to all other
transmitters

Micro Motion 4-wire Not applicable 1000 feet (300 meters)

User-supplied 4-wire

Power wires (VDC) 22 AWG (0,35 mm

Signal wires (RS-485) 22 AWG (0,35 mm

Not applicable 60 feet (20 meters)

Not applicable 1000 feet (300 meters)

2

) 300 feet (90 meters)

2

20 AWG (0,5 mm

18 AWG (0,8 mm

) 500 feet (150 meters)

2

) 1000 feet (300 meters)

2

) or larger 1000 feet (300 meters)

Pipe run

Micro Motion sensors do not require a straight run of pipe upstream or downstream.

Valves

Meter zero can be adjusted for special circumstances. When zeroing is performed with the auto-zero feature of
the transmitter, it is necessary to halt flow through the sensor, with the sensor tubes full of process fluid at
typical process conditions. The valve used to halt flow in this situation should be downstream from the sensor.
It is also possible to restore the meter’s factory zero setting. For more information about zeroing, refer to the
instruction manual shipped with the transmitter.

Installation Manual 9

Orienting the Sensor

Step 2 Orienting the Sensor

The sensor will function properly in any orientation if the sensor tubes remain filled with process fluid.
Micro Motion recommends orienting ELITE sensors as shown in Table 3.

Table 3 Recommended sensor orientations

Sensor model Application Recommended orientation

CMF010 All applications Tubes flat

Horizontal pipeline

CMF025, CMF050,
and CMF100

CMF200, CMF300,
CMF400, and
CMFHC3

Liquids Tubes down

Horizontal pipeline

Gases and slurries Tubes up

Horizontal pipeline

Liquids Tubes down

Horizontal pipeline

Gases Tubes up

Horizontal pipeline

Slurries Flag mount

Vertical pipeline

Flow direction arrow

The sensor has a flow direction arrow (see Figures 1–4) to help you configure the transmitter for flow
direction. If possible, install the sensor so that the flow direction arrow matches actual process flow.

Vertical pipeline

If the sensor is installed in a vertical pipeline, liquids and slurries should flow upward through the sensor.
Gases may flow upward or downward.

10 Micro Motion® ELITE® Sensors

Mounting the Sensor

If the pipeline will not support
the sensor, mount the sensor
using bolts as illustrated.

2 × user supplied bolts

•5/16″ (M8) maximum diameter

•2 1/4″ (58 mm) minimum length

Junction box or core processor (junction box
shown)

• Junction box can be rotated by hand
(before wiring is attached) for access to
mounting holes

• Core processor does not need to be
rotated for access to mounting holes

If necessary, rigid standoffs (e.g., steel washers)
can be installed

Mounting surface — if pipe supports are used, they
should be rigidly supported by the same mounting
surface that supports the sensor

Step 3 Mounting the Sensor

Use your common practices to minimize torque and bending load on process connections. Figure 7 illustrates
how to mount the sensor. To reduce the risk of condensation or excessive moisture, the conduit opening
should not point upward (if possible). The conduit opening of the junction box or core processor can be
rotated freely to facilitate wiring.

The CMF010 sensor has an optional mounting configuration (Figure 8) for use with small or soft pipeline.

Figure 7 Mounting an ELITE sensor

Figure 8 Optional mounting for CMF010 sensors

Installation Manual 11

Mounting the Sensor

Plastic cap — remove and
discard

Feedthrough

Clamping ring — remove

but do not discard

Clamping ring screw

Installing extended mount electronics

If you ordered a sensor with an extended mount for the electronics, you will need to install the extender. To
install the extended mount electronics:

1. There is a metal clamping ring around the base of the feedthrough (Figure 9). Remove this ring and set
it aside. You will use it later to secure the extender to the sensor.

2. The sensor was shipped with a plastic cap over the feedthrough pins. Remove the plastic cap and
discard it.

3. There is a plastic plug inside the extended mount (Figure 10). Remove the plug and discard it.

4. Place the extended mount onto the feedthrough and carefully rotate the extender until the feedthrough
notches line up. Being careful not to damage the feedthrough pins, push the extender down onto the
feedthrough until it is fully engaged.

5. Replace the clamping ring on the feedthrough. Tighten the ring’s screw to 13–18 in-lbs (1.5–2 N-m).

Figure 9 Feedthrough, plastic cap, and clamping ring

12 Micro Motion® ELITE® Sensors

Figure 10 Mounting the temperature extender onto the sensor

Extended mount — carefully align the notches at
the bottom of the extended mount with the
notches on the feedthrough to engage properly

Plastic plug — remove and
discard

Feedthrough — note the

notches for correct

engagement of the extender

Clamping ring screw —

when extender is engaged,

tighten this to 13–18 in-lbs

(1.5–2 N-m)

Model 2400S transmitter or enhanced core
processor — preinstalled on the extended
mount

Mounting the Sensor

Mounting the electronics of high-temperature and extreme high-temperature sensors

High-temperature and extreme high-temperature ELITE sensors come with a 32″ (812 mm) pre-installed
flexible conduit. This conduit is required for agency approval.

A factory-supplied Model 2400S transmitter, Model 1700/2700 transmitter, core processor, or junction box is
connected to the end of the flexible conduit. Mount the electronics to a wall or instrument pole using the
supplied bracket (Figure 11).

Installation Manual 13

Mounting the Sensor

Use 4 × 5/16″ (8 mm)

bolts to secure the

bracket to a wall

Mounting

bracket

Use 2 user-supplied
5/16″ (8 mm) U-bolts
to secure the bracket

to an instrument pole

Flexible
conduit

Mounting

bracket

Flexible
conduit

Transmitter, core processor, or
junction box (Model 2400S shown)

Figure 11 Electronics mounting for high-temperature and extreme high-temperature

ELITE sensors

Installing wafer-style sensors

A wafer-style sensor, which has no flanges or fittings, lets you “clamp” the sensor between process
connections in the pipeline. Model CMF025, CMF050, and CMF100 sensors are available in the wafer style.

A wafer installation kit is shipped with a wafer-style sensor. A wafer kit contains the following pieces:

• 4 flange bolts

• 8 flange nuts

• 2 alignment rings, which help center the sensor between the bolts

To install a wafer-type sensor, refer to Figures 12 and 13 and follow the steps below:

1. Make sure the bolts provided in the wafer installation kit 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 (Figure 12). Installing gaskets is recommended. (Micro Motion
does not supply gaskets.)

3. Insert the bolts through both process connections, and thread the nuts onto the bolts. Tighten nuts as
tight as you can with your fingers.

4. Rotate the sensor alignment rings in the direction that pushes the bolts outward (Figure 13). Rotate
both rings until the assembly is centered and tight.

5. With a wrench, tighten nuts in an alternating order, to ensure the process connections are evenly
tightened.

14 Micro Motion® ELITE® Sensors

Figure 12 Wafer-style assembly

Process connection

Sensor wafer

Flange bolt

Alignment ring

Gasket (user-supplied)

Flange nut

Rotate the ring...

...to push the bolts outward

Sensor wafer

Sensor alignment ring

Flange bolt

Mounting the Sensor

Figure 13 Tightening the sensor alignment rings

Installation Manual 15

Wiring

Step 4 Wiring

Hazardous area installations

If you are installing the sensor in a hazardous location, verify that the hazardous classification information
printed on the sensor tag matches the environment in which the sensor will be installed.

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

Installation options

The sensor has one of the following configurations:

• An integral Model 2400S (all models) or Model 1700/2700 transmitter (high-temperature and extreme
high-temperature models only). No wiring is required between the sensor and the transmitter. Skip to
Grounding on page 20.

• A core processor to a 4-wire remote transmitter (requires 4-wire cable); see Core processor to a 4-wire
remote transmitter on page 16.

• A core processor to a remote host (requires 4-wire cable); refer to the Micro Motion MVD

Connect

™

Meters Installation Manual.

™

Direct

• A junction box to a 9-wire remote transmitter or remote core processor (requires 9-wire cable); see
Junction box to a 9-wire remote transmitter or remote core processor on page 19.

Core processor to a 4-wire remote transmitter

Follow the steps below to connect the 4-wire cable between the core processor and the transmitter.

1. Use one of the following methods to shield the wiring from the core processor to the transmitter:

• If you are installing unshielded wiring in continuous metallic conduit that provides 360°
termination shielding for the enclosed wiring, go to page 18 (step 6 of the wiring procedure).

• If you are installing a user-supplied cable gland with shielded cable or armored cable, terminate
the shields in the cable gland. Terminate both the armored braid and the shield drain wires in the
cable gland. Never connect the drain wires to the internal ground screw of the core processor. Go
to page 18 (step 6 of the wiring procedure).

• If you are installing a Micro Motion-supplied cable gland at the core processor housing:

- Prepare the cable and apply shielded heat shrink as described below. The shielded heat shrink
provides a shield termination suitable for use in the gland when using cable whose shield
consists of foil and not a braid. Proceed to step 2 of the wiring procedure, below.

- With armored cable, where the shield consists of braid, prepare the cable as described below,
but do not apply heat shrink. Proceed to step 2 of the wiring procedure, below.

2. Remove the cover from the core processor housing.

3. Slide the gland nut and the clamping insert over the cable.

16 Micro Motion® ELITE® Sensors

Wiring

4 1/2 in

(114 mm)

3/4 in

(19 mm)

7/8 in

(22 mm)

7/8 in

(22 mm)

Shielded heat shrink

Gland body

Gland nut

Gland clamping

insert

Figure 14 Micro Motion cable gland and heat shrink

4. For connection at the core processor housing, prepare shielded cable as follows (for armored cable,
omit steps d, e, f, and g):

a. Strip 4 1/2 inches (114 mm) of cable jacket.

b. Remove the clear wrap that is inside the cable jacket, and remove the filler material between the

wires.

c. Remove the foil shield that is around the insulated wires, leaving 3/4 inch (19 mm) of foil or braid

and drain wires exposed, and separate the wires.

d. Wrap the shield drain wire(s) around the exposed foil twice. Cut off the excess wire.

Figure 15 Wrapping the shield drain wires

e. Place the shielded heat shrink over the exposed shield drain wire(s). The tubing should completely

cover the drain wires.

f. Without burning the cable, apply heat (250 °F or 120 °C) to shrink the tubing.

Installation Manual 17

Wiring

Figure 16 Applying the heat shrink

g. Position gland clamping insert so the interior end is flush with the heat shrink.

h. Fold the cloth shield or braid and drain wires over the clamping insert and approximately 1/8 inch

(3 mm) past the O-ring.

Figure 17 Folding the cloth shield

i. Install the gland body into the core processor housing conduit opening.

Figure 18 Gland body and core processor housing

5. Insert the wires through the gland body and assemble the gland by tightening the gland nut. If desired,
leave sufficient wire length inside the core processor housing to allow the housing to rotate without
damaging the wires.

6. Identify the wires in the 4-wire cable. The 4-wire cable supplied by Micro Motion consists of one pair
of 18 AWG (0,80 mm
pair of 22 AWG (0,35 mm

2

) wires (red and black), which should be used for the VDC connection, and one

2

) wire (green and white), which should be used for the RS-485 connection.

Connect the four wires to the numbered slots on the core processor (Figure 19).

18 Micro Motion® ELITE® Sensors

Figure 19 Connecting the wires at the core processor

Core processor housing internal ground screw

• For connections to earth ground (if core processor cannot be
grounded via sensor piping and local codes require ground
connections to be made internally)

• Do not connect shield drain wires to this terminal

Terminal 1

Power supply +

(Red wire)

Terminal 2

Power supply –

(Black wire)

Terminal 3

RS-485/A

(White wire)

Terminal 4

RS-485/B

(Green wire)

Standard core processorEnhanced core processor

Terminal 1

Power supply +

(Red wire)

Terminal 2

Power supply –

(Black wire)

Terminal 3

RS-485/A
(White wire)

Terminal 4

RS-485/B
(Green wire)

Wiring

7. Reinstall and tighten the core processor housing cover.

8. Additional wiring instructions for the transmitter can be found in the transmitter manual.

Note: Never ground the 4-wire cable shield and shield drain wire(s) at the transmitter.

Junction box to a 9-wire remote transmitter or remote core processor

Follow the steps below to connect the 9-wire cable between the sensor and the transmitter or core processor.

1. Prepare and install the cable according to the instructions in Micro Motion’s 9-Wire Flowmeter Cable
Preparation and Installation Guide.

2. Insert the stripped ends of the individual wires into the terminal blocks. No bare wires should 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 on
the transmitter or core processor.

Installation Manual 19

Grounding

Step 5 Grounding

The sensor can be grounded via the piping if the joints in the pipeline are ground-bonded. If the sensor is not
grounded via the piping, connect a ground wire to the internal or external grounding screw, which is located
on the transmitter, core processor, or junction box.

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

If national standards are not in effect, follow these guidelines to ground the sensor:

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

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

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

Pressure Ratings

Table 4 shows the pressure ratings for ELITE sensors.

Table 4 ELITE pressure ratings

EN-1092 flange Pressure rating (bar)

≤

PN Type Facing Description ASTM

material

40 11

weld
neck

40 11

weld
neck

100 11

weld
neck

40 32/02

lap

joint

1. Pressure rating limited by flange (for 304 sensor tubes).

2. Pressure rating limited by flange (for 316 sensor tubes).

3. Pressure rating limited by flange (for C-22 Alloy sensor tubes).

B1 Flange, EN

1092-1 PN40

Form B1 (304)

B2 & D Flange, EN

1092-1 PN40
Form B2 & D

(316)

B2 & D Flange, EN

1092-1 PN100

Form B2 & D

(316)

B1 Flange, EN

1092-1 PN40

Form B1(lap

joint)

304

316

316

C-22 collar/

304 flange

50°C 100°C 150°C 200°C 250°C 300°C 350°C 400°C 427°C

40.0 34.4 30.8 28.0 26.0 24.1 23.0 22.0 21.4 1

40.0 40.0 36.3 33.7 31.8 29.7 28.5 27.4 26.9 2

100.0 100.0 90.9 84.2 79.5 74.2 71.4 68.5 67.3 2

40.0 34.4 30.8 28.0 26.0 24.1 23.0 22.0 21.4 3

Note

20 Micro Motion® ELITE® Sensors

Purge Fittings

Purge Fittings

If the sensor has purge fittings, they should remain sealed at all times. After a purge plug has been removed,
the sensor case should be purged with argon or nitrogen and resealed.

Purging the case protects internal components. The sensor is purged of all oxygen and sealed at the 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.

Removing a purge plug

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

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

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.

Case purging procedure

Read all instructions before performing the case purging procedure. It is not necessary to perform this
procedure unless a purge plug has been removed.

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

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

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

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

®

tape.

4. Connect the supply of nitrogen or argon gas to the inlet purge connection or open 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 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 the
purge gas will displace air from top to bottom.

5. Make sure there is a tight seal between the inlet connection and sensor case, so air cannot be drawn by
suction into the case or purge line during the purging process.

6. The purge time is the amount of time required for full exchange of atmosphere to inert gas. For each
sensor size, the purge time is different. Refer to Table 5. If purge lines are being used, increase the
purge time to fill the additional volume of the purge line.

7. Avoid pressurizing the sensor case. At the appropriate time, shut off the gas supply, then immediately
seal the purge outlet and inlet connections with the purge plugs. If pressure inside the case elevates
above atmospheric pressure during operation, the flowmeter density calibration will be inaccurate.

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

Installation Manual 21

Rupture Disks

Table 5 Time required to purge ELITE sensor cases

Sensor model

CMF010 20 (566) 1

CMF025 20 (566) 1

CMF050 20 (566) 2

CMF100 20 (566) 5

CMF200 20 (566) 12

CMF300 20 (566) 30

CMF400 20 (566) 55

(1) If purge lines are being used, increase purge time to fill the additional volume.

Purge rate

ft3/hr (l/hr)

(1)

Time

minutes

Rupture Disks

If the sensor has rupture disks, they are installed in the sensor purge fitting openings. The rupture disks should
remain installed at all times. If you remove a rupture disk from the sensor case, it will be necessary to re-purge
the case (see Case purging procedure on page 21).

Rupture disks are meant to vent process fluid from the sensor case in the event of a flow tube rupture. Some
users connect a pipeline to the rupture disk to help contain escaping process fluid.

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

If a rupture disk is removed, the instructions for repurging the case provided under Case purging
procedure on page 21 must be followed. Improperly pressurizing the sensor case can result in serious
injury.

For more information about rupture disks, contact Micro Motion Customer Service.

22 Micro Motion® ELITE® Sensors

Return Policy

Return Policy

Micro Motion procedures must be followed when returning equipment. These procedures ensure legal
compliance with government transportation agencies and help provide a safe working environment for Micro
Motion employees. Failure to follow Micro Motion procedures will result in your equipment being refused
delivery.

Information on return procedures and forms is available on our web support system at
www.micromotion.com, or by phoning the Micro Motion Customer Service department (see page 1).

New and unused equipment

Only equipment that has not been removed from the original shipping package will be considered new and
unused. New and unused equipment requires a completed Return Materials Authorization form.

Used equipment

All equipment that is not classified as new and unused is considered used. This equipment must be completely
decontaminated and cleaned before being returned.

Used equipment must be accompanied by a completed Return Materials Authorization form and a
Decontamination Statement for all process fluids that have been in contact with the equipment. If a
Decontamination Statement cannot be completed (e.g., for food-grade process fluids), you must include a
statement certifying decontamination and documenting all foreign substances that have come in contact with
the equipment.

Installation Manual 23

© 2007 Micro Motion, Inc. All rights reserved. P/N 20002158, Rev. C

*20002158*

For the latest Micro Motion product specifications, view the
PRODUCTS section of our web site at www.micromotion.com

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