Micro Motion Model D and DT Installation Manual

Installation and Operation Manual

P/N 1005172, Rev. C
August 2008

Micro Motion

®

Model D and DT Sensors

Instruction Manual

©2008, 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.

Contents

Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Your new sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

The installation process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Additional information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Step 2. Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Pipe run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Maximum wiring distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

DT sensor junction box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Hazardous area installations . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Step 3. Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Flow direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Process fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Step 4. Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Conduit openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Optional Model D600 mounting . . . . . . . . . . . . . . . . . . . . . . . . . 18

DT sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Step 5. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Hazardous area installations . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Model D sensor junction box . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Model DT sensor cable and junction box . . . . . . . . . . . . . . . . . . 20

Connecting and shielding 9-wire cable. . . . . . . . . . . . . . . . . . . . 21

D600 sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Power supply wiring to the remote booster amplifier . . . . . . . . . 26

Power supply wiring to the integral booster amplifier . . . . . . . . . 27

Wiring from the remote booster amplifier to the sensor . . . . . . . 28

Wiring to a transmitter (D600 sensor with junction box) . . . . . . . 29

Core processor to a 4-wire remote transmitter or remote host. . 32

Sensor grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Step 6. Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Zeroing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Configuration, calibration, and characterization . . . . . . . . . . . . . 39

Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Micro Motion® Model D and DT Sensors Instruction Manual iii

Contents continued

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Zero drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Erratic flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Inaccurate flow rate or batch total . . . . . . . . . . . . . . . . . . . . . . . . 44

Inaccurate density reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Inaccurate temperature reading . . . . . . . . . . . . . . . . . . . . . . . . . 46

Troubleshooting at the transmitter . . . . . . . . . . . . . . . . . . . . . . . 46

Troubleshooting at the sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Appendix A Purge Fittings . . . . . . . . . . . . . . . . . . . . . . 55

Appendix B Rupture Disk

. . . . . . . . . . . . . . . . . . . . . . . 59

Appendix C Label Maintenance and

Replacement

Appendix D Return Policy

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

. . . . . . . . . . . . . . . . . . . . . . 65

iv Micro Motion® Model D and DT Sensors Instruction Manual

Before You Begin

Your new sensor

Your new Micro Motion® Model D or DT sensor, or D600 sensor and
booster amplifier, is one part of a Coriolis flowmetering system. The
other part is a transmitter.

Transmitter connections

Model D sensors are available with a factory-supplied 9-wire junction
box for connecting to a remotely mounted transmitter, or to a remotely
mounted core processor.

Model DT sensors are available with a 3-foot (1-meter) pigtail of cable
that connects to a user-supplied junction box. The junction box connects
to a remotely mounted transmitter, or to a remotely mounted core
processor.

The D600 has a booster amplifier. The booster amplifier is available with
a factory-supplied 9-wire junction box for connecting to a remotely
mounted transmitter, or with a factory-supplied core processor for
connecting to a 4-wire remotely mounted transmitter or to a user­supplied remote host.

All Model D and DT sensors may be connected to the Micro Motion
transmitters listed in Table 1. The D600 sensor may be connected to the
transmitters listed in Table 2.

Table 1. Transmitter and sensor compatibility guide

Transmitter

Model 1700/2700 (9-wire) X X
Model 3500/3700 (9-wire) X X
RFT9739 (7- or 9-wire) X X
IFT9701 (9-wire) X
RFT9712 (7- or 9-wire) X X

(1)Except D600.

(factory-supplied junction box)

Model D sensor

(1)

Model DT sensor

(user-supplied junction box)

Micro Motion® Model D and DT Sensors Instruction Manual 1

Before You Begin continued

The D600 sensor and booster amplifier are available in any of the
configurations described in Table 2. Table 2 also lists the transmitters
that can be used with each configuration.

Table 2. D600 configurations and compatible transmitters

D600 sensor configuration

Booster amplifier location

Integral to sensor Junction box 9-wire • Model 1700/2700 (with integral core

Remote from sensor Junction box 9-wire • Model 1700/2700 (with integral core

(1)A direct host is a user-supplied remote controller, PLC, or other device.

Booster amplifier wiring
component

Core processor 4-wire • Model 1700/2700

Core processor 4-wire • Model 1700/2700

Connection to
transmitter Compatible transmitters

processor)

• Model 3500/3700 (9-wire)

• RFT9739

• RFT9712

• Remote core processor

• Model 3500/3700 (MVD)

• Model 2500

• Direct host

processor)

• Model 3500/3700 (9-wire)

• RFT9739

• RFT9712

• Remote core processor

• Model 3500/3700 (MVD)

• Model 2500

• Direct host

(1)

(1)

European installations

This Micro Motion product complies with all applicable European
directives when properly installed in accordance with the instructions in
this quick reference guide. 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/library.

Sensor components

Components of the sensor are illustrated on pages 3-6.

2 Micro Motion® Model D and DT Sensors Instruction Manual

Before You Begin continued

Ground screw

Purge connections

(optional)

Junction box

Sensor housing

Flow direction
arrow

Process
connection

Calibration tag

Approvals tag

Flow direction
arrow

Purge connection

(optional)

Calibration tag

Sensor
housing

Junction box

Process
connection

Approvals

tag

Ground screw

Purge connection
(optional)

DS025, DH025, DH038, and DS040 sensors

DS065, DS100, DH100, DS150, DH150, DS300, and DH300 sensors

Micro Motion® Model D and DT Sensors Instruction Manual 3

Before You Begin continued

Sensor housing

Booster
amplifier

Process connection

Customer tag
(if requested)

Snub-mount

connector

Junction box

Flow direction

arrow

Calibration tag

Approval tag

Approval tag

Sensor housing

Calibration tag

Flow direction

arrow

Booster amplifier

Core processor

Process connection

Customer tag (if
requested)

Snub mount connector

D600 sensor with integral booster amplifier and junction box

D600 sensor with integral booster amplifier and core processor

4 Micro Motion® Model D and DT Sensors Instruction Manual

Before You Begin continued

Approval tag

Sensor housing

Remote booster

amplifier

Process connection

Customer tag
(if requested)

Snub-mount

connector

Junction box

Flow direction

arrow

Calibration tag

Explosion-proof wiring

Intrinsically

safe wiring

Approval tag

Factory-supplied wiring

Approval
tag

Explosion-proof wiring

Intrinsically safe

wiring

Flow

direction

arrow

Core
processor

Sensor housing

Approval tag

Calibration tag

Remote booster

amplifier

Customer tag
(if requested)

Process connection

Snub mount

connector

Factory-supplied wiring

D600 sensor with remote booster amplifier and junction box

D600 sensor with remote booster amplifier and core processor

Micro Motion® Model D and DT Sensors Instruction Manual 5

Before You Begin continued

Flow direction arrow

Calibration tag

Sensor cable with flexible conduit

Process
connection

Approvals tag

Ground screw

Lifting handle

Sensor housing

DT065, DT100, and DT150 sensors

The installation process

Installing your new sensor involves five steps:

Step 1. Location

Determining the proper location for the sensor, taking into account
hazardous areas, process piping, transmitter location, and valves. See
page 9.

Step 2. Orientation

Determining the desired orientation for the sensor in the process
pipeline. See page 13.

Step 3. Mounting

Installing the sensor in the pipeline. See page 17.

Step 4. Wiring

Connecting the flowmeter cable to the sensor and transmitter. See
page 19.

Step 5. Startup

Requirements for flowmeter startup. See page 39.

6 Micro Motion® Model D and DT Sensors Instruction Manual

Before You Begin continued

Additional information

In addition to installation instructions, the following subjects are also
covered in this manual:

• Troubleshooting for problems that might be attributable to the sensor
begins on page 41.

• Purge fittings are described in Appendix A, page 55.

• Rupture disks are discussed in Appendix B, page 59.

• Maintenance of labels is covered in Appendix C, page 61.

• Return policy for Micro Motion equipment is described in Appendix D,
page 65.

Micro Motion® Model D and DT Sensors Instruction Manual 7

8 Micro Motion® Model D and DT Sensors Instruction Manual

Keys for sensor location

The sensor may be located anywhere in the process line, as long as
the following conditions are met:

• Before operation, you must be able to stop flow through the sensor.
(During the zeroing procedure, flow must be stopped completely, and
the sensor must be full of process fluid.)

• The sensor must be installed in an area that is compatible with the
classification specified on the sensor approvals tag. (See
illustrations, pages 3-6.)

Installation

Step 1

Location

Pipe run

Maximum wiring distances

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

Use these guidelines for calculating maximum wiring distances.
Maximum distance between sensor and transmitter depends on cable
type. See Table 1.

.

Table 1. Maximum cable lengths

Cable type Wire gauge 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

User-supplied 4-wire

• Power wires (VDC) 22 AWG

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

(1)Micro Motion recommends using Micro Motion cable.

(1)

Not applicable 60 feet (20 meters)

Not applicable 1000 feet (300

meters)

meters)

(0,35 mm

20 AWG (0,5 mm

18 AWG (0,8 mm

larger

2

) 300 feet (90 meters)

2

) 500 feet (150 meters)

2

) 1000 feet (300

2

) or

meters)

1000 feet (300
meters)

Micro Motion® Model D and DT Sensors Instruction Manual 9

Location continued

DT sensor junction box

Environmental limits

Model DT sensors come with a 3-foot (1 meter) pigtail of cable
pre-installed. A junction box can be installed at the end of this pigtail.

Sensor temperature limits

Temperature limits vary by sensor; refer to Table 2.

Table 2. Temperature specifications

Sensor type °F °C

DS025

DS040

DS065

DS100

DS150

DS150Z

DS300

DS300Z

DH025

DH038

DH100

DH150

DH300

DT065

DT100

DT150

D600 with integral booster amplifier

D600 with remote booster amplifier

–400 to +350 –240 to +177

–400 to +350 –240 to + 177

–400 to +350 –240 to + 177

–400 to +400 –240 to + 204

–400 to +400 –240 to + 204

+32 to +250 0 to + 121

–400 to +400 –240 to + 204

+32 to +250 0 to + 121

–400 to +350 –240 to + 177

–400 to +350 –240 to + 177

–400 to +400 –240 to + 204

–400 to +400 –240 to + 204

–400 to +400 –240 to + 204

+32 to +800 0 to + 426

+32 to +800 0 to + 426

+32 to +800 0 to + 426

–58 to +140 –50 to +60

–400 to +400 –240 to +200

Valves

For ATEX approvals, process fluid temperature can be further restricted
by ambient temperatures. For guidelines, go to www.micromotion.com/
atex.

D600 booster amplifier ambient temperature limits

Install the booster amplifier in a location that falls within the following
limits:

Ambient temperature limits between –58 to +140°F (–50 to +60 °C).

For ATEX approvals, process fluid temperature can be further restricted
by ambient temperatures. For guidelines, go to www.micromotion.com/
atex.

After the sensor and transmitter have been fully installed, you must
perform the zeroing procedure. During the zeroing procedure, flow
through the sensor must be halted and the sensor tubes must be
completely full of process fluid. A shutoff valve, downstream from the
sensor, is required to halt flow during the zeroing procedure. For more
information about zeroing, see page 39.

10 Micro Motion® Model D and DT Sensors Instruction Manual

Location continued

Hazardous area installations

Make sure the hazardous area specified on the sensor approvals tag is
suitable for the environment in which the sensor is installed. (See
illustrations on pages 3-6.) For installation in an area that requires
intrinsic safety, refer to Micro Motion hazardous approval
documentation, shipped with the sensor 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.

If you don’t have access to the World Wide Web, you can obtain an I.S.
manual by contacting the Micro Motion Customer Service Department:

• In the U.S.A., phone [phone]-MASS (1-800-522-6277), 24 hours

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

• In Asia, phone [phone] (Singapore)

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

• Outside the U.K., phone [phone] (The Netherlands)

Micro Motion® Model D and DT Sensors Instruction Manual 11

12 Micro Motion® Model D and DT Sensors Instruction Manual

Installation

Keys for sensor orientation

The sensor will function properly in any orientation if the sensor flow
tubes remain filled with process fluid.

Step 2 Orientation

Flow direction

Process fluid

Micro Motion sensors measure accurately regardless of flow direction as
long as the sensor flow tubes remain filled with process fluid.

Flow direction arrow

The sensor has a flow direction arrow (see illustrations, pages 3-6) to
help you configure the transmitter for flow direction. Process fluid flowing
in the direction opposite to the flow direction arrow may cause
unexpected transmitter output unless the transmitter is configured
appropriately. For instructions on configuring the transmitter’s flow
direction parameter, refer to the transmitter instruction manual.

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.

Typical sensor orientations are shown in the tables on the following
pages:

• For measuring liquids, see page 14.

• For measuring gases, see page 15.

• For measuring slurries, see page 16.

Micro Motion® Model D and DT Sensors Instruction Manual 13

Orientation continued

Flow

Flow

Flow

Orientations for measuring liquids

Sensor
model

DS025
DH025
DH038
DS040

DS065
DS100
DH100
DS150
DH150
DS300
DH300
D600

DT65
DT065
DT100
DT150

Preferred orientation for

measuring liquids

Tubes down

Horizontal pipeline

Tubes down

Horizontal pipeline

Tubes down

Horizontal pipeline

Alternative orientation for

measuring liquids

Tubes up

Horizontal pipeline

Self-draining

Tubes up

Horizontal pipeline

Self-draining

Tubes up

Horizontal pipeline

Self-draining

Flag mount

Vertical pipeline

Flag mount

Vertical pipeline

Flag mount

Vertical pipeline

14 Micro Motion® Model D and DT Sensors Instruction Manual

Orientation continued

Flow

Flow

Flow

Orientations for measuring gases

Sensor
model

DS025
DH025
DH038
DS040

DS065
DS100
DH100
DS150
DH150
DS300
DH300
D600

DT65
DT065
DT100
DT150

Preferred orientation for

measuring gases

Tubes up

Horizontal pipeline

Self-draining

Tubes up

Horizontal pipeline

Self-draining

Tubes up

Horizontal pipeline

Self-draining

Alternative orientation for

Flag mount

Vertical pipeline

Flag mount

Vertical pipeline

Flag mount

Vertical pipeline

measuring gases

Dry gases only

Tubes down

Horizontal pipeline

Dry gases only

Tubes down

Horizontal pipeline

Dry gases only

Tubes down

Horizontal pipeline

Micro Motion® Model D and DT Sensors Instruction Manual 15

Orientation continued

Flow

Flow

Flow

Orientations for measuring slurries

Sensor
model

DS025
DH025
DH038
DS040

DS065
DS100
DH100
DS150
DH150
DS300
DH300
D600

DT65
DT065
DT100
DT150

Preferred orientation for

measuring slurries

Flag mount

Vertical pipeline

Flag mount

Vertical pipeline

Flag mount

Vertical pipeline

Alternative orientation for

measuring slurries

Tub e s u p

Horizontal pipeline

Self-draining

Tub e s u p

Horizontal pipeline

Self-draining

Tub e s u p

Horizontal pipeline

Self-draining

16 Micro Motion® Model D and DT Sensors Instruction Manual

Installation

CAUTION

Keys for sensor mounting

Use your common piping practices to minimize:

• Torque on process connections

• Bending load on process connections

• For proper orientation, see pages 14-16

• For optional D600 mounting, see page 18

Step 3 Mounting

Mounting any D or DT sensor

Using the sensor to support piping
can damage the sensor or
cause measurement error.

Do not use sensor to support pipe.

Micro Motion® Model D and DT Sensors Instruction Manual 17

Mounting continued

Snub-mount connector

• Connect support only to the factory-supplied
rubber snub-mount connector

• Attach with 1/2"-13 UNC bolt

• Bolt may penetrate isolator to 1 1/2" (40 mm)

D600 in flag-mount orientation can use
snub connector for added support in
high-vibration installations

Conduit openings If possible, install wiring with the conduit openings pointed downward to

reduce the risk of condensation or excessive moisture in the housing.
Otherwise, install drip legs on the cable or conduit.

Optional Model D600 mounting

When installing a Model D600 in a high-vibration area, additional
support may be added if desired. Use the D600 snub-mount connector
with vibration isolator to help support the sensor. See illustration, below.
Typically, the snub-mount connector is used when the D600 is installed
in the flag-mount orientation (in a vertical pipeline), as shown below.

Model D600 mounting with snub-mount connector

DT sensors

Model DT sensors come with a 3-foot (1-meter) pigtail of cable
pre-installed. A junction box can be connected at the end of this pigtail.
The junction box is used for connecting the cable from the transmitter.

18 Micro Motion® Model D and DT Sensors Instruction Manual

Installation

WARNING

Step 4 Wiring

Hazardous area installations

Model D sensor junction box

The following warning applies to hazardous area installations

Failure to comply with requirements for intrinsic
safety in a hazardous area could result in an
explosion.

• Make sure the hazardous area specified on the sensor
approvals tag is suitable for the environment in which the
sensor is installed. See illustrations, pages 3-6.

• For installation in an area that requires intrinsic safety,
refer to Micro Motion hazardous approval installation
instructions.

• For hazardous area installations in Europe, refer to
standard EN 60079-14 if national standards do not apply.

Most Model D sensors are shipped with a junction box for wiring. There
are two types of junction boxes: one for the D600 sensor, one for all the
other D sensors.

• The D600 junction box is different than the junction box for other D
sensors. D600 sensors are also available with a core processor. For
more information on the D600 sensor, see page 24.

• Model DT sensors can use a junction box. For more information on the
DT sensor junction box, see page 20.

For Model D sensors (except the DT series and D600):

• If it if not already installed, install the junction box on the sensor,
following the wiring instructions on the junction box.

• If possible, install wiring with the junction-box opening pointed
downward, or with a drip leg in the conduit or cable, to reduce the risk
of condensation or excessive moisture in the junction box. See
illustration on page 20.

• Next, follow the guidelines in Connecting and shielding 9-wire cable to
wire the sensor to the transmitter.

Micro Motion® Model D and DT Sensors Instruction Manual 19

Wiring continued

3/4" NPT female
conduit opening

Drip leg in
conduit or cable

Model D sensor junction box

Model DT sensor cable and junction box

Model DT sensors can use a junction box. Model DT sensors come with
a 3-foot (1 meter) pigtail of pre-installed cable and a 3-foot (1 meter)
piece of conduit that needs to be fitted over the pre-installed cable. See
illustration on page 21.

• Slide the conduit over the pre-installed cable.

• Screw the conduit fitting end into the sensor.

The other end of the conduit can be connected to a user-supplied
junction box or directly to a transmitter.

• If the conduit is connected to a user-supplied junction box, connect the
wires to the terminals on the junction box. If possible, install wiring with
junction-box openings pointed downward, or with drip legs in the
conduits or cables, to reduce the risk of condensation or excessive
moisture in the junction box. Next, connect the 9-wire cable from the
junction box to the transmitter by following the instructions in
Connecting and shielding 9-wire cable.

• If the conduit is connected directly to a transmitter, refer to the wiring
instructions in the transmitter Quick Reference Guide.

20 Micro Motion® Model D and DT Sensors Instruction Manual

Wiring continued

Drip leg

1/2" NPT

conduit fitting

3 ft. (1 m) factory-supplied flex conduit

• Liquid tight to meet CE requirements
for European installations

• Permanently attached to sensor

Grounding screw

1/2" NPT conduit fitting

• Factory-supplied fitting

• Ensure 360

° contact

CAUTION

Model DT sensor cable

Connecting and shielding 9-wire cable

A 9-wire connection is required between the junction box and the core
processor or transmitter. Micro Motion offers two types of 9-wire cable:

• Shielded

•Armored

Both cable types contain shield drain wires. You may also use jacketed
cable with conduit.

Cable connections to sensor and transmitter

The wiring procedure is the same for the sensor and transmitter. Refer to
the wiring diagrams on the following pages, and follow these steps:

Failure to seal the sensor and transmitter housings
could cause a short circuit, which would result in
measurement error or flowmeter failure.

• Ensure integrity of gaskets and O-rings.

• Grease all O-rings before sealing.

• Install drip legs in cable or conduit.

• Seal all conduit openings.

Micro Motion® Model D and DT Sensors Instruction Manual 21

Wiring continued

CAUTION

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D or DT

sensor terminals

Flowmeter

cable

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Ye l l ow

Black
(Drains from all
wire sets)

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White

Brown

Red

Orange

Ye l l ow

Green

Blue

Violet

Gray

White

Black (drains)

Connect outer
braid of shielded or

armored cable
For DT sensor junction box
information, see page 20.

Model 3500

with I/O cable

Not approved for intrinsic safety

in Europe

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D or DT

sensor terminals

Flowmeter

cable

Model 3500

with screw-type or

solder-tail terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Ye l l ow

Black
(Drains from all
wire sets)

Yellow

Violet

Green

Blue

Brown

Black (Drains)
Orange
White
Gray
Red

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

c4
c6
c8
c10
c12

a4
a6

a8
a10
a12

Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White

For DT sensor junction box
information, see page 20.

1. Locate the wires by color and terminal number.

2. Insert the stripped ends of the individual wires into the terminal
blocks. No bare wires should remain exposed.

• At the sensor, connect wiring inside the junction box.

• At the transmitter, connect wiring to the transmitter’s intrinsically

safe terminals for sensor wiring.

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

4. Ensure integrity of gaskets, then tightly close and seal the
junction-box cover and all housing covers on the transmitter.

Drain wires from a 9-wire cable must be clipped at the
sensor end and insulated with heat-shrink wrapping.
Failure to properly terminate drain wires will cause
sensor error.

Model D or DT sensor (except D600) wiring to Model 3500 with I/O cable

Model D or DT sensor (except D600) wiring to Model 3500 with screw or solder terminals

22 Micro Motion® Model D and DT Sensors Instruction Manual

Wiring continued

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D or DT

sensor terminals

Flowmeter

cable

Model 3700

terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Ye l l ow

Black
(Drains from all
wire sets)

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White

Red
Brown
Yellow
Black (drains)
Violet
Orange
Green
White
Blue
Gray

For DT sensor junction box
information, see page 20.

9 7531

86420

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D or DT

sensor terminals

Flowmeter

cable

Field-mount

RFT9739 terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Brown

Orange

Green

Violet
White

Gray
Blue

Yellow

Red

Black (Drains)

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White

For DT sensor junction-box
information, see page 20.

CN1

BZ

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D or DT

sensor terminals

Flowmeter

cable

Rack-mount

RFT9739 terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Ye l l ow

Black
(Drains from all
wire sets)

Red

Yellow

Orange

White

Gray

Brown
Black (Drains)
Violet
Green
Blue

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

B2
B4
B6
B8
B10

Z2
Z4
Z6
Z8

Z10

Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White

For DT sensor junction box
information, see page 20.

Model D or DT sensor (except D600) wiring to Model 3700

Model D or DT sensor (except D600) wiring to RFT9739 field-mount transmitter

Model D or DT sensor (except D600) wiring to RFT9739 rack-mount transmitter

Micro Motion® Model D and DT Sensors Instruction Manual 23

Wiring continued

9 7531

86420

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D or DT

sensor terminals

Flowmeter

cable

RFT9712
terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Brown

Orange

Green

Violet
White

Gray
Blue

Yellow

Red

Black (Drains)

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White

For DT sensor junction box
information, see page 20.

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D or DT

sensor junction box

terminals

Flowmeter

cable

Field-mount Model

2700 terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Brown

Violet

Ye l l ow

Maximum cable length 60 ft. (20 m)

Prepare cable in accordance with the

instructions that are shipped with the cable.

Do not allow shields to contact sensor

junction box.

Blue
Gray
Orange

Red
Green
White

Ground screw

Black

Brown
Red
Orange
Ye l l ow
Green
Blue
Violet
Gray
White

10
11
12

GND

Brown
Red
Orange
Yellow
Green
Blue
Violet
Gray
White

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue
Gray

Clip drain wire back

Orange

Violet

Ye l l ow

Clip drain wire back

Flowmeter

cable

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

Black (Drains,

remote-mount only)

Brown

Red

Orange

Yellow

Green

Blue

Violet

Gray

White

Model D sensor

terminals

* Model D600 and DT sensors cannot be used with IFT9701 transmitters

IFT9701 or

Model 5300 terminals

Model D or DT sensor (except D600) wiring to RFT9712 transmitter

Model D sensor or DT (except D600) wiring to Model 1700 or 2700 transmitter

Model D sensor wiring (except the D600) to IFT9701* and Model 5300 transmitters

24 Micro Motion® Model D and DT Sensors Instruction Manual

Wiring continued

CAUTION

WARNING

D600 sensor

For wiring between the sensor and transmitter, there are two options:
junction box or core processor.

• For wiring instructions from junction box to transmitter, see page 29.

• For wiring from core processor to transmitter or for direct host, see
page 32.

The D600 also requires wiring to an AC power supply for the integral and
remote version of the booster amplifier. Between 85-250 VAC of power
must be provided. See pages 26-27.

The remote version of the booster amplifier requires wiring to the sensor
and wiring of the drive wires. See page 28.

The sensor is shipped with 16 feet (5 meters) of 9-wire cable for
connecting from the remote booster amplifier to the intrinsically safe
junction box located on the sensor. For longer cable lengths, up to 60
feet (20 meters), contact Micro Motion.

Improper installation of wiring could cause
measurement error or sensor failure.

• Shut off power before installing power-supply wiring.

• Follow all instructions to ensure sensor will operate
correctly.

• Install drip legs in conduit or cable.

• Seal all conduit openings.

• Ensure integrity of gaskets, and fully tighten sensor
junction-box cover, core processor cover, and all
transmitter housing covers.

Explosion Hazard

In a hazardous area:

• Do not open booster amplifier housing cover while
booster amplifier is energized.

• Wait at least 30 minutes after power is shut off before
opening.

Micro Motion® Model D and DT Sensors Instruction Manual 25

Wiring continued

Screw and terminal cover

Chassis ground

L/L

1

N/L

2

85-250 VAC
50/60 Hz

Supplementary bonding connection

Power supply wiring to the remote booster amplifier

• Remove screw and terminal cover before installing wiring. Re-install
cover before operating.

• Provide 85-250 VAC power to terminals L2 and L1 as shown in the
diagram below.

• This unit is provided with an external terminal for supplementary
bonding connections. This terminal is for use where local codes or
authorities permit or require such connections.

Remote booster amplifier power-supply wiring

26 Micro Motion® Model D and DT Sensors Instruction Manual

Wiring continued

85-250 VAC

50/60 Hz

N/L2 L/L1

Power supply

ground

Wiring

compartment

Supplementary bonding connection

Power supply wiring to the integral booster amplifier

Provide 85-250 VAC power to terminals L2 and L1 as shown in the
diagram below.

This unit is provided with an external terminal for supplementary
bonding connections. This terminal is for use where local codes or
authorities permit or require such connections.

Integral booster amplifier power-supply wiring

Micro Motion® Model D and DT Sensors Instruction Manual 27

Wiring continued

User-supplied drive wiring,
18 AWG (0,75 mm

2

). See
page 29 for connections at
remote booster amplifier.

White

Blue

Violet

Ye l l o w

Orange

Red (factory wired)

Brown (factory wired)

Factory-supplied drive
wiring

Gray

Factory-supplied 9-wire
cable for intrinsically safe
wiring (RTD and pickoffs)

Remote booster amplifier

Green

Explosion-proof wiringIntrinsically safe wiring

12

Wiring from the remote booster

For intrinsically safe junction box wiring (see left side of figure below):

amplifier to the sensor

• Terminate factory-supplied 9-wire cable. Match wire colors to the
corresponding terminal wire colors from the remote booster amplifier.

• Orange wire in cable does not have corresponding orange wire from
sensor. Note: Terminate the orange wire in cable to the terminal shown
in diagram below.

• Clip remaining wires (brown and red) of cable (intrinsically safe side
only) and insulate.

For explosion-proof junction box wiring (see right side of figure below):

Install user-supplied drive wiring, shielded 18 AWG (0,75 mm
cable, from remote booster amplifier terminals 1 and 2 to sensor
terminals 1 and 2. (See figure on page 29 for wiring at booster amplifier.)

Remote booster amplifier wiring to sensor

2

) 2-wire

28 Micro Motion® Model D and DT Sensors Instruction Manual

Wiring continued

Factory-supplied 9-wire

cable for intrinsically

safe wiring

(RTD and pickoffs)

Wiring to
transmitter

Remove screw and terminal cover
before installing wiring. Re-install
cover before operating

Connection diagram

From remote
booster amp

terminal

To sensor

explosion-proof

J-box terminal
11
22

CAUTION

Remote booster amplifier drive wiring

Wiring to a transmitter (D600 sensor with junction box)

The instructions in this section explain how to connect a fully prepared
9-wire Micro Motion flowmeter cable to the sensor and transmitter.

• The procedure for preparing Micro Motion cable and cable glands is
described in the instructions that are shipped with the cable.

• Install cable and wiring to meet local code requirements.

Cable connections to sensor and transmitter

The wiring procedure is the same for the sensor and transmitter. Refer to
the wiring diagrams on the following pages, and follow these steps:

Failure to seal the sensor and transmitter housings
could cause a short circuit, which would result in
measurement error or flowmeter failure.

• Ensure integrity of gaskets and O-rings.

• Grease all O-rings before sealing.

• Install drip legs in cable or conduit.

• Seal all conduit openings.

Micro Motion® Model D and DT Sensors Instruction Manual 29

Wiring continued

CAUTION

Brown

Red

Orange

Yellow

Green

Blue

Violet

Gray

White

Black (drains)

Connect outer
braid of shielded
or armored cable

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Ye l l ow

Clip drain wire back

Flowmeter

cable

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Maximum cable length 1000 ft. (300 m)

Green

White

Brown

Violet

Ye l l ow

Orange

Blue
Gray
Red

Model D600 sensor

junction box

terminals

Model 3500

with I/O cable

Not approved for intrinsic safety

in Europe

Prepare cable in accordance with the

instructions that are shipped with the cable.

Do not allow shields to contact sensor

junction box.

Model 3500

with screw-type or

solder-tail terminals

Ye l l ow

Violet

Green

Blue

Brown

Black (Drains)
Orange
White
Gray
Red

c4
c6
c8
c10
c12

a4
a6

a8
a10
a12

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Ye l l ow

Clip drain wire back

Flowmeter

cable

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Maximum cable length 1000 ft. (300 m)

Green

White

Brown

Violet

Ye l l ow

Orange

Blue
Gray
Red

Model D600 sensor

junction box

terminals

Prepare cable in accordance with the

instructions that are shipped with the cable.

Do not allow shields to contact sensor

junction box.

1. Locate the wires by color and terminal number.

2. Insert the stripped ends of the individual wires into the terminal
blocks. No bare wires should remain exposed.

• At the sensor, connect wiring inside the junction box.

• At the transmitter, connect wiring to the transmitter’s intrinsically

safe terminals for sensor wiring.

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

4. Ensure integrity of gaskets, then tightly close and seal the
junction-box cover and all housing covers on the transmitter.

Drain wires from a 9-wire cable must be clipped at the
sensor end and insulated with heat-shrink wrapping.
Failure to properly terminate drain wires will cause
sensor error.

Model D600 wiring to Model 3500 with I/O cable

Model D600 wiring to Model 3500 with screw or solder terminals

30 Micro Motion® Model D and DT Sensors Instruction Manual

Wiring continued

Model 3700

terminals

Red
Brown
Ye l l ow
Black (drains)
Violet
Orange
Green
White
Blue
Gray

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Flowmeter

cable

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Ye l l ow

Black
(Drains from all
wire sets)

Maximum cable length 1000 ft. (300 m)

Green

White

Brown

Violet

Yellow

Orange

Blue
Gray
Red

Model D600 sensor

junction box

terminals

Prepare cable in accordance with the

instructions that are shipped with the cable.

Do not allow shields to contact sensor

junction box.

Green

White

Brown

Violet

Ye l l ow

Orange

Blue
Gray
Red

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Ye l l ow

Clip drain wire back

Model D600 sensor

junction box

terminals

Flowmeter

cable

Field-mount

RFT9739 terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Brown

Orange

Green

Violet
White

Gray

Blue

Yellow

Red

Black (Drains)

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the

instructions that are shipped with the cable.

Do not allow shields to contact sensor

junction box.

Rack-mount

RFT9739 terminals

Red

Ye l l ow

Orange

White

Gray

Brown
Black (Drains)
Violet
Green
Blue

B2
B4
B6
B8
B10

Z2
Z4
Z6
Z8

Z10

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Ye l l ow

Clip drain wire back

Flowmeter

cable

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Maximum cable length 1000 ft. (300 m)

Green

White

Brown

Violet

Ye l l ow

Orange

Blue
Gray
Red

Model D600 sensor

junction box

terminals

Prepare cable in accordance with the

instructions that are shipped with the cable.

Do not allow shields to contact sensor

junction box.

Model D600 wiring to Model 3700

Model D600 wiring to RFT9739 field-mount transmitter

Model D600 wiring to RFT9739 rack-mount transmitter

Micro Motion® Model D and DT Sensors Instruction Manual 31

Wiring continued

9 753 1

8 6420

9 753 1

8 6420

9 753 1

8 6420

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue
Gray

Clip drain wire back

Orange

Violet

Yellow

Clip drain wire back

Model D600 sensor

terminals

Flowmeter

cable

RFT9712
terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Brown

Orange

Green

Violet

White

Gray
Blue

Yellow

Red

Black (Drains)

Maximum cable length 1000 ft. (300 m)

Prepare cable in accordance with the instructions

that are shipped with the cable

Green

White

Brown

Violet

Ye l l ow

Orange

Blue
Gray
Red

Green

White

Brown

Violet

Ye l l ow

Orange

Blue
Gray
Red

Brown

Red

Clip drain wire back

Green

White

Clip drain wire back

Blue

Gray

Clip drain wire back

Orange

Violet

Ye l l ow

Clip drain wire back

Model D600 sensor

junction box

terminals

Flowmeter

cable

Field-mount Model

2700 terminals

Brown
Red

Green
White

Blue
Gray

Orange
Violet
Yellow

Black
(Drains from all
wire sets)

Brown

Violet

Ye l l ow

Maximum cable length 60 ft. (20 m)

Prepare cable in accordance with the

instructions that are shipped with the cable.

Do not allow shields to contact sensor

junction box.

Blue
Gray
Orange

Red
Green
White

Ground screw

Black

Model D600 wiring to RFT9712 transmitter

Model D600 sensor wiring to the 9-wire Model 1700 or 2700 transmitter

Core processor to a 4-wire remote transmitter or remote host

32 Micro Motion® Model D and DT Sensors Instruction Manual

To connect wiring at the core processor:

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

• If you are installing unshielded wiring in continuous metallic conduit

that provides 360° termination shielding for the enclosed wiring, go
to Step 6, page 35.

• If you are installing 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.

• 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.

Wiring continued

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

Shield drain wire(s) wrapped twice around exposed shield foil

- 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.

2. Remove the cover from the core processor.

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

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.

e. Place the EMI-shielded heat shrink over the exposed shield drain

wire(s). The tubing should completely cover the drain wires.

Micro Motion® Model D and DT Sensors Instruction Manual 33

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

the tubing.

Wiring continued

Shielded heat shrink completely covers exposed drain wires

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.

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

opening.

5. Insert the wires through the gland body and assemble the gland by
tightening the gland nut.

6. Identify the wires in the 4-wire cable. The 4-wire cable supplied by
Micro Motion consists of one pair of 18 AWG (0,75 mm

2

) wires (red
and black), which should be used for the VDC connection, and one
pair of 22 AWG (0,35 mm

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, matching corresponding
numbered terminals on the transmitter.

34 Micro Motion® Model D and DT Sensors Instruction Manual

Wiring continued

WARNING

Power supply +

(Red wire)

Power su pply –

(Black wire)

RS-485A
(White wire)

RS-485B
(Green wire)

Core processor housing internal ground screw

• For connections to earth ground when sensor cannot be grounded via
piping and local codes require ground connections to be made internally

• Do not connect shield drain wires to this terminal

7. Reattach the core processor housing.

Twisting the core processor will damage the sensor.

Do not twist the core processor.

8. Shield and shield drain wire(s) should not be grounded at the
transmitter.

• For wiring at the transmitter, see the transmitter Quick Reference

Guide (QRG).

• If you are connecting to an MVDSolo with MVD Direct Connect

barrier supplied by Micro Motion, the barrier supplies power to the
core processor. Refer to the barrier documentation to identify the
terminals at the barrier.

• If you are connecting to an MVDSolo without I.S. barrier:

- Connect the VDC wires from the core processor (see figure on
page 36) to an independent power supply. This power supply must
connect only to the core processor. A recommended power supply
is the SDN series of 24-VDC power supplies manufactured by
Sola/Hevi-Duty.

- Do not ground either connection of the power supply.

™

I.S.

- Connect the RS-485 wires from the core processor (see figure
below) to the RS-485 terminals at the remote host. Refer to the
vendor documentation to identify the terminals.

Micro Motion® Model D and DT Sensors Instruction Manual 35

Wiring continued

Power supply +

Power supply –

RS-485B

RS-485A

CAUTION

Core processor terminals

Sensor grounding

Ground the sensor and transmitter independently.

Improper grounding could cause measurement error.

To reduce the risk of measurement error:

• Ground the flowmeter to earth, or follow ground network
requirements for the facility.

• For installation in an area that requires intrinsic safety,
refer to Micro Motion hazardous approval documentation,
shipped with the sensor or available from the Micro
Motion web site.

• For hazardous area installations in Europe, refer to
standard EN 60079-14 if national standards do not apply.

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 core processor or junction box.

If national standards are not in effect, follow these guidelines:

• Use copper wire, 14 AWG (2,5 mm

2

) 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.

36 Micro Motion® Model D and DT Sensors Instruction Manual

Refer to the transmitter documentation for instructions on grounding the
transmitter.

Wiring continued

Other Model D

sensors

Model DT

sensors

Model D600

sensors

Sensor grounding screw

Micro Motion® Model D and DT Sensors Instruction Manual 37

38 Micro Motion® Model D and DT Sensors Instruction Manual

Installation

Step 5 Startup

Zeroing

Configuration, calibration, and characterization

After the flowmeter has been fully installed, you must perform the
zeroing procedure. Flowmeter zeroing establishes flowmeter response
to zero flow and sets a baseline for flow measurement. Refer to the
transmitter instruction manual for information on performing the zeroing
procedure.

You can use the transmitter to configure, calibrate, and characterize the
meter. For more information, refer to the transmitter instruction manuals.

The following information explains the difference between configuration,
calibration, and characterization. Certain parameters might require
configuration even when calibration is not necessary.

Configuration parameters include such items as flowmeter tag,
measurement units, flow direction, damping values, and slug flow
parameters. If requested at time of order, the meter is configured at the
factory according to customer specifications.

Calibration accounts for the flowmeter’s sensitivity to flow, density, and
temperature. Calibration is done at the factory.

Characterization is the process of entering calibration factors for flow,
density, and temperature directly into transmitter memory, instead of
performing field calibration procedures. Calibration factors can be found
on the sensor serial number tag and on the certificate that is shipped
with the sensor.

For instructions about flowmeter configuration, calibration, and
characterization, see the manual that was shipped with the transmitter.

If the sensor and transmitter are ordered together as a Coriolis
flowmeter, the factory has characterized the meter — no additional
characterization is necessary. If either the sensor or transmitter is
replaced, characterization is required.

Micro Motion® Model D and DT Sensors Instruction Manual 39

Startup continued

Customer Service

The Micro Motion Customer Service Department is available for
assistance with flowmeter startup if you experience problems you
cannot solve on your own.

If possible, provide us with the model numbers and/or serial numbers of
your Micro Motion equipment, which will assist us in answering your
questions.

• In the U.S.A., phone [phone]-MASS (1-800-522-6277), 24 hours

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

• In Asia, phone [phone] (Singapore)

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

• Outside the U.K., phone [phone] (The Netherlands)

• Or visit our website at www.micromotion.com.

40 Micro Motion® Model D and DT Sensors Instruction Manual

Troubleshooting

General information

Most troubleshooting is performed at the transmitter. However, the
following troubleshooting topics are described in this manual:

• Zero drift, page 42

• Erratic flow rate, page 43

• Inaccurate flow rate or batch total, page 44

• Inaccurate density reading, page 45

• Inaccurate temperature reading, page 46

If you cannot find the problem you are looking for, check the transmitter
instruction manual.

To troubleshoot the flowmeter, you might need a digital multimeter
(DMM) or similar device, the transmitter display, if it has one, and one of
the following:

• HART Communicator

• ProLink or ProLink II software

• AMS software

• Modbus master controller (RFT9739, Series 1000, or Series 2000)

• Fieldbus host controller (Series 1000 or Series 2000)

• Profibus-PA host controller (Series 1000 or Series 2000)
If you cannot find the problem you are looking for, or if troubleshooting
fails to reveal the problem, contact the Micro Motion Customer Service
Department.

If possible, provide us with the model numbers and/or serial numbers of
your Micro Motion equipment, which will assist us in answering your
questions.

• In the U.S.A., phone [phone]-MASS (1-800-522-6277), 24 hours

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

• In Asia, phone [phone] (Singapore)

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

• Outside the U.K., phone [phone] (The Netherlands)

Micro Motion® Model D and DT Sensors Instruction Manual 41

Troubleshooting continued

Zero drift

Symptom

The flowmeter indicates the process fluid is flowing while flow is
stopped; or indicates a flow rate that does not agree with a reference
rate at low flow, but does agree at higher flow rates.

Troubleshooting instructions

To troubleshoot zero drift, you will need one of the communications
devices listed on page 46 or a transmitter with a display. Refer to the
table below for the necessary steps to troubleshoot zero drift.

Table 1. Troubleshooting zero drift

Procedure Instructions What to do next

1. Check for leaking valves and seals • If no leaks are found, go to step 2

2. Check the flow units See page 46 • If the flow units are OK, go to step 3

3. Make sure the flowmeter was

zeroed properly

4. Check for the proper flow
calibration factor

5. Check the damping value See page 50 • If the damping value is OK, go to step 6

6. Check for two-phase flow See page 53 • If there is no two-phase flow, go to step 7

7. Check for moisture in the sensor

junction box

8. Check for faulty or improperly
installed flowmeter wiring

9. Check for faulty or improperly
installed grounding

10. Check for mounting stress on the
sensor

11. Check for vibration or crosstalk See page 53 • If there is no vibration or crosstalk, go to step 12

12. Make sure the sensor is oriented

properly

13. Check for plugging or build-up on
the sensor flow tubes

14. Check for RF interference See page 51 • If there is no interference, or the source cannot be detected,

15. Check again for zero drift • If there is no longer any zero drift, you’ve solved the problem

16. Contact Micro Motion Phone numbers are

See page 39 • If the flowmeter was zeroed properly, go to step 4

See page 49 • If the flow cal factor is correct, go to step 5

See page 52 • If there is no moisture present, go to step 8

See page 47 • If the wiring is OK, go to step 9

See page 51 • If the grounding is OK, go to step 10

See page 53 • If the sensor mount is OK, go to step 11

See page 13 • If the sensor is oriented properly, go to step 13

See page 54 • If the tubes are not plugged, go to step 14

listed on page 41

• If leaks are found, eliminate them, then go to step 15

• If the flow units are wrong, change them, then go to step 15

• If the flowmeter was not zeroed properly, zero it, then go
to step 15

• If the flow cal factor is incorrect, change it, then go to step 15

• If the damping value is too low, change it, then go to step 15

• If there is two-phase flow, fix the problem, then go to step 15

• If there is moisture in the junction box, dry out and seal the
junction box, then go to step 15

• If the wiring is faulty, fix or replace it, then go to step 15

• If the grounding is incorrect or faulty, fix it, then go to step 15

• If there are mounting stresses, fix it, then go to step 15

• If there is vibration or crosstalk, eliminate it, then go to
step 15

• If the sensor is not oriented properly, change the orientation,
then go to step 15

• If there is plugging or build-up, clear the tubes, then go to
step 15

go to step 16

• If there is interference, eliminate it, then go to step 15

• If the zero drifts again, start over at step 3 or go to step 16

42 Micro Motion® Model D and DT Sensors Instruction Manual

Troubleshooting continued

Erratic flow rate

Symptom

The flowmeter indicates the flow rate is varying, even though it is steady.

Troubleshooting instructions

To troubleshoot an erratic flow rate, you will need one of the
communications devices listed on page 46 or a transmitter with a
display. Refer to the table below for the necessary steps to troubleshoot
an erratic flow rate.

Table 2. Troubleshooting erratic flow rate

Procedure Instructions What to do next

1. Check for erratic flow rate at the

transmitter

2. Check for faulty output wiring See page 47 • If the output wiring is OK, go to step 3

3. Check the receiving device for

malfunctions

4. Check the flow units See page 46 • If the flow units are OK, go to step 5

5. Check the damping value See page 50 • If the damping value is OK, go to step 6

6. Check for stable drive gain See page 50 • If the drive gain is stable, go to step 7

7. Check for a stable density reading See page 50 • If the density reading is stable, go to step 8

8. Check for faulty or improperly

installed flowmeter wiring

9. Check for faulty or improperly
installed grounding

10. Check for vibration or crosstalk See page 53 • If there is no vibration or crosstalk, go to step 11

11. Check for two-phase flow See page 53 • If there is no two-phase flow, go to step 12

12. Check for plugging or build-up on

the sensor flow tubes

13. Check again for erratic flow rate See page 47 • If the signal is no longer erratic, you’ve solved the problem

14. Contact Micro Motion Phone numbers are

See page 47 • If the signal is stable at the transmitter, go to step 2

See instruction
manual for the device

See page 47 • If the flowmeter wiring is OK, go to step 9

See page 51 • If the grounding is OK, go to step 10

See page 54 • If the tubes are not plugged, go to step 14

listed on page 41

• If the signal is erratic at the transmitter, go to step 4

• If the output wiring is faulty, repair or replace it, then go to
step 13

• If the receiving device is OK, go to step 4

• If the receiving device is faulty, contact the manufacturer

• If the flow units are wrong, change them, then go to step 13

• If the damping value is too low, change it, then go to step 13

• If the drive gain is not stable, go to step 11

• If the density reading is not stable, go to step 11

• If the flowmeter wiring is incorrect or faulty, fix or replace it,
then go to step 13

• If the grounding is incorrect or faulty, fix it, then go to step 13

• If there is vibration or crosstalk, eliminate it, then go to
step 13

• If there is two-phase flow, fix the problem, then go to step 13

• If there is plugging or build-up, clear the tubes, then go to
step 13

• If the signal is still erratic, start over at step 1 or go to step 14

Micro Motion® Model D and DT Sensors Instruction Manual 43

Troubleshooting continued

Inaccurate flow rate or batch total

Symptom

The flowmeter indicates a flow rate or batch total that does not agree
with a reference rate or total.

Troubleshooting instructions

To troubleshoot an inaccurate flow rate or batch total, you will need one
of the communications devices listed on page 46 or a transmitter with a
display. Refer to the table below for the necessary steps to troubleshoot
an inaccurate rate or total.

Table 3. Troubleshooting inaccurate flow rate or batch total

Procedure Instructions What to do next

1. Check for the proper flow

calibration factor

2. Check the flow units See page 46 • If the flow units are OK, go to step 3

3. Make sure the flowmeter was

zeroed properly

4. Is the flow measurement
configured for mass or volume?

5. Check for the proper density
calibration factor

6. Make sure the density reading is
accurate for the fluid

7. Make sure the temperature
reading is accurate for the fluid

8. Is the flow measurement
configured for mass or volume?

9. Is the reference total based on a
fixed density value?

10. Change flow units to mass flow
units

11. Check for faulty or improperly
installed grounding

12. Check for two-phase flow See page 53 • If there is no two-phase flow, go to step 13

13. Check the scale (or reference

measurement) for accuracy

14. Check for faulty or improperly
installed flowmeter wiring

15. Run a new batch and check again
for an inaccurate rate or total

16. Contact Micro Motion Phone numbers are

See page 49 • If the flow cal factor is correct, go to step 2

See page 39 • If the flowmeter was zeroed properly, go to step 4

See page 46 • If the configuration is for mass, go to step 6

See page 49 • If the dens cal factor is correct, go to step 6

See page 50 • If the density reading is correct, go to step 7

See page 50 • If the temperature reading is correct, go to step 8

See page 46 • If the configuration is for mass, go to step 11

See page 46 • Go to step 15

See page 51 • If the grounding is OK, go to step 12

Use your plant
procedures

See page 47 • If the flowmeter wiring is OK, go to step 16

listed on page 41

• If the flow cal factor is incorrect, change it, then go to step 15

• If the flow units are wrong, change them, then go to step 15

• If the flowmeter was not zeroed properly, zero it, then go
to step 15

• If the configuration is for volume, go to step 5

• If the dens cal factor is incorrect, change it, then go to
step 15

• If the density reading is wrong, go to step 11

• If the temperature reading is wrong, go to step 14

• If the configuration is for volume, go to step 9

• If the total is based on a fixed value, go to step 10

• If the total is not based on a fixed value, go to step 11

• If the grounding is incorrect or faulty, fix it, then go to step 15

• If there is two-phase flow, fix the problem, then go to step 15

• If the scale is accurate, go to step 14

• If the scale is not accurate, fix it, then go to step 15

• If the flowmeter wiring is incorrect or faulty, fix or replace it,
then go to step 15

• If the rate or total is correct, you’ve solved the problem

• If the rate or total is wrong, start over at step 2 or go to
step 16

44 Micro Motion® Model D and DT Sensors Instruction Manual

Troubleshooting continued

Inaccurate density reading

Symptom

The flowmeter density measurement is erratic, or is lower or higher than
the density of the fluid.

Troubleshooting instructions

To troubleshoot an inaccurate density reading, you will need one of the
communications devices listed on page 46 or a transmitter with a
display. Refer to the table below for the necessary steps to troubleshoot
an inaccurate density reading.

Table 4. Troubleshooting inaccurate density reading

Procedure Instructions What to do next

1. Check for stable density reading

at the transmitter

2. Check for the proper density
calibration factor

3. Check for faulty or improperly
installed flowmeter wiring

4. Check for faulty or improperly
installed grounding

5. Check to see if the density reading
is low or high

6. Run a quality check on the
process fluid

7. If you checked the wiring in step 3,
go to step 8, otherwise, check for
faulty or improperly installed
flowmeter wiring

8. Check for two-phase flow See page 53 • If there is no two-phase flow, go to step 9

9. Check for vibration or crosstalk See page 53 • If there is no vibration or crosstalk, go to step 12

10. Check for plugging or build-up on

the sensor flow tubes

11. Check again for inaccurate density
reading at the transmitter

12. Contact Micro Motion Phone numbers are

See page 50 • If the density reading is stable, go to step 2

See page 49 • If the dens cal factor is correct, go to step 4

See page 47 • If the flowmeter wiring is OK, go to step 4

See page 51 • If the grounding is OK, go to step 5

See page 50 • If the density reading is low, go to step 6

Use your plant
procedures

See page 47 • If the flowmeter wiring is OK, go to step 8

See page 54 • If the tubes are not plugged, go to step 12

See page 50 • If the reading is correct, you’ve solved the problem

listed on page 41

• If the density reading is not stable, go to step 3

• If the dens cal factor is incorrect, change it, then go to
step 11

• If the flowmeter wiring is incorrect or faulty, fix or replace it,
then go to step 11

• If the grounding is incorrect or faulty, fix it, then go to step 11

• If the density reading is high, go to step 10

• If the product quality is OK, go to step 7

• If the product quality is not OK, fix it, then go to step 11

• If the flowmeter wiring is incorrect or faulty, fix or replace it,
then go to step 11

• If there is two-phase flow, fix the problem, then go to step 11

• If there is vibration or crosstalk, eliminate it, then go to
step 11

• If there is plugging or build-up, clear the tubes, then go to
step 11

• If the reading is still wrong, start over at step 1 or go to
step 12

Micro Motion® Model D and DT Sensors Instruction Manual 45

Troubleshooting continued

Inaccurate temperature reading

Symptom

The flowmeter temperature reading is different than expected.

Troubleshooting instructions

To troubleshoot an inaccurate temperature reading, you will need one of
the communications devices listed on page 46 or a transmitter with a
display. Refer to the table below for the necessary steps to troubleshoot
an inaccurate temperature reading.

Table 5. Troubleshooting inaccurate temperature reading

Procedure Instructions What to do next

1. Check for faulty or improperly

installed flowmeter wiring

2. Check for the proper temperature
calibration factor

3. Check again for inaccurate
temperature reading at the
transmitter

4. Contact Micro Motion Phone numbers are

Troubleshooting at the transmitter

See page 47 • If the flowmeter wiring is OK, go to step 2

• If the flowmeter wiring is faulty, fix or replace it, then go to
step 3

See page 49 • If the temp cal factor is correct, go to step 4

• If the temp cal factor is incorrect, change it, then go to step 3

See page 50 • If the reading is correct, you’ve solved the problem

• If the reading is still wrong, start over at step 1 or go to step 4

listed on page 41

The tables in the preceding sections refer you to this section for
instructions on troubleshooting at the transmitter. To troubleshoot at the
transmitter, you might need a digital multimeter (DMM) or similar device,
the transmitter display, if it has one, and one of the following:

• HART Communicator

• ProLink or ProLink II software

• AMS software

• Modbus master controller (RFT9739 only, Series 1000, or Series 2000)

• Fieldbus host controller (Series 1000, or Series 2000)

• Profibus host controller (Series 1000 or 2000)

Checking or changing the flow units

Check or change the flow units (units of measure) configuration at the
transmitter. If necessary, refer to the instruction manual (or on-line help
for software) for the method you choose.

• Use the transmitter display, if it has one

• Use a HART Communicator, ProLink software, or AMS software

• Use a Modbus, fieldbus, or Profibus-PA host controller

Make sure the configured units of measure are the ones you want. Also,
make sure you know what the abbreviations mean. For example, g/sec is
grams per second, not gallons per second.

46 Micro Motion® Model D and DT Sensors Instruction Manual

Troubleshooting continued

Checking for erratic flow rate at the transmitter

Before troubleshooting erratic flow rate, you must first determine
whether it is a result of the transmitter or a connected output device.
Check for an erratic flow signal at the transmitter using any of the
following methods. If necessary, refer to the instruction manual (or
on-line help for software) for the method you choose.

• Use the transmitter display, if it has one

• Use a HART Communicator, ProLink software, or AMS software

• Use a Modbus, fieldbus, or Profibus-PA host controller

• Use a DMM on the transmitter’s 4-20 mA or frequency output terminals

If the flow rate or output signal is not erratic at the transmitter outputs,
the problem is not with the transmitter.

Checking for faulty output wiring

Having already checked the output at the transmitter end (above), use a
DMM to check the signal at the other end (the receiving end) of the
output wiring. If the signal is not erratic, the problem is not with the
output wiring.

Checking for faulty flowmeter wiring

Wiring problems are often incorrectly diagnosed as a faulty sensor.
Examine wiring between the sensor and transmitter as follows:

1. Check the cable preparation. The flowmeter cable must be
prepared correctly. The most common problem is improperly
prepared drain wires. See illustration, below. The drains are clipped at
the sensor end. They should not be connected to any terminals in the
sensor junction box. See wiring diagrams, pages 22-32.

2. Check wire terminations. Check to be sure wires are secured tightly
in the terminal blocks, and making good connections. Make sure no
wires remain exposed at either end of the flowmeter cable.

3. Check ohm levels. If the cable was properly prepared and terminal
connections are good, check resistance across wire pairs to
determine whether the flowmeter cable is faulty. The procedure is
performed first at the transmitter, then at the sensor. Follow these
steps:
a. Disconnect the transmitter’s power supply.
b. Disconnect sensor wiring from the transmitter’s flowmeter

terminals.

Micro Motion® Model D and DT Sensors Instruction Manual 47

Troubleshooting continued

Cable jacket

Wire sets

Wire sets

Drain wire
(one for each wire set)

c. Use a DMM to measure resistance across wire pairs at the

transmitter end of the cable. See table on page 48.

• If the measured value is within the range listed in the table,
reconnect wiring and restore power to the transmitter.

• If the measured resistance is outside the range listed in the table,
repeat the measurements at the sensor junction box.

- If the sensor is a not a D600, refer to the “Nominal resistance

ranges” table below.

- If the sensor is a D600, refer to the table and illustration on

page 49.

- If resistance values measured at the sensor are also outside the

range listed in the table, the sensor might be faulty.

Cross-section of cable with drain wires

Table 6. Nominal resistance ranges for flowmeter circuits (for all D and DT sensors except the D600)

Notes

• Disconnect wires from terminals before checking resistance values.

• Temperature-sensor value increases 0.38675 ohms per °C increase in temperature.

• Nominal resistance values will vary 40% per 100°C. However, confirming an open coil or shorted coil is more important than
any slight deviation from the resistance values presented below.

• Resistance across blue and gray wires (right pickoff circuit) should be within 10% of resistance across green and white wires
(left pickoff circuit).

• Actual resistance values depend on the sensor model and date of manufacture.

• Reading across wire pairs should be steady.

Circuit Wire colors Sensor terminals* Nominal resistance range

Drive coil Brown to red 1 to 2 8 to 2650 Ω
Left pickoff Green to white 5 to 9 16 to 300 Ω
Right pickoff Blue to gray 6 to 8 16 to 300 Ω
Temperature sensor Orange to violet 3 to 7 100 Ω at 0°C + 0.38675 Ω / °C
Lead length compensator Yellow to violet 4 to 7 100 Ω at 0°C + 0.38675 Ω / °C

* For transmitter terminal designations, refer to the table below. For D600 sensors, see the illustration and table on page 49.

48 Micro Motion® Model D and DT Sensors Instruction Manual

Troubleshooting continued

Check drive coil circuit, brown to red here

Check all circuits except
drive coil circuit (brown to
red wires) here

D600 sensor with integral booster amplifier

D600 sensor with remote mounted booster amplifier

(booster amplifier not shown)

Check all circuits except drive coil circuit (brown to red wires) here

Checking ohm levels at a D600 sensor (applicable only to sensors with a junction box)

Table 7. Nominal resistance values for D600 circuits

Notes

• Disconnect wires from terminals before checking resistance values.

• Temperature-sensor value increases 0.38675 ohms per °C increase in temperature.

• Nominal resistance values will vary 40% per 100°C. However, confirming an open coil or shorted coil is more important than
any slight deviation from the resistance values presented below.

• Resistance across blue and gray wires (right pickoff circuit) should be within 10% of resistance across green and white wires

(left pickoff circuit).

• Actual resistance values depend on the sensor model and date of manufacture.

• Reading across wire pairs should be steady.

• See previous illustration for terminal locations.

Circuit Wire colors Approximate nominal resistance

Drive coil Brown to red 16 Ω

Primary left pickoff Green to white 140 Ω

Primary right pickoff Blue to gray 140 Ω

Secondary left pickoff Brown to white 140 Ω

Secondary right pickoff Red to gray 140 Ω

Temperature sensor Yellow to violet 100 Ω at 0°C + 0.38675 Ω / °C

Micro Motion® Model D and DT Sensors Instruction Manual 49

Troubleshooting continued

Checking the calibration factors

Check or change the flow, density, or temperature calibration factors at
the transmitter. The temperature cal factor is for the RFT9739, Model
1700, Model 2700, Model 3500, and 3700 only. If necessary, refer to the
instruction manual (or on-line help for software) for the method you
choose.

• Use the Model 3500 or 3700 display

• Use a HART Communicator, ProLink or ProLink II software, or AMS
software

• Use the host controller

Enter the calibration factors that are listed on the flowmeter calibration
tag. (Calibration factors are also listed on the certificate that was
shipped with the meter.) If the calibration factors at the flowmeter are
already correct, the problem is not with the calibration factors.

Checking the damping value

Check or change the damping value at the transmitter. If necessary,
refer to the instruction manual (or on-line help for software) for the
method you choose.

• Use the Model 3500 or 3700 display

• Use a HART Communicator, ProLink software, or AMS software

• Use the host controller

In almost all applications, the damping value should be greater than or
equal to 0.8 seconds. If the damping value is already greater than or
equal to 0.8 seconds, the problem is probably not with the damping
value.

Damping values less than 0.8 seconds are used in very few applications.
After troubleshooting is complete, if you have a question about whether
your application might require a lower damping value, contact the Micro
Motion Customer Service Department. Phone numbers are listed on
page 41. The two most common applications affected by a damping
value that is too high are:

• Very short batching applications

• Very short-pass proving applications

Checking the drive gain

Contact Micro Motion to check the drive gain. Phone numbers are listed
on page 41.

If the transmitter is a Model 1700, 2700, 3500, or 3700, you can use the
display to view drive gain. For more information, refer to the manual that
is shipped with the transmitter.

Checking the density or temperature reading

View the flowmeter density or temperature measurement in any of
several ways:

• Use the transmitter display, if it has one

• Use a HART Communicator, ProLink or ProLink II software, or AMS
software

• Use the connected output device, if there is one

50 Micro Motion® Model D and DT Sensors Instruction Manual

Troubleshooting continued

External shield

(braided wire)

Cable jacket

Individual wire sets
with drain wires

• Use the host controller

If necessary, test the process fluid to confirm the flowmeter
measurement is correct.

Checking for RF or transient-voltage interference

Radio-frequency (RF) or transient-voltage interference can affect the
input or output signals at the transmitter. If you suspect interference, and
can eliminate the source, do so before checking the alternatives
described below.

Output wiring. Output wiring can be affected by interference. Make
sure output wiring from the transmitter is properly grounded in
accordance with the instructions in the transmitter manual. Also make
sure no wires remain exposed at either end of output wiring.

Flowmeter cable. If the flowmeter cable does not have an external
shield (see illustration, below), and is not installed in conduit, it could be
affected by interference. Also make sure no wires remain exposed at
either end of the flowmeter cable.

Troubleshooting at the sensor

Cross-section of externally shielded cable

The tables in the preceding sections refer you to this section for
instructions on troubleshooting at the sensor. To troubleshoot at the
sensor, you might need a digital multimeter (DMM) or similar device. For
some procedures, you might also need the transmitter manual.

Checking flowmeter grounding

The sensor can be grounded via the piping, as long as joints in the
pipeline are ground-bonded, or by means of a ground screw on the
sensor case. See illustration, below. Transmitter grounding is described
in the transmitter instruction manual.

If the sensor is not grounded via the piping, and if national standards are
not in effect, adhere to these guidelines to ground the sensor via the
junction box:

Micro Motion® Model D and DT Sensors Instruction Manual 51

• Use copper wire, 14 AWG (2,5 mm

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

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

2

) or larger wire size for grounding.

Troubleshooting continued

Other Model D

sensors

Model DT

sensors

Model D600

sensors

WARNING

Sensor grounding screw

For hazardous area installation in Europe, use standard EN 60079-14 as
a guideline if national standards are not in effect.

Checking for moisture in the core processor or sensor junction box

Note that the following will help reduce the risk of getting moisture in the
core processor or sensor junction box: If possible, install wiring with the
conduit openings pointed down to reduce the risk of condensation or
moisture in the housing. Otherwise, install drip legs on the cable or
conduit.

All wiring compartments must be sealed to prevent a short circuit. A
short would result in measurement error or flowmeter failure.

• The D600 has a junction box and a booster amplifier housing.

• Do not open the D600 booster amplifier housing while the booster
amplifier is energized. See the warning statement below.

• Replace all covers and seal all openings before applying power to a
D600 sensor.

Explosion Hazard

In a hazardous area:

• Do not open booster amplifier housing cover while
booster amplifier is energized.

• Wait at least 30 minutes after power is shut off before
opening.

52 Micro Motion® Model D and DT Sensors Instruction Manual

Troubleshooting continued

Open the junction box (and, for a D600, the booster amplifier housing) to
check for moisture. If moisture is present, dry out the junction box. Do
not use contact cleaner. Follow these guidelines to avoid risk of
condensation or excessive moisture from accumulating:

• Seal all conduit openings.

• Install drip legs in conduit or cable.

• If possible, install wiring with junction-box openings pointed down.

• Check integrity of gaskets.

• Close and fully seal all housing covers.

Checking for mounting stress on the sensor

Because each installation is unique, it is not possible to offer a definitive
solution for mounting problems. However, mounting stresses can be
caused by one or more of the following conditions:

• The pipeline is being supported by (hung from) the sensor.

• Misaligned piping was drawn together by the sensor.

• An unsupported pipeline is not sturdy enough to support the sensor.

If you are unable to determine whether the process connections are
being subjected to mounting stress, contact Micro Motion for additional
assistance. Phone numbers are listed on page 41.

Checking for vibration and crosstalk

Micro Motion sensors have been designed to minimize the effect of
vibration. In very rare cases, however, vibration or crosstalk can affect
flowmeter operation. Crosstalk is the transfer of resonant vibration from
one sensor to another, and sometimes occurs when two like-size
sensors are installed in close proximity to each other and are operating
on the same fluid for short periods of time.

Micro Motion meters are rarely affected by vibration, so vibration or
crosstalk is probably not the problem. If you are not sure whether
vibration or crosstalk is affecting the sensor, contact Micro Motion for
additional assistance. Phone numbers are listed on page 41.

Checking for 2-phase flow

Two-phase flow occurs when air or gas is present in a liquid process
stream, or when liquid is present in a gas process stream. Two-phase
flow has several causes, as described below.

Leaks. Leaks can occur at process connections, valve seals, and pump
seals, resulting in air being introduced into a liquid stream. Air might also
be drawn in at the system inlet. Check the system for leaks, and repair
any leaks that are found.

Cavitation and flashing. Cavitation and flashing are caused by
operating the system at or near the process fluid vapor pressure,
resulting in pockets of air or gas being introduced into the process fluid.
If the sensor is near a device that causes pressure drop, such as a
control valve, locating the sensor upstream from the device can
decrease the risk of flashing. Alternatively, increasing back pressure
downstream from the sensor can also reduce the risk of cavitation and
flashing.

Cascading. Cascading of the fluid can occur when the flow rate
diminishes to the point where the sensor tube is only partially filled.

Micro Motion® Model D and DT Sensors Instruction Manual 53

Troubleshooting continued

Often, this occurs because fluid is flowing downward through a sensor
installed in a vertical pipeline. (When a sensor is mounted this way, it is
called the flag-mount orientation).

To help eliminate cascading, fluids should flow upward through a flag­mounted sensor. Mounting the sensor in the preferred orientation often
reduces cascading. (See Orientation, page 13.) Increasing back
pressure downstream from the sensor can also reduce or eliminate
cascading.

High points in the system. When measuring liquids, entrained air
(pockets of non-condensable gas) can collect in high points of a fluid
system. If the fluid velocity is low, and/or the high points are very high
relative to the system, entrained air pockets can grow and persist. If the
air pocket releases and passes through the sensor, measurement error
could occur. One possible solution is to install vent valves or air
eliminators at a high point in the system, upstream from the sensor. Use
your common plant practices if you choose to install vent valves or air
eliminators.

Low points in the system. When measuring gases, liquid condensate
can collect in low points of a fluid system. If the fluid velocity is low,
and/or the low points are very low relative to the system, condensates
can accumulate and persist. If the liquid passes through the sensor,
measurement error could occur. One possible solution is to install
condensate valves at a low point in the system, upstream from the
sensor. Use your common plant practices if you choose to install
condensate valves.

Checking for plugging or build-up

If the process fluid tends to build up in the piping, the sensor can
become plugged or partially plugged due to build-up of material inside
the sensor flow tubes. To determine whether plugging or build-up has
occurred, check at the transmitter for a high drive gain and high density
reading (see page 50).

• If the drive gain and the density reading are both high, flush or clean
the sensor, then check for an accurate density reading on water (or
some other fluid with a known density). If the density is still wrong,
plugging of the tube is probably not the problem.

• If either the drive gain or the density reading is not high, plugging of the
tube is probably not the problem.

54 Micro Motion® Model D and DT Sensors Instruction Manual

Appendix

1/2" NPT female

purge fitting

Purge plug

Sensor case

Front

view

Side
view

A Purge Fittings

Keeping purge fittings sealed

If the sensor has purge fittings, they should remain sealed at all times.
After a purge plug is removed, the sensor case should be purged with a
dry, inert gas (such as argon or nitrogen), and resealed. See Case
purging procedure, page 56.

Purging the case protects internal components. Before Micro Motion
ships a sensor from the factory, it purges the sensor case. If you never
loosen or remove the fittings, you do not have to be concerned about
them.

For more information, contact the Micro Motion Customer Service
Department:

• In the U.S.A., phone [phone]-MASS (1-800-522-6277), 24 hours

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

• In Asia, phone [phone] (Singapore)

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

• Outside the U.K., phone [phone] (The Netherlands)

• Or visit our website at www.micromotion.com.

Purge fittings

Micro Motion® Model D and DT Sensors Instruction Manual 55

Purge Fittings continued

WARNING

CAUTION

Using purge fittings

Removing a purge plug

Case purging procedure

The primary reason for having purge fittings is to monitor pressure inside
the sensor case. Some users, such as those measuring highly volatile
fluids, install a pressure transmitter across the sensor purge fittings. A
control device, connected to the pressure transmitter, shuts down the
process if a change in pressure is detected. This provides additional
protection should a rupture occur inside the sensor.

If you remove a purge plug from the sensor case, it is necessary to
re-purge the case.

Removing a purge plug will require the sensor case to
be re-purged with a dry inert gas. Improper
pressurization could result in serious personal injury.

Follow all instructions for re-purging the sensor case. See
Case purging procedure, below.

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.

56 Micro Motion® Model D and DT Sensors Instruction Manual

Purge Fittings continued

3. Connect the supply of dry, inert 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.

4. 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.

5. 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 the table below. If purge lines are being used,
increase the purge time to fill the additional volume of the purge line.

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

Time required to purge Model D sensor cases

Sensor model

D25 20 (566) 3
D38 20 (566) 3
D40 20 (566) 3
D65 20 (566) 10
D100 20 (566) 15
D150 20 (566) 15
D300 40 (1132) 30
D600 80 (2264) 60

* If purge lines are being used, increase purge time to fill the additional volume.

Purge rate

cubic ft/hr (l/hr)

Time*

minutes

Micro Motion® Model D and DT Sensors Instruction Manual 57

58 Micro Motion® Model D and DT Sensors Instruction Manual

Appendix

WARNING

Rupture disk

assembly

Sensor
case

B Rupture Disk

Using the rupture disk

The primary reason for having a rupture disk is to vent process fluid from
inside the sensor case, should the sensor flow tube rupture in a high­pressure application. Some users, such as those measuring high­pressure gases, install a pipeline at the rupture disk fitting, to help
contain escaping process fluid. This provides additional protection
should a rupture occur.

Pressure Relief Zone.

Escaping high-pressure fluid can cause severe injury
or death.

Stay clear of rupture disk pressure-relief area.

For more information, contact the Micro Motion Customer Service
Department:

• In the U.S.A., phone [phone]-MASS (1-800-522-6277), 24 hours

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

• In Asia, phone [phone] (Singapore)

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

• Outside the U.K., phone [phone] (The Netherlands)

• Or visit our website at www.micromotion.com.

Rupture disk

Micro Motion® Model D and DT Sensors Instruction Manual 59

60 Micro Motion® Model D and DT Sensors Instruction Manual

Appendix

CAUTION: Removal of plugs will require sensor case to
be repurged with a dry inert gas.

!

WARNING: Improper pressurization may result in

injury. Refer to sensor manual for repurging instructions.

Part No. 1003972, Rev. B

D sensor with
purge fittings

Part No. 1004570

CAUTION

Do not step
or place weight on case.

Precision instrument
enclosed.

C Label Maintenance and

Replacement

Maintaining and replacing labels

Label number 1003972

Micro Motion product safety labels have been designed in accordance
with the voluntary standard, ANSI Z535.4. If any of the labels illustrated
below is illegible, damaged, or missing, promptly have a new one
installed. The sensor includes the safety labels illustrated below.

Contact Micro Motion for replacement labels:

• In the U.S.A., phone [phone]-MASS (1-800-522-6277), 24 hours

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

• In Asia, phone [phone] (Singapore)

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

• Outside the U.K., phone [phone] (The Netherlands)

• Or visit our website at www.micromotion.com.

For additional information, see Removing a purge plug and Case
purging procedure, page 56.

Label number 1004570

Micro Motion® Model D and DT Sensors Instruction Manual 61

Label Maintenance and Replacement continued

P/N 1004134 Rev. A

WARNING

Pressure Relief Zone.
Escaping pressure
can cause
severe injury or death.

Stay clear of vent.

D sensor with
rupture disk

(label inside core processor housing)

Label number 1004134

For additional information, see Appendix B, page 59.

Label number 3600460

Label number 3005784

62 Micro Motion® Model D and DT Sensors Instruction Manual

Label Maintenance and Replacement continued

Label number 3100436

Micro Motion® Model D and DT Sensors Instruction Manual 63

64 Micro Motion® Model D and DT Sensors Instruction Manual

Appendix

D Return Policy

General guidelines

New and unused equipment

Used equipment

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.

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.

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.

Micro Motion® Model D and DT Sensors Instruction Manual 65

66 Micro Motion® Model D and DT Sensors Instruction Manual

Index

A

Air eliminators 54
AMS software 41, 46
Approvals tag

keys for sensor location

B

Batch total

inaccurate batch total

9

44

Before you begin 1–7

additional information 7
installation process 6
your new sensor 1

Booster amplifier

sensor location

C

Cable

10

. See also Flowmeter cable; Wiring
DT sensor 10
glands 29

Calibration

certificate

50

startup 39

troubleshooting 49
Cascading 53
Cavitation 53
Certificate of conformance 50
Characterization 39
Condensate valves 54
Configuration 39
Coriolis flowmeter 1
Crosstalk 53
Customer service 40

D

Damping 50
Density

checking

50

inaccurate density reading 45
DMM 41, 46
Drive gain 50

E

Entrained air or gas 53–54
European installations 2

F

Fieldbus host 46
Flashing 53
Flow direction 13
Flow direction arrow

sensor orientation

13

Flow rate

erratic flow rate

43

inaccurate flow rate 44

Flowmeter

cable

. See also Wiring
RF interference

51

troubleshooting 47–49
components of 1
grounding 28

troubleshooting 51
startup 39
zeroing 39

G

Grounding

troubleshooting

51

wiring 28

H

HART Communicator

troubleshooting with

46

Hazardous area installations

sensor location

11

wiring 19

I

Installation

step 2: orientation

13

step 3: mounting 17
step 4: wiring 19, 22–36
step 5: startup 39

Installation process 6

J

Junction box

troubleshooting

K

Keys for installation

sensor location

52

9

sensor mounting 17
sensor orientation 13

L

Labels 61
Location

booster amplifier

10

D600 10
DT sensor junction box 10
hazardous area installations 11
keys for installation 9
pipe run 9

M

Modbus

troubleshooting with

46

Mounting 17

D600 optional mounting 18
DT sensors 18
keys for installation 17

O

Micro Motion® Model D and DT Sensors Instruction Manual 67

Index continued

Orientation 13

flow direction 13
flow direction arrow 13
keys for installation 13
process fluids 13
vertical pipeline 13

P

Pipe run 9
Plugging 54
Process fluid

flow direction

13

sensor orientation 13

ProLink software 41, 46
Purge fittings

instructions

R

Resistance ranges for flowmeter circuits 48–49

55–57

Return policy 65
RF interference 51
Rupture disk 59

S

Sensor

booster amplifier

location 10
components 2–6
grounding 28
labels 61
mounting 17
orientation 13
purge fittings 55–57
rupture disk 59
startup 39
troubleshooting 41
wiring 19, 22–32, 36

Startup 39

configuration, calibration, and characterization 39
customer service 40
zeroing 39

T

Temperature

checking

50

inaccurate temperature reading 46

Transmitter

compatible models

1

Troubleshooting 41

air eliminators 54
AMS software 41, 46
at the sensor 51
at the transmitter 46–51
cascading 53
cavitation 53

checking

calibration factors

49

crosstalk 53
damping value 50
density reading 50
drive gain 50
faulty flowmeter wiring 47–49
faulty output wiring 47
grounding 51
junction box 52
mounting stress 53
plugging 54
RF interference 51
temperature reading 50
2-phase flow 53

vibration 53
condensate valves 54
customer service 41
DMM 41, 46
Fieldbus host 46
flashing 53
general information 41
HART Communicator 46
high points in system 54
low points in system 54
procedures

erratic flow rate

43

inaccurate batch total 44

inaccurate density reading 45

inaccurate flow rate 44

inaccurate temperature reading 46

zero drift 42
ProLink software 41, 46
RF interference 51
vent valves 54
wiring

resistance ranges

V

Vent valves 54

W

Wiring 19, 22–36

48–49

connections to transmitter 21–24, 29–32
D600 sensor 24
grounding 28
hazardous area installations 19
transmitter

1700 or 2700 to Model D or DT sensor
troubleshooting 47–49

grounding 51

output wiring 51

RF interference 51

Z

Zero drift 42
Zeroing

flowmeter startup

39

keys for sensor location 9

24

68 Micro Motion® Model D and DT Sensors Instruction Manual

©2 008, Micro Motion, Inc. All righ ts reserved. P/N 1005172, Rev. C

*1005172*

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

Micro Motion Inc. USA

Worldwide Headquarters

7070 Winchester Circle
Boulder, Colorado 80301
T [phone]

[phone]

F [phone]

Micro Motion Europe

Emerson Process Management
Neonstraat 1
6718 WX Ede
The Netherlands
T [phone]
F [phone]

Micro Motion United Kingdom

Emerson Process Management Limited
Horsfield Way
Bredbury Industrial Estate
Stockport SK6 2SU U.K.
T [phone]
F [phone]

Micro Motion Asia

Emerson Process Management
1 Pandan Crescent
Singapore 128461
Republic of Singapore
T [phone]
F [phone]

Micro Motion Japan

Emerson Process Management
1-2-5, Higashi Shinagawa
Shinagawa-ku
Tokyo 140-0002 Japan
T [phone]
F [phone]