Micro Motion Fork Viscosity Meters Installation Manual

Micro Motion® Fork Viscosity Meters

Direct insertion viscosity meter installation

Installation Manual

MMI-20020994, Rev AC

June 2016

Safety and approval information

This Micro Motion product complies with all applicable European directives when properly installed in accordance with the
instructions in this manual. Refer to the 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 or through your local Micro Motion support center.

Information affixed to equipment that complies with the Pressure Equipment Directive can be found on the internet at

www.micromotion.com/documentation.

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

Other information

Full product specifications can be found in the product data sheet. Troubleshooting information can be found in the transmitter
configuration manual. Product data sheets and manuals are available from the Micro Motion web site at

www.micromotion.com/documentation.

Return policy

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

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

Emerson Flow customer service

Email:

• Worldwide: [e-mail]

• Asia-Pacific: [e-mail]

Telephone:

North and South America Europe and Middle East Asia Pacific

United States 800-522-6277 U.K. 0870 240 1978 Australia 800 158 727

Canada [phone] The Netherlands [phone] New Zealand 099 128 804

Mexico [phone] France 0800 917 901 India 800 440 1468

Argentina [phone] Germany 0800 182 5347 Pakistan 888 550 2682

Brazil [phone] Italy 8008 77334 China [phone]

Venezuela [phone] Central & Eastern [phone] Japan [phone]

Russia/CIS [phone] South Korea [phone]

Egypt 0800 000 0015 Singapore [phone]

Oman 800 70101 Thailand 001 800 441 6426

Qatar 431 0044 Malaysia 800 814 008

Kuwait 663 299 01

South Africa 800 991 390

Saudi Arabia 800 844 9564

UAE 800 0444 0684

Contents

Contents

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

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

1.2 Best practices .................................................................................................................................2

1.3 Power requirements .......................................................................................................................2

1.4 Other installation considerations ....................................................................................................4

1.5 Recommended installations for short-stem meters ........................................................................6

1.6 Perform a pre-installation meter check ...........................................................................................7

Chapter 2 Mounting .........................................................................................................................9

2.1 Mount in free-stream application (flanged fitting) ..........................................................................9

2.2 Mount in free-stream application (weldolet fitting) ...................................................................... 10

2.3 Mount with a T-piece (flanged fitting) .......................................................................................... 11

2.4 Mount with a flow-through chamber ............................................................................................13

2.5 Mount in an open tank (long-stem meter) ....................................................................................14

2.6 Mount in a closed tank (long-stem meter) ....................................................................................17

2.7 Attach the PFA ring and circlip ......................................................................................................21

2.8 Rotate the electronics on the meter (optional) .............................................................................22

2.9 Rotate the display on the transmitter (optional) ...........................................................................23

Chapter 3 Wiring ........................................................................................................................... 25

3.1 Terminals and wiring requirements .............................................................................................. 25

3.2 Explosion-proof/flameproof or non-hazardous output wiring .......................................................26

3.3 Processor wiring for remote-mount 2700 FOUNDATION™ fieldbus option ....................................30

3.4 Wiring to external devices (HART multidrop) ................................................................................35

3.5 Wiring to signal converters and/or flow computers ...................................................................... 37

Chapter 4 Grounding ......................................................................................................................39

Installation Manual i

Contents

ii Micro Motion Fork Viscosity Meter

1 Planning

Topics covered in this chapter:

• Installation checklist

• Best practices

• Power requirements

• Other installation considerations

• Recommended installations for short-stem meters

• Perform a pre-installation meter check

1.1 Installation checklist

Verify the contents of the product shipment to confirm that you have all parts and

□

information necessary for the installation.

Verify that the meter calibration-type code corresponds to the pipe size. If it does

□

not, measurement accuracy may be reduced due to the boundary effect.

Make sure that all electrical safety requirements are met for the environment in

□

which the meter will be installed.

Make sure that the local ambient and process temperatures and process pressure

□

are within the limits of the meter.

Make sure that the hazardous area specified on the approval tag is suitable for the

□

environment in which the meter will be installed.

Make sure that you will have adequate access to the meter for verification and

□

maintenance.

Verify that you have all equipment necessary for your installation. Depending on

□

your application, you may be required to install additional parts for optimal
performance of the meter.

If your meter will be wired to a remote-mount 2700 FOUNDATION™ fieldbus

□

transmitter:

- Refer to the instructions in this manual for preparing the 4-wire cable and wiring

to the processor connections.

- Refer to the instructions in the transmitter installation manual for mounting and

wiring the 2700 FOUNDATION ™ fieldbus transmitter. See Micro Motion

Model 1700 and Model 2700 Transmitters: Installation ManualMicro Motion K-Series
Meters: Quick Start Guide.

- Consider the maximum cable length between the meter and transmitter. The

maximum recommended distance between the two devices is 1000 ft (300 m).
Micro Motion recommends using Micro Motion cable.

Planning

Installation Manual 1

Planning

1.2 Best practices

The following information can help you get the most from your meter.

• Handle the meter with care. Follow local practices for lifting or moving the meter.

• Perform a Known Density Verification (KDV) check of the meter prior to installing

the meter.

• For the PFA-coated tines, always fit the protective cover over the tines when the

meter is not in use. The tine coating is not resistant to impact damage.

• Always store and transport the meter in its original packaging. For the long-stem

meters, be sure to include the transit cover secured by the grub screws.

• Do not use liquids that are incompatible with the materials of construction.

• Do not expose the meter to excessive vibration (greater than 0.5 g continuously).

Vibration levels in excess of 0.5 g can affect the meter accuracy.

• For optimal performance of the meter, ensure that operating conditions correspond

to the meter calibration-type code and boundary.

• Ensure that all piping connections conform to the local and national regulations and

codes of practice.

• Properly tighten the transmitter housing cover after wiring to maintain ingress

protection and hazardous area approvals.

• After installation, pressure test the meter and the associated pipework to 1½ times

the maximum operating pressure.

• Install thermal insulation in the meter, the inlet, and the bypass-loop pipeline to

maintain stable temperatures. The thermal insulation should cover the process
connection.

1.3 Power requirements

Following are the DC power requirements to operate the meter:

• 24 VDC, 0.65 W typical, 1.1 W maximum

• Minimum recommended voltage: 21.6 VDC with 1000 ft of 24 AWG (300 m of

0.20 mm2) power-supply cable

• At startup, power source must provide a minimum of 0.5 A of short-term current at

a minimum of 19.6 V at the power-input terminals.

2 Micro Motion Fork Viscosity Meter

Power cable recommendations for explosion-proof/flameproof meters

300ft 600ft 900ft 1200ft 1500ft 1800ft 2100ft 2400ft 2700ft 3000ft

B

2 1 . 6V
24 V

14

15

16

17

18

19

20

21

22

23

24

25

26

A

91.44m 182.88m 274.32m 365.76m 457.2m 548.64m 640.08m 731.52m 822.96m 914.4m

0 . 00 0

0.100

0.200

0.300

0.400

0.500

0.600

0.700

10 0m 20 0m 30 0m 40 0m 50 0m 60 0m 70 0m 80 0m 90 0m 100 0m

B

2 1 . 6V
24 V

A

328.084 ft 656.168ft 984.253ft 1312.34ft 1640.42ft 1968.5ft 2296.59ft 2624.67ft 2952.76ft 3280.84ft

Minimum wire gauge (AWG per foot or meter)Figure 1-1:

Planning

A. AWG maximum
B. Distance of installation

Minimum wire area (mm2 per meter or foot)Figure 1-2:

Installation Manual 3

A. Minimum wire area (mm2)
B. Distance of installation

A

STATUS

SCROLL SELECT

Planning

1.4 Other installation considerations

Numerous external factors can affect the meter's successful operation. To ensure that your
system works correctly, consider the factors covered in this section when designing your
installation.

1.4.1 Boundary effect

Boundary effect refers to the distortion in the wave forms in the process fluid that are caused by reflections from the pipe wall. If the pipe wall is within the meter's effective measurement region, the boundary effect produces measurement inaccuracy.

Region of measurement boundary or sensitivity (plan view)Figure 1-3:

A. Sensitive, or effective, region

The factory calibration compensates for the boundary effect. The meter can be calibrated
for 2-inch, 2.5-inch, or 3-inch pipe. If the meter is installed in a pipe that does not match
the calibration size, the compensation will be inaccurate, and process measurement will
be inaccurate.

Verify that the meter was calibrated for the pipe size you plan to use.

4 Micro Motion Fork Viscosity Meter

1.4.2 Flow rates

Maintain constant flow rates and velocities that are within the limits specified for the
meter. The fluid flow provides a steady heat flow into the meter installation, and the flow
rate influences the self-cleaning of the meter tines, the dissipation of bubbles, and the
solid contaminants around the meter.

If you install the meter in a bypass configuration (such as in a flow-through chamber), use a
pressure drop, pitot scoop, or a sample pump to maintain flow. When using a sample
pump, place the pump upstream from the meter.

1.4.3 Entrained gas

Entrained gas, or gas pockets, can disrupt the measurement of a fluid. A brief disruption in
the signal caused by transient gas pockets can be corrected in the meter configuration,
but you must avoid more frequent disruptions or serious gas entrainment to ensure
accurate and reliable fluid measurement.

To minimize the possibility of entrained gas:

• Keep pipelines full of fluid at all times.

• Vent any gas prior to the meter installation location.

• Avoid sudden pressure drops or temperature changes that may cause dissolved

gases to break out of the fluid.

• Maintain a back pressure on the system that is sufficient to prevent gas breakout.

• Maintain flow velocity at the sensor within the specified limits.

Planning

1.4.4 Solid contamination

To avoid issues related to solids contamination:

• Avoid sudden changes of the fluid velocity that may cause sedimentation.

• Install the meter far enough downstream from any pipework configuration that may

cause centrifuging of solids (such as at a pipe bend).

• Maintain flow velocity at the meter installation that is within the specified limits.

• Use filtration in your process, if necessary.

1.4.5 Temperature gradients and insulation

For high-viscosity fluids, minimize any temperature gradients in the fluid, and in the piping
and fittings immediately upstream and downstream of the meter. Minimizing
temperature gradients reduces the effect of viscosity changes. Micro Motion recommends
using the following guidelines to reduce the thermal effects to your meter installation:

• Always insulate the meter and surrounding pipework thoroughly.

- Avoid insulating the transmitter housing.

- Use rock wool or any equivalent heat jacket material that is at least 1 inch (25

mm) thick, but preferably 2 inches (50 mm) thick.

Installation Manual 5

Planning

- Enclose insulation in a sealed protective casing to prevent moisture ingress, air

circulation, and crushing of the insulation.

- For flow-through chamber installations, use the special insulation jacket

provided by Micro Motion.

• Avoid direct heat or cold on the meter or on the associated upstream or

downstream pipe work that is likely to create temperature gradients.

• If it is necessary to protect against cooling because of flow loss, you can apply

electrical-trace heating. If you use electrical-trace heating, use a thermostat that
operates below the minimum operating temperature of the system.

1.5 Recommended installations for short-stem meters

Micro Motion recommends three standard installations for the short-stem meter to
alleviate any need for onsite calibration. All meters are factory calibrated for these types of
installations and take into consideration the potential boundary effect of each installation.

Table 1-1 highlights these different installations according to specific conditions or

requirements that may exist for your process environment.

Standard installation types: short-stem metersTable 1-1:

Flow-through

Installation type: Free stream T-Piece

Meter placement Meter tines are

inserted directly into
the main fluid flow.

The meter must always
be installed
horizontally and
oriented so that the
gap between the tines
is vertical.

Flow rate 0.3 to 0.5 m/s (at the

meter)

Viscosity Up to 500 cP Up to 100 cP (250 cP in

Temperature –50 °C to 200 °C (–58

°F to 392 °F)

Meter tines are
contained in a side
pocket off the main
flow.

The meter must always
be installed
horizontally and
oriented so that the
gap between the tines
is vertical.

0.5 to 3 m/s (at main
pipe wall)

some cases)

–50 °C to 200 °C (–58
°F to 392 °F)

chamber

Meter tines are
contained in a flow­through chamber in
which fluid is
circulated from the
main flow.

10 to 30 l/min

Up to 500 cP

–50 °C to 200 °C (–58
°F to 392 °F)

6 Micro Motion Fork Viscosity Meter

Standard installation types: short-stem meters (continued)Table 1-1:

Installation type: Free stream T-Piece

Main flow pipe size • Horizontal pipe:

minimum
diameter, 100 mm
(4 inch)

• Vertical pipe:

minimum
diameter, 150 mm
(6 inch)

Advantages • Simple installation

in large bore pipes

• Ideal for clean

fluids and non­waxing oils

• Suitable for line

viscosity
measurement and
simple referrals

Recommendations Do not use with:

• Dirty fluids

• Low or unstable

flow rates

• Where step

changes in
viscosity can occur

• For small bore

pipes

Minimum diameter, 50
mm (2 inch)

• Simple installation

in large bore pipes

• Ideal for clean

fluids and non­waxing oils

• Suitable for line

viscosity
measurement and
simple referrals

Do not use with:

• Dirty fluids

• Low or unstable

flow rates

• Where step

changes in
viscosity can occur

• For small bore

pipes

• Where

temperature
effects are
significant

Planning

Flow-through
chamber

Suitable for all sizes, if
mounted in a bypass
(slipstream)
configuration

• Adaptable

installation to any
diameter main
pipe and for tank
applications

• Ideal for flow and

temperature
conditioning

• Suitable for

complex referrals
and for use with
heat exchangers

• Suitable for step

changes in
viscosity

• Fast response

• Ideal for analyzer

cubicles

• Do not use with

uncontrolled flow
rates.

• Careful system

design is required
to ensure
representative
measurement.

• Frequently requires

the use of a pump.

1.6 Perform a pre-installation meter check

1. Remove the meter from the box.

Installation Manual 7

Planning

CAUTION!

Handle the meter with care. Follow all corporate, local, and national safety regulations
for lifting and moving the meter.

2. Visually inspect the meter for any physical damage.

If you notice any physical damage to the meter, immediately contact Micro Motion
Customer Support at [e-mail].

3. Position and secure the meter in a vertical position with the flow arrow pointing
upward.

4. Connect the power wiring, and power up the meter.

Remove the back transmitter housing cover to access the PWR terminals.

Power supply wiring terminalsFigure 1-4:

A. 24 VDC

5. Perform a Known Density Verification (KDV) check.

Use the Known Density Verification procedure to match the current meter
calibration with the factory calibration. If the meter passes the test, then it has not
drifted or changed during shipment.

For more information on performing a KDV check, see the configuration and use
manual that shipped with the product.

8 Micro Motion Fork Viscosity Meter

2 Mounting

Topics covered in this chapter:

• Mount in free-stream application (flanged fitting)

• Mount in free-stream application (weldolet fitting)

• Mount with a T-piece (flanged fitting)

• Mount with a flow-through chamber

• Mount in an open tank (long-stem meter)

• Mount in a closed tank (long-stem meter)

• Attach the PFA ring and circlip

• Rotate the electronics on the meter (optional)

• Rotate the display on the transmitter (optional)

Mounting

2.1 Mount in free-stream application (flanged
fitting)

Prerequisites

Free-stream (flanged) installations are recommended for processes with the following
conditions:

Flow 0.3 to 0.5 m/s (at the meter)

Viscosity 0.5 to 12,500 cP

Temperature -50 °C to 200 °C (–58 °F to 392 °F)

-40 °C to 200 °C (-40 °F to 392 °F) in hazardous
areas

Procedure

See Figure 2-1 for information on installing the meter (with a flanged fitting) in a free­stream application.

Important

Always install the meter horizontally and oriented so that the gap between the tines is vertical. This
position helps to prevent the trapping of bubbles or solids on the meter – allowing the solids to sink
and the bubbles to rise. You can use the scribe mark on the spigot (located between the flange and
transmitter) as a reference for the tine orientation. Always orient the meter so the scribe mark is at
either the 12 o’clock or 6 o’clock position.

Installation Manual 9

B

A

STATUS

SCROLL SELECT

Plan view of a vertical pipe installation

Mounting

Free-stream (flanged fitting) meter installationFigure 2-1:

A. 4-inch pipe for horizontal installations; 6-inch (152 mm) pipe for vertical installations
B. Size the recess mount so that the meter tines are inserted fully into the liquid [approximately 2.75 in

(70 mm)].

2.2 Mount in free-stream application (weldolet fitting)

The weldolet for free-stream installations has a 1.5-inch taper lock fitting and is supplied to
be welded on 4-inch, 6-inch, 8-inch or 10-inch pipelines. A weldolet installation ensures
that the tines of the meter are oriented correctly and are fully inserted into the fluid
stream.

Prerequisites

• Free-stream (weldolet) installations are recommended for processes with the

following conditions:

Flow 0.3 to 0.5 m/s (at the meter)

Viscosity 0.5 to 12,500 cP

Temperature –50 °C to 200 °C (–58 °F to 392 °F)

–40 °C to 200 °C (–40 °F to 392 °F) in
hazardous areas

Note

If temperature variations are a critical factor in your process, the reduced thermal mass of the
taper-lock fitting of the weldolet can track changes in temperature more efficiently.

• Before fitting the weldolet, you must bore a 2.1 in (52.5 mm) diameter opening in

the pipeline to accept the meter. You must weld the weldolet to the pipeline
concentrically with the pre-bored hole.

10 Micro Motion Fork Viscosity Meter

STATUS

SCROLL SELECT

A

C

D

B

Plan view of a vertical pipe installation

Mounting

Procedure

See Figure 2-2 for information on installing the meter (with a weldolet fitting) in a free­stream application.

Important

Always install the meter horizontally and oriented so that the gap between the tines is vertical. This
position helps to prevent the trapping of bubbles or solids on the meter – allowing the solids to sink
and the bubbles to rise. You can use the scribe mark on the spigot (located between the flange and
transmitter) as a reference for the tine orientation. Always orient the meter so the scribe mark is at
either the 12 o’clock or 6 o’clock position.

Free-stream (weldolet fitting) meter installationFigure 2-2:

A. 4-inch pipe for horizontal installations; 6-inch (152 mm) pipe for vertical installations
B. 2.1 in (52.5 mm) meter opening in pipeline
C. Weld
D. Free-stream weldolet (purchased to fit pipe diameter)

2.3 Mount with a T-piece (flanged fitting)

Prerequisites

• T-piece (flanged) installations are recommended for processes with the following

conditions:

Flow 0.5 to 3 m/s (at the pipe wall)

Viscosity 0.5 to 100 cP

Temperature - -50 °C to 200 °C (–58 °F to 392 °F)

- -40 °C to 200 °C (-40 °F to 392 °F) in

hazardous areas

Installation Manual 11

STATUS

SCROLL SELECT

B

A

C

Plan view of a vertical pipe installation

Mounting

Note

- Flow velocity at the pipe wall and fluid viscosity must be within the limits shown to ensure

that the fluid within the pocket is refreshed in a timely manner. This installation will not
respond as rapidly as the free-stream installation to step changes in viscosity.

- The thermal mass of the flanges may affect the response time of the meter to

temperature changes.

• Attach the PFA ring and circlip to the underside of the meter flange before installing

the meter in your application (see Section 2.7).

Procedure

See Figure 2-3 for information on installing the meter (with a flanged fitting) in a T-piece.

Size the T-piece so that the meter tines are retracted 1 in (25 mm) from the main pipe wall.
For higher flow rates, increase this by 0.4 in (10 mm) for every 1 m/s increase in the main
flow rate.

Important

Always install the meter horizontally and oriented so that the gap between the tines is vertical. This
position helps to prevent the trapping of bubbles or solids on the meter – allowing the solids to sink
and the bubbles to rise. You can use the scribe mark on the spigot (located between the flange and
transmitter) as a reference for the tine orientation. Always orient the meter so the scribe mark is at
either the 12 o’clock or 6 o’clock position.

T-piece (flanged fitting) meter installationFigure 2-3:

A. 4-inch pipe or larger for horizontal or vertical installations
B. Distance of meter tines from main pipe wall is determined by the maximum flow rate of the process.
C. PFA ring and circlip

12 Micro Motion Fork Viscosity Meter

2.4 Mount with a flow-through chamber

Flow-through chambers are manufactured by Micro Motion, and are available with either
of the following:

• Welded ends or compression fittings that connect into the process pipelines

• 1- inch, 2-inch, or 3-inch inlet and outlet pipes

Important

Do not alter the length of the inlet and outlet pipes. Pipe alterations can adversely affect the fitting
temperature response and stability.

Prerequisites

Verify the following conditions:

Flow • 5–40 l/min for 2-inch Schedule 40 calibration bore section (1.5 - 10.5

gal/min)

• 5–300 l/min for 3-inch Schedule 80 calibration bore section (1.5 - 80

gal/min)

Viscosity 0.5 to 100 cSt

Temperature –50 °C to 200 °C (–58 °F to 392 °F)

–40 °C to 200 °C (–40 °F to 392 °F) in hazardous areas

Pressure 70 bar @ 204 °C, subject to process connections

Mounting

Important

• To ensure that the fluid within the pocket is refreshed in a timely manner, verify that flow

velocity at the pipe wall and fluid viscosity are within the limits described in this table.

• The thermal mass of the flanges may affect the response time of the meter to temperature

changes.

Procedure

See Figure 2-4 for an example installation of a meter in a flow-through chamber.

Installation Manual 13

A

Mounting

Flow-through chamber meter installationFigure 2-4:

A. Optional temperature port

Note

• This flow-through chamber is a direct-insertion type chamber that does not have a thermowell, and

uses a ¾-inch Swagelok connection.

• The three compression fittings on the flow pockets (½-inch drain, ¾-inch temperature probe, and 1-½-

inch mounting nut for the meter) are rated to above the working pressure of the flow pocket. The
fittings may be Swagelok or Parker.

2.5 Mount in an open tank (long-stem meter)

CAUTION!

Only the safe area version of the long-stem meter can be mounted in an open tank.

Procedure

1. Clamp the long-stem meter to a structure, positioning the clamp to determine the
insertion depth of the meter.

14 Micro Motion Fork Viscosity Meter

B

A

A

B

Mounting

Open-tank meter installation (long stem)Figure 2-5:

2. Confirm the meter tines are away from the tank wall.

Meter placement (away from tank wall)Figure 2-6:

A. 50 mm
B. 200 mm

3. Confirm the meter tines are immersed in fluid.

Installation Manual 15

AA

Mounting

Meter placement (immersed in fluid)Figure 2-7:

4. Confirm the meter tines are placed away from objects and disturbed flow.

Meter placement (distance from objects and disturbed flow)Figure 2-8:

A. 200 mm

5. If flow exists, confirm the meter tines are aligned so that the flow is directed towards
or through the gap between the tines.

Meter placement (flow direction through tine gap)Figure 2-9:

16 Micro Motion Fork Viscosity Meter

6. Confirm the meter tines are kept away from deposit buildup.

Meter placement (away from deposit buildup)Figure 2-10:

Mounting

2.6 Mount in a closed tank (long-stem meter)

1. Attach the long-stem meter using the fitted flange attachment (shipped with the
product).

Installation Manual 17

Mounting

Closed-tank installation (fitted flange attachment)Figure 2-11:

2. (Optional) To vary the insertion depth of the meter, mount the meter on a standoff
section that attaches to the flange (not provided).

18 Micro Motion Fork Viscosity Meter

B

A

A

B

Mounting

Closed-tank installation (with standoff)Figure 2-12:

A. Standoff height can vary (provided by customer)

3. Confirm the meter tines are away from the tank wall.

Meter placement (away from tank wall)Figure 2-13:

A. 200 mm
B. 50 mm

4. Confirm the meter tines are immersed in fluid.

Installation Manual 19

A

A

AA

Mounting

Meter placement (immersed in fluid)Figure 2-14:

5. Confirm the meter placement has allowed for the flexing of the tank lid to prevent
the meter from being pushed towards a tank wall or into the path of disturbed flow.

Meter placement (allowance for tank lid flexing)Figure 2-15:

A. 200 mm

6. Confirm the meter tines are placed away from objects and disturbed flow.

Meter placement (distance from objects and disturbed flow)Figure 2-16:

A. 200 mm

7. If flow exists, confirm the meter tines are aligned so that the flow is directed towards
or through the gap between the tines.

20 Micro Motion Fork Viscosity Meter

Meter placement (flow direction through tine gap)Figure 2-17:

8. Confirm the meter tines are kept away from deposit buildup.

Mounting

Meter placement (away from deposit buildup)Figure 2-18:

2.7 Attach the PFA ring and circlip

You attach the PFA ring (and circlip) around the boss on the underside of the meter flange
to center the meter tines within a 2-inch Schedule 40 or 80 pipe. The circlip holds the ring
in place.

Note

If you are using the Zirconium version of the meter, a self-locking PFA ring is provided and does not
require a circlip to keep it in place.

Installation Manual 21

B

A

C

A

Mounting

Procedure

See Figure 2-19 for information on attaching the PFA ring and circlip to the meter.

Attaching a PFA ring and circlipFigure 2-19:

A. Circlip (not provided with self-locking PFA rings)
B. PFA ring
C. PFA ring and circlip attached

2.8 Rotate the electronics on the meter (optional)

You can rotate the transmitter on the meter up to 90°.

1. Using a 4 mm hex key, loosen the cap screw that holds the transmitter in place.

Component to secure transmitter in placeFigure 2-20:

A. M5 socket-head cap screw

22 Micro Motion Fork Viscosity Meter

2. Rotate the transmitter clockwise to the desired orientation up to 90°.

B

C

D

A

D

E

3. Secure the cap screw in place and tighten to 60 lb·in (6.8 N·m).

2.9 Rotate the display on the transmitter (optional)

The display on the transmitter electronics module can be rotated 90° or 180° from the
original position.

Display componentsFigure 2-21:

Mounting

A. Transmitter housing
B. Sub-bezel
C. Display module
D. Display screws
E. Display cover

Procedure

1. If the meter is powered up, power it down.

2. Turn the display cover counterclockwise to remove it from the main enclosure.

3. Carefully loosen (and remove if necessary) the semi-captive display screws while

holding the display module in place.

4. Carefully pull the display module out of the main enclosure until the sub-bezel pin

terminals are disengaged from the display module.

Note

If the display pins come out of the board stack with the display module, remove the pins and
reinstall them.

Installation Manual 23

Mounting

5. Rotate the display module to the desired position.

6. Insert the sub-bezel pin terminals into the display module pin holes to secure the

display in its new position.

7. If you have removed the display screws, line them up with the matching holes on the

sub-bezel, then reinsert and tighten them.

8. Place the display cover onto the main enclosure.

9. Turn the display cover clockwise until it is snug.

10. If appropriate, power up the meter.

24 Micro Motion Fork Viscosity Meter

3 Wiring

Topics covered in this chapter:

• Terminals and wiring requirements

• Explosion-proof/flameproof or non-hazardous output wiring

• Processor wiring for remote-mount 2700 FOUNDATION™ fieldbus option

• Wiring to external devices (HART multidrop)

• Wiring to signal converters and/or flow computers

3.1 Terminals and wiring requirements

Three pairs of wiring terminals are available for transmitter outputs. These outputs vary
depending on your transmitter output option ordered. The Analog (mA), Time Period
Signal (TPS), and Discrete (DO) outputs require external power, and must be connected to
an independent 24 VDC power supply.

Wiring

The screw connectors for each output terminal accept a maximum wire size of 14 AWG
(2.5 mm2).

Important

• Output wiring requirements depend on whether the meter will be installed in a safe area or a

hazardous area. It is your responsibility to verify that this installation meets all corporate,
local, and national safety requirements and electrical codes.

• If you will configure the meter to poll an external temperature or pressure device, you must

wire the mA output to support HART communications. You may use either HART/mA single­loop wiring or HART multi-drop wiring.

Transmitter outputsTable 3-1:

Output channels

Transmitter version

Analog 4–20 mA + HART 4–20 mA Modbus/RS-485

Discrete 4–20 mA + HART Discrete output Modbus/RS-485

A B C

Installation Manual 25

Wiring

3.2 Explosion-proof/flameproof or non-hazardous output wiring

3.2.1 Wire the Analog outputs version in an explosion-proof/ flameproof or non-hazardous area

CAUTION!

Meter installation and wiring should be performed by suitably trained personnel only in
accordance with the applicable code of practice.

Procedure

Wire to the appropriate output terminal and pins (see Figure 3-1).

26 Micro Motion Fork Viscosity Meter

mA1+
HART

RS-485

PWR

mA2

AA
B

RS-485 A

RS-485 B

C

D

B

B

A

A

A

Wiring

Wiring the Analog outputsFigure 3-1:

A. 24 VDC
B. R

(250 Ω resistance)

load

C. HART-compatible host or controller; and/or signal device
D. Signal device

Note

Ω

For operating the milliamp outputs with a 24V supply, a maximum total loop resistance of 657

is

allowed.

CAUTION!

• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable

instrumentation cable to connect the meter. The instrumentation cable should have individual
screens, foil or braid over each twisted pair, and an overall screen to cover all cores. Where
permissible, connect the overall screen to earth at both ends (360° bonded at both ends).
Connect the inner individual screens at only the controller end.

• Use metal cable glands where the cables enter the meter amplifier box. Fit unused cable ports

with metal blanking plugs.

Installation Manual 27

Wiring

3.2.2 Wire the Discrete output version in an explosion-proof/ flameproof or non-hazardous area

CAUTION!

Meter installation and wiring should be performed by suitably trained personnel only in
accordance with the applicable code of practice.

Procedure

Wire to the appropriate output terminal and pins (see Figure 3-2).

28 Micro Motion Fork Viscosity Meter

mA1+
HART

RS-485

PWR

DO

AA
B

RS-485 A

RS-485 B

C

E

D

B

A

A

A

Wiring

Wiring the Discrete output versionFigure 3-2:

A. 24 VDC
B. R

(250 Ω resistance)

load

C. HART-compatible host or controller; and/or signal device

Ω

D. R

load

resistance recommended)

(500

E. Discrete input device

Note

Ω

• For operating the milliamp output with a 24V supply, a maximum total loop resistance of 657

is

allowed.

• When operating the Discrete output with a 24 VDC power supply, a maximum total loop resistance of

1300 Ω is allowed.

CAUTION!

• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable

instrumentation cable to connect the meter. The instrumentation cable should have individual
screens, foil or braid over each twisted pair, and an overall screen to cover all cores. Where
permissible, connect the overall screen to earth at both ends (360° bonded at both ends).
Connect the inner individual screens at only the controller end.

• Use metal cable glands where the cables enter the meter amplifier box. Fit unused cable ports

with metal blanking plugs.

Installation Manual 29

Wiring

3.3 Processor wiring for remote-mount 2700
FOUNDATION™ fieldbus option

3.3.1 RS-485 entity parameters for the remote-mount 2700
FOUNDATION™ fieldbus option

DANGER!

Hazardous voltage can cause severe injury or death. To reduce the risk of hazardous voltage,
shut off power before wiring the meter.

DANGER!

Improper wiring in a hazardous environment can cause an explosion. Install the meter only in
an area that complies with the hazardous classification tag on the meter.

RS-485 output and cable entity parametersTable 3-2:

Cable parameters for intrinsically safe circuit (linear)

Voltage (Ui) 17.22 VDC

Current (Ii) 484 mA

Maximum capacitance (Ci) 1 nF

Maximum inductance (Li) Negligible

Cable parameters for Ex ib IIB, Ex ib IIC

Voltage (Uo) 9.51 VDC

Current (instantaneous) (Io) 480 mA

Current (steady state) (I) 106 mA

Power (Po) 786 mW

Internal resistance (Ri) 19.8 Ω

Cable parameters for Group IIC

Maximum external capacitance (Co) 85 nF

Maximum external inductance (Lo) 25 µH

Maximum external inductance/resistance ratio
(Lo/Ro)

Cable parameters for Group IIB

Maximum external capacitance (Co) 660 nF

Maximum external inductance (Lo) 260 µH

Maximum external inductance/resistance ratio
(Lo/Ro)

31.1 µH/Ω

124.4 µH/Ω

30 Micro Motion Fork Viscosity Meter

3.3.2 Prepare the 4-wire cable

Important

For user-supplied cable glands, the gland must be capable of terminating the drain wires.

Note

If you are installing unshielded cable in continuous metallic conduit with 360º termination shielding,
you only need to prepare the cable – you do not need to perform the shielding procedure.

Wiring

Installation Manual 31

Wiring

4-wire cable preparationFigure 3-3:

Cable glands

Micro Motion

cable gland

Pass the wires through the gland nut and clamping insert.

Gland nut

Clamping
insert

NPT

Gland supplier

Gland type

Remove the integral processor

cover

Cable layout

M20

User-supplied

cable gland

Pass the wires

through the gland.

Terminate the drain

wires inside the

gland.

Metal conduit

Run conduit to

sensor

Lay cable in conduit

Done

(do not perform the

shielding procedure)

1. Strip 4-1/2 inch (115 mm) of cable jacket.

2. Remove the clear wrap and filler material.

3. Strip all but 3/4 inch (19 mm) of shielding.

Wrap the drain wires twice around the shield and cut off

the excess drain wires.

Go to the shielding

1. Strip 4-1/4 inch (108 mm) of cable jacket.

2. Remove the clear wrap and filler material.

3. Strip all but 1/2 inch (12 mm) of shielding.

Drain wires
wrapped around
shield

procedure

32 Micro Motion Fork Viscosity Meter

Wiring

4-wire cable shieldingFigure 3-4:

From the preparation

procedure

Micro Motion

cable gland

Braided

(armored cable)

Apply the Heat Shrink

1. Slide the shielded heat shrink over the drain wires. Ensure that the
wires are completely covered.

2. Apply heat (250 °F or 120 °C) to shrink the tubing. Do not burn the
cable.

3. Position the clamping insert so the interior end is flush with the braid
of the heat shrink.

Assemble the Gland

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

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

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

Cable shield

type

Shielded heat
shrink

Foil

(shielded cable)

NPT

Gland supplier

Gland type M20

After heat applied

User-supplied

cable gland

Trim 7 mm from the shielded

heat shrink

Trim

Terminate the shield

and drain wires in the

Assemble the gland

according to vendor

gland

instructions

Shield folded back

Done

Gland body

4-wire cable types and usage

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

The 4-wire cable supplied by Micro Motion consists of one pair of red and black 18 AWG
(0.75 mm2) wires for the VDC connection, and one pair of white and green 22 AWG
(0.35 mm2) wires for the RS-485 connection.

User-supplied 4-wire cable must meet the following requirements:

Installation Manual 33

A

B
C

D

Wiring

• Twisted pair construction.

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

hazardous area.

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

transmitter.

• Wire gauge of 22 AWG or larger, with a maximum cable length of 1000 feet.

3.3.3 Processor wiring for the remote-mount 2700
FOUNDATION fieldbus™ option

The following figure illustrates how to connect the individual wires of a 4-wire cable to the
processor terminals. For detailed information on mounting and wiring to the remote­mount 2700 FOUNDATION fieldbus transmitter, see the transmitter installation manual.

Figure 3-5:

Processor (Modbus/RS-485) connections to the remote-mount 2700 FF
transmitter

A. White wire to RS-485/A terminal
B. Green wire to RS-485/B terminal
C. Red wire to Power supply (+) terminal
D. Black wire to Power supply (–) terminal

Important

• To meet the EC Directive for EMC (Electromagnetic Compatibility), it is recommended that the

meter be connected using a suitable instrumentation cable. The instrumentation cable should have
individual screen(s), foil or braid over each twisted pair and an overall screen to cover all cores.
Where permissible, the overall screen should be connected to earth at both ends (360° bonded at
both ends). The inner individual screen(s) should be connected at only one end, the controller end.

• Metal cable glands should be used where the cables enter the meter amplifier box. Unused cable

ports should be fitted with metal blanking plugs.

34 Micro Motion Fork Viscosity Meter

3.4 Wiring to external devices (HART multidrop)

You can wire up to three external HART devices with the meter. The following information
provides wiring diagrams for making those connections in safe and hazardous
environments.

3.4.1 Wire mA1 in a HART multi-drop environment

Important

To wire power and outputs, see Wire power and outputs in a HART single-loop environment.

Wiring

Installation Manual 35

250 Ω

24 VDC

mA1+

HART

A

B

C

E

D

Wiring

Wire mA1 in a HART multi-drop environmentFigure 3-6:

A. HART Device 1
B. HART Device 2
C. HART Device 3
D. Meter (mA+/HART output)
E. HART/Field Communicator

CAUTION!

• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable instrumentation cable to connect

the meter. The instrumentation cable should have individual screens, foil or braid over each twisted pair, and an
overall screen to cover all cores. Where permissible, connect the overall screen to earth at both ends (360° bonded
at both ends). Connect the inner individual screens at only the controller end.

• Use metal cable glands where the cables enter the meter amplifier box. Fit unused cable ports with metal

blanking plugs.

36 Micro Motion Fork Viscosity Meter

3.5 Wiring to signal converters and/or flow computers

For meters with a Time Period Signal (TPS) output, you can wire the meter to an signal
converter or flow computer directly. The following information provides wiring diagrams
for making those connections in safe and hazardous environments.

When wiring the meter to an active HART host or signal converter/flow computer, you are
not required to provide external power to the output connections. These active devices
provide the 24 VDC necessary for these connections.

Wiring

Installation Manual 37

mA1+
HART

RS-485

PWR

TPS

AA
B

24 VDC

RS-485 A

RS-485 B

A

B

Wiring

3.5.1 Wire to a signal converter/flow computer in an explosion-proof/flameproof or non-hazardous area

Figure 3-7:

Wiring to a signal converter/flow computer in an explosion-proof/
flameproof or non-hazardous area

A. Active HART host
B. Active signal converter/flow computer

CAUTION!

• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable

instrumentation cable to connect the meter. The instrumentation cable should have
individual screens, foil or braid over each twisted pair, and an overall screen to cover all
cores. Where permissible, connect the overall screen to earth at both ends (360° bonded at
both ends). Connect the inner individual screens at only the controller end.

• Use metal cable glands where the cables enter the meter amplifier box. Fit unused cable

ports with metal blanking plugs.

38 Micro Motion Fork Viscosity Meter

4 Grounding

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

Prerequisites

Micro Motion suggests the following guides for grounding practices:

• In Europe, EN 60079-14 is applicable to most installations, in particular Sections

12.2.2.3 and 12.2.2.4.

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

applications and requirements.

• For IECEx installations, IEC 60079-14 is applicable.

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

• Use copper wire, 18 AWG (0.75 mm2) or larger wire size.

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

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

Grounding

CAUTION!

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

Procedure

Check the joints in the pipeline or tank installation.

- If the joints in the pipeline or tank are ground-bonded, the meter is automatically

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

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

grounding screw located on the meter electronics.

Installation Manual 39

Grounding

40 Micro Motion Fork Viscosity Meter

Grounding

Installation Manual 41

Micro Motion Inc. USA

Worldwide Headquarters
7070 Winchester Circle
Boulder, Colorado 80301
T [phone]
T [phone]
F [phone]

www.micromotion.com

Micro Motion Europe

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

www.micromotion.nl

*MMI-20020994*

MMI-20020994

Rev AC

2016

Micro Motion Asia

Emerson Process Management
1 Pandan Crescent
Singapore 128461
Republic of Singapore
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 Japan

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

©

2016 Micro Motion, Inc. All rights reserved.

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Electric Co. Micro Motion, ELITE, ProLink, MVD and MVD Direct
Connect marks are marks of one of the Emerson Process
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