Emerson CMF200A Installation manual

Installation Manual
20002158, Rev DI
March 2014
Micro Motion® ELITE® Coriolis Flow and Density
Sensors
Safety and approval information
This Micro Motion product complies with all applicable European directives when properly installed in accordance with the
instructions in this manual. Refer to the 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.
Micro Motion customer service
Email:
•
Worldwide: flow.support@emerson.com
•
Asia-Pacific: APflow.support@emerson.com
Telephone:
North and South America
Europe and Middle East
Asia Pacific
United States
800-522-6277
U.K.
0870 240 1978
Australia
800 158 727
Canada
+1 303-527-5200
The Netherlands
+31 (0) 318 495 555
New Zealand
099 128 804
Mexico
+41 (0) 41 7686 111
France
0800 917 901
India
800 440 1468
Argentina
+54 11 4837 7000
Germany
0800 182 5347
Pakistan
888 550 2682
Brazil
+55 15 3413 8000
Italy
8008 77334
China
+86 21 2892 9000
Venezuela
+58 26 1731 3446
Central & Eastern
+41 (0) 41 7686 111
Japan
+81 3 5769 6803
Russia/CIS
+7 495 981 9811
South Korea
+82 2 3438 4600
Egypt
0800 000 0015
Singapore
+65 6 777 8211
Oman
800 70101
Thailand
001 800 441 6426
Qatar
431 0044
Malaysia
800 814 008
Kuwait
663 299 01
South Africa
800 991 390
Saudia Arabia
800 844 9564
UAE
800 0444 0684
Contents
Contents
Chapter 1
Planning ........................................................................................................................... 1
1.1
1.2
1.3
1.4
Chapter 2
Mounting ......................................................................................................................... 8
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
Chapter 3
Installation checklist ........................................................................................................................1
Best practices ..................................................................................................................................2
Temperature limits ......................................................................................................................... 3
Recommendations for hygienic and self-draining applications ........................................................6
Recommendations for lifting heavy meters .....................................................................................8
Mount the sensor ............................................................................................................................ 9
Mount electronics of high-temperature sensors ............................................................................10
Mount a CMF010 sensor to a wall or pole ...................................................................................... 14
Mount a CMFS007, CMFS010 or CMFS015 sensor in a bracket .......................................................15
Mount a CMFS025, CMFS040 or CMFS050 sensor in a wall mount bracket .................................... 16
Secure wafer-style process connections ........................................................................................ 17
Attach extended electronics ......................................................................................................... 19
Wiring ............................................................................................................................ 21
3.1
3.2
3.3
Options for wiring ......................................................................................................................... 21
Connect 4-wire cable .................................................................................................................... 22
Connect 9-wire cable .................................................................................................................... 26
Chapter 4
Grounding ...................................................................................................................... 28
Chapter 5
Supplementary information ............................................................................................29
5.1
5.2
Installation Manual
Purge the sensor case ....................................................................................................................29
About rupture disks .......................................................................................................................31
i
Contents
ii
Micro Motion ELITE
Planning
1
Planning
Topics covered in this chapter:
•
•
•
•
1.1
Installation checklist
Best practices
Temperature limits
Recommendations for hygienic and self-draining applications
Installation checklist
□
Make sure that the hazardous area specified on the approval tag is suitable for the
environment in which the meter will be installed.
□
Verify that the local ambient and process temperatures are within the limits of the
meter.
□
If your sensor has an integral transmitter, no wiring is required between the sensor
and transmitter. Follow the wiring instructions in the transmitter installation manual
for signal and power wiring.
□
If your transmitter has remote-mounted electronics, follow the instructions in this
manual for wiring between the sensor and the transmitter, and then follow the
instructions in the transmitter installation manual for power and signal wiring.
□
For the wiring between the sensor and the transmitter, consider maximum cable
lengths. The maximum distance between the sensor and transmitter depends on
the cable type. For all types of wiring, Micro Motion recommends using Micro
Motion cable.
Table 1-1: Maximum lengths for Micro Motion cable
Cable type
To transmitter
Maximum length
Micro Motion 9-wire
9739 MVD transmitter
1000 ft (300 m)
All other MVD transmitters
60 ft (20 m)
All 4-wire MVD transmitters
1000 ft (300 m)
Micro Motion 4-wire
Table 1-2: Maximum lengths for user-supplied 4-wire cable
Wire function
Wire size
Maximum length
Power (VDC)
22 AWG (0,35 mm2)
300 ft (90 m)
20 AWG (0,5 mm2)
500 ft (150 m)
18 AWG (0,8 mm2)
1000 ft (300 m)
22 AWG (0,35 mm2) or larger
1000 ft (300 m)
Signal (RS-485)
Installation Manual
1
Planning
□
For optimal performance, install the sensor in the preferred orientation. The sensor
will work in any orientation as long as the flow tubes remain full of process fluid.
Table 1-3: Preferred sensor orientation
Process
Preferred
orientation
Alternate orientations
Liquids
Gases
Slurries
□
1.2
Install the meter so that the flow direction arrow on the sensor case matches the
actual forward flow of the process. (Flow direction is also software-selectable.)
Best practices
The following information can help you get the most from your sensor.
2
Micro Motion ELITE
Planning
1.3
Installation Manual
•
There are no pipe run requirements for Micro Motion sensors. Straight runs of pipe
upstream or downstream are unnecessary.
•
If the sensor is installed in a vertical pipeline, liquids and slurries should flow upward
through the sensor. Gases may flow upward or downward.
•
Keep the sensor tubes full of process fluid.
•
For halting flow through the sensor with a single valve, install the valve downstream
from the sensor.
•
Minimize bending and torsional stress on the meter. Do not use the meter to align
misaligned piping.
•
The sensor does not require external supports. The flanges will support the sensor in
any orientation. (Some sensor models installed in very small, flexible pipeline have
optional installation instructions that allow for external supports.)
Temperature limits
•
Sensors can be used in the process and ambient temperature ranges shown in the
temperature limit graphs. For the purposes of selecting electronics options,
temperature limit graphs should be used only as a general guide. If your process
conditions are close to the gray areas, it may be inappropriate to use electronics
options other than a junction box. Consult consult with your Micro Motion
representative.
•
In all cases, the electronics cannot be operated where the ambient temperature is
below –40 °F (–40 °C) or above +140 °F (+60 °C). If a sensor is to be used where the
ambient temperature is outside of the range permissible for the electronics, the
electronics must be remotely located where the ambient temperature is within the
permissible range, as indicated by the shaded area of the temperature limit graphs.
•
Temperature limits may be further restricted by hazardous area approvals. Refer to
the hazardous area approvals documentation shipped with the sensor or available
from the Micro Motion web site (www.micromotion.com).
•
The extended-mount electronics option allows the sensor case to be insulated
without covering the transmitter, core processor, or junction box, but does not
affect temperature ratings.
3
Planning
Figure 1-1: Ambient and process temperature limits for ELITE CMF***M/L/H/P
(excludes cryogenic modifications) and CMFS007-015 meters
140
(60)
140 (60)
C
A
–40 (–40)
–148 (–100)
–400
(–240)
A.
B.
C.
D.
D
113 (45)
D
B
400
(204)
Ambient temperature °F (°C)
Process temperature in °F (°C)
All available electronic options
Extended or remote mount electronics only
Figure 1-2: Ambient and process temperature limits for ELITE CMFS025–CMFS150
meters
140 (60)
140
(60)
D
113 (45)
C
A
–40 (–40)
D
–148 (–100)
–58
(–50)
A.
B.
C.
D.
4
B
400
(204)
Ambient temperature °F (°C)
Process temperature in °F (°C)
All available electronic options
Extended or remote mount electronics only
Micro Motion ELITE
Planning
Figure 1-3: Ambient and process temperature limits for cryogenic ELITE meters
140 (60)
A
C
–40 (–40)
D
–148 (–100)
–400
(–240)
A.
B.
C.
D.
B
176
(80)
Ambient temperature °F (°C)
Process temperature in °F (°C)
All available electronic options
Extended or remote mount electronics only
Figure 1-4: Ambient and process temperature limits for high temperature ELITE
meters
140 (60)
C
A
–40 (–40)
D
–148 (–100)
–50
(–58)
A.
B.
C.
D.
Installation Manual
B
662
(350)
Ambient temperature °F (°C)
Process temperature in °F (°C)
All available electronic options
Extended or remote mount electronics only
5
Planning
Figure 1-5: Ambient and process temperature limits for Super Duplex ELITE meters
140 (60)
C
A
–40 (–40)
D
–148 (–100)
–40
(–40)
A.
B.
C.
D.
1.4
B
400
(204)
Ambient temperature °F (°C)
Process temperature in °F (°C)
All available electronic options
Extended or remote mount electronics only
Recommendations for hygienic and selfdraining applications
CMFS sensors are certified EHEDG TYPE EL CLASS I for hygienic applications when installed
vertically with the process fitting and gasket combinations listed in the Position Paper of
the EHEDG Test Methods Subgroup (available at http://www.ehedg.org). Other process
connections/gasket combinations may be used provided they have been evaluated and
successfully tested for in-place cleanability according to the latest edition of EHEDG
Document 2. Refer to the ELITE Product Data Sheet for further information about fitting
options.
For optimal cleanability and drainability:
6
•
If possible, install the sensor in a vertical pipeline with the process fluid flowing
upward through the sensor.
•
If the sensor must be installed in a horizontal pipeline, drainage is accomplished by
air purge evacuation of the pipeline circuit.
•
For clean-in-place (CIP) applications, Micro Motion recommends using the
generally-accepted flow velocity of at least 1.5 m/s for cleaning the sensor.
•
The gap between the electronics housing and sensor body should be inspected
periodically. Manually clean this gap when necessary.
Micro Motion ELITE
Planning
Figure 1-6: Installation for self-draining applications
A
B
C
A.
B.
C.
Installation Manual
Process pipeline
Direction of normal process flow
Direction of drainage
7
Mounting
2
Mounting
Topics covered in this chapter:
2.1
•
•
•
•
Recommendations for lifting heavy meters
Mount the sensor
Mount electronics of high-temperature sensors
Mount a CMF010 sensor to a wall or pole
•
•
•
•
Mount a CMFS007, CMFS010 or CMFS015 sensor in a bracket
Mount a CMFS025, CMFS040 or CMFS050 sensor in a wall mount bracket
Secure wafer-style process connections
Attach extended electronics
Recommendations for lifting heavy meters
Heavy meters (those over 50 lb. [22 kg]), and even lighter meters that must be installed in
elevated or difficult-to-reach places, usually require additional consideration when
transporting or lifting them into their installation location.
8
•
Safe handling during transportation and installation is the responsibility of the
installer – know and follow all safety practices and regulations for your facility and
for any lifting/rigging equipment being used
•
A professional rigging crew with proper equipment should be used
•
Typical equipment for handling heavy meters includes the following:
-
Fixed hoist boom trucks or cranes
-
Continuous web belt slings
-
Eye to eye web belt slings
-
Two leg wire rope slings
•
Lift a meter by its case or on the case side of its process fittings.
•
Do not lift a meter by its electronics (junction box, transmitter, or any electrical
fittings) or by its purge fittings
•
It may be useful to identify the meter center of gravity
•
Protect the sealed surfaces on the process fittings with factory-installed flange
protectors or comparable field-installed protection
Micro Motion ELITE
Mounting
Figure 2-1: Acceptable lifting points
Figure 2-2: Center of gravity for large meters
A
A.
Typical center of gravity
Note
Complete and detailed dimensional drawings, including the location of the center of gravity, can be
found through the product drawings link in our online store (www.micromotion.com/onlinestore).
2.2
Mount the sensor
Use your common practices to minimize torque and bending load on process connections.
Tip
To reduce the risk of condensation or excessive moisture, the conduit opening should not point
upward (if possible). The conduit opening of the junction box or core processor can be rotated freely
to facilitate wiring.
Installation Manual
9
Mounting
CAUTION!
Do not lift the sensor by the electronics or purge connections. Lifting the sensor by the
electronics or purge connections can damage the device.
Figure 2-3: Mounting the sensor
Notes
•
Do not use the sensor to support the piping.
•
The sensor does not require external supports. The flanges will support the sensor in any
orientation. (Some sensor models installed in very small, flexible pipeline have optional installation
instructions that allow for external supports.)
2.3
Mount electronics of high-temperature sensors
The electronics of high-temperature sensors are attached to the end of a 32" (812 mm)
pre-installed flexible conduit. The electronics must be separately mounted on a wall or
instrument pole.
10
Micro Motion ELITE
Mounting
Figure 2-4: Components of a high-temperature sensor
A
B
C
D
A.
B.
C.
D.
Sensor
Electronics
Mounting bracket
Flexible conduit (minimum bend radius 6" [152 mm])
With some large meter sizes, the meter may ship with the electronics attached to the
sensor case. The meter cannot be operated in this configuration. Detach the electronics
bracket from the sensor case and then proceed to mount the electronics to a wall or
instrument pole as described below.
Important
Do not operate the meter while the electronics are attached to the sensor case.
Installation Manual
11
Mounting
Figure 2-5: Removing electronics from the sensor case
A
A.
Detach electronics from sensor case and mount to a wall or instrument pole
Procedure
•
12
For wall mounting, use four 5/16" or four M8 bolts to secure the mounting bracket.
Micro Motion ELITE
Mounting
Figure 2-6: Wall-mount components
A
B
C
A. Wall or flat surface
B. Electronics (enhanced core processor shown)
C. Flexible conduit
•
Installation Manual
For mounting to an instrument pole, use a 2-inch U-bolt pipe kit to secure the
mounting bracket.
13
Mounting
Figure 2-7: Pole-mount components
A
B
C
A. Instrument pole
B. Electronics (enhanced core processor shown)
C. Flexible conduit
2.4
Mount a CMF010 sensor to a wall or pole
The CMF010 sensor has an optional mounting configuration for use with small or flexible
pipeline. If the pipeline adequately supports the sensor, this procedure can be skipped.
1.
14
Locate the optional mounting holes. For sensors with a junction box, the junction
box must be rotated to the side to expose the mounting holes.
Micro Motion ELITE
Mounting
Figure 2-8: Optional mounting for CMF010 sensors
A
B
C
A. Two user-supplied 5/16" (M8) bolts
B. Junction box or core processor (junction box shown)
C. Mounting surface
2.5
2.
If necessary, install rigid standoffs between the sensor and the mounting surface.
3.
Using two user-supplied 5/16" (M8) bolts (minimum length 2 1/4" [58 mm]), secure
the sensor case to the mounting surface.
Mount a CMFS007, CMFS010 or CMFS015
sensor in a bracket
The CMFS007, CMFS010 and CMFS015 sensors have an optional mounting bracket for use
with small or flexible pipeline. If the pipeline adequately supports the sensor, this
procedure can be skipped.
Installation Manual
1.
Secure the mounting bracket to a wall or other flat surface with four user-supplied
5/16" (8 mm) bolts.
2.
Place the sensor into the bracket.
3.
Secure the sensor in the bracket with the supplied 5/16" (M8) U-bolts.
15
Mounting
Figure 2-9: Mounting bracket for CMFS007, CMFS010, and CMFS015
A
B
C
A.
B.
C.
2.6
Mounting bracket
Mounting holes
Supplied U-bolts
Mount a CMFS025, CMFS040 or CMFS050
sensor in a wall mount bracket
The CMFS025, CMFS040, and CMFS050 sensors have an optional wall mounting bracket.
1.
Assemble the bracket.
Figure 2-10: Assembled wall mounting bracket for CMFS025, CMFS040, and
CMFS050
2.
16
Attach the bracket to the wall using fasteners appropriate for the mounting surface.
Micro Motion ELITE
Mounting
3.
Place the sensor into the bracket.
4.
Secure the sensor in the bracket with the supplied fasteners.
Figure 2-11: CMFS025, CMFS040, or CMFS050 wall mounted using bracket
2.7
Secure wafer-style process connections
A wafer-style connection lets you clamp the sensor into the pipeline. A wafer installation
kit is shipped with a wafer-style sensor.
1.
Make sure that the bolts provided are rated for your process connection.
2.
Slip the sensor alignment rings over each end of the sensor wafer, then insert the
sensor between the process connections in the pipeline.
Tip
Micro Motion recommends installing gaskets (user-supplied).
Installation Manual
17
Mounting
Figure 2-12: Wafer-style connection components
A
B
C
D
E
A.
B.
C.
D.
E.
Flange nut
Gasket (user-supplied)
Alignment ring
Flange bolt
Sensor wafer
3.
Insert the flange bolts through both process connections, and thread the flange nuts
onto the bolts.
4.
With your fingers, tighten the flange nuts.
5.
Rotate the sensor alignment rings in the direction that pushes the bolts outward.
Tip
Rotate both sensor aligment rings until the assembly is centered and tight.
Figure 2-13: Alignment ring usage
A
B
C
A. Direction to rotate the alignment ring
B. Direction the flange bolts are pushed
C. Flange bolt
18
Micro Motion ELITE
Mounting
6.
2.8
With a wrench, tighten the nuts in an alternating order.
Attach extended electronics
If you ordered a sensor with extended electronics, you will need to install the extender
onto the sensor case.
Note
Extended core processors are matched at the factory to specific sensors. Keep each core processor
together with the sensor with which it was shipped.
CAUTION!
Keep the extender and feedthrough clean and dry. Moisture or debris in the extender or
feedthrough can damage electronics and result in measurement error or flowmeter failure.
Procedure
1.
Installation Manual
Remove and recycle the plastic cap from the feedthrough on the sensor.
19
Mounting
Figure 2-14: Feedthrough and extender components
A
B
C
G
D
E
H
F
A.
B.
C.
D.
E.
F.
G.
H.
20
Transmitter or core processor
Extender
O-ring
Feedthrough
Clamping ring
Clamping screw
Plastic plug
Plastic cap
2.
Loosen the clamping screw and remove the clamping ring. Leave the O-ring in place
on the feedthrough.
3.
Remove and recycle the plastic plug from the extender.
4.
Fit the extender onto the feedthrough by carefully aligning the notches on the
bottom of the extender with the notches on the feedthrough.
5.
Close the clamping ring and tighten the clamping screw to 13–18 in-lbs.
(1,5–2 N-m).
Micro Motion ELITE
Wiring
3
Wiring
Topics covered in this chapter:
•
•
•
3.1
Options for wiring
Connect 4-wire cable
Connect 9-wire cable
Options for wiring
The wiring procedure you follow depends on which electronics option you have.
Table 3-1: Wiring procedures by electronics option
Electronics option
Wiring procedure
Integral transmitter
No wiring is required between sensor and transmitter. See the transmitter
installation manual for wiring the power and signal cable to the transmitter.
™
™
MVD Direct Connect
No transmitter to wire. See the MVD Direct Connect manual for wiring the
power and signal cable between the sensor and the direct host.
Core processor
Connect a 4-wire cable between the sensor and transmitter. Refer to the 4-wire
connection instructions in this manual.
Junction box
Connect a 9-wire cable between the sensor and transmitter. Refer to the 9-wire
connection instructions in this manual, as well as the Micro Motion 9-Wire
Flowmeter Cable Preparation and Installation Guide.
CAUTION!
Make sure the hazardous area specified on the sensor approval tag is suitable for the
environment in which the sensor will be installed. Failure to comply with the requirements for
intrinsic safety in a hazardous area could result in an explosion.
CAUTION!
Fully close and tighten all housing covers and conduit openings. Improperly sealed housings
can expose electronics to moisture, which can cause measurement error or flowmeter failure.
Inspect and grease all gaskets and O-rings.
Installation Manual
21
Wiring
3.2
Connect 4-wire cable
3.2.1
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.
22
Micro Motion ELITE
Wiring
Figure 3-1: 4-wire cable preparation
Remove the core processor
cover
Cable glands
Cable layout
Metal conduit
Gland supplier
Micro Motion
cable gland
User-supplied
cable gland
Run conduit to
sensor
Pass the wires through the gland nut and clamping insert.
Gland nut
Pass the wires
through the gland.
Terminate the drain
wires inside the
gland.
Clamping
insert
Lay cable in conduit
Done
(do not perform the
shielding procedure)
NPT
M20
Gland type
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.
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.
Wrap the drain wires twice around the shield and cut off
the excess drain wires.
Drain wires
wrapped around
shield
Go to the shielding
procedure
Installation Manual
23
Wiring
Figure 3-2: 4-wire cable shielding
From the preparation
procedure
Micro Motion
cable gland
Braided
(armored cable)
Cable shield
type
User-supplied
cable gland
Gland supplier
Foil
(shielded cable)
NPT
Gland type
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.
M20
Trim 7 mm from the shielded
heat shrink
Trim
Shielded heat
shrink
After heat applied
Terminate the shield
and drain wires in the
gland
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.
Shield folded back
Assemble the gland
according to vendor
instructions
Gland body
Done
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:
24
Micro Motion ELITE
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.
Table 3-2: Wire gauge
3.2.2
Wire gauge
Maximum cable length
VDC 22 AWG (0.35 mm2)
300 ft (90 m)
VDC 20 AWG (0.5 mm2)
500 ft (150 m)
VDC 18 AWG (0.8 mm2)
1000 ft (300 m)
RS-485 22 AWG (0.35 mm2) or larger
1000 ft (300 m)
Connect the wires to the core processor terminals
After the 4-wire cable has been prepared and shielded (if required), connect the individual
wires of the 4-wire cable to the terminals on the core processor.
Installation Manual
25
Wiring
Figure 3-3: Core processor terminals
From Step 1 or 2
Standard
core processor
Core processor
type
Connect the wires to the core processor terminals:
Red wire
>
Terminal 1 (Power supply +)
Black wire
>
Terminal 2 (Power supply –)
White wire
>
Terminal 3 (RS-485/A)
Green wire
>
Terminal 4 (RS-485/B)
Reinstall and tighten the core processor cover
Enhanced
core processor
Connect the wires to the core processor terminals:
Red wire
>
Terminal 1 (Power supply +)
Black wire
>
Terminal 2 (Power supply –)
White wire
>
Terminal 3 (RS-485/A)
Green wire
>
Terminal 4 (RS-485/B)
1. Reinstall the core processor cover.
2. Torque cover screws to:
•
10–13 in-lbs (1,13–1,47 N-m) for aluminum housing
•
Minimum 19 in-lbs (2,1 N-m) for stainless steel
housing
Connect the wires to the transmitter
terminals
(see the transmitter manual)
3.3
26
Connect 9-wire cable
1.
Prepare and install the cable according to the instructions in the Micro Motion 9Wire Flowmeter Cable Preparation and Installation Guide.
2.
Insert the stripped ends of the individual wires into the terminal blocks. Ensure that
no bare wires remain exposed.
Micro Motion ELITE
Wiring
Installation Manual
3.
Match the wires color for color. For wiring at the transmitter or remote core
processor, refer to the transmitter documentation.
4.
Tighten the screws to hold the wires in place.
5.
Ensure integrity of gaskets, then tightly close and seal the junction box cover and all
housing covers on the transmitter or core processor.
6.
Refer to the transmitter installation manual for signal and power wiring instructions.
27
Grounding
4
Grounding
The meter must be grounded according to the standards that are applicable at the site.
The customer is responsible for knowing and complying with all applicable standards.
Prerequisites
Micro Motion suggests the following guides for grounding practices:
•
In Europe, IEC 79-14 is applicable to most installations, in particular Sections
12.2.2.3 and 12.2.2.4.
•
In the U.S.A. and Canada, ISA 12.06.01 Part 1 provides examples with associated
applications and requirements.
If no external standards are applicable, follow these guidelines to ground the sensor:
•
Use copper wire, 14 AWG (2,0 mm2) or larger wire size.
•
Keep all ground leads as short as possible, less than 1 Ω impedance.
•
Connect ground leads directly to earth, or follow plant standards.
CAUTION!
Ground the flowmeter to earth, or follow ground network requirements for the facility.
Improper grounding can cause measurement error.
Procedure
Check the joints in the pipeline.
-
If the joints in the pipeline are ground-bonded, the sensor is automatically grounded
and no further action is necessary (unless required by local code).
-
If the joints in the pipeline are not grounded, connect a ground wire to the grounding
screw located on the sensor electronics.
Tip
The sensor electronics may be a transmitter, core processor, or junction box. The grounding
screw may be internal or external.
28
Micro Motion ELITE
Supplementary information
5
Supplementary information
Topics covered in this chapter:
•
•
5.1
Purge the sensor case
About rupture disks
Purge the sensor case
If the sensor has purge fittings, they should remain sealed at all times. After a purge plug
has been removed, the sensor case should be purged with argon or nitrogen and resealed.
Purging the case protects internal components. The sensor is purged of all oxygen and
sealed at the factory. If the purge plugs are never removed, it is not necessary to purge or
re-seal the sensor. For more information, contact Micro Motion Customer Service.
If a purge plug is removed from the sensor case, it will be necessary to repurge the case.
CAUTION!
Take all necessary precautions when removing purge plugs. Removing a purge plug
compromises the secondary containment of the sensor and could expose the user to process
fluid.
CAUTION!
Improper pressurization of the sensor case could result in personal injury. Removing a purge
plug will require the sensor case to be repurged with a dry inert gas. Follow all instructions
provided in the case purging procedure.
Prerequisites
Make sure the following are available before beginning the purge procedure:
•
Teflon® tape
•
Argon or nitrogen gas sufficient to purge the sensor case
Procedure
Installation Manual
1.
Shut down the process, or set control devices for manual operation. Before
performing the case purging procedure, shut down the process or set the control
devices for manual operation. Performing the purge procedure while the flowmeter
is operating could affect measurement accuracy, resulting in inaccurate flow signals.
2.
Remove both purge plugs from the sensor case. If purge lines are being used, open
the valve in the purge lines.
3.
Prepare the purge plugs for reinstallation by wrapping them with 3–5 turns of Teflon
tape.
29
Supplementary information
4.
Connect the supply of nitrogen or argon gas to the inlet purge connection or open
inlet purge line. Leave the outlet connection open.
• Exercise caution to avoid introducing dirt, moisture, rust, or other contaminants
into the sensor case.
• If the purge gas is heavier than air (such as argon), locate the inlet lower than the
outlet, so that the purge gas will displace air from bottom to top.
• If the purge gas is lighter than air (such as nitrogen), locate the inlet higher than
the outlet, so that the purge gas will displace air from top to bottom.
5.
Make sure that there is a tight seal between the inlet connection and sensor case, so
that air cannot be drawn by suction into the case or purge line during the purging
process.
6.
Run purge gas through the sensor.
The purge time is the amount of time required for full exchange of atmosphere to
inert gas. The larger the line size, the greater amount of time is required to purge
the case. If purge lines are being used, increase the purge time to fill the additional
volume of the purge line.
Note
Keep the purge gas pressure below 30 psig (2 bar).
Table 5-1: Purge time
30
Sensor model
Purge rate, in ft3/hr (l/h)
Time, in minutes
CMF010
20 (566)
1
CMF025
20 (566)
1
CMF050
20 (566)
2
CMF100
20 (566)
5
CMF200
20 (566)
12
CMF300
20 (566)
30
CMF350
20 (566)
45
CMF400
20 (566)
55
CMFHC2
20 (566)
100
CMFHC3
20 (566)
170
CMFHC4
20 (566)
268
CMFS007
20 (566)
1 1/2
CMFS010
20 (566)
1 1/2
CMFS015
20 (566)
1 1/2
CMFS025
20 (566)
4 1/2
CMFS040
20 (566)
4 1/2
CMFS050
20 (566)
4 1/2
CMFS075
20 (566)
6
Micro Motion ELITE
Supplementary information
Table 5-1: Purge time (continued)
7.
Sensor model
Purge rate, in ft3/hr (l/h)
Time, in minutes
CMFS100
20 (566)
6
CMFS150
20 (566)
6
At the appropriate time, shut off the gas supply, then immediately seal the purge
outlet and inlet connections with the purge plugs.
Note
Avoid pressurizing the sensor case. If pressure inside the case elevates above atmospheric
pressure during operation, the flowmeter density calibration will be inaccurate.
8.
5.2
Make sure that the purge fitting seals are tight so that air cannot be drawn by
suction into the sensor case.
About rupture disks
Rupture disks are meant to vent process fluid from the sensor case in the event of a flow
tube rupture. Some users connect a pipeline to the rupture disk to help contain escaping
process fluid. For more information about rupture disks, contact Micro Motion Customer
Service.
If the sensor has rupture disks, they are installed in the sensor purge fitting openings. The
rupture disks should remain installed at all times. If you remove a rupture disk from the
sensor case, it will be necessary to re-purge the case.
CAUTION!
Stay clear of the rupture disk pressure relief area. High-pressure fluid escaping from the sensor
can cause severe injury or death.
Installation Manual
31
*20002158*
20002158
Rev DI
2014
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