Rosemount 8705 Operating Manual

00825-0400-4444, Rev. AA

Rosemount® 8700M Magnetic Flowmeter Platform

with Modbus® RS-485 Protocol

Quick Start Guide

August 2015

Quick Start Guide

August 2015

NOTICE

This document provides basic installation guidelines for the Rosemount 8700M Magnetic Flowmeter Platform with Modbus RS-485 Protocol. For information about installing, configuring, maintaining, or troubleshooting this product, refer to Reference Manual 00809-0400-4444. The reference manual—as well as this quick start guide—are available online at www.rosemount.com.

Failure to follow these installation guidelines could result in death or serious injury.

 Installation and servicing instructions are for use by qualified personnel only. Do not perform

any servicing other than that contained in the operating instructions, unless qualified.

 Verify the installation is done safely and is consistent with the operating environment.  If installed in explosive atmospheres (hazardous areas, classified areas, or an “Ex” environment),

it must be assured that the device certification and installation techniques are suitable for that particular environment.

 Explosion hazard—Do not disconnect equipment when a flammable or combustible atmosphere

is present.

 To prevent ignition of flammable or combustible atmospheres, disconnect power before

servicing circuits.

 Do not connect a Rosemount 8732EM Transmitter to a non-Rosemount sensor that is located in

an explosive atmosphere.

 Substitution of components may impair Intrinsic Safety.  Follow national, local, and plant standards to properly earth ground the transmitter and sensor.

The earth ground must be separate from the process reference ground.

 Rosemount Magnetic Flowmeters ordered with non-standard paint options or non-metallic

labels may be subject to electrostatic discharge. To avoid electrostatic charge build-up, do not rub the flowmeter with a dry cloth or clean with solvents.

NOTICE

 The sensor liner is vulnerable to handling damage. Never place anything through the sensor for

the purpose of lifting or gaining leverage. Liner damage may render the sensor inoperable.

 Metallic or spiral-wound gaskets should not be used as they will damage the liner face of the

sensor. If spiral wound or metallic gaskets are required for the application, lining protectors must be used. If frequent removal is anticipated, take precautions to protect the liner ends. Short spool pieces attached to the sensor ends are often used for protection.

 Correct flange bolt tightening is crucial for proper sensor operation and life. All bolts must be

tightened in the proper sequence to the specified torque specifications. Failure to observe these instructions could result in severe damage to the sensor lining and possible sensor replacement.

 In cases where high voltage/high current are present near the meter installation, ensure proper

protection methods are followed to prevent stray voltage/current from passing through the meter. Failure to adequately protect the meter could result in damage to the transmitter and lead to meter failure.

 Completely remove all electrical connections from both sensor and transmitter prior to welding

on the pipe. For maximum protection of the sensor, consider removing it from the pipeline.

Contents

Transmitter installation . . . . . .page 3

Handling and lifting . . . . . . . . . page 5

Mounting . . . . . . . . . . . . . . . . . . page 6

Sensor installation . . . . . . . . . . . page 9

Process reference connection page 15

Wiring the transmitter . . . . . .page 18

Modbus configuration . . . . . . page 28

Product Certifications . . . . . . page 36

August 2015

Quick Start Guide

Step 1: Transmitter installation

Installation of the Rosemount Magnetic Flowmeter includes both detailed mechanical and electrical installation procedures.

Before installing the Rosemount 8732EM Magnetic Flowmeter Transmitter, there are several pre-installation steps that should be completed to make the installation process easier:

 Identify the options and configurations that apply to your application  Set the hardware switches if necessary  Consider mechanical, electrical, and environmental requirements

1.1 Identify options and configurations

The typical installation of the 8732EM includes a device power connection, a Modbus RS-485 output connection, and sensor coil and electrode connections. Other applications may require one or more of the following configurations or options:

 Pulse Output  Discrete Input/Discrete Output

Hardware switches

The 8732EM electronics stack is equipped with user-selectable hardware switches. These switches set the Internal/External Pulse Power and Transmitter Security. The factory default settings for these switches is as follows:

Table 1. Hardware Switch Default Settings

Hardware switch Default setting

Internal/External Pulse Power

Transmitter Security

External

Off

In most cases, it will not be necessary to change the hardware switch settings. If the settings need to be changed, follow the steps outlined under “Changing hardware switch settings” in Reference Manual 00809-0400-4444.

Note

To prevent switch damage, use a non-metallic tool to move switch positions.

Be sure to identify any additional options and configurations that apply to the installation. Keep a list of these options for consideration during the installation and configuration procedures.

1.2 Mechanical considerations

The mounting site for the Rosemount 8732EM transmitter should provide enough room for secure mounting, easy access to conduit entries, full opening of the transmitter covers, and easy readability of the LOI screen, if equipped.

For remote mount transmitter (8732EMR provided for use on a 2-inch pipe or a flat surface (see Figure 1).

xxx) installations, a mounting bracket is

Quick Start Guide

 >@

Note

If the Rosemount 8732EM is mounted separately from the sensor, it may not be subject to limitations that might apply to the sensor.

Rotate integral mount transmitter housing

The transmitter housing can be rotated on the sensor in 90-degree increments by removing the four mounting screws on the bottom of the housing. Do not rotate the housing more than 180 degrees in any one direction. Prior to tightening, be sure the mating surfaces are clean, the O-ring is seated in the groove, and there is no gap between the housing and the sensor.

Figure 1. Rosemount 8732EM Dimensional Drawing

August 2015

Note

Conduit entries are 1/2- in. NPT or M20 connections. If an alternate thread connection is required, thread adapters must be used.

1.3 Electrical considerations

Before making any electrical connections to the Rosemount 8732EM, consider national, local, and plant electrical installation requirements. Be sure to have the proper power supply, conduit, and other accessories necessary to comply with these standards.

Both remotely and integrally mounted Rosemount 8732EM transmitters require external power, so there must be access to a suitable power source.

August 2015

Quick Start Guide

Table 2. Electrical Data

Rosemount 8732EM Flow Transmitter

Power input 90–250VAC, 0.45A, 40VA

Pulsed circuit Internally powered (Active): Outputs up to 12VDC, 12.1mA, 73mW

Modbus output circuit Internally powered (Active): Outputs up to 3.3VDC, 100mA, 100mW

Termination resistors Typically 120 ohms. Refer to the MODBUS over Serial Line Specification &

Um 250V

Coil excitation output 500mA, 40V max, 9W max

Rosemount 8705-M and 8711-M/L Sensor

Coil excitation input 500mA, 40V max, 20W max

Electrode circuit 5V, 200uA, 1mW

1. Provided by the transmitter

12–42VDC, 1.2A, 15W

Externally powered (Passive): Input up to 28VDC, 100mA, 1W

Implementation Guide (http://www.modbus.org) for more details.

(1)

1.4 Environmental considerations

To ensure maximum transmitter life, avoid extreme temperatures and excessive vibration. Typical problem areas include the following:

 High-vibration lines with integrally mounted transmitters.  Tropical/desert installations in direct sunlight.  Outdoor installations in arctic climates.

Remote-mounted transmitters may be installed in the control room to protect the electronics from the harsh environment and to provide easy access for configuration or service.

Step 2: Handling and lifting

 Handle all parts carefully to prevent damage. Whenever possible, transport

the system to the installation site in the original shipping container.

 PTFE-lined sensors are shipped with end covers that protect it from both

mechanical damage and normal unrestrained distortion. Remove the end covers just before installation.

 Keep the shipping plugs in the conduit connections until you are ready to

connect and seal them.

 The sensor should be supported by the pipeline. Pipe supports are

recommended on both the inlet and outlet sides of the sensor pipeline. There should be no additional support attached to the sensor.

 Additional safety recommendations for mechanical handling:

- Use proper PPE (Personal Protection Equipment) including safety glasses and steel toed shoes.

- Do not drop the device from any height.

Quick Start Guide

 Do not lift the meter by holding the electronics housing or junction box.The

sensor liner is vulnerable to handling damage. Never place anything through the sensor for the purpose of lifting or gaining leverage. Liner damage can render the sensor useless.

 If provided, use the lifting lugs on each flange to handle the Magnetic

Flowmeter when it is transported and lowered into place at the installation site. If lifting lugs are not provided, the Magnetic Flowmeter must be supported with a lifting sling on each side of the housing.

- Standard Pressure 3-in. through 36-in. Flanged Magnetic Flowmeters come with lifting lugs.

- High Pressure (above 600#) 1-in. through 24-in. Flanged Magnetic Flowmeters come with lifting lugs.

- Wafers and Sanitary Magnetic Flowmeters do not come with lifting lugs.

Figure 2. Rosemount 8705 Sensor Support for Handling and Lifting

August 2015

A. Without lifting lugs B. With lifting lugs

Step 3: Mounting

3.1 Upstream/downstream piping

To ensure specified accuracy over widely varying process conditions, install the sensor with a minimum of five straight pipe diameters upstream and two pipe diameters downstream from the electrode plane (see Figure 3).

August 2015

5 Pipe Diameters 2 Pipe Diameters

Flow

Figure 3. Upstream and Downstream Straight Pipe Diameters

Installations with reduced upstream and downstream straight runs are possible. In reduced straight run installations, the meter may not meet absolute accuracy specifications. Reported flow rates will still be highly repeatable.

Quick Start Guide

3.2 Flow direction

The sensor should be mounted so that the arrow points in the direction of flow. See Figure 4.

Figure 4. Flow Direction Arrow

3.3 Sensor location

The sensor should be installed in a location that ensures it remains full during operation. Vertical installation with upward process fluid flow keeps the cross-sectional area full, regardless of flow rate. Horizontal installation should be restricted to low piping sections that are normally full.

Quick Start Guide

FLOW

CORRECT INCORRECT

Figure 5. Sensor Orientation

3.4 Electrode orientation

The electrodes in the sensor are properly oriented when the two measurement electrodes are in the 3 and 9 o’clock positions or within 45 degrees from the horizontal, as shown on the left of Figure 6. Avoid any mounting orientation that positions the top of the sensor at 90 degrees from the vertical position as shown in Figure 6.

August 2015

Figure 6. Mounting Position

For hazardous location installations, refer to Appendix D of Reference Manual 00809-0400-4444 for sensor orientation pertaining to specific T-code compliance.

August 2015

FLOW

Quick Start Guide

Step 4: Sensor installation

Flanged sensors

4.1 Gaskets

The sensor requires a gasket at each process connection. The gasket material must be compatible with the process fluid and operating conditions. G askets a re required on each side of a grounding ring (see Figure 7). All other applications (including sensors with lining protectors or a grounding electrode) require only one gasket on each process connection.

Note

Metallic or spiral-wound gaskets should not be used as they will damage the liner face of the sensor. If spiral wound or metallic gaskets are required for the application, lining protectors must be used.

Figure 7. Flanged Gasket Placement

A. Grounding Ring and Gasket (Optional) B. Customer-supplied Gasket

Quick Start Guide

4.2 Flange bolts

Note

Do not bolt one side at a time. Tighten both sides simultaneously. Example:

1. Snug upstream

2. Snug downstream

3. Tighten upstream

4. Tighten downstream

Do not snug and tighten the upstream side and then snug and tighten the downstream side. Failure to alternate between the upstream and downstream flanges when tightening bolts may result in liner damage.

Suggested torque values by sensor line size and liner type are listed in Table 4 for ASME B16.5 flanges and Table 5 for EN flanges. Consult the factory if the flange rating of the sensor is not listed. Tighten flange bolts on the upstream side of the sensor in the incremental sequence shown in Figure 8 to 20% of the suggested torque values. Repeat the process on the downstream side of the sensor. For sensors with greater or fewer flange bolts, tighten the bolts in a similar crosswise sequence. Repeat this entire tightening sequence at 40%, 60%, 80%, and 100% of the suggested torque values.

If leakage occurs at the suggested torque values, the bolts can be tightened in additional 10% increments until the joint stops leaking, or until the measured torque value reaches the maximum torque value of the bolts. Practical consideration for the integrity of the liner often leads to distinct torque values to stop leakage due to the unique combinations of flanges, bolts, gaskets, and sensor liner material.

Check for leaks at the flanges after tightening the bolts. Failure to use the correct tightening methods can result in severe damage. While under pressure, sensor materials may deform over time and require a second tightening 24 hours after the initial installation.

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Figure 8. Flange Bolt Torquing Sequence

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Quick Start Guide

Prior to installation, identify the lining material of the flow sensor to ensure the suggested torque values are applied.

Table 3. Lining Material

Fluoropolymer liners Other liners

T - PTFE P - Polyurethane

F - ETFE N - Neoprene

A - PFA L - Linatex (Natural Rubber)

K - PFA+

D - Adiprene

Table 4. Suggested Flange Bolt Torque Values for Rosemount 8705 (ASME)

Fluoropolymer liners Other liners

Size

code

005 0.5-in. (15 mm) 8 8 N/A N/A

010 1-in. (25 mm) 8 12 N/A N/A

015 1.5-in. (40 mm) 13 25 7 18

020 2-in. (50 mm) 19 17 14 11

025 2.5-in. (65 mm) 22 24 17 16

030 3-in. (80 mm) 34 35 23 23

040 4-in. (100 mm) 26 50 17 32

050 5-in. (125 mm) 36 60 25 35

060 6-in. (150 mm) 45 50 30 37

080 8-in. (200 mm) 60 82 42 55

100 10-in. (250 mm) 55 80 40 70

120 12-in. (300 mm) 65 125 55 105

140 14-in. (350 mm) 85 110 70 95

160 16-in. (400 mm) 85 160 65 140

180 18-in. (450 mm) 120 170 95 150

200 20-in. (500 mm) 110 175 90 150

240 24-in. (600 mm) 165 280 140 250

300

360

Line size

(1)

30-in. (750 mm) 195 415 165 375

(1)

36-in. (900 mm) 280 575 245 525

Class 150

(pound-feet)

Class 300

(pound-feet)

Class 150

(pound-feet)

Class 300

1. Torque values are valid for ASME and AWWA flanges.

Quick Start Guide

Table 5. Flange Bolt Torque and Load Specifications for 8705 (EN 1092-1)

Fluoropolymer liners (in Newton-meters)

Size code Line size PN10 PN 16 PN 25 PN 40

005 0.5-in. (15 mm) N/A N/A N/A 10

010 1-in. (25 mm) N/A N/A N/A 20

015 1.5-in. (40 mm) N/A N/A N/A 50

020 2-in. (50 mm) N/A N/A N/A 60

025 2.5-in. (65 mm) N/A N/A N/A 50

030 3-in. (80 mm) N/A N/A N/A 50

040 4-in. (100 mm) N/A 50 N/A 70

050 5-in. (125 mm) N/A 70 N/A 100

060 6-in. (150mm) N/A 90 N/A 130

080 8-in. (200 mm) 130 90 130 170

100 10-in. (250 mm) 100 130 190 250

120 12-in. (300 mm) 120 170 190 270

140 14-in. (350 mm) 160 220 320 410

160 16-in. (400 mm) 220 280 410 610

180 18-in. (450 mm) 190 340 330 420

200 20-in. (500 mm) 230 380 440 520

240 24-in. (600 mm) 290 570 590 850

Other liners (in Newton-meters)

Size code

010 1-in. (25 mm) N/A N/A N/A 20

015 1.5-in. (40 mm) N/A N/A N/A 30

020 2-in. (50 mm) N/A N/A N/A 40

025 2.5-in. (65 mm) N/A N/A N/A 35

030 3-in. (80 mm) N/A N/A N/A 30

040 4-in. (100 mm) N/A 40 N/A 50

050 5-in. (125 mm) N/A 50 N/A 70

060 6-in. (150 mm) N/A 60 N/A 90

080 8-in. (200 mm) 90 60 90 110

100 10-in. (250 mm) 70 80 130 170

120 12-in. (300 mm) 80 110 130 180

140 14-in. (350 mm) 110 150 210 280

160 16-in. (400 mm) 150 190 280 410

180 18-in. (450 mm) 130 230 220 280

200 20-in. (500 mm) 150 260 300 350

240 24-in. (600 mm) 200 380 390 560

Line size

PN10

PN 16 PN 25 PN 40

August 2015

Quick Start Guide

Wafer sensors

4.3 Gaskets

The sensor requires a gasket at each process connection. The g asket material selected must be compatible with the process fluid and operating conditions. Gaskets are required on each side of a grounding ring. See Figure 9 below.

Note

Metallic or spiral-wound gaskets should not be used as they will damage the liner face of the sensor.

Figure 9. Wafer Gasket Placement

4.4 Alignment

1. On 1.5-in. through 8-in. (40 through 200 mm) line sizes, Rosemount requires installing the alignment spacers to ensure proper centering of the wafer sensor between the process flanges.

2. Insert studs for the bottom side of the sensor between the pipe flanges and center the alignment spacer in the middle of the stud. See Figure 9 for the bolt hole locations recommended for the spacers provided. Stud specifications are listed in Tab le 6.

3. Place the sensor between the flanges. Make sure the alignment spacers are properly centered on the studs. For vertical flow installations, slide the O-ring over the stud to keep the spacer in place. See Figure 9. Ensure the spacers match the flange size and class rating for the process flanges. See Tab le 7 .

4. Insert the remaining studs, washers, and nuts.

5. Tighten to the torque specifications shown in Table 8. Do not over-tighten the bolts or the liner may be damaged.

Quick Start Guide

Table 6. Stud Specifications

Nominal sensor size Stud specifications

1.5 through 8-inch (40 through 200 mm) CS, ASTM A193, Grade B7, threaded mounting studs

Table 7. Rosemount Alignment Spacer Table

Dash no.

(-xxxx)

0A15 1.5 40 JIS 10K-20K

0A20 2 50 JIS 10K-20K

0A30 3 80 JIS 10K

0B15 1.5 40 JIS 40K

AA15 1.5 40 ASME- 150#

AA20 2 50 ASME - 150#

AA30 3 80 ASME - 150#

AA40 4 100 ASME - 150#

AA60 6 150 ASME - 150#

AA80 8 200 ASME - 150#

AB15 1.5 40 ASME - 300#

AB20 2 50 ASME - 300#

AB30 3 80 ASME - 300#

AB40 4 100 ASME - 300#

AB60 6 150 ASME - 300#

AB80 8 200 ASME - 300#

DB40 4 100 EN 1092-1 - PN10/16

DB60 6 150 EN 1092-1 - PN10/16

DB80 8 200 EN 1092-1 - PN10/16

DC80 8 200 EN 1092-1 - PN25

DD15 1.5 40 EN 1092-1 - PN10/16/25/40

DD20 2 50 EN 1092-1 - PN10/16/25/40

DD30 3 80 EN 1092-1 - PN10/16/25/40

DD40 4 100 EN 1092-1 - PN25/40

DD60 6 150 EN 1092-1 - PN25/40

DD80 8 200 EN 1092-1 - PN40

RA80 8 200 AS40871-PN16

RC20 2 50 AS40871-PN21/35

RC30 3 80 AS40871-PN21/35

RC40 4 100 AS40871-PN21/35

RC60 6 150 AS40871-PN21/35

RC80 8 200 AS40871-PN21/35

Line size

Flange rating(in) (mm)

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To order an Alignment Spacer Kit (qty 3 spacers) use p/n 08711-3211-xxxx where xxxx equals the dash number above.

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Quick Start Guide

4.5 Flange bolts

Wafer sensors require threaded studs. See Figure 8 on page 10 for torque sequence. Always check for leaks at the flanges after tightening the flange bolts. All sensors require a second tightening 24 hours after initial flange bolt tightening.

Table 8. Rosemount 8711 Torque Specifications

Size code Line size Pound-feet Newton-meter

015 1.5-in. (40 mm) 15 20

020 2-in. (50 mm) 25 34

030 3-in. (80 mm) 40 54

040 4-in. (100 mm) 30 41

060 6-in. (150 mm) 50 68

080 8-in. (200 mm) 70 95

Step 5: Process reference connection

Figure 10 through Figure 13 illustrate process reference connections only. Earth

safety ground is also required as part of the installation, but is not shown in the figures. Follow national, local, and plant electrical codes for safety ground.

Use Table 9 to determine which process reference option to follow for proper installation.

Table 9. Process Reference Installation

Process reference options

Type of pipe Grounding straps Grounding rings

Conductive

Unlined Pipe

Conductive

Lined Pipe

Non-Conductive

Pipe

1.Grounding ring, reference electrode, and lining protectors are not required for proess reference. Grounding straps per Figure 10 are sufficient.

See Figure 10 See Figure 11

Insufficient Grounding

See Figure 11 See Figure 10 See Figure 11

See Figure 12

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Reference electrode

See Figure 13

Not

Recommen ded

(1)

Lining

protectors

See Figure 11

See Figure 12

(1)

Note

For line sizes 10-inch and larger, the ground strap may come attached to the sensor body near the flange. See Figure 14.

Quick Start Guide

Figure 10. Grounding Straps in Conductive Unlined Pipe or Reference

Electrode in Lined Pipe

Figure 11. Grounding with Grounding Rings or Lining Protectors in

Conductive Pipe

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Figure 12. Grounding with Grounding Rings or Lining Protectors in

Non-conductive Pipe

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