Rosemount Quick Start Guide: Magnetic Flow Meter System for Utility, Water, and Wastewater Applications - Model 8750WB | Rosemount Manuals & Guides

Quick Start Guide

00825-0200-4750, Rev AA

February 2014

Rosemount 8750WB Magnetic Flowmeter
System

for Utility, Water, and Wastewater Applications

Quick Start Guide

February 2014

NOTICE

This document provides basic installation guidelines for the Rosemount® 8750W Magnetic
Flowmeter System. For comprehensive instructions, for detailed configuration, diagnostics,
maintenance, service, installation or troubleshooting, refer to the Rosemount 8750W
reference manual (document number 00809-0100-4750 Rev. BA). The manual and this QSG
are also available electronically on 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 that the operating environment of the sensor and transmitter is consistent with the

operating environment.

 Do not connect a Rosemount transmitter to a non-Rosemount sensor that is located in an

explosive atmosphere.

 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 frequent removal is anticipated, take precautions to protect the liner ends. Short spool

pieces attached to the sensor ends are often used for protection.

 Rosemount Magnetic Flowmeters ordered with non-standard paint options 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.

 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.

Contents

Pre-installation . . . . . . . . . . . . . . page 3

Handling . . . . . . . . . . . . . . . . . . . page 7

Mounting . . . . . . . . . . . . . . . . . .page 8

Installation . . . . . . . . . . . . . . . . page 10

Grounding . . . . . . . . . . . . . . . .page 15

Wiring . . . . . . . . . . . . . . . . . . . . page 17

Basic configuration . . . . . . . . .page 28

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February 2014

Quick Start Guide

Step 1: Pre-installation

Before installing the Rosemount 8750W Flowmeter, 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

Mechanical considerations

The mounting site for the Rosemount 8750W transmitter should provide enough
room for secure mounting, easy access to conduit ports, full opening of the
transmitter covers, and easy readability of the LOI screen (see

Figure 2).

If the Rosemount 8750W transmitter is mounted separately from the sensor, it
may not be subject to the same limitations that apply to the sensor.

Figure 1. Field mount transmitter dimensional drawing

7.49 (190)

6.48 (165)

LOI Cover

Figure 1 and

1

/2”-14 NPT (3 places)*

1

/2”-14 NPT (2 places)*

5.82

(148)

8.81

(224)

4.97

(126)

3.00
(76)

3.07
(78)

4.97

(126)

NOTICE

*Non- standard conduit entry thread. M20 connections are available with the use of threaded

conduit adapters.

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Quick Start Guide

Figure 2. Wall mount transmitter dimensional drawing

WITH STANDARD COVER

February 2014

4.31

(109)

2.96
(75)

9.01

(229)

2.81
(71)

WITH LOI COVER

3.11
(79)

11.15
(283)

0.44
(11)

12.02
(305)

4

Ground Lug

NOTE

Dimensions are in inches (millimeters)

1

/2–14 NPT

Conduit

Connection

(4 Places)

LOI Keypad

Cover

February 2014

Quick Start Guide

Environmental considerations

To ensure maximum transmitter life, avoid extreme temperature and excessive
vibration. Typical problem areas:

 high-vibration lines with integrally mounted transmitters
 warm-climate installations in direct sunlight
 outdoor installations in cold climates.

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

Both remotely and integrally mounted Rosemount 8750W transmitters require
external power so there must be access to a suitable power source.

Installation procedures

Rosemount 8750W installation includes both detailed mechanical and electrical
installation procedures.

Mount the transmitter

At a remote site the transmitter may be mounted on a pipe up to two inches in
diameter or against a flat surface.

Pipe mounting

To mount the transmitter on a pipe:

1. Attach the mounting bracket to the pipe using the mounting hardware.

2. Attach the Rosemount 8750W transmitter to the mounting bracket using the
mounting screws.

Identify options and configurations

The standard application of the 8750W includes a 4–20 mA output and control of
the sensor coils and electrodes. Other applications may require one or more of
the following configurations or options:

 HART Multidrop Configuration
 Discrete Output
 Discrete Input
 Pulse Output

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

5

Quick Start Guide

Hardware jumpers/switches

The 8750W electronics board is equipped with user-selectable hardware switches
depending on the transmitter model ordered. These switches set the Failure
Alarm Mode, Internal/External Analog Power, Internal/External Pulse Power and
Transmitter Security. The standard configuration for these switches when
shipped from the factory is as follows:

Failure Alarm Mode: HIGH

Internal/External Analog Power: INTERNAL

Internal/External Pulse Power: EXTERNAL (Field Mount only)

Transmitter Security: OFF

Changing hardware switch settings

In most cases, it will not be necessary to change the setting of the hardware
switches. If the switch settings need to be changed, follow the steps outlined in
the manual.

Use a non-metallic tool to move switch positions.

Electrical considerations

Before making any electrical connections to the Rosemount 8750W, 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.

February 2014

Rotate transmitter housing

The Field Mount transmitter housing can be rotated on the sensor in 90°
increments by removing the four mounting bolts on the bottom of the housing.
Do not rotate the housing more than 180 ° 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.

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February 2014

Quick Start Guide

Step 2: Handling

Handle all parts carefully to prevent damage. Whenever possible, transport the
system to the installation site in the original shipping containers. Rosemount flow
sensors are shipped with end covers that protect it from mechanical damage. For
PTFE lined sensors the cover also prevents normal liner relaxation. Remove the
end covers just before installation.

Figure 3. Rosemount 8750W flanged sensor support for handling

½- through 4-Inch Sensors

5-Inch and Larger Sensors

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Quick Start Guide

Step 3: Mounting

Upstream/downstream piping

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

Figure 4. Upstream and downstream straight pipe diameters

5 Pipe Diameters

Flow

Installations with reduced upstream and downstream straight runs are possible.
In reduced straight run installations, absolute performance may shift. Reported
flow rates will still be highly repeatable.

The sensor should be mounted so the FORWARD end of the flow arrow points in
the direction of flow through the sensor (see

Figure 5).

Figure 4).

2 Pipe Diameters

February 2014

Figure 5. Flow direction

8

February 2014

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.

Figure 6. Sensor orientation

FLOW

FLOW

Quick Start Guide

Mounting position

The electrodes in the sensor are properly orientated when the two measurement
electrodes are in the 3 and 9 o’clock position or within 45 ° from the vertical, as
shown on the right of
measurement electrodes are in the 6 and 12 o’clock position as shown on the left
of

Figure 7.

Figure 7. Avoid any mounting orientation where the two

Figure 7. Sensor mounting position

Incorrect Correct

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Quick Start Guide

February 2014

Step 4: Installation

Flanged sensors

Gaskets

The sensor requires a gasket at each of its connections to adjacent devices or piping.
The gasket material selected must be compatible with the process fluid and operating
conditions. Gaskets are required on each side of a grounding ring. All other
applications (including sensors with lining protectors or a grounding electrode)
require only one gasket on each end connection.

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 8. Flanged gasket placement

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February 2014

Quick Start Guide

Flange bolts

Do not bolt one side at a time. Tighten each side 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

page 12. 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
Repeat the process on the downstream side of the sensor. For sensors with more
or less 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 or until the leak between the process and sensor flanges stop.

If leakage has not stopped 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 the user 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. Sensors require a second
tightening 24 hours after the initial installation. Over time, sensor liner materials
may deform under pressure.

Figure 9 on page 11 to 20% of the suggested torque values.

Table 1 on

Figure 9. Flange bolt torquing sequence

For torque values not listed in Table 1, Table 2, or Table 3, contact technical
support.

11

Quick Start Guide

Table 1. Suggested flange bolt torque values for ASME

PTFE liner Neoprene liner

Size code Line size

005 0.5 inch (15 mm) 8 8 - -

010 1 inch (25 mm) 8 12 - -

015 1.5 inch (40 mm) 13 25 7 18

020 2 inch (50 mm) 19 17 14 11

025 2.5 inch (65 mm) 22 24 17 16

030 3 inch (80 mm) 34 35 23 23

040 4 inch (100 mm) 26 50 17 32

050 5 inch (125 mm) 36 60 25 35

060 6 inch (150 mm) 45 50 30 37

080 8 inch (200 mm) 60 82 42 55

100 10 inch (250 mm) 55 80 40 70

120 12 inch (300 mm) 65 125 55 105

140 14 inch (350 mm) 85 110 70 95

160 16 inch (400 mm) 85 160 65 140

180 18 inch (450 mm) 120 170 95 150

200 20 inch (500 mm) 110 175 90 150

240 24 inch (600 mm) 165 280 140 250

300 30 inch (750 mm) 195 415 165 375

360 36 inch (900 mm) 280 575 245 525

Class 150

(pound-feet)

Class 300

(pound-feet)

Class 150

(pound-feet)

February 2014

Class 300

(pound-feet)

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February 2014

Table 2. Suggested flange bolt torque values for EN1092-1

PTFE liner

Size

code

005

010

015

020

025

030

040

050

060

080

100

120

140

160

180

200

240

Line size

0.5-inch

(15 mm)

1 inch

(25 mm)

1.5 inch

(40 mm)

2 inch

(50 mm)

2.5 inch

(65 mm)

3 inch

(80 mm)

4 inch

(100 mm)

5.0 inch

(125 mm)

6 inch

(150mm)

8 inch

(200 mm)

10 inch

(250 mm)

12 inch

(300 mm)

14 inch

(350 mm)

16 inch

(400 mm)

18 inch

(450 mm)

20 inch

(500 mm)

24 inch

(600 mm)

PN10 PN 16 PN 25 PN 40

(Newton-meter) (Newton-meter) (Newton-meter) (Newton-meter)

50 70

70 100

90 130

130 90 130 170

100 130 190 250

120 170 190 270

160 220 320 410

220 280 410 610

190 340 330 420

230 380 440 520

290 570 590 850

Quick Start Guide

10

20

50

60

50

50

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Quick Start Guide

February 2014

Table 2. (cont) Suggested flange bolt torque values for EN1092-1

Neoprene liner

Size

code

010

015

020

025

030

040

050

060

080

100

120

140

160

180

200

240

Line size

1 inch

(25 mm)

1.5 inch

(40 mm)

2 inch

(50 mm)

2.5 inch

(65 mm)

3 inch

(80 mm)

4 inch

(100 mm)

5.0 inch

(125 mm)

6 inch

(150 mm)

8 inch

(200 mm)

10 inch

(250 mm)

12 inch

(300 mm)

14 inch

(350 mm)

16 inch

(400 mm)

18 inch

(450 mm)

20 inch

(500 mm)

24 inch

(600 mm)

PN 10 PN 16 PN 25 PN 40

(Newton-meter) (Newton-meter) (Newton-meter) (Newton-meter)

40 50

50 70

60 90

90 60 90 110

70 80 130 170

80 110 130 180

110 150 210 280

150 190 280 410

130 230 220 280

150 260 300 350

200 380 390 560

20

30

40

35

30

Table 3. Flange bolt torque and load specifications for large line sizes

AWWA C207 (Ft-Lbs) EN1092-1 (N-m)

40-in. (1000 mm)

42-in. (1050 mm)

48-in. (1200 mm)

AS2129 (N-m) AS4087 (N-m)

40-in. (1000 mm)

48-in. (1200 mm)

Class D

Class E

Class D

Class E

Class D

Class E

Table D

Table E

Table D

Table E

757

757 PN10 413

839 PN16 478

839

872 PN10 622

872

614

652 PN21 515

786

839 PN21 840

40-in. (1000 mm)

48-in. (1200 mm)

40-in. (1000 mm)

48-in. (1200 mm)

14

PN6 208

PN6 375

PN16 612

PN16 785