Sierra INNOVA-MASS 240-VT User manual

Series 24-HP Instruction Manual Table of Contents
IM-24-HP 0-1
Sierra Series 240 and 241
Innova-Mass™ Multi-Parameter
Vortex Mass Flow Meters
Models 240-VT, 240-VTP, 241-VT, 241-VTP
Instruction Manual
Part Number: IM-24-HP, Rev. C.2 10/08
CORPORATE HEADQUARTERS
5 Harris Court, Building L Monterey, CA 93940
Phone [phone] [phone] Fax [phone]
www.sierrainstruments.com
EUROPE HEADQUARTERS
Bijlmansweid 2 1934RE Egmond aan den Hoef The Netherlands
Phone [phone] Fax [phone]
ASIA HEADQUARTERS
Room 618, Tomson Centre, Bldg. A
188 Zhang Yang Road
Pu Dong New District, Shanghai, P.R. China
Phone: + 8621 5879 8522 Fax: [phone]

Table of Contents Series 24-HP Instruction Manual
0-2 IM-24-HP
Customer Notice
Unless you have specifically ordered Sierra’s optional O2cleaning, this flow meter
may not be fit for oxygen service. Sierra Instruments, Inc., is not liable for any
damage or personal injury, whatsoever, resulting from the use of Sierra Instru-
ments standard mass flow meters for oxygen gas. You are responsible for clean-
ing the mass flow meter to the degree required for your oxygen flow application.
© COPYRIGHT SIERRA INSTRUMENTS 1997
No part of this publication may be copied or distributed, transmitted, transcribed, stored in
a retrieval system, or translated into any human or computer language, in any form or by
any means, electronic, mechanical, manual, or otherwise, or disclosed to third parties
without the express written permission of Sierra Instruments. The information contained in
this manual is subject to change without notice.
TRADEMARKS
Innova-Mass™ is a trademark of Sierra Instruments, Inc. Other product and company
names listed in this manual are trademarks or trade names of their respective manufac-
turers.

Series 24-HP Instruction Manual Table of Contents
IM-24-HP 0-3
Table of Contents
Chapter 1 Introduction
Innova-Mass™ Vortex Mass Flow Meters..........................................1-1
Using this Manual ......................................................................... 1-1
Note and Safety Information.........................................................1-2
Receipt of System Components ....................................................1-2
Technical Assistance.....................................................................1-2
How the Innova-Mass Vortex Meter Operates....................................1-3
Velocity Measurement/Pressure Drop........................................... 1-3
Temperature Measurement............................................................ 1-6
Pressure Measurement................................................................... 1-7
Flow Meter Configurations..................................................................1-7
Chapter 2 Installation
Installation Overview...........................................................................2-1
Flow Meter Installation Requirements..........................................2-1
Unobstructed Flow Requirements................................................. 2-2
Series 240 In-Line Flow Meter Installation......................................... 2-3
Wafer-Style Flow Meter Installation.............................................2-4
Flange-Style Flow Meter Installation............................................ 2-5
Series 241 Insertion Flow Meter Installation....................................... 2-6
Cold Tap Guidelines......................................................................2-7
Hot Tap Guidelines ....................................................................... 2-8
Flow Meter Insertion ...........................................................................2-9
Installing Meters with a Compression Connection .....................2-10
Installing Meters with a Packing Gland Connection...................2-12
Installing Meters (Packing Gland), No Insertion Tool................2-15
Adjusting Meter Orientation..............................................................2-17
Display/Keypad Adjustment ....................................................... 2-17
Enclosure Adjustment.................................................................2-18
Wiring Connections...........................................................................2-19
Input Power Connections............................................................2-19
4-20 mA Output Connections ..................................................... 2-20
Pulse Output Connections........................................................... 2-21
Alarm Output Connections.......................................................... 2-22
Remote Electronics Wiring.........................................................2-24
Optional Input Electronics Wiring..............................................2-25
Chapter 3 Operating Instructions
Flow Meter Display/Keypad................................................................3-1
Start Up................................................................................................3-2
Using the Setup Menus........................................................................ 3-3
Programming the Flow Meter.......................................................3-3
Output Menu ................................................................................. 3-4
Display Menu................................................................................3-6
Alarms Menu................................................................................. 3-7
Totalizer Menu.............................................................................. 3-8

Table of Contents Series 24-HP Instruction Manual
0-4 IM-24-HP
Energy Menu.......................................................................3-10
Fluid Menu..................................................................................3-11
Units Menu..................................................................................3-12
Time and Date Menu...................................................................3-13
Diagnostics Menu........................................................................3-14
Calibration Menu.........................................................................3-15
Password Menu...........................................................................3-16
Chapter 4 Troubleshooting and Repair
Hidden Diagnostics Menus..................................................................4-1
Column One Hidden Diagnostics Values......................................4-2
Column Two Hidden Diagnostics Values.....................................4-3
Analog Output Calibration ..................................................................4-5
Troubleshooting the Flow Meter .........................................................4-6
Symptom: Output at no Flow........................................................4-6
Symptom: Erratic Output ..............................................................4-6
Symptom: No Output....................................................................4-7
Symptom: Meter Displays Temperature Fault..............................4-7
Symptom: Meter Displays Pressure Fault.....................................4-8
Electronics Assembly Replacement.....................................................4-9
Pressure Sensor Replacement (Series 240 Only) ................................ 4-9
Returning Equipment to the Factory..................................................4-10
Appendix A Product Specifications
Appendix B Glossary
Appendix C Fluid Calculations
Appendix D HART Communication
Appendix E Modbus Communication
Appendix F ATEX-IECEx Specifications
Certificate of Conformance

Series 24-HP Instruction Manual Table of Contents
IM-24-HP 0-5
Figures
1-1. In-Line Vortex Multi-Parameter Mass Flow Meter................1-3
1-2. Measurement Principle of Vortex Flow Meters......................1-4
1-3. Reynolds Number Range of the Innova-Mass........................ 1-6
2-1. Recommended Pipe Length Required for Installation............2-2
2-2. Flange Bolt Torquing Sequence .............................................2-3
2-3. Wafer-Style Flow Meter Installation...................................... 2-4
2-4. Flange-Style Flow Meter Installation.....................................2-5
2-5. Hot Tap Sequence...................................................................2-8
2-6. Insertion Calculation (Compression Type)...........................2-10
2-7. Flow Meter with Compression Type Fitting......................... 2-11
2-8. Insertion Calculation (Meters with Insertion Tool).............. 2-12
2-9. Flow Meter with Permanent Insertion Tool..........................2-13
2-10. Flow Meter with Removable Insertion Tool......................... 2-14
2-11. Insertion Calculation (Meters without Insertion Tool)......... 2-15
2-12. Display/Keypad Viewing Adjustment..................................2-17
2-13. Enclosure Viewing Adjustment............................................ 2-18
2-14. AC Power Connections......................................................... 2-19
2-15. DC Power Connections......................................................... 2-19
2-16. Load Resistance Versus Input Voltage................................. 2-20
2-17. Isolated 4-20 Output with External Power Supply...............2-20
2-18. Non-Isolated 4-20 Output using Input Power Supply .......... 2-21
2-19. Isolated 4-20 Output using Meter Power Supply (AC only) 2-21
2-20. Isolated Pulse Output using External Power Supply............2-22
2-21. Non-Isolated Pulse Output using Input Power Supply.........2-22
2-22. Isolated Pulse Output using Meter Power Supply (AC only)2-22
2-23. Isolated Alarm Output using External Power Supply........... 2-23
2-24 Non-Isolated Alarm Output using Meter Power Supply.......2-23
2-25 Isolated Alarm Output using Meter Power Supply(AC only) 2-24
2-26 Remote Electronics Junction Box Sensor Wiring................. 2-24
3-1. Flow Meter Display/Keypad...................................................3-1
Tables
2-1. Minimum Recommended Stud Bolt Lengths ......................... 2-3

Table of Contents Series 24-HP Instruction Manual
0-6 IM-24-HP
Warnings and Cautions
Warning!
Agency approval for hazardous location installations varies between flow meter models.
Consult the flow meter nameplate for specific flow meter approvals before any hazardous
location installation.
Hot tapping must be performed by a trained professional. U.S. regulations often require a
hot tap permit. The manufacturer of the hot tap equipment and/or the contractor perform-
ing the hot tap is responsible for providing proof of such a permit.
All flow meter connections, isolation valves and fittings for cold/hot tapping must have the
same or higher pressure rating as the main pipeline.
For Series 241 insertion flow meter installations, an insertion tool must be used for any
installation where a flow meter is inserted under pressure greater than 50 psig.
To avoid serious injury, DO NOT loosen a compression fitting under pressure.
To avoid potential electric shock, follow National Electric Code or your local code when
wiring this unit to a power source. Failure to do so could result in injury or death. All AC
power connections must be in accordance with published CE directives. All wiring proce-
dures must be performed with the power Off.
Before attempting any flow meter repair, verify that the line is not pressurized. Always
remove main power before disassembling any part of the mass flow meter.
Caution!
Calibration must be performed by qualified personnel. Sierra Instruments, Inc., strongly re-
commends that you return your flow meter to the factory for calibration.
In order to achieve accurate and repeatable performance, the flow meter must be in-
stalled with the specified minimum length of straight pipe upstream and downstream of
the flow meter’s sensor head.
When using toxic or corrosive gases, purge the line with inert gas for a minimum of four
hours at full gas flow before installing the flow meter.
For Series 241 insertion flow meter installations, the sensor alignment pointer must point
downstream in the direction of flow.
The AC wire insulation temperature rating must meet or exceed 85°C (185°F).

Series 24-HP Instruction Manual Chapter 1 Introduction
IM-24-HP 1-1
Chapter 1 Introduction
Innova-Mass™Multi-Parameter Vortex Mass Flow Meters
The Sierra Instruments’ Series 240 In-Line and the Series 241 Insertion
Innova-Mass™ Vortex Flow Meters provide a reliable solution for
process flow measurement. From a single entry point in the pipeline, In-
nova-Mass meters offer precise measurements of five parameters includ-
ing mass flow, volumetric flow, temperature, pressure and fluid density.
The unique Innova-Mass design reduces fugitive emissions, wiring, star-
tup time and work-force requirements.
Innova-Mass digital electronics allows reconfiguration for most gases,
liquids and steam with generous rangeability. The meter outputs a pulse
signal for remote totalization and up to three 4-20 mA analog signals for
monitoring your choice of the five process variables. The local key-
pad/display provides instantaneous flow rate, total flow, temperature,
pressure and density in engineering units.
The Sierra Series 240 and 241 Innova-Mass Meters’ simple installation
combines with an easy-to-use interface that provides quick set up, long
term reliability and accurate mass flow measurement over a wide range
of flows, pressures and temperatures.
Using This Manual
This manual provides information needed to install and operate both the
Series 240 In-Line and Series 241 Insertion Innova-Mass Flow Meters.
The four chapters of this manual cover these areas:
•Chapter 1 includes the introduction and product description
•Chapter 2 provides information needed for installation
•Chapter 3 describes system operation and programming
•Chapter 4 covers troubleshooting and repair
The product specifications are found in Appendix A. Appendix B con-
tains a glossary of terms. Appendix C provides reference fluid calcula-
tions. Appendix D provides wiring and configuration information for the
Energy meter option.

Chapter 1 Introduction Series 24-HP Instruction Manual
1-2 IM-24-HP
Note and Safety Information
We use note, caution and warning statements throughout this book to
draw your attention to important information.
Warning!
Caution! Note
This statement appears with
information that is important to
protect people and equipment
from damage. Pay very close
attention to all warnings that
apply to your application.
This statement appears with
information that is important
for protecting your equipment
and performance. Read and
follow all cautions that apply
to your application.
This statement appears with a
short message to alert you to
an important detail.
Receipt of System Components
When receiving a Sierra mass flow meter, carefully check the outside
packing carton for damage incurred in shipment. If the carton is dam-
aged, notify the local carrier and submit a report to the factory or distrib-
utor. Remove the packing slip and check that all ordered components are
present. Make sure any spare parts or accessories are not discarded with
the packing material. Do not return any equipment to the factory without
first contacting Sierra Customer Service.
Technical Assistance
If you encounter a problem with your flow meter, review the configura-
tion information for each step of the installation, operation and set up pro-
cedures. Verify that your settings and adjustments are consistent with fac-
tory recommendations. Refer to Chapter 4, Troubleshooting, for specific
information and recommendations.
If the problem persists after following the troubleshooting procedures
outlined in Chapter 4, contact Sierra Instruments, Technical Support at
[phone] or [phone] between 8:00 a.m. and 5:00 p.m.
MST. When calling Technical Support, have the following information
on hand:
•the flow range, serial number and Sierra order number (all
marked on the meter nameplate)
•the problem you are encountering and any corrective action
taken
•application information (gas, pressure, temperature and pip-
ing configuration)

Series 24-HP Instruction Manual Chapter 1 Introduction
IM-24-HP 1-3
How the Innova-Mass Vortex Mass Flow Meter Operates
Figure 1-1. In-Line Vortex Multi-Parameter Mass Flow Meter
Sierra Series 240 and 241 Innova-Mass™ Multi-Parameter Vortex Mass
Flow Meters use a unique sensor head to monitor mass flow rate by di-
rectly measuring three variables–fluid velocity, temperature and pressure.
The built-in flow computer calculates the mass flow rate and volumetric
flow rate based on these three direct measurements. The velocity, tem-
perature and pressure sensing head is built into the vortex meter’s flow
body. To measure fluid velocity, the flow meter incorporates a bluff
body (shedder bar) in the flow stream and measures the frequency of vor-
tices created by the shedder bar. Temperature is measured using a plati-
num resistance temperature detector (PRTD). Pressure measurement is
achieved using a solid-state pressure transducer. All three elements are
combined into an integrated sensor head assembly located downstream of
the shedder bar within the flow body.
Velocity Measurement
The Innova-Mass vortex velocity sensor is a patented mechanical design
that minimizes the effects of pipeline vibration and pump noise, both of
which are common error sources in flow measurement with vortex flow
meters. The velocity measurement is based on the well-known Von Kar-
man vortex shedding phenomenon. Vortices are shed from a shedder bar,
and the vortex velocity sensor located downstream of the shedder bar
senses the passage of these vortices. This method of velocity measurement
has many advantages including inherent linearity, high turndown, reliabil-
ity and simplicity.

Chapter 1 Introduction Series 24-HP Instruction Manual
1-4 IM-24-HP
Vortex Shedding Frequency
Von Karman vortices form downstream of a shedder bar into two distinct
wakes. The vortices of one wake rotate clockwise while those of the oth-
er wake rotate counterclockwise. Vortices generate one at a time, alter-
nating from the left side to the right side of the shedder bar. Vortices in-
teract with their surrounding space by over-powering every other nearby
swirl on the verge of development. Close to the shedder bar, the distance
(or wave length) between vortices is always constant and measurable.
Therefore, the volume encompassed by each vortex remains constant, as
shown below. By sensing the number of vortices passing by the velocity
sensor, the Innova-Mass™ Flow Meter computes the total fluid volume.
Vortex shedder bar
Flow
Vortices
Velocity sensor
Constant
wave length
Figure 1-2. Measurement Principle of Vortex Flow Meters
Vortex Frequency Sensing
The velocity sensor incorporates a piezoelectric element that senses the
vortex frequency. This element detects the alternating lift forces pro-
duced by the Von Karman vortices flowing downstream of the vortex
shedder bar. The alternating electric charge generated by the piezoelec-
tric element is processed by the transmitter’s electronic circuit to obtain
the vortex shedding frequency. The piezoelectric element is highly sensi-
tive and operates over a wide range of flows, pressures and temperatures.

Series 24-HP Instruction Manual Chapter 1 Introduction
IM-24-HP 1-5
Re = ρV D
μ
St = f d
V
Flow Velocity Range
To ensure trouble-free operation, vortex flow meters must be correctly
sized so that the flow velocity range through the meter lies within the
measurable velocity range (with acceptable pressure drop) and the linear
range.
The measurable range is defined by the minimum and maximum velocity
using the following table.
Gas Liquid
Vmin 25
ρ
ft/s
1 ft/s
English
ρ (lb/ft3)
Vmax 300 ft/s 30 ft/s
Vmin 37
ρ
m/s
0.3 m/s
Metric
ρ (kg/m3)
Vmax 91 m/s 9.1 m/s
The pressure drop for series 241 insertion meters is negligible. The pressure
drop for series 240 in-line meters is defined as:
ΔP = .00024 ρV2 English units (ΔP in psi, ρin lb/ft3, V in ft/sec)
ΔP = .000011 ρV2 Metric units (ΔP in bar, ρin kg/m3, V in m/sec)
The linear range is defined by the Reynolds number. The Reynolds number is the
ratio of the inertial forces to the viscous forces in a flowing fluid and is defined
as:
Where
Re = Reynolds Number
ρ= mass density of the fluid being measured
V = velocity of the fluid being measured
D = internal diameter of the flow channel
μ= viscosity of the fluid being measured
The Strouhal number is the other dimensionless number that quantifies the
vortex phenomenon. The Strouhal number is defined as:
Where
St = Strouhal Number
f = frequency of vortex shedding
d = shedder bar width
V = fluid velocity

Chapter 1 Introduction Series 24-HP Instruction Manual
1-6 IM-24-HP
As shown in Figure 1-3, Innova-Mass™ meters exhibit a constant
Strouhal number across a large range of Reynolds numbers, indicating a
consistent linear output over a wide range of flows and fluid types. Be-
low this linear range, the intelligent electronics in Innova-Mass automat-
ically corrects for the variation in the Strouhal number with the Reynolds
number. The meter’s smart electronics corrects for this non-linearity via
its simultaneous measurements of the process fluid temperature and pres-
sure. This data is then used to calculate the Reynolds number in real
time. Innova-Mass meters automatically correct down to a Reynolds
number of 5,000.
0.3
0.2
0.1
0.0 34
10
Linear range
Reynolds Number, Re
Strouhal Number, St
10 5 10 108 106107
5000
Corrected range
Figure 1-3. Reynolds Number Range for the Innova-Mass
Temperature Measurement
Innova-Mass Flow Meters use a 1000 ohm platinum resistance temperature
detector (PRTD) to measure fluid temperature.

Series 24-HP Instruction Manual Chapter 1 Introduction
IM-24-HP 1-7
Pressure Measurement
Innova-Mass Flow Meters incorporate a solid-state pressure transducer
isolated by a 316 stainless steel diaphragm. The transducer itself is mi-
cro-machined silicon, fabricated using integrated circuit processing tech-
nology. A nine-point pressure/temperature calibration is performed on
every sensor. Digital compensation allows these transducers to operate
within a 0.3% of full scale accuracy band within the entire ambient tem-
perature range of -4°F to 140°F. Thermal isolation of the pressure trans-
ducer ensures the same accuracy across the allowable process fluid tem-
perature range of -40°F to 750°F.
Flow Meter Configurations
Innova-Mass™ Vortex Mass Flow Meters are available in two
configurations:
•Series 240 in-line flow meter (replaces a section of the pipeline)
•Series 241 insertion flow meter (requires a “cold” tap or a “hot” tap
into an existing pipeline)
Both the in-line and insertion configurations are similar in that they both
use identical electronics and have similar sensor heads. Besides installa-
tion differences, the main difference between an in-line flow meter and
an insertion flow meter is their method of measurement.
For an in-line vortex flow meter, the shedder bar is located across the en-
tire diameter of the flow body. Thus, the entire pipeline flow is included
in the vortex formation and measurement. The sensing head, which di-
rectly measures velocity, temperature and pressure is located just down-
stream of the shedder bar.
Insertion vortex flow meters have a shedder bar located across the diame-
ter of a short tube. The velocity, temperature and pressure sensor are lo-
cated within this tube just downstream of a built-in shedder bar. This en-
tire assembly is called the insertion sensing head. It fits through any en-
try port with a 1.875 inch minimum internal diameter.
The sensing head of an insertion vortex flow meter directly monitors the
velocity at a point in the cross-sectional area of a pipe, duct, or stack (re-
ferred to as “channels”). The velocity at a point in the pipe varies as a func-
tion of the Reynolds number. The insertion vortex flow meter computes the
Reynolds number and then computes the total flow rate in the channel. The
output signal of insertion meters is the total flow rate in the channel. The
accuracy of the total flow rate computation depends on adherence to the
piping installation requirements given in Chapter 2. If adherence to those
guidelines cannot be met, contact the factory for specific installation ad-
vice.

Chapter 1 Introduction Series 24-HP Instruction Manual
1-8 IM-24-HP
Flow Meter Electronics
Innova-Mass Flow Meter electronics are available mounted directly to
the flow body, or remotely mounted. The electronics housing may be
used indoors or outdoors, including wet environments. Power require-
ments are 100 milliamps at 12-36 VDC. An optional AC powered unit is
available. Three analog output signals are available for your choice of
three of the five process variables: mass flow rate, volumetric flow rate,
temperature, pressure or fluid density.
Innova-Mass Flow Meters include a local 2 x 16 character LCD display
housed within the enclosure. Local operation and reconfiguration is ac-
complished using six pushbuttons operated via finger touch. For hazard-
ous locations, the six buttons can be operated with the electronics enclo-
sure sealed using a hand-held magnet, thereby not compromising the in-
tegrity of the hazardous location certification.
The electronics include nonvolatile memory that stores all configuration
information. The nonvolatile memory allows the flow meter to function
immediately upon power up, or after an interruption in power.

Series 24-HP Instruction Manual Chapter 2 Installation
IM-24-HP 2-1
Chapter 2 Installation
Installation Overview
Sierra’s Innova-Mass Vortex Flow Meter installations are simple and
straightforward. Both the Series 240 In-Line and Series 241 Insertion type
flow meter installations are covered in this chapter. After reviewing the
installation requirements given below, see page 2-3 for Series 240 instal-
lation instructions. See page 2-6 for Series 241 installation instructions.
Wiring instructions begin on page 2-19.
Flow Meter Installation Requirements
Before installing the flow meter, verify the installation site allows for
these considerations:
1. Line pressure and temperature will not exceed the flow meter
rating.
2. The location meets the required minimum number of pipe diame-
ters upstream and downstream of the sensor head as illustrated
Figure 2-1.
3. Safe and convenient access with adequate overhead clear-
ance for maintenance purposes.
4. Verify that the cable entry into the instrument meets the
specific standard required for hazardous area installations.
5. For remote installations, verify the supplied cable length is
sufficient to connect the flow meter sensor to the remote
electronics.
Also, before installation check your flow system for anomalies such as:
•leaks
•valves or restrictions in the flow path that could create distur-
bances in the flow profile that might cause unexpected flow rate
indications
Warning!
Consult the flow meter namep-
late for specific flow meter ap-
provals before any hazardous
location installation.

Chapter 2 Installation Series 24-HP Instruction Manual
2-2 IM-24-HP
Unobstructed Flow Requirements
Select an installation site that will minimize possible distortion in the flow
profile. Valves, elbows, control valves and other piping components may
cause flow disturbances. Check your specific piping condition against the
examples shown below. In order to achieve accurate and repeatable per-
formance install the flow meter using the recommended number of
straight run pipe diameters upstream and downstream of the sensor.
Note: For liquid applications in vertical pipes, avoid installing with flow
in the downward direction because the pipe may not be full at all points.
Choose to install the meter with flow in the upward direction if possible.
Flow meter
AB
Example 1.
One 90° elbow before meter
C' Flow meter
AB
C
Flow conditioner
(if used)
Example 2.
Two 90° elbows before meter in one plane
C' Flow meter
AB
C
Flow conditioner
(if used)
Example 3.
Two 90° elbows before meter out of plane (if three
90° bends present, double recommended length)
Flow meter
AB
Example 4.
Reduction before meter
C' C
Flow conditioner
(if used)
Flow meter
AB
C' C
Flow conditioner
(if used)
Example 5.
Expansion before meter
Example 6.
Regulator or valve partially closed before meter
(If valve is always wide open, base length
requirements on fitting directly preceding it)
Flow meter
AB
C' C
Flow conditioner (if used)
Minimum Required
Upstream Diameters Minimum Required Downstream Diameters
No Flow
Conditioner With Flow Conditioner No Flow Conditioner With Flow Conditioner
Example A A C C´ B B
1 10 D N/A N/A N/A 5 D 5 D
2 15 D 10 D 5 D 5 D 5 D 5 D
3 25 D 10 D 5 D 5 D 10 D 5 D
4 10 D 10 D 5 D 5 D 5 D 5 D
5 20 D 10 D 5 D 5 D 5 D 5 D
6 25 D 10 D 5 D 5 D 10 D 5 D
D = Internal diameter of channel. N/A = Not applicable
Figure 2-1. Recommended Pipe Length Requirements for Installation, Series 240 and 241

Series 24-HP Instruction Manual Chapter 2 Installation
IM-24-HP 2-3
Series 240 In-Line Flow Meter Installation
Install the Series 240 In-Line Flow Meter between two conventional pipe
flanges as shown in Figures 2-3 and 2-4. Table 2-1 provides the recom-
mended minimum stud bolt lengths for wafer-style meter body size and
different flange ratings.
The meter inside diameter is equal to the same size nominal pipe ID in
schedule 80. For example, a 2” meter has an ID of 1.939” (2” schedule
80). Do not install the meter in a pipe with an inside diameter smaller
than the inside diameter of the meter. For schedule 160 and higher
pipe, a special meter is required. Consult the factory before purchasing
the meter.
Series 240 Meters require customer-supplied gaskets. When selecting
gasket material make sure that it is compatible with the process fluid and
pressure ratings of the specific installation. Verify that the inside diameter
of the gasket is larger than the inside diameter of the flow meter and adja-
cent piping. If the gasket material extends into the flow stream, it will dis-
turb the flow and cause inaccurate measurements.
Flange Bolt Specifications
Stud Bolt Lengths for Each Flange Rating (inches)
Line Size Class 150 Class 300 Class 600
1 inch 6.00 7.00 7.50
1.5 inch 6.25 8.50 9.00
2 inch 8.50 8.75 9.50
3 inch 9.00 10.00 10.50
4 inch 9.50 10.75 12.25
Table 2-1. Minimum Recommended Stud Bolt Lengths for Wafer Meters
The required bolt load for sealing the gasket joint is affected by several
application-dependent factors, therefore the required torque for each ap-
plication may be different. Refer to the ASME Pressure Vessel Code
guidelines for bolt tightening standards.
1
2
34
1
2
34
5
67
8
15
9
3
7
11
2
6
10
4
8
12
4-bolt 8-bolt 12-bolt
Figure 2-2. Flange Bolt Torquing Sequence

Chapter 2 Installation Series 24-HP Instruction Manual
2-4 IM-24-HP
Wafer-Style Flow Meter Installation
Install the wafer-style meter between two conventional pipe flanges of the
same nominal size as the flow meter. If the process fluid is a liquid, make
sure the meter is located where the pipe is always full. This may require
locating the meter at a low point in the piping system. Note: Vortex flow
meters are not suitable for two-phase flows (i.e., liquid and gas mixtures).
For horizontal pipelines having a process temperature above 300° F,
mount the meter at a 45 or 90-degree angle to avoid overheating the elec-
tronics enclosure. To adjust the viewing angle of the enclosure or dis-
play/keypad, see page 2-17.
Figure 2-3. Wafer-Style Flow Meter Installation
When installing the meter make sure the section marked “inlet” is positioned
upstream of the outlet, facing the flow. This ensures that the sensor head is
positioned downstream of the vortex shedder bar and is correctly aligned to
the flow. Installing the meter opposite this direction will result in completely
inaccurate flow measurement. To install the meter:
1. Turn off the flow of process gas, liquid or steam. Verify that the line
is not pressurized. Confirm that the installation site meets the required
minimum upstream and downstream pipe diameters.
2. Insert the studs for the bottom side of the meter body between the pipe
flanges. Place the wafer-style meter body between the flanges with the
end stamped “inlet” facing flow. Center the meter body inside the di-
ameter with respect to the inside diameter of the adjoining piping.
3. Position the gasket material between the mating surfaces. Make sure
both gaskets are smooth and even with no gasket material extending in-
to the flow profile. Obstructions in the pipeline will disturb the flow and
cause inaccurate measurements
4. Place the remaining studs between the pipe flanges. Tighten the nuts in
the sequence shown in Figure 2-2. Check for leaks after tightening the
flange bolts
Caution!
When using toxic or cor-
rosive gases, purge the
line with inert gas for a
minimum of four hours
at full gas flow before
installing the flow meter.

Series 24-HP Instruction Manual Chapter 2 Installation
IM-24-HP 2-5
Flange-Style Flow Meter Installation
Install the flange-style meter between two conventional pipe flanges of
the same nominal size as the flow meter. If the process fluid is a liquid,
make sure the meter is located where the pipe is always full. This may re-
quire locating the meter at a low point in the piping system. Note: Vortex
flow meters are not suitable for two-phase flows (i.e., liquid and gas mix-
tures). For horizontal pipelines having a process temperature above 300°
F, mount the meter at a 45 or 90-degree angle to avoid overheating the
electronics enclosure. To adjust the viewing angle of the enclosure or dis-
play/keypad, see page 2-17.
Figure 2-4. Flange-Style Flow Meter Installation
When installing the meter make sure the flange marked “inlet” is positioned
upstream of the outlet flange, facing the flow. This ensures that the sensor
head is positioned downstream of the vortex shedder bar and is correctly
aligned to the flow. Installing the meter opposite this direction will result in
completely inaccurate flow measurement. To install the meter:
1. Turn off the flow of process gas, liquid or steam. Verify that the line
is not pressurized. Confirm that the installation site meets the required
minimum upstream and downstream pipe diameters.
2. Seat the meter level and square on the mating connections with the flange
marked “inlet” facing the flow. Position a gasket in place for each side.
Make sure both gaskets are smooth and even with no gasket material ex-
tending into the flow profile. Obstructions in the pipeline will disturb the
flow and cause inaccurate measurements.
3. Install bolts in both process connections. Tighten the nuts in the se-
quence shown in Figure 2-2. Check for leaks after tightening the flange
bolts.
Caution!
When using toxic or corro-
sive gases, purge the line
with inert gas for a mini-
mum of four hours at full
gas flow before installing
the flow meter.

Chapter 2 Installation Series 24-HP Instruction Manual
2-6 IM-24-HP
Series 241 Insertion Flow Meter Installation
Prepare the pipeline for installation using either a cold tap or hot tap me-
thod described on the following pages. Refer to a standard code for all
pipe tapping operations. The following tapping instructions are general in
nature and intended for guideline purposes only. Before installing the me-
ter, review the mounting position and isolation value requirements given
below.
Mounting Position
Allow clearance between the electronics enclosure top and any other ob-
struction when the meter is fully retracted.
Isolation Valve Selection
An isolation valve is available as an option with Series 241 meters. If you
supply the isolation valve, it must meet the following requirements:
1. A minimum valve bore di-
ameter of 1.875 inches is re-
quired, and the valve’s body
size should be two inches.
Normally, gate valves are
used.
2. Verify that the valve’s body
and flange rating are within
the flow meter’s maximum
operating pressure and tem-
perature.
3. Choose an isolation valve with at least two inches existing between
the flange face and the gate portion of the valve. This ensures that the
flow meter’s sensor head will not interfere with the operation of the
isolation valve.
1.875-inch min.
valve bore
2-inch min.
2-inch
valve size
Isolation Valve Requirements