McCrometer FPI Mag 394L User manual

Important Information:
Converter Model Number: ________________________
Converter Serial Number: _________________________
Meter Serial Number: ____________________________
RETAIN THIS MANUAL - DO NOT DISCARD
Full Prole Insertion
Electromagnetic Flow Meter
Models 394L & 395L
Sensor Installation, Operation
and Maintenance Manual
30120-48 Rev. 2.4
November 5, 2018

Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
Contents
SAFETY ....................................................................................1
Safety Symbols .......................................................................1
Safety Warnings ......................................................................1
1.0 UNPACKING AND VERIFYING COMPONENTS ...........................................2
1.1 Unpack the Shipping Box and Verify Contents......................................2
1.2 Verify Serial Numbers ............................................................3
1.3 Verify Information On Cable Tags..................................................3
1.4 Tools Required for Installation ....................................................4
2.0 SENSOR PROBE INSTALLATION ........................................................4
STEP 1: Sensor Parts List with Part Numbers ............................................5
STEP 2: Detach The Cable Quick Connects...............................................7
STEP 3: Verify Sensor Installation Location - Upstream And Downstream Straight-Pipe Run
Recommendations ...............................................................7
STEP 4: Verify Sucient Installation Clearance From Obstructions ........................9
STEP 5: Pipe Valve Installation ........................................................10
STEP 6: Ensure correct sensor orientation ..............................................11
STEP 7: Optional Compression Seal Disassembly For Installation Of Large Sensors .......11
STEP 8: Sensor Installation Onto Pipe Valve ............................................12
STEP 9: Sensor Re-assembly After Optional Compression Seal Assembly Installation .....13
STEP 10: Insert The Sensor ............................................................14
STEP 11: Using The Sensor Insertion Tool - Optional ....................................15
STEP 12: Applying A Compression Load To The Sensor ..................................16
STEP 13: Installing The Short Retaining Rods...........................................17
STEP 14: Attaching the Ground Wire ...................................................18
3.0 SENSOR REMOVAL...................................................................19
4.0 ELECTRONICS INSTALLATION ........................................................20
5.0 MAINTENANCE ......................................................................20
6.0 SPECIFICATIONS.....................................................................21
7.0 RETURNING A UNIT FOR REPAIR ......................................................22
WARRANTY STATEMENT ...................................................................23

SAFETY
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
1
Safety Warnings
When installing, operating, and maintaining McCrometer equipment where hazards may be present, you must
protect yourself by wearing Personal Protective Equipment (PPE) and be trained to enter conned spaces.
Examples of conned spaces are manholes, pumping stations, pipelines, pits, septic tanks, sewage digesters,
vaults, degreasers, storage tanks, boilers, and furnaces.
You must follow all state and local laws, as well as Occupational Safety and Health Administration (OSHA)
regulations concerning Personal Protective Equipment, conned-space entry, and exposure to bloodborne
pathogens. Specic requirements can be found in the OSHA section of the Code of Federal Regulations: 29 CFR,
1910.132 - 1910.140, Personal Protective Equipment; CFR Title 29, Part 1910.146, Permit-Required Conned-Spaces; and
29 CFR, 1910.1030, Bloodborne Pathogens.
SAFETY
Safety Symbols
Throughout this manual are safety warning and caution information boxes. Each warning and caution box will be
identied by a large symbol indicating the type of information contained in the box. The symbols are explained
below:
!
i
This symbol indicates important safety information. Failure to follow the instructions can
result in serious injury or death.
This symbol indicates important information. Failure to follow the instructions can result in
permanent damage to the meter or installation site.
WARNING!
Incorrect installation or removal of FPI Mag meters can result in serious injury or death. Read the
instructions in this manual on the proper procedures carefully.
!
WARNING!
Never enter a conned space without testing the air at the top, middle, and bottom of the space. The
air may be toxic, oxygen decient, or explosive. Do not trust your senses to determine if the air is safe. You
cannot see or smell many toxic gases.
!
WARNING!
Never enter a conned space without the proper safety equipment. You may need a respirator, gas
detector, tripod, lifeline, and other safety equipment.
!
WARNING!
Pressurized pipes should only be hot tapped, cut, or drilled by qualied personnel. If possible,
depressurize and drain the pipe before attempting any installation.
!
WARNING!
Carefully read all safety warning tags attached to the meter.
!
WARNING!
Never enter a conned space without standby/rescue personnel within earshot. Standby/rescue
personnel must know what action to take in case of an emergency.
!

uNPACKING AND VERIFYING COMPONENTS
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
2
1.0 UNPACKING AND VERIFYING COMPONENTS
The FPI Mag® (Full Prole Insertion) ow meter provides accurate ow measurement for full-pipe clean water
applications. The electromagnetic sensor automatically senses and corrects for shifting velocity in the pipe by
constantly obtaining an area weighted mean velocity. Model 394L is a forward and reverse ow measurement
sensor, and the 395L is a forward only ow measurement sensor. The instrument has all of the features needed to
suit a wide variety of applications.
The ow meter is comprised of the innovative FPI Mag sensor (item #1 below) and a converter (item #4 below). For
converter installation instructions, see the manual provided for the converter purchased with your system.
The sensor is easily installed without service interruption, and requires no site calibration. Installation without
service interruption can be done only when adhering to safe hot-tapping procedures, or in locations already tted
with an appropriate full port ball valve, corporation stop or gate valve.
1.1 Unpack the Shipping Box and Verify Contents
Upon receiving the meter, unpack the contents of the shipping box and verify that the items in Figure 1 are
included.
NOTE: If any of the above-listed items are not present, contact the factory before continuing with installation.
Item # Qty. Description
1 2 Long threaded insertion rods
2 1 FPI Mag Sensor
3 2
Cables with Quick-Connects
(Compression cable glands are
available as an option)
4 1 FPI Mag Installation Operation and
Maintenance Manual
5 1 Converter Installation Operation and
maintenance Manual
6 2 9/16" or 3/4" reversible ratchet
wrench
7 1 Pipe thread sealant
8 8 Hex nut (3/8" or 1/2")
9 4 Locking cotter pin
10 1 Power cord (8', 115 VAC)
11 2 Protective cap for retaining rods
12 2 Short threaded retaining rods
13 1 Converter (M Series or L Series)
14 1 Stainless Steel ball valve & SS nipple
15 1 Calibration Certicate
Figure 1. Shipping Box Contents
3
14
1
2
12
15
11
13
4-10
Note: Do not discard the protective end caps (item 11). They will
be needed when the sensor is fully installed. See STEP 13.
i

uNPACKING AND VERIFYING COMPONENTS
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
3
The tag on the side of the converter has the Converter Model Number, the Converter Serial Number and the Meter
Serial Number. An example is shown below as Figure 3.
Figure 2. Meter Serial Number Tag
Figure 3. Converter Serial Number Tag
IMPORTANT: Verify the meter serial numbers on both the converter and sensor match. If the Meter Serial
Numbers do not match, contact the factory before continuing with the installation.
i
1.2 Verify Serial Numbers
The FPI Mag ow meter is comprised of two primary components: the sensor and the converter. The converter
and sensor are supplied as a custom calibrated matched system. Verify the system serial numbers on both the
converter and sensor match. This will ensure a properly calibrated system.
The Meter Serial Number is located on the side of the sensor body on a silver label. An example is shown below
as Figure 2.
Converter Model: 880003xxx
Converter SN: E12-34567
Meter Model: FPI 395L
Meter SN: MI12-0448
http://www.mccrometer.com
USC
®
MI12-0448
MANUFACTURED: JANUARY 2013
MAXIMUM WATTAGE: 20W
FOREIGN PATENTS PENDING
U.S. PATENT 8,136,410
3255 W. STETSON AVE., HEMET CA 92545 USA
PH [phone] • http://www.mccrometer.com
1.3 Verify Information On Cable Tags
The converter cable has two tags located near where the cable enters
the converter as shown in Figure 4. Verify the following information
is consistent with the specications provided at the time of order:
Figure 4. Cables with CableTags
Tag 1
Meter Serial Number
Pipe I.D. (millimeters)
KA Factor
Tag 2
Pipe I.D. (inches)
Total Sensor Length
Total Cable Length
Cable Tags
Converter Model Number
Converter Serial Number
Meter Serial Number

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
4
1.4 Tools Required for Installation
IMPORTANT
It is recommended that the Sensor Insertion Tool be used for easier and faster installation. See STEP 10.
IMPORTANT
This instrument shall only be implemented as permanently installed equipment.
i
i
2 - 9/16" or 3/4" reversible ratchet
wrenches. (Size is dependent
on the size of the retaining rods
supplied with the sensor and
determined at the time of order.)
Tools recommended for installation:
1 - pipe wrench
capable of a 4" span
1 - 7/16" wrench
or crescent wrench
1 - Sensor
Insertion Tool
3/8" Part Number 75031 for TSL
< 72" and pressure < 200 psi
1/2" Part Number 75032) for TSL
> 72" or pressure > 200 psi
Tools provided:
Please read the entire manual before installing the FPI Mag sensor. Due to size and pressure requirements
determined at the time of order, certain FPI Mag sensors are equipped with more robust 1/2" threaded rods, a
heavy spring, a larger top plate and a compression assembly designed to accept the larger insertion rods. For
these installations, please replace all references to 3/8" rods and nuts with 1/2". The standard sensor size is 1.25".
In some smaller applications the FPI Mag may use the smaller 0.75" sensor.
2.0 SENSOR PROBE INSTALLATION

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
5
Diagram
Number Description Part Number
1 Top Plate for use with 3/8" retaining rods MIM043
1 Top Plate for use with 1/2" retaining rods MIM053
2 Sensor Assembly Contact
Factory
3 Set screw (2 ea.) 920001001
4 Spring 920000901
4 Heavy Spring 920000903
52" Stainless Steel Full Port Ball Valve with SS Nipple
(Min. 1 7/8" dia. port) 43059-1
6 Compression Seal (3/4" sensor) MIM017-1
6 Compression Seal (1 -1/4" sensor) MIM012-1
7 Compression Seal Assembly Contact
Factory
8 3/8" SS Long Threaded Rods (2 ea.) 64006
9 1/2" High Strength SS Short Threaded Rods (2 ea.) X6743
10 3/8" SS Nut (8 ea.) 93007
10 1/2" SS Nut (8 ea.) 10755
11 3/8" Locking Cotter Pin 921000701
11 1/2" Locking Cotter Pin 921000702
12 Captive Nut 42226
12 Captive Nut Bearing Retainer 42225
12 Captive Nut Bearing 92121
13 Protective Cap FPI-002RP
STEP 1: Sensor Parts List with Part Numbers
This manual refers to the part names of the sensor. It is important to be familiar with the parts and their names
when following the installation instructions.
The table below corresponds to the graphic in Figure 5.

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
6
Figure 5. Parts Diagrams
9
3
4
2
8
7
5
10
6
1
11
12
13
Captive Nut,
Bearing and
Bearing Retainer
Top Plate
Compression Seal
(Inside Assembly)
Insertion
Rods
Compression
Seal Assembly
Locking Cotter Pin
IMPORTANT!
Do not
disassemble the
sensor body.
Removal of the
sensor body
screws will VOID
the warranty.
i

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
7
STEP 2: Detach The Cable Quick Connects
The sensor cable is tted with an IP68 rated Quick Connect tting at the sensor connection. For ease of installation,
remove the cable from the sensor and set aside. Compression gland seals are available as an option instead of the
Quick Connect cable ttings.
IMPORTANT: When the Quick-Connect cable connection is not attached to the sensor, ensure that
the threaded caps are attached to the sensor connection and the cable connection to keep the wire
connectors free of dirt and corrosion. When the cable is connected to the sensor, connect the end caps
together to keep their interior free from dirt and corrosion.
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Quick Connect Cables Fittings With End Caps Optional Compression Gland
Cable Fittings
STEP 3: Verify Sensor Installation Location - Upstream And Downstream Straight-Pipe Run Recommendations
Figure 6. Sensor Cable Fittings
Flow disturbers such as partially open valves cause ow disturbances that can adversely aect ow meter accuracy.
The table below provides suggestions for the placement of the FPI Mag sensor upstream and downstream
of common ow disturbers to meet specication accuracy. The upstream and downstream straight-pipe
recommendations are conservative, based on research completed in the McCrometer NIST traceable calibration
facility. In many cases, the installation distances suggested below can be shortened depending on ow conditions
and piping layout.
Upstream and Downstream Straight Pipe Run Recommendations
Flow
Disturbance Condition Upstream Downstream Notes
Buttery
Valve
100% Open 2D 1D Meter should be installed perpendicular to
the axis of rotation of the valve - See Figure 8
Non-Actuated
Control Valve 5D 1D
For Buttery Valves that remain in a constant
position between 50% to 100% open
during operation. Meter should be installed
perpendicular to the axis of rotation of the
valve - See Figure 8
Actuating Control
Valve
20D; See
Note and
Figure 7
2D Recommended to install the sensor 2D
upstream of the Automated Control Valves

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
8
Flow
Disturbance Condition Upstream Downstream Notes
Gate Valves
100% Open 0D 0D
< 100% Open
20D; See
Note and
Figure 7
2D Recommended to install the sensor 1D
upstream of the Gate Valves
Single 90
Degree
Elbows and
"T" Fittings
Sensor In Plane
with the Elbow -
See Figure 9
2D Max;
See Note 1D
It is recommended that the sensor be
installed as close to the elbow as possible, no
further than 2D downstream. Otherwise the
recommended upstream piping shall be 7D.
Sensor
Perpendicular to
plane of Elbow
7D 2D None
Single 45
Degree
Elbow or
pipe bend
less than 45
degrees
Sensor In Plane
with the Elbow -
See Figure 9
1D 1D None
Sensor
Perpendicular to
plane of Elbow
5D 2D None
Double
Elbows In
Plane
Sensor In Plane
with the Elbows-
See Figure 9
2D Max;
See Note 1D
It is recommended that the sensor be
installed as close to the elbow as possible, no
further than 2D downstream. Otherwise the
recommended upstream piping shall be 7D.
Sensor
Perpendicular to
plane of Elbows
7D 2D None
Double
Elbows Out
of Plane
Sensor In plane
with last elbow 7D 2D None
Reduced and
Increased
Inlets to the
Metering
Section
ID at Metering
Point up to 20%
Greater than ID of
upstream pipe
5D 1D
Concentric reduction recommended.
Example: Meter Section 12" Pipe, upstream
section 10" Pipe
ID at Metering
Point up to 50%
Less than ID of
upstream pipe
0D 0D
Concentric reduction recommended.
Example: Meter Section 10" Pipe, upstream
section 12" Pipe
Open
Discharge
Discharge of
pipe is vented to
atmosphere
Not
Applicable 2D Full Pipe Required
Pump
Discharge
Single Pump 5D 2D Recommend putting sensor on suction side
of pump where possible.
Multiple Pump
on Common
Discharge Line
20D; See
Note 2D Recommend putting sensor on suction side of pump where possible.
Filter
Discharge
Standard Inline
Filter 5D 2D None
Note: The table above is not inclusive of each possible installation scenario for the McCrometer FPI Mag. For installations
not included in the table, the McCrometer Applications Team is available to review cases and make a determination as to the
viability of the installation. Please feel free to contact us with any questions or concerns.

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
9
Figure 9. FPI Installed in Plane with Elbow
Figure 10. Sensor Clearance Distance
Figure 7. FPI Mag Installation Orientation With A Gate Valve Or Elbow
Rotational axis of a buttery valve
Buttery Valve
FLOW
VALVE
20D UPSTREAM
FPI
FLOW
VALVEFPI
1D DOWN-
STREAM
FLOW
VALVE
20D UPSTREAM
FPI
FLOW
VALVEFPI
1D DOWN-
STREAM
FLOW
VALVE
20D UPSTREAM
FPI
FLOW
VALVEFPI
1D DOWN-
STREAM
Install the FPI Mag
perpendicular to the
rotational axis of a
buttery valve
Figure 8. FPI Mag Installation Orientation With
A Buttery Valve
STEP 4: Verify Sucient Installation Clearance From Obstructions
The sensor installation hardware will protrude from the pipe during installation and when installed requiring
sucient clearance (distance H, the required installation clearance, in Figure 10 below) from any obstruction. This
distance accounts for the length of the sensor, the distance from the outer pipe wall to the top of the valve plus:
18" is recommended; 12" is the minimum.
Line Size
(Inches)
Distance
H
4" 51"
6" 51"
8" 55"
10" 55"
12" 59"
14" 59"
16" 59"
18" 63"
20" 63"
22" 67"
Line Size
(Inches)
Distance
H
24" 67"
30" 71.25"
36" 77.25"
42" 83.25"
48" 89.25"
54" 95.25"
60" 101.25"
66" 107.25"
72" 113.25"
78"-138" Call
Factory
H
Line size
Not to scale
Obstruction

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
10
STEP 5: Pipe Valve Installation
The sensor comes standard with a 2" stainless steel ball valve and a 2" x close stainless steel nipple. The 2" x
close stainless steel nipple is to be used if the installation site has a female tting, i.e., a welded coupling. If the
installation site has a male tting, i.e. a 2" nipple, then the supplied 2" x close stainless steel nipple is not required
for the sensor installation.
Use the supplied pipe sealant or Teon thread tape when installing the valve onto the pipe.
NOTE: If using an existing valve or corporation stop insure it has a minimum port inside diameter of 1-7/8" (48mm),
and a 2" (50mm) NPT female pipe thread output for the sensor. Ensure that the existing valve and nipple are of
high quality.
The valve can be installed onto a welded coupling or pipe saddle. See Figure 11. Alternative ball valve or corporation
stop sizes may be used or required. Consult factory for alternative congurations.
Figure 11. Installation Valve Options
WARNING!
Pressurized pipes should only be hot tapped, cut, or drilled by qualied personnel using high quality saddles,
valves and stainless steel nipples. If possible, depressurize the pipe before attempting any installation.
!
IMPORTANT: The
MINIMUM port
inside diameter
for all installation
valves is 1-7/8"
(48mm).
i
Pipe Saddle
With Ball Valve
Welded Pipe
Nipple
With Ball Valve
Corporation
Stop
Female threads
are NPT
Male threads
are AWWA

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
11
STEP 6: Ensure correct sensor orientation
The FPI should be installed perpendicular to the
pipe as shown in Figure 12 for a vertical installation.
The allowable tolerance for installation is ± 0.5°. A
perpendicular installation is determined by the
coupling that is mounted on the pipe. Prior to
installing the FPI a level ruler should be used to
check the coupling and ensure that it sits level.
The FPI will not be perpendicular to the pipe if the
coupling does not sit level. Do not install the sensor
if the coupling is not mounted perpendicular to
the pipe.
The FPI sensor can be installed at any point around
the pipe diameter, providing the sensor maintains
proper orientation as shown in Figure 13.
90° 90°
Figure 13. Sensor installation points
around pipe diameter
Figure 12. Sensor at 90° relative to pipe
Compression Seal
Lower Retaining
Rod Nut Locking
Cotter Pin
Compression Seal
Bolt And Nut
Figure 14. Compression seal removal
STEP 7: Optional Compression Seal Disassembly For
Installation Of Large Sensors
The sensor assembly can be installed onto the pipe valve
as a whole unit. On larger pipe size installations this can be
cumbersome or impractical. In such cases the compression seal
assembly can be removed from the sensor for easier installation
onto the pipe valve. Once the compression seal assembly is
installed onto the pipe valve, then the sensor can be re-installed
into the compression seal assembly.
NOTE: if this step is skipped, proceed to STEP 8.
The following steps describe the separation of the sensor, top-
plate and retaining rods from the compression seal assembly.
1. The compression seal has two bolts and two studs with
nuts. Loosen the bolts and nuts on the compression seal
relieving the pressure on the compression seal. DO NOT
REMOVE THE BOLTS OR NUTS.
2. On the compression seal assembly,
remove the locking cotter pins from the
bottom of the two retaining rods under
the 3/8" or 1/2" nuts.
3. Remove the lower 3/8" or 1/2" nuts from
the retaining rods.
4. Slide the sensor out of the compression
seal. The retaining rods will also slide
out of the compression seal assembly.
Carefully set the sensor and attached
hardware to the side.
5. At this point the compression seal
assembly can be installed onto the valve.
FPI sensor may
be inserted at any
point around the
pipe diameter.

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
12
Figure 15. Sensor Installation
STEP 8: Sensor Installation Onto Pipe Valve
The sensor assembly uses a compression seal, which keeps the sensor watertight when the pipe is under pressure.
Care must be taken when installing the sensor to avoid leaks. Follow the steps below to install the sensor onto
the pipe valve:
1. Put a generous amount of the supplied pipe sealant on the compression seal threads. Teon tape may also
be used.
i
Compression
Seal Threads
Bottom Plate
Compression
Seal Assembly
Pipe Valve
IMPORTANT
If pipe sealant gets on the sensor electrodes the velocity signal may be lost. Use care when applying
the sealant to the compression seal threads.
2. Place the compression seal threads over the pipe valve. Turn the entire sensor assembly clockwise to secure
the assembly to the valve. A large pipe wrench can be used to grip the bottom plate of the compression seal
to tighten the assembly into the pipe valve.
3. The seal is secure when a large amount of force is required to turn the assembly.
4. The sides of the bottom plate should be parallel with the pipe.
5. Locate the ow direction arrow on the top plate and align it with the direction of the ow in the pipe.

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
13
Figure 16. Compression Seal Reassembly
STEP 9: Sensor Re-assembly After Optional Compression Seal Assembly Installation
NOTE: use this step if you removed the compression seal assembly (STEP 7) and installed it onto the pipe valve
separate from the sensor. If you installed the sensor without disassembling it, proceed to the next step.
After the compression seal has been installed onto the pipe valve, follow the steps below to reassemble the sensor
into the compression seal assembly:
1. Apply water or Simple Green to the interior surface of the rubber seal gland. This will act as a lubricant
to facilitate the insertion of the sensor and ensure its proper axial loading.
2. Insert the sensor into the compression seal in the bottom plate while inserting the two retaining rods
into their respective holes in the bottom plate and secure with one 3/8" or 1/2" nut above and one
below the bottom plate.
3. Ensure the two nuts above and below the compression seal assembly are suciently tightened to
prevent the threaded rod from rotating.
4. Insert the locking cotter pins through the small holes in the bottom of the retaining rods, just below
the bottom 3/8" or 1/2" nuts.
IMPORTANT!
When inserting the
retaining rods, ensure
the end has a hole for
the locking cotter pin.
i
Nut Above The
Bottom Plate
Nut Below The
Bottom Plate

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
14
Figure 17. Sensor Vibration
STEP 10: Insert The Sensor
The sensor can be installed while the line is under owing conditions. The
line water velocity should be as low as possible to prevent sensor vibration
during the insertion process. The velocity must be under 5 ft/s.
Follow the steps below to insert the sensor into the pipe.
1. Hand tighten the compression seal bolts and nuts. DO NOT FULLY TIGHTEN THE COMPRESSION SEAL BOLTS
AND NUTS.
2. If the sensor is being installed under owing conditions follow this step. If not, proceed to the next step.
Barely crack open the valve to allow a little water into the compression seal assembly. Some water will leak
from the compressions seal. Lightly tighten compression seal bolts and nuts as required to minimize the
amount of water exiting the compression seal. A towel draped around the compression seal can reduce spray
if necessary.
3. Open the valve completely. Failure to open the valve completely will cause the valve to scrape the sensor
during insertions and may result in permanent damage to the sensor.
WARNING!
The compression seal/sensor assembly may be under pressure. Serious injury may result if proper
procedures are not followed. Do not attempt to install the sensor without the retaining rods fully assembled.
!
WARNING!
If the meter was disassembled to assist in the installation of the compression seal assembly onto the valve
(STEP 7 and STEP 9) it is important to ensure that the meter is properly reassembled with both retaining
rods completely installed with the 3/8" or 1/2" nuts properly tightened.
!

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
15
Figure 18. Captive Nuts
IMPORTANT
If the captive nuts are not tightened simultaneously, the top plate will become crooked and cause the
sensor to be inserted at an angle and may cause permanent damage to the sensor.
i
NOTE
If the short retaining rods are not used (see STEP 13), run a 3/8" or 1/2" nut down against each captive nut
to prevent the captive nut from rotating.
i
Rotate captive nuts clockwise
simultaneously to insert sensor
Set Screw For Load Spring
Captive Nuts
IMPORTANT
It is recommended that the Sensor Insertion Tool be used to rotate the captive nuts to ensure the top plate
compresses evenly. See STEP 11.
i
4. Insert the sensor into the pipe by simultaneously rotating the two captive nuts on the top plate clockwise (See
Figure 18) with the provided 9/16" ratchet wrenches or the Sensor Insertion Tool (See STEP 11) until the foot
of the sensor reaches the far wall of the pipe and the load spring starts to compress. Compression of the load
spring is indicated by the movement of the set screw on the top plate. See STEP 12.
Figure 19. Insertion Tool
STEP 11: Using The Sensor Insertion Tool - Optional
McCrometer recommends using a Sensor Insertion Tool (see Figure
19) to help with inserting the sensor and to avoid any damage to
the sensor.
Follow the steps below to use the Sensor Insertion Tool:
1. Place the Sensor Insertion Tool over the retaining rods and
slide the retaining rods through the holes in the tool until it
sits over the captive nuts.
2. Lock it into place with spring locks located on the bottom of
the tool.
3. Using the provided wrench rotate the high gear shaft clockwise
until the bottom of the sensor reaches the far wall of the pipe
as indicated in STEP 10. The low gear shaft is used to apply
pressure to the sensor once the sensor has reached the far wall
of the pipe. See STEP 12.
3/8" Insertion Tool (Part Number 75031)
for TSL < 72" and pressure < 200 psi
1/2" Insertion Tool (Part Number 75032)
for TSL > 72" or pressure > 200 psi
IMPORTANT
Large line size meters or applications with high pressure may use 1/2" retaining rods. When ordering the
Sensor Insertion Tool specify the size required. (P/N 75031 for 3/8" or P/N 75032 for 1/2")
i

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
16
Figure 20. Sensor Load Indicators Figure 21. Compression Seal Bolts
i
IMPORTANT
Do not overtighten the compression seal as it may cause damage to the seal itself.
i
Compression
Seal
Compression
Seal Bolt
And Nut
STEP 12: Applying A Compression Load To The Sensor
A compression load is required to be applied at the top of the sensor forcing the bottom of the sensor to seat rmly
against the far wall of the pipe. The amount of load is indicated by the three lines etched into the top plate and the
location of the set screw relative to the lines. See Figure 20 and the table below.
Set Screw Location Compression Load Recommended Use
At the lowest line 300 lbs. Low pressure plastic pipes
Between the lowest line
and the middle line 450 lbs. Low pressure metal pipes
Between the top line
and the middle line Consult Factory Applications other than low pressure. Consult factory before applying a compression load greater than 450 lbs.
For applications other than low pressure the sensor load should be increased. Consult factory for the appropriate
loading for your application before applying a compression load greater than 450 lbs.
Follow the steps below to apply a compression load to the sensor:
1. Rotate the two captive nuts on the top plate simultaneously and evenly until the proper load is indicated by
the set screw's relationship to the lines etched on the top plate. See Figure 20.
IMPORTANT
If using the Insertion Tool, rotate the two captive nuts using only the low gear shaft until the proper load
is indicated. DO NOT use the high gears on the insertion tool as this may create too much load too fast
and damage the sensor or the pipe.
2. Tighten the compression seal bolts and nuts just enough to stop any leaking from the seal. See Figure 21.
300 lbs.
450 lbs.
Other
than low
pressure
Low pressure metal pipes
Low pressure plastic pipes

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
17
STEP 13: Installing The Short Retaining Rods
After the sensor has been inserted and the load adjusted, shorter retaining rods can be installed and the longer
ones removed. This will make the sensor assembly more compact.
Figure 22. Installed Short Retaining Rods
Follow the steps below to install the short retaining rods:
1. Insert the two short retaining rods through the two holes in
the top plate opposite the two captive nuts with the long
retaining rods. Once the short retaining rods are passed
through the top plate, thread one nut per rod onto the
bottom of the rod about one inch from the bottom.
2. Insert the two short rods end through the corresponding
holes on the compression seal bottom plate. Thread a nut
onto the bottom of each short retaining rod.
3. Tighten the nuts above and below the compression seal
bottom plate to secure the short retaining rods to the bottom
plate and to prevent the short retaining rods from spinning.
4. Attach a locking cotter pins to bottom ends of the short
retaining rods.
5. Secure the short retaining rods to the top plate with one 3/8"
or 1/2" nuts per rod.
6. Remove the long retaining rods and store in a safe, dry
location tagged with the meter serial number.
7. Check and adjust the "Sensor Load" as necessary. See STEP
12.
8. Secure the 3/8” or 1/2" nuts on the top plate by running a
second jam nut down and tightening it against the rst nut.
9. Attach a locking cotter pin to the top ends of the short
retaining rods.
10. Place the protective caps on the ends of the two retaining
rods over the cotter pins.
IMPORTANT
The long retaining rods are matched to each sensor
and are required for removal of the sensor. It is
important to safely store the long retaining rods and
label them with the meter serial number.
i!
WARNING!
Do not remove the long installation rods
until the short retaining rods are secured
with cotter pins.
Locking
Cotter Pin
Locking
Cotter Pin
Nuts
Short
Retaining
Rods
Captive
Nut
Protective
Caps

SENSOR PROBE INSTALLATION
Copyright © 2017 McCrometer, Inc. All printed material should not be changed or altered without permission of
McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
www.mccrometer.com
3255 WEST STETSON AVENUE • HEMET, CALIFORNIA 92545 USA Printed In the U.S.A.
TEL: [phone] • 800-220-2279 • FAX: [phone] Lit. # 30120-48 Rev. 2.4 / 11-5-18
18
Attach
ground wire
with screw
STEP 14: Attaching the Ground Wire
The FPI meter is electrically continuous to a conductive (non
PVC) pipe through the retaining rods. Additional grounding
may be required to a dedicated earth ground via ring terminal
and 10 AWG wire (not provided).
VFD’s and chemical injection mechanisms may have adverse
eects on the electromagnetic signal. Contact the factory for
further information on grounding eects.
Figure 23. Attaching the Ground Wire
Connects
to earth
ground