McCrometer FPI Mag 394 User manual

30120-48 Rev. 2.6
August 30, 2019
COMPONENT
NSF/ANSI/CAN 61
&
NSF/ANSI 372
®
I
AP
M
O
R
&T
Full Prole Insertion
Electromagnetic Flow Meter
Models 394 and 395
Installation, Operation and
Maintenance Manual
Standard Model
For use in non-hazardous locations
HL Model
For use in hazardous locations:
• Class I, Division 2, Groups A-D, T5
• Class I, Zone 2 IIC T5

30120-48 Rev. 2.6 | 30AUG2019
Page ii
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: Names of sensor components ..................................................5
STEP 2: Detach the cable quick connects ................................................6
STEP 3: Verify sensor installation location - upstream and downstream straight-pipe run
recommendations................................................................6
STEP 4: Verify sucient installation clearance from obstructions .........................8
STEP 5: Installing the pipe valve........................................................9
STEP 6: Ensure sensor will be installed perpendicular to the pipe ........................10
STEP 7: OPTIONAL STEP: Disassemble the compression seal - For installation of large
sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
STEP 8: Connecting the sensor onto pipe valve .........................................11
STEP 9: OPTIONAL STEP: Reassemble the sensor compression seal ......................11
STEP 10: Insert the sensor probe into the pipe .........................................12
STEP 11: Apply a compression load to the sensor .......................................14
STEP 12: Install the retaining rods .....................................................15
STEP 13: Attaching the ground wire ...................................................16
3.0 SENSOR REMOVAL...................................................................16
4.0 ELECTRONICS INSTALLATION ........................................................17
5.0 MAINTENANCE ......................................................................17
6.0 SPECIFICATIONS.....................................................................18
7.0 REPLACEMENT PARTS................................................................20
8.0 RETURNING A UNIT FOR REPAIR ......................................................21
WARRANTY STATEMENT ...................................................................22

30120-48 Rev. 2.6 | 30AUG2019
Page 1
Safety
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.
!

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Page 2
Unpacking and Verifying Components
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 394 is a forward and reverse ow measurement sensor, and the 395 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 Figura 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
14 1 Stainless Steel ball valve & SS nipple
15 1 Calibration Certicate
Figura 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 12.
i

30120-48 Rev. 2.6 | 30AUG2019
Page 3
Unpacking and Verifying Components
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 Figura 2.
Figura 2. Meter Serial Number Tag
Figura 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 Figura 1.
1.3 Verify Information On Cable Tags
The converter cable has two tags located near where the cable enters
the converter as shown in Figura 3. Verify the following information is
consistent with the specications provided at the time of order:
Figura 4. Cables with Cable Tags
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

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Page 4
Sensor Probe Installation
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:
Read the entire manual before installing the FPI Mag sensor.
2.0 SENSOR PROBE INSTALLATION
STEP 1: Names of sensor components
STEP 2: Detach the cable quick connects
STEP 3: Verify sensor installation location - upstream and
downstream straight-pipe run recommendations
STEP 4: Verify sucient installation clearance from
obstructions
STEP 5: Installing the pipe valve
STEP 6: Ensure sensor will be installed perpendicular to the
pipe
STEP 7: OPTIONAL STEP: Disassemble the compression seal
- For installation of large sensors
STEP 8: Connecting the sensor onto pipe valve
STEP9: OPTIONAL STEP: Reassemblethe sensor compression
seal
STEP 10: Insert the sensor probe into the pipe
STEP 11: Apply a compression load to the sensor
STEP 12: Install the retaining rods
STEP 13: Attaching the ground wire
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, 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.

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Page 5
Sensor Probe Installation
STEP 1: Names of sensor components
This manual refers to the part names of the sensor. It is important to be familiar with the parts and their names as shown
below in Figura 5 when following the installation instructions. For a full list of replaceable parts with part numbers, see
Section 7.0.
Figura 5. Sensor Parts
Captive nut, bearing
and bearing retainer
Top plate
Set screw
Sensor assembly
Insertion rods
Retaining rods
Compression
seal assembly
Locking cotter pin
Protective caps
2” stainless steel
full port ball valve
IMPORTANT!
Do not disassemble the
sensor body. Removal of
the sensor body screws
will VOID the warranty.
i
Top view of
top plate

30120-48 Rev. 2.6 | 30AUG2019
Page 6
Sensor Probe Installation
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. (Figura 6)
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.
i
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
Figura 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 Figura 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 Figura 8
Actuating Control
Valve
20D; See
Note and
Figura 7
2D Recommended to install the sensor 2D upstream of
the Automated Control Valves

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Page 7
Sensor Probe Installation
Flow
Disturbance Condition Upstream Downstream Notes
Gate Valves
100% Open 0D 0D
< 100% Open
20D; See
Note and
Figura 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 Figura 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 Figura 9
1D 1D None
Sensor
Perpendicular to
plane of Elbow
5D 2D None
Double
Elbows In
Plane
Sensor In Plane
with the Elbows-
See Figura 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.

30120-48 Rev. 2.6 | 30AUG2019
Page 8
Sensor Probe Installation
Figura 10. Sensor Clearance Distance
Figura 9. FPI Installed in Place with Elbow
Figura 7. FPI Mag Installation Orientation With A Gate Valve Or Elbow
Rotational axis of a buttery valve
90° 90°
90° 90°
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
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 Figura 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
Figura 8. FPI Mag Installation Orientation
With A Buttery Valve

30120-48 Rev. 2.6 | 30AUG2019
Page 9
Sensor Probe Installation
STEP 5: Installing the pipe valve
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 Figura 11. Alternative ball valve or corporation stop
sizes may be used or required. Consult factory for alternative congurations.
Figura 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

30120-48 Rev. 2.6 | 30AUG2019
Page 10
Sensor Probe Installation
STEP 6: Ensure sensor will be installed perpendicular to the pipe
The FPI should be installed perpendicular to the pipe as shown in Figura 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 Figura 13.
90° 90°
90° 90°
Figura 12. Sensor at 90° relative to pipe
FPI sensor may
be inserted at any
point around the
pipe diameter.
STEP 7: OPTIONAL STEP: Disassemble the compression
seal - 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.
(See Figura 13)
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.
Figura 13. Sensor installation points
around pipe diameter
Figura 14. Compression seal removal
Compression Seal
Lower
Retaining
Rod Nut
Locking
Cotter Pin
Compression Seal
Bolt And Nut

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Page 11
Sensor Probe Installation
Figura 16. Compression seal reassembly
STEP 8: Connecting the sensor 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 pipe sealant or Teon tape on the compression seal threads.
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. (See
Figura 15) 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.
i
STEP 9: OPTIONAL STEP: Reassemble the sensor
compression seal
NOTE: Do 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.
(Figura 16)
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.
Figura 15. Connecting sensor to the pipe
valve
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

30120-48 Rev. 2.6 | 30AUG2019
Page 12
Sensor Probe Installation
Figura 17. Sensor Vibration
STEP 10: Insert the sensor probe into the pipe
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. (See Figura 17.) The velocity must be under 5 ft/s.
IMPORTANT! READ THIS BEFORE YOU INSERT THE PROBE!
NOTE 1: Take precautions if the pipe is under pressure
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.
NOTE 2: Ensure the sensor probe tip is seated in the pipe
The sensor probe must be completely inserted in the pipe so that the tip of
the probe is seated ush against the opposite side of the pipe. The probe tip
is designed with a small at projection that will minimize contact with the
pipe while ensuring the sensor probe remains in place as securely as possible.
(Figura 18)
NOTE 3: Using the sensor insertion tool
McCrometer recommends using
a sensor insertion tool (see Figura
19) to rotate the captive nuts.
This will ensure the top plate
compresses evenly and will help
avoid any damage to the sensor.
NOTE 4: Orient the sensor with the ow direction
Before inserting the sensor probe, ensure the sensor is oriented with the ow
direction (Figura 20). The label on the top plate shows the orientation of the
meter when it is properly inserted.
Figura 19. Insertion Tool
Figura 18. Sensor probe tip
seated in pipe
!
!
Flow
direction
Figura 20. Meter oriented with
ow direction
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Sensor Probe Installation
Figura 22. Captive Nuts
i
Rotate captive nuts clockwise
simultaneously to insert sensor
Set screw
for load
spring
Captive nuts
Follow the steps below to insert the sensor probe into the pipe.
1. If you disassembled and reassembled the compression seal, hand tighten the compression seal bolts and nuts. DO
NOT FULLY TIGHTEN THE COMPRESSION SEAL BOLTS AND NUTS. If you did not disassemble the compression seal,
proceed to step 2.
2. If the sensor is being installed under owing conditions follow this step. If it is not, proceed to step 3.
Slightly open the valve to allow a little water into the compression seal assembly. Some water will leak from the
compression seal. Lightly tighten the 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.
4. 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.
5. Lock it into place with spring locks located on the
bottom of the tool.
6. Using the provided wrench rotate the high gear shaft
clockwise. (Figura 21)
7. Continue to insert the sensor until the sensor probe
tip reaches the far wall of the pipe and the load spring
starts to compress.
8. Use the low gear shaft to apply pressure to the sensor
when the sensor touches the other side of the pipe.
Compression of the load spring is indicated by the
movement of the set screw on the top plate (see STEP
11).
4. Rotate the two captive nuts (Figura 22) on the top plate
clockwise simultaneously with the provided 9/16"
ratchet wrenches. This will insert to sensor probe into
the pipe.
5. Continue inserting the sensor until the sensor probe
tip 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 11).
If you are NOT using the sensor insertion tool:
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.
Figura 21. Inserting the sensor
with the insertion tool
If you are using the sensor insertion tool:

30120-48 Rev. 2.6 | 30AUG2019
Page 14
Sensor Probe Installation
Figura 24. 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 11: Apply 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 Figura 23 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 Figura 23.
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 Figura 24.
300 lbs.
450 lbs.
Other
than low
pressure
Low pressure metal pipes
Low pressure plastic pipes
Figura 23. Sensor Load Indicators

30120-48 Rev. 2.6 | 30AUG2019
Page 15
Sensor Probe Installation
STEP 12: Install the retaining rods
After the sensor has been inserted and the load adjusted, remove the insertion rods and install the shorter retaining rods.
This will make the sensor assembly more compact. (Figura 25)
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
11.
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 insertion rods are matched to each sensor and
are required to remove the sensor. It is important to
safely store the insertion rods and label them with
the meter serial number.
i!WARNING!
Do not remove the installation rods until the
short retaining rods are secured with cotter pins.
Locking
Cotter Pin
Locking
Cotter Pin
Nuts
Retaining
Rods
Captive
Nut
Protective
Caps
Figura 25. Installed Short Retaining Rods
NOTE
If the short retaining rods are not used, run a 3/8" or 1/2" nut down against each captive nut to prevent the captive
nut from rotating.
i

30120-48 Rev. 2.6 | 30AUG2019
Page 16
Sensor Removal
Attach
ground wire
with screw
STEP 13: 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). (Figura 26)
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.
Figura 27. Cross-Section Of Meter Showing Sensor
Removal
Connects
to earth
ground
Follow the steps below to safely remove the sensor:
1. Visually inspect the pipe and entire assembly for
damage or corrosion paying close attention to any
nipples and welded couplings. If there is any doubt as
to the condition of any element of the pipe or meter,
depressurize the line before attempting to remove the
meter.
2. Reduce line velocity to 5 ft/s or less to prevent sensor
vibration, or depressurize the line.
3. Thread a long retaining rod through the captive nut until
the rod nears the compression assembly. Ensure that the
bottom of the rod has the hole for the locking cotter pin.
4. Thread a 3/8" nut onto the bottom of the long retaining
rod about an inch up from the bottom of the rod.
5. Continue rotating the long retaining rod until the bottom
of the rod passes through the holes on the bottom plate.
6. Thread another 3/8" or 1/2" nut onto the bottom of the
long retaining rod until it is ush with the bottom plate.
Tighten the nuts above and below the bottom plate
securely locking the long retaining rod in place. Attach the locking cotter pin into the hole through the bottom
of the long retaining rod.
7. Repeat the process for the second long retaining rod.
3.0 SENSOR REMOVAL
WARNING!
The pipe may be under pressure. Serious injury or death may result if proper procedures are not followed. Do not
attempt to remove the short retaining rods without the long retaining rods properly installed. Do not attempt to
remove the sensor with only the short retaining rods.
!
IMPORTANT
Use the long retaining rods provided with the meter for removal. If the rods used for removal are shorter than
those provided by the factory, the sensor cannot be removed without depressurizing the line.
i
Figura 26. Attaching the Ground Wire
Compression
Seal
Sensor
Bottom Of
Sensor
Valve Closure
Mechanism
Space Between
Bottom Of
Seal And Valve
Mechanism
Pipe Valve
Retaining
Rods

30120-48 Rev. 2.6 | 30AUG2019
Page 17
Electronics Installation
8. Once both of the long retaining rods are securely in place, completely remove the short retaining rods.
9. Loosen the compression seal bolts until the seal just begins to leak. This will relieve the pressure on the compression
seal allowing the sensor to be removed. Draping a towel around the compression seal can reduce any spraying water.
NOTE: The compression seal may prevent immediate leakage on sensors installed for a long period of time until the
sensor begins to rise.
10. Rotate the captive nuts on the top plate simultaneously. The sensor insertion tool is recommended. See Installation,
STEP 10. This will cause the sensor to rise out of the pipe. If the line is under pressure do not remove the sensor from
the compression seal completely. Only raise the sensor until it is clear of the valve, but still below the compression
seal. See Figura 27. Once the sensor has cleared the valve mechanism, the valve can then be closed. Do not attempt to
force the valve closed while the sensor is still passing through the valve as permanent damage to the sensor can occur.
11. Once the valve is closed, the entire sensor can be removed from the valve.
4.0 ELECTRONICS INSTALLATION
See the Installation, Operation and Maintenance Manual for the converter supplied with your system.
5.0 MAINTENANCE
The FPI Mag is essentially a maintenance free meter with no user serviceable parts. However, the metered uid may contain
solids or other contaminants which may coat the sensor electrodes. A periodic inspection may be recommended to ensure
the sensor electrodes are clean. To clean the unit, remove the sensor following all of the instructions and safety warnings
contained in Section 3.0. When the sensor is removed from the pipe, carefully wipe down the sensor with a soft cloth and
rubbing alcohol.

30120-48 Rev. 2.6 | 30AUG2019
Page 18
Specications
6.0 SPECIFICATIONS
Specication Sheet
FPI Mag Flow Meter with ProComm Converter
30121-75 Rev. 1.9 | 30AUG2019
Page 4
FLOW METER SPECIFICATIONS
The full pipe averaging ow meter comes complete with Mounting Hardware, AC Converter with Dual 4-20mA output, 25
Feet of Dual Submersible Cables with quick connects at sensor, Stainless Steel Body, 316 Stainless Steel Electrodes, NSF
Approved Fusion Bonded Epoxy Coating, 2”Stainless Steel Ball Valve (minimum of 1-7/8”port I.D.), 2”x Close Stainless Steel
Nipple, 2-Year Warranty.
Measurement
Volumetric ow in lled ow conduits 4”(100 mm) to 138” (3,500 mm) utilizing insertable
electromagnetic averaging sensor. Flow indication in English Standard or Metric units.
Flow Measurement
Method Electromagnetic
Calibrated accuracy
for forward and
bidirectional sensors
• ±0.5% from 1 f/s to max velocity (on next page), up to ±1% for 0.3 to 1 f/s
• ±1% for reverse ow
Linearity 0.3% of Range
Repeatability 0.2% of Reading
Direction
measurement
• 395 sensor - Forward ow measurement and reverse ow indication
• 394 sensor - bidirectional ow measurement
Materials
Coating Fusion bonded epoxy (NSF 61 approved) coated 316 stainless steel
Insertion hardware 316 Stainless Steel
Compression seal Silicone Rubber
Sensor electrodes 316 Stainless Steel
Temperature Range
Operation -10 to 60°C (14 to 140°F) up to 250 PSI
Storage -15 to 60°C (5 to 140° F)
Note regarding storage: During freezing conditions and when meter is not in use, sensor
must be removed from pipe and stored in dry conditions.
NOTE: Damage to the sensor caused by allowing the sensor freeze in the pipe is not
covered by the warranty.
Electrical Connections
• Quick Connect
• Compression gland seals
IP Rating
Standard model • Quick Connect (IP68)
• Compression gland seals (IP68)
HL model • Quick Connect (IP67)
• Compression gland seals (IP67)
Sensor Submersibility Depth
With standard quick
connect 1.8 m (6 ft.)
With optional strain
relief cable 9 m (30 ft.)