Fox Thermal Instruments FT1 User manual

106012
Rev. G
Model FT1
Fox Thermal Instruments, Inc.
www.foxthermalinstruments.com | 399 Reservation Road Marina, CA. 93933
THERMAL MASS FLOW METER & TEMPERATURE TRANSMITTER

FOX IS ISO 9001 CERTIFIED
Fox FT1 Manuals:
• Fox FT1 View™ Manual
All Fox Manuals and software available in English only.
2
Model FT1
DISCLAIMER
Notice
This publication must be read in its entirety before performing any operation. Failure
to understand and follow these instructions could result in serious personal injury
and/or damage to the equipment. Should this equipment require repair or adjustment
beyond the procedures given herein, contact the factory at:
FOX THERMAL INSTRUMENTS, INC.
399 RESERVATION ROAD
MARINA, CA 93933
TELEPHONE: [phone]
FAX: [phone]
EMAIL: [email protected]
Download Technical Data Sheets from our website:
www.foxthermalinstruments.com
Fox Thermal Instruments believes that the information provided herein is accurate;
however, be advised that the information contained herein is NOT a guarantee
for satisfactory results. Specifically, this information is neither a warranty nor
guarantee, expressed or implied, regarding performance, merchantability, fitness,
or any other matter with respect to the products; nor recommendation for the use
of the product/process information in conflict with any patent. Please note that Fox
Thermal Instruments, Inc. reserves the right to change and/or improve the product
design and specification without notice.

3
Model FT1
TABLE OF CONTENTS
Table Of Contents
1. Introduction Page 4
a. Menu Trees Page 4
b. Quick Start Guide Page 12
2. Installation (Mechanical) Page 16
a. Installation Depth Page 18
b. Orientation of Flowmeter Page 19
c. Rotating the Probe/Enclosure Page 19
d. Changing the Orientation of the Display Page 27
e. Mounting Instructions Page 21
3. Wiring (Electrical) Page 26
a. General Wiring Page 28
b. Input Power Page 28
c. Signal Wiring Page 29
d. Pulse/Alarm Wiring (optional feature) Page 31
e. RS485 Wiring: Modbus RTU or BACnet MS/TP (optional feature) Page 33
f. HART wiring Page 34
4. Operation (Standard Operation) Page 36
a. Start Up Page 36
b. Programming Page 38
c. Zero CAL-CHECK®Page 54
d. Gas-SelectX®Page 58
5. Communication Protocols Page 63
a. RS485 Modbus RTU Page 63
b. BACnet MS/TP Page 71
c. HART Page 75
6. Maintenance Page 80
a. Precautions Page 80
b. General Page 81
c. Troubleshooting Page 86
7. Appendices Page 91
a. Specifications Page 91
b. Agency Approvals Page 93
c. Dimensions Page 94
d. Warranty Page 95
e. Returning your meter Page 97
8. Glossary of Terms and Abbreviations Page 98
9. Index Page 99

MAINMENU
I/OFLODSPEXIT
SETI/O
COM420EXIT
Comm=Modbus
NXTOK
None
Modbus
BACnet
mA=Flow
NXTOK
20mACnt=3265
CHGOK
4mACnt=367
CHGOK
20mA=2345.6SCFM
CHGOK
4mA=0SCFM
CHGOK
Temp
Flow AnalogOutputs
Baud=9600
NXTOK
Parity=NONE
NXTOK
Address=02
CHGOK
Modbus
only
1200
2400
4800
9600
19200
38400
57600
76800
115200
NONE
ODD
EVEN
01‐247
Entermenubyscollingtodisplay4
andenteringthepassword
mAFault=Notused
NXTOK
Notused
3.6mA
21mA
Baud=9600
NXTOK
9600
19200
38400
57600
76800
115200 MAC_add=3
CHGOK
Max_master=127
CHGOK
ID=12345
CHGOK
Name=SITE1
CHGOK
BACnet
only
SETI/O
PUL420EXIT
IfRS485hardwaredetected
Communication
OR
Level2
only
OR SETI/O
COMPUL420EXIT
Comm=HART
OK
Address=0
CHGOK
Ifpulse/alarmhardwaredetectedIfHARThardwaredetected/withlicense
0‐63
(p. 38)
(p. 39)
Display Menu, p. 8
Flow Menu 1, p. 6
Digital Output Menu, p. 5
4
Model FT1
DISCLAIMER
4
INTRODUCTION
Fig. 1.1: FT1 Menu Tree - Main Menu
Main Menu
Introduction: Menu Trees
Digital Output

OUT=Pulse
NXTOK
Notused
Pulse
HiFloAlm
LoFloAlm
HiTempAlm
LoTempAlm
PulseOutput
P/UU/PFEQEXIT
PLS/UNT=2
CHGOK
UNT/PLS=0.5
CHGOK
MaxFreq=100Hz
CHGOK
MaxFlo=5000SCFM
CHGOK
HiFloAlm=500SCFM
CHGOK
LoFloAlm=100SCFM
CHGOK
HiTmpAlm=250°F
CHGOK
LoTmpAlm=10F
CHGOK
HighFlowAlarm
LowFlowAlarm
HighTempAlarm
LowTempAlarm
Select1of3
methodstoscale
thepulseoutput
Pulse
OUT=HiFloAlm
NXTOK
OUT=LoFloAlm
NXTOK
OUT=HiTmpAlm
NXTOK
OUT=LoTmpAlm
NXTOK
SetI/O
PUL420EXIT
Alarmoutput
MAINMENU
I/OFLODSPEXIT
(p. 40)
(p. 42)
(See Flow Menu 2, p. 7, for more alarm settings)
(p. 41)
5
Model FT1
INTRODUCTION
Fig. 1.2: FT1 Menu Tree - Digital Output
Introduction: Menu Trees
Digital Output

FLOWMENU1
DGNUNTFM2EXIT
DIAGNOSTIC
SIMZROEXIT
FloSim=0SCFM
CHGOK
TmpSim=0°F
CHGOK
ENABLESIM?
YESNO
FLOUNT=SCFM
NXTOK
SCFM
SCFH
NM3/H
NM3/M
KG/H
KG/M
KG/S
LBS/H
LBS/M
LBS/S
NLPH
NLPM
MMSCFD
LBS/D
SLPM
NLPS
MSCFD
SM3/H
MT/H
NM3/D
MMSCFM
MCFD
SCFD
SM3/M
SM3/D
TMPUNT=°F
NXTOK
DegF
DegC
TmpRef=60°F
CHGOK
PRESUNT=Psia
NXTOK
PresRef=14.73
CHGOK
mmHG
Psia
bara
STP
SimulateFlow?
YESNO
SimulateTemp?
YESNO
DNS=1.2323kg/m3
OK
MAINMENU
I/OFLODSPEXIT
(p. 52) (p. 46)
Flow Menu 2 Menu, p. 7
Zero CAL-CHECK
®
Menu, p. 9
6
Model FT1
DISCLAIMER
6
INTRODUCTION
Fig. 1.3: FT1 Menu Tree - Flow Menu 1
Flow Menu 1
Introduction: Menu Trees
Flow Menu 2

FLOWMENU2
GASSPCPRMEXIT
Kfact=0%
CHGOK
RESETCRC?
YESNO
Cutoff=12.5SCFM
CHGOK
Pipe_id=4.026In
CHGOK
Filter=0.8Sec
CHGOK
Parameters
Flowcutoffinselectedunits
Pipeidininchesormm
FlowFilterinseconds
Min=0.8,max=10
HiFloAlm=0SCFM
CHGOK
LoFloAlm=0SCFM
CHGOK
HiTmpAlm=0SCFM
CHGOK
LoTmpAlm=0SCFM
CHGOK
Thesealarmscanbeusedwithoutthedigitaloutputassignedtothe
alarm.
Ifthatisthecase,thealarmstatuswillonlybeshownonthedisplay,
throughserialcommunicationorFT1View.
Ifthedigitaloutputisassignedtoanalarm,changingthevalueherewill
changethatsetting.
Level2
RESTOREDATABASE?
YESNO
SETNRT?
YESNO
AREYOUSURE?
YESNO
TOTRSTDISABLED
OK
Thismessagewillshowfor3seconds
beforereturningtotheFlow
Parameter2Menu.
WARNING:Oncethenon‐resettable
totalizerisactivated,itcannotbe
undone.
MAINMENU
I/OFLODSPEXIT
FLOWMENU1
DGNUNTFM2EXIT
(p. 50)
(p. 48)
(p. 49)
Gas-SelectX
®
Menu, p. 10
7
Model FT1
INTRODUCTION
Fig. 1.4: FT1 Menu Tree - Flow Menu 2
Introduction: Menu Trees
Flow Menu 2

DISPLAY/PASSWORD
DSPPSWEXIT
DSP1L1=FLorate
NXTOK
FLorate
Total
Elps
Temp
Alarm
DSP1L2=Total
NXTOK
DSP2L1=temp
NXTOK
DSP2L2=Elps
NXTOK
ALTERNATE=Off
NXTOK
On
Off
PASSWD=1234
CHGOK
FLorate
Total
Elps
Temp
Alarm
FLorate
Total
Elps
Temp
Alarm
FLorate
Total
Elps
Temp
Alarm
Whenalternate
"ON",flashes
betweenthe2
displays
Display1
Line1
Display2
Line1
Display2
Line2
MAINMENU
I/OFLODSPEXIT
Display1
Line2
(p. 45)(p. 43)
8
Model FT1
DISCLAIMER
8
INTRODUCTION
Fig. 1.5: FT1 Menu Tree - Display Menu
Note: All readings updated every second
• Flo Rate = Flow rate of process gas
• Total = Total flow of process gas
• Elps = Elapsed time since reset of flow total
• Temp = Temperature of process gas
• Alarm = Notification of errors; diagnostic errors
Introduction: Menu Trees
Display Menu

DIAGNOSTICMENU
SIMZR0EXIT
ZEROCHKMENU
VEREXIT
ProcessZeroand
Stable?YESEXIT
VerifyingZERO
0.512T=123
ZERO=0.259
PassOK
Displaysthetest’s
countdowntimer
Displaysanumbervalue
duringtest
VERIFYZERO?
YESNO
ZERO=0.911
WarningOK
ZERO=2.321
FailOK
FLOWMENU1
DGNUNTFM2EXIT
MAINMENU
I/OFLODSPEXIT
ZeroCAL‐CHECKFail
Greaterthan±1.0
ZeroCAL‐CHECKPass
Lessthan±0.80
ZeroCAL‐CHECKWarning
Between±0.80to±1.0
(p. 56)
9
Model FT1
INTRODUCTION
Fig. 1.6: FT1 Menu Tree - Zero CAL-CHECK
®
Menu
Introduction: Menu Trees
Zero CAL-CHECK®
Menu

FLOWMENU2
GASSPCPRMEXIT
Propane=0%
UPDNOK
GAS=%Mix
NXTOK
Methane
CO2
Nitrogen
Air
NaturalGas
Argon
Propane
Helium
Oxygen
Butane
Hydrogen
GasMix
Oxygen=0%
UPDNOK
GasMix(100%)
OK
CO2=30%
UPDNOK
Showsonlyifgasmix
doesnotequal100%.
PressingOKreturnsto
gasentry.
Air=0%
UPDNOK
Argon=0%
UPDNOK
MAINMENU
I/OFLODSPEXIT
FLOWMENU1
DGNUNTFM2EXIT
Err:Mix=(110%)
OK
Err:Max3gas
OK
Methane=65%
UPDNOK
Hydrogen=0%
UPDNOK
Butane=0%
UPDNOK
Nitrogen=5%
UPDNOK
Showsonlyifnoerroris
detected.PressingOK
allowsexittomenu.
Showsonlyiftoomany
gasesareselected.
Onlythree(3)gases
areallowed.Pressing
OKreturnstogas
entry.
SelectuptothreegasesforGasMix.Besure
mixtureequals100%.
OR OR
Helium=0%
UPDNOK
(p. 58)
10
Model FT1
DISCLAIMER
10
INTRODUCTION
Introduction: Menu Trees
Fig. 1.7: FT1 Menu Tree - Gas-SelectX
®
Menu
Gas-SelectX®Menu
The most recent list of available gases can be found on the Fox website:
www.foxthermalinstruments.com

3124.6SCFM
CSV=0.3432Volt
Enter:PressF1&F2atthesametime
PressF4toreturntonormalmode
Display10
Display11
Display12
Display13
Pulse=1234.5cnt
mA_420=234cnt
Display14
Elp=12.5HR
Stat(hex)=2800
Display15
Alm=None
FT1V2.0
Display16
Display17
MB_Sn=P23949
BB_Sn=P23945
Display18
MTR_Sn=123456
SNS_Sn=234567
Display19
TmpHi=0.0C
TmpLo=0.0C
F2KeyF1Key
F3&F4pressedatthesametimewill
initiatea"Total"reset
Pwr_Cycl=24
Err_tot=0
FloHi=0.00SCFM
FloLo=0.00SCFM
ZRO=0.1
Flowratemeasuredbythemeter
CurrentSenseVoltageofsensormeasurementcircuit
DigitalcontrolcountsofPulseoutput
Digitalcontrolcountof4‐20mAoutput
Elapsedtimeofmeteroperation
Meterfunctionandoperationstatuscode
Meter’sactivealarms
Firmwareversionofmeter
Mainboardserialnumber
Bridgeboardserialnumber
Meterserialnumber
Sensorserialnumber
Alarmsetting
Alarmsetting
Alarmsetting
Alarmsetting
Totalnumberofpowercycles
Numberoferrorsintotalflowmeasurement
ZeroCAL‐CHECKmeasurementvalue

11
Model FT1
INTRODUCTION
Introduction: Menu Trees
Engineering Display
Fig. 1.8: FT1 Menu Tree - Engineering Display

1. Record inside diameter (ID). Ensure the actual
pipe ID matches the pipe ID shown on the
factory calibration certificate. If IDs do not
match, refer to p. 49.
2. Record upstream and downstream straight-pipe
requirements based on Pipe ID.
[refer to p. 17 for more information]
3. a. The Flow Direction Indicator must point in the
direction of flow.
b. The Indicator can also be used to change the
orientation of the housing for a better view of the
meter's display. Note that the 2 set screws must
be loosened before the housing will turn.
[refer to p. 18 for more information]
4. Ensure correct probe depth setting. If using 1 ½"
size pipe, please see note on p. 18.
5. Open the housing. If needed, the orientation of
display can be rotated in 90° increments for a
better view.
[refer to p. 20 for more information]
6. Ensure power wiring and 4 to 20mA wiring are
properly connected
[refer to p. 28 - p. 30 for more information]
7. Verify you have the proper output signal wiring
setup based on model type (Pulse/Alarm or
communication protocol)
[refer to p. 31 - p. 33 for more information]
8. Power on the flow meter
9. Check the remaining flow meter settings by accessing the meter settings either through the front panel
of the display or by using the FT1 View™ software tool. Record the settings in the spaces given for
items A - E on the following page.
Use the table and images below as a guide while using the worksheet on the next page to record your notes.
NOTE: Please read the entire Quick-start procedure before beginning installation.
ID OD
FLOW
10X
Pipe ID min.
15X
Pipe ID min.
INDICATOR:
- POINT IN DIRECTION
OF FLOW
- REMOVE TO ROTATE
HOUSING ±90º, ±180º
- REPLACE INDICATOR
WHEN DONE
LOOSEN
HOUSING
WITH 2 FRONT
SET SCREWS,
RETIGHTEN
WHEN DONE
FLOW
FLOW
PIPE
0.73"
(18.5 mm)
L
C
F1 F2 F3 F4
ACCESS DISPLAY
BY UNSCREWING COVER
REMOVE SCREWS ON
DISPLAY TO ROTATE
DISPLAY ±180°
( - ) (+) ( - ) (+) ( - ) (+)
Power
12-28VDC
4-20mA Pulse
/Alarm
!
( - ) (+) ( - ) (+) (
- ) (+)
Power
12-28VDC
4-20mA Pulse
/Alarm
!(
- ) (+)
Power
12-28VDC
4-20mA(
-
)
!
4-20mA(+) Common Tx/Rx(
-
)
Tx/Rx(+)
F1 F2 F3 F4
Initializing...
12
Model FT1
DISCLAIMER
12
INTRODUCTION
Introduction: Quick Start Guide

Item to verify
Serial Number: Serial Number: Serial Number: Serial Number:
1. What is the Pipe ID? ID = ID = ID = ID =
2. Calculate the Upstream/
Downstream straight-pipe
requirements
UP =
DN =
UP =
DN =
UP =
DN =
UP =
DN =
3. a. Is the flow indicator
pointed in direction of flow?
b. Must the housing be
rotated for easy viewing?
Y / N
Y / N
Y / N
Y / N
Y / N
Y / N
Y / N
Y / N
4. Is the probe depth setting
correct?
Y / N Y / N Y / N Y / N
5. Have you rotated the display
for easier viewing?
Y / N Y / N Y / N Y / N
6. Verify proper power wiring
setup
7. Verify proper output wiring
setup
After powering on your meter, check items A - E below by accessing the meter settings either through the
front panel of the meter's display or by using the FT1 View™ software tool.
A. Which flow units have been
set in meter? (SCFM, KG/H,
etc..)
B. Correct values for reference
temperature and pressure?
Y / N Y / N Y / N Y / N
C. Confirm the pipe ID listed
above same as "Pipe_id="
D. Verify the 4mA and 20mA
meter settings
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
E. Confirm the correct gas is
selected for your application
in the Gas-SelectX®menu
Your Notes:
Before powering on your meter, use this worksheet to record your notes.
If you are experiencing any problems after completing this procedure, please call the Fox Service Department
at 831-384-4300 to review this information.
13
Model FT1
INTRODUCTION
Introduction: Quick Start Guide

Thank you for purchasing the Model FT1 Thermal Gas Mass Flow Meter from Fox
Thermal Instruments. The Model FT1 is one of the most technically advanced
flow meters in the world. Extensive engineering effort has been invested to deliver
advanced features, accurate measurement performance and outstanding reliability.
This Instruction Manual contains the electrical and mechanical installation instructions
as well as details for programming, maintaining and troubleshooting the meter.
This manual is divided into the following sections: Introduction, Installation, Wiring,
Operation, Maintenance, Troubleshooting, Appendices, Glossary and Index.
Theory of Operation
The Model FT1 is an innovative Thermal Mass Gas Flow Meter and Temperature
Transmitter. It is microprocessor-based and field programmable. The FT1 thermal
sensor operates on the law that gases absorb heat. A heated sensor placed in an air
or gas stream transfers heat in proportion to the stream’s mass velocity. There are
two sensor elements. One sensor element detects the gas temperature and a second
element is maintained at a constant temperature above the gas temperature. The
energy transferred from the heated element is proportional to the mass flow velocity.
The FT1 flow meter maintains accurate flow measurement over a large temperature
and pressure range.
Mass Flow
The Model FT1 measures mass flow; an advantage over other flow meters which
measure volumetric flow rate. Volumetric flow is incomplete because temperature
and pressure are unknown and must be measured separately. For example, the mass
flow of a gas depends on its temperature and pressure. As temperature and pressure
changes, the gas volume changes but not its mass. Therefore a device measuring
mass flow is independent of temperature and pressure changes. The Model FT1
provides a direct measurement of gas flow in Mass units (kg/hr, lb/hr), standard units
(SCFM, SLPM) or normal units (NM3/hr, NLPM) with no additional temperature or
pressure measurements required.
Flow Calibration
The Fox Calibration Lab maintains instrument calibration data on every flow meter.
Calibration files include details on process conditions, customer gas, line size and
other information. All NIST-traceable equipment utilized for the calibration procedure is
identified on the Calibration Certificate, which is sent with every flow meter.
DDC-Sensor™Technology Description
The 2nd Generation Fox DDC-Sensor™ is a new state of the art sensor technology
used in the Fox Model FT1 Thermal Gas Flow Meter. The DDC-Sensor™, a Direct
Digitally Controlled sensor, is unlike other thermal flow sensors available on the market.
Instead of using traditional analog circuitry, the DDC-Sensor™ is interfaced directly
to the FT1 microprocessor for more speed and programmability. The DDC-Sensor™
quickly and accurately responds to changes in process variables by utilizing the
microprocessor to determine mass flow rate, totalized flow, and temperature.
14
Model FT1
DISCLAIMER
14
INTRODUCTION
Introduction
Product
Description
Mass Flow
Welcome
Flow
Calibration
DDC-Sensor™
Technology

Standard I/O
4 to 20 mA Flow or Temperature
Pulse or Alarm
USB
(Free FT1 View Software)
Outputs and Communications are
Galvanically Isolated
Selectable Output Options
RS485 Modbus RTU, BACnet MS/TP
HART Communication
Standard Digital Communications
12-28VDC Input Power
Display and
Conguration Panel
F1 F2 F3 F4
Fox’s DDC-Sensor™ provides a technology platform for calculating accurate gas
correlations. The FT1 correlation algorithms allow the meter to be calibrated on a
single gas in the factory while providing the user the ability to select other gases in the
Gas-SelectX®gas menu. Fox’s Model FT1 with its DDC-Sensor™ and state-of-the-art
correlation algorithms provide an accurate, multi-gas-capable thermal gas flow meter.
I/O Description
The FT1 features a galvanically isolated 4 to 20mA analog output with HART
communication option and a second output for pulse, RS485 Modbus RTU or BACnet
MS/TP. There is also a USB port for interfacing with a laptop or computer. The 4 to
20mA output can be configured for flow rate or process gas temperature and can be
scaled by the user. The pulse output can be used for pulse or alarm, is programmable
to represent flow rate and can be scaled for maximum flow/maximum frequency,
units-per-pulse or pulse-per-units. The maximum frequency is 100 Hz.
FT1 View™ interfaces to the USB port and is a free PC-based software program that
displays flow meter readings and permits flow meter configuration. The software is
available for download on the Fox website. Industry standard communication options
are available including optional RS485 Modbus RTU, BACnet MS/TP, or HART.
FT1 Functional Diagram
An on-board 2 line x 16 character backlit LCD display shows flow rate, total flow,
elapsed time, process gas temperature, and alarms. The display is also used in
conjunction with the Configuration Panel for field configuration of flow meter settings
such as 4 to 20mA scaling, frequency output scaling, pipe area, zero flow cutoff, flow
filtering or dampening, display configurations, diagnostics, and alarm limits.
Fig. 1.9: FT1 Function Diagram
15
Model FT1
INTRODUCTION
Introduction
I/O Description
Display

Installation
- Model FT1
Flow Meter
Scope
This section describes how to install the Fox Model FT1 Flow Meter and how to get
started:
1. Determine lateral position on the pipe
2. Sensor installation depth
3. Sensor orientation in relation to sensor length and direction of flow
4. Proper tightening of compression fitting for mounting meter
Installation procedures must be performed using a combination of the end user’s
best engineering practices, in compliance with local codes, and manufacturer’s
recommendations.
General Precautions
The following general precautions should be observed:
1. Exercise care when handling the flow meter to avoid damaging the probe, sensor
or enclosure.
2. The enclosure cover must be closed except during installation or configuration.
3. Mounting FT1 in direct sunlight can cause the temperature inside the enclosure
to increase beyond design limits, resulting in failure of LCD display and reduced
component life. It is recommended that a sunshade be installed to avoid direct
sunlight (see maximum enclosure operating temperature specification).
4. Ensure the flow direction indicator/pointer for the meter is in line with the direction
of flow in the pipe.
5. Do not install the FT1 enclosure near an igniter, igniter-controller or switching
equipment.
6. Do not install an external power supply in a cabinet containing an igniter controller
or switching equipment.
7. For accurate flow measurement: review flow meter placement instructions before
installation to ensure a proper flow profile in the pipe.
8. For safety reasons, Teflon ferrules are only appropriate for applications with
pressures of 60 psig or less. At higher pressures, use of a Teflon ferrule risks
unwanted probe movement or ejection of the probe from the pipe. For all
applications above 60 psig, the standard stainless steel ferrule is required.
16
Model FT1
INSTALLATION
Installation: General
Insertion Flow
Meter Lateral
Placement

FLOW
10X Pipe ID min.
Proper
Flow
Prole
15X Pipe ID min.
Irregular Flow
Prole
F1 F2 F3 F4
F1 F2 F3 F4
i
i
Instructions for Insertion Flow Meter Lateral Placement
Install the Model FT1 Insertion style flow meter so that it is far enough away from
bends in the pipe, obstructions, or changes in line sizes to ensure a consistent flow
profile. Fifteen diameters of straight pipe upstream and ten downstream are required.
For example, a 2" pipe would require 30" upstream and 20" downstream, but a 4" pipe
would require 60" upstream and 40" downstream.
NOTE: The probe diameter is ¾".
Fig. 2.1: Upstream and Downstream Pipe IDs for Insertion Meters
Special Conditions of Use:
• Consult the manufacturer if dimensional information on the flameproof
joints is necessary.
• The flamepaths of the equipment are not intended to be repaired. Consult
the manufacturer if repair of the flamepath joints is necessary
• Follow the manufacturer's instructions to reduce the potential of an
electrostatic charging hazard.
NOTE: An irregular flow profile may affect sensor accuracy.
17
Model FT1
INSTALLATION
Installation: Insertion Type
Insertion Flow
Meter Lateral
Placement

"D"
D/2
"L"
MARK ON PROBE
.73
[18.5mm]
INSERTION DEPTH:
L + D/2 + .73"
CUSTOMER'S PIPE Ø.75 PROBE
COMPRESSION FITTING,
Ø.75”TUBE, 316 SST,
BY FOX
PROCESS CONNECTION ,
1 INCH NPT, FEMALE,
BY CUSTOMER
Installation Depth
The installation depth of the sensor in the pipe is dependent on the pipe size. To get
the most accurate reading, proper placement of the sensor window within the pipe is
necessary. As shown in Fig 2.2, the end of the sensor window should be 0.73" (18.5
mm) past the center line of the pipe. Review the dimensional drawing below with the
following equation to calculate insertion depth: L + D/2 + .73” = insertion depth
Fig. 2.2: Cross Section of Insertion Sensor Depth in Pipe
Rotating the Enclosure
The Model FT1 has been designed to allow the enclosure to rotate into four positions
for optimal viewing of the display. To rotate the enclosure, first loosen the two set
screws near the Flow Direction Indicator. Then unscrew and remove the Flow Direction
Indicator to allow the enclosure to swivel into the desired position. Then screw the
Flow Direction Indicator back into its place, ensure that it points in the direction of flow,
and tighten the set screws. See figure 2.3.
NOTE: For 1½"
(38mm) pipes, insert
the probe fully so
that it reaches the
bottom inside of the
pipe, then lift up 0.2"
(5mm) for proper
depth setting.
18
Model FT1
INSTALLATION
Installation: Insertion Type
Installation
Depth
Rotating the
Enclosure

CUSTOMER
PIPE
Note: Rotational
misalignment
should not exceed
±5°
TOP VIEW
SIDE VIEW
CUSTOMER
PIPE
+5°
-5°
FLOW
FLOW DIRECTION
INDICATOR
SET SCREW
FLOW DIRECTION
INDICATOR
FLOW
Direction of Flow and Orientation of the Probe Sensor
Install the meter with the flow direction indicator pointing in the direction of flow in the
pipe. To rotate the enclosure/probe, unscrew the Flow Direction Indicator and the Set
Screws, rotate the housing ±90° or 180°, and return the Flow Direction Indicator and
Set Screws in order to secure the new placement.
Fig. 2.3: Orientation of Flow Meter and Rotation of Housing
19
Model FT1
INSTALLATION
Installation: Insertion Type
Sensor
Orientation -
Direction of
Flow

F1 F2 F3 F4
Loosen these two screws to
open the display and access
wiring terminals. Loosen these three screws
to rotate the display in 90°
increments (±180°).
Changing the Orientation of the FT1 Display
The display can be rotated in 90° increments for optimal viewing of the screen. First,
open the enclosure by unscrewing the enclosure cap and loosen the two captive
phillips screws to open the display assembly. Detach the display board from the
metal shield by loosening the three screws on the back of the round shield. Rotate the
display board to the desired orientation. Ensure that the display cable is routed flat and
straight through the display hinge to prevent binding. Reattach the display board to the
metal shield by tightening the three screws. Close the display assembly and secure it
to the enclosure with the two captive screws. Finally, install the enclosure cover back
on the front of the enclosure.
Fig. 2.4 - Accessing Wriring Terminals or Rotating the Display
20
Model FT1
INSTALLATION
Installation: Insertion Type
Changing
Display
Orientation