Onicon Fox Thermal FT1 User manual

106012
Rev. K
Model FT1
Fox Thermal
www.foxthermal.com | 399 Reservation Road Marina, CA. 93933
THERMAL MASS FLOW METER
& TEMPERATURE TRANSMITTER
Precision Mass Flow Measurement
An ON
I CON Brand

Fox Thermal FT1 Manuals:
• Fox Thermal FT1 View™ Manual
All Fox Thermal 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: [e-mail]
Download Technical Data Sheets from our website:
www.foxthermal.com
Fox Thermal Instruments, Inc. (Fox Thermal) believes that the information
provided herein is accurate; however, be advised that the information
contained herein is NOT a guarantee for satisfactory results. Specically,
this information is neither a warranty nor guarantee, expressed or implied,
regarding performance, merchantability, tness, or any other matter with
respect to the products; nor recommendation for the use of the product/
process information in conict with any patent. Please note that Fox
Thermal reserves the right to change and/or improve the product design
and specication without notice.

3
Model FT1
TABLE OF CONTENTS
Table Of Contents
1. Introduction Page 4
a. Quick Start Guide Page 4
b. Menu Trees Page 6
c. General Page 14
2. Installation (Mechanical) Page 17
a. Lateral Placement Page 18
b. Welding Branch Outlet to Pipe (Insertion) Page 20
c. Installation Depth Page 21
d. Orientation Page 22
e. Mounting Instructions Page 24
f. Retractor Installation Page 19
3. Wiring (Electrical) Page 29
a. Wiring Access Page 29
b. Input Power Page 31
c. Signal Wiring Page 32
d. Pulse/Alarm Wiring (optional feature) Page 34
e. RS485 Wiring: Modbus RTU or BACnet MS/TP (optional feature) Page 36
f. HART wiring Page 37
4. Operation (Standard Operation) Page 40
a. Start Up Page 40
b. Programming Page 42
c. CAL-V™ Page 60
d. Gas-SelectX®Page 63
5. Communication Protocols Page 21
a. Modbus RTU (RS485) Page 21
b. BACnet MS/TP (RS485) Page 78
c. HART Page 82
6. Maintenance Page 88
a. Safe Meter Removal from Retractor Page 90
b. Troubleshooting Page 94
7. Appendices Page 99
a. Specications Page 99
b. Agency Approvals Page 101
c. Dimensions Page 102
d. Warranty Page 103
e. Returning your meter Page 107
8. Denitions Page 108
9. Index Page 109

1. Record inside diameter (ID). Ensure the
actual pipe ID matches the pipe ID shown
on the factory calibration certicate. If IDs
do not match, refer to p. 54.
2. Record upstream and downstream
straight-pipe requirements based on Pipe
ID and meter style (insertion/inline).
[refer to p. 18 for more information]
3. a. The Flow Direction Indicator must point
in the direction of ow.
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.
[refer to p. 22 for more information]
4. Ensure correct probe depth setting. If
using 1 ½" size pipe, please see note on
p. 21.
5. Open the housing. If needed, the
orientation of display can be rotated in
90° increments for a better view.
[refer to p. 23 for more information]
6. Ensure power wiring and 4-20mA wiring
are properly connected
[refer to p. 31 - p. 33 for more
information]
7. Verify the output signal wiring based
on model type (Pulse/Alarm or
communication protocol)
[refer to p. 34-p. 36 for more]
8. Power on the ow meter
9. Check the remaining ow 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 Outside
Diameter
FLOW
4X = Inline
10X = Insertion
8X = Inline
15X = Insertion
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
PrecisionMass Flow Measurement
AnON I
CONBrand
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...
4
Model FT1
DISCLAIMER
4
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 ow indicator
pointed in direction of
ow?
b. Has housing been
rotated to view display?
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. Has display been rotated
for viewing?
Y / N Y / N Y / N Y / N
6. Verify proper power
wiring
7. Verify proper output
wiring
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 ow 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. Conrm the pipe ID
above to "Pipe_id="
D. Verify the 4mA and 20mA
meter settings
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
E. Conrm the correct gas
is 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
Thermal Service Department at 831-384-4300 to review this information.
5
Model FT1
INTRODUCTION
Quick Start Guide

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scrolling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. 42)
(p. 50)
Display Menu, p. 10
Flow Menu 1, p. 8
Digital Output Menu, p. 7
6
Model FT1
DISCLAIMER
6
INTRODUCTION
Fig. 1.1: FT1 Menu Tree - Main Menu
Introduction: Menu Trees

OUT=Pulse
NXTOK
Notused
Pulse
HiFloAlm
LoFloAlm
HiTempAlm
LoTempAlm
SystemAlm
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
OUT=SystemAlm
NXTOK
SystemAlarm
(p. 48)
(p. 54)
(See Flow Menu 2, p. 9, for more alarm
settings)
(p. 46)
7
Model FT1
INTRODUCTION
Fig. 1.2: FT1 Menu Tree - Digital Output
Introduction: Menu Trees

FLOWMENU1
DGNUNTFM2EXIT
DIAGNOSTIC
SIMCAL‐VEXIT
FloSim=0SCFM
CHGOK
TmpSim=0°F
CHGOK
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
ENABLESIM?
YESNO
(p. 58) (p. 51)
Flow Menu 2 Menu, p. 9
CAL-V™ Menu, p. 11
8
Model FT1
DISCLAIMER
8
INTRODUCTION
Fig. 1.3: FT1 Menu Tree - Flow Menu 1
Introduction: Menu Trees

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. 56)
(p. 53)
(p. 54)
Gas-SelectX
®
Menu, p. 12
9
Model FT1
INTRODUCTION
Fig. 1.4: FT1 Menu Tree - Flow Menu 2
Introduction: Menu Trees

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. 50)(p. 48)
10
Model FT1
DISCLAIMER
10
INTRODUCTION
Fig. 1.5: FT1 Menu Tree - Display Menu
NOTE! All readings updated every second
• Flo Rate = Flow rate of process gas
• Total = Total ow of process gas
• Elps = Elapsed time since reset of ow total
• Temp = Temperature of process gas
• Alarm = Notication of errors; diagnostic errors
Introduction: Menu Trees

DIAGNOSTICMENU
SIMCAL‐VEXIT
CAL‐VMENU
VEREXIT
VerifyingCAL‐V
PleaseWait
VerifyingCAL‐V
0.512T=123
CAL‐V=0.259
PassOK
Displaysthetest’s
countdowntimer
DisplaysaCAL‐Vvalue
duringtest
VERIFYCAL‐V?
YESNO
CAL‐V=0.911
WarningOK
CAL‐V=2.321
FailOK
FLOWMENU1
DGNUNTFM2EXIT
MAINMENU
I/OFLODSPEXIT
CAL‐VFail
Greaterthan±1.0
CAL‐VPass
Lessthan±0.80
CAL‐VWarning
Between±0.80to±1.0
Flo:Holdvalue
NXTEXITOK
Holdvalue
Gotozero
TakeControl
Off‐lineEXITOK
(p. 60)
11
Model FT1
INTRODUCTION
Fig. 1.6: FT1 Menu Tree - CAL-V™ Menu
Introduction: Menu Trees

FLOWMENU2
GASSPCPRMEXIT
Propane=0%
UPDNOK
GAS=%Mix
NXTOK
Methane
CO2
Nitrogen
Helium
Nat.Gas(mix)
Argon
Hydrogen
Air
Propane
Butane
Oxygen
Ethane
%Mix
Oxygen=0%
UPDNOK
GasMix(100%)
OK
Onlyfor
gasmix
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5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five(5)gasesare
allowed.PressingOK
returnstogasentry.
SelectuptofivegasesforGas
Mix.Besuremixtureequals100%.
OR OR
Helium=0%
UPDNOK
Ethane=0%
UPDNOK
GAS=Methane
NXTOK
(p. 63)
12
Model FT1
DISCLAIMER
12
INTRODUCTION
Introduction: Menu Trees
Fig. 1.7: FT1 Menu Tree - Gas-SelectX
®
Menu
The most recent list
of available gases can
be found on the Fox
Thermal website:
www.foxthermal.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
CAL‐V=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
CAL‐V™measurementvalue

13
Model FT1
INTRODUCTION
Introduction: Menu Trees
Fig. 1.8: FT1 Menu Tree - Engineering Display

Welcome
Thank you for purchasing the Model FT1 Thermal Gas Mass Flow Meter from Fox Thermal.
The Model FT1 is one of the most technically advanced ow 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 eld 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 ow velocity. The FT1 ow meter maintains accurate ow measurement over a large
temperature and pressure range.
Mass Flow
The Model FT1 measures mass ow; an advantage over other ow meters which measure
volumetric ow rate. Volumetric ow is incomplete because temperature and pressure are
unknown and must be measured separately. For example, the mass ow 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 ow is independent of temperature and
pressure changes. The Model FT1 provides a direct measurement of gas ow 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 Thermal Calibration Lab maintains instrument calibration data on every ow meter.
Calibration les include details on process conditions, customer gas, line size and other
information. All NIST-traceable equipment utilized for the calibration procedure is identied
on the Calibration Certicate, which is sent with every ow meter.
14
Model FT1
DISCLAIMER
14
INTRODUCTION
Introduction

Calibration Validation
Validate the calibration of the FT1 in the eld using the CAL-V™ test. The goal of Calibration
Validation is to provide operators with the ability to verify that the meter is capturing accurate
data at scheduled recalibration times - or at any time - instead of sending the meter back to
the factory for recalibration. By performing CAL-V™ in the eld, operators can verify that the
meter is running accurately by testing the functionality of the sensor and its associated signal
processing circuitry. This test can be done in the pipe under normal processing conditions.
DDC-Sensor™Technology Description
The 2nd Generation Fox Thermal DDC-Sensor™ is a new state of the art sensor technology
used in the Fox Thermal Model FT1 Thermal Gas Flow Meter. The DDC-Sensor™, a Direct
Digitally Controlled sensor, is unlike other thermal ow 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 ow rate, totalized ow, and temperature.
Fox Thermal’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 Thermal’s Model FT1 with its DDC-Sensor™ and state-of-the-art correlation
algorithms provide an accurate, multi-gas-capable thermal gas ow meter.
I/O Description
The FT1 features a galvanically isolated 4-20mA analog output with HART communication
option and a second output for pulse, Modbus RTU (RS485) or BACnet MS/TP (RS485).
There is also a USB port for interfacing with a laptop or computer. The 4-20mA output can
be congured for ow 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 ow rate and can
be scaled for maximum ow/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
ow meter readings and permits ow meter conguration. The software is available for
download on the Fox Thermal website. Industry standard communication options are available
including optional Modbus RTU (RS485), BACnet MS/TP (RS485), or HART.
15
Model FT1
INTRODUCTION
Introduction

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
Configuration Panel
F1 F2 F3 F4
Specic Conditions of Use:
• The ameproof joints of the equipment are not intended to be
repaired. Consult the manufacturer if dimensional information on
the ameproof joints is necessary.
• Follow the manufacturer's instructions to reduce the potential of an
electrostatic charging hazard.
FT1 Functional Diagram
An on-board 2 line x 16 character backlit LCD display shows ow rate, total ow, elapsed
time, process gas temperature, and alarms. The display is also used in conjunction with the
Conguration Panel for eld conguration of ow meter settings such as 4-20mA scaling,
frequency output scaling, pipe area, zero ow cutoff, ow ltering or dampening, display
congurations, diagnostics, and alarm limits.
Fig. 1.9: FT1 Function Diagram
16
Model FT1
INTRODUCTION
Introduction

Installation Scope
This section describes how to install the Fox Thermal Model FT1 Flow Meter and how to get
started. Installation methods will vary according to the ow meter type (insertion or inline).
For Insertion Types:
1. Determine lateral position on the pipe
2. Determine if tilted installation is needed due to moisture or condensation in the gas
3. Verify sensor installation depth
4. Determine sensor orientation in relation to sensor length and direction of ow
5. Determine if the display orientation must be changed
6. Ensure proper tightening of compression tting for mounting meter
For Inline Types
1. Determine lateral position on the pipe
2. Determine if tilted installation is needed due to moisture or condensation in the gas
3. Ensure the correct ow body orientation in relation to direction of ow in pipe
4. Determine if the display orientation must be changed
5. Ensure proper tightening of compression tting 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 ow meter to avoid damaging the probe, sensor or
enclosure.
2. Close any unused conduit openings in the enclosure with plugs certied for your
application.
3. The enclosure cover must be closed except during installation or conguration.
4. 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 specication).
5. Ensure the ow direction indicator/pointer for the meter is in line with the direction
of ow in the pipe.
6. Do not install the FT1 enclosure near an igniter, igniter-controller or switching
equipment.
7. Do not install an external power supply in a cabinet containing an igniter controller
or switching equipment.
8. For accurate ow measurement: review ow meter placement instructions before
installation to ensure a proper ow prole in the pipe.
9. For safety reasons, Teon ferrules are only appropriate for applications with
pressures of 60 psig or less. At higher pressures, use of a Teon 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.
17
Model FT1
INSTALLATION
Installation

FLOW
10X Pipe ID min.
Proper
Flow
Profile
15X Pipe ID min.
F1 F2 F3 F4
FLOW
4X Pipe ID
Proper
Flow
Profile
8X Pipe ID
Branch Outlet
(installed by
customer)
Irregular Flow
Profile
F1 F2 F3 F4
Irregular Flow
Profile
INSERTION
INLINE
Instructions for Flow Meter Lateral Placement
Install the Model FT1 ow meter so that it is far enough away from bends in the pipe,
obstructions, or changes in line sizes to ensure a consistent ow prole. See Fig. 2.1 below for
your meter type (insertion/inline).
Fig. 2.1: Upstream and Downstream Pipe IDs for Flow Meters
NOTE!
• ID = Inside Diameter
• The probe diameter is ¾"
• An irregular flow profile will affect sensor accuracy
i
Tilt Installations - Moisture in the Gas or CondensationTilt Installations - Moisture in the Gas or Condensation
Tilted variations on installations help prevent moisture and condensation from formingTilted variations on installations help prevent moisture and condensation from forming
on the sensor and disrupting accurate ow measurement. Fox Thermal recommends 180° on the sensor and disrupting accurate ow measurement. Fox Thermal recommends 180°
installation if the gas may have moisture or condensation, if possible. Contact Fox for furtherinstallation if the gas may have moisture or condensation, if possible. Contact Fox for further
recommendations.recommendations.
Fig. 2.2:Fig. 2.2: Tilt Installation at 180°Tilt Installation at 180°
Alternate Installations - Vertical Pipes or Restricted Installation Spaces
When restricted physical installation space exists, the FT1 can also be installed at other angles.When restricted physical installation space exists, the FT1 can also be installed at other angles.
Please note that the display and the enclosure orientation can be rotated in 90° increments.Please note that the display and the enclosure orientation can be rotated in 90° increments.
Fig. 2.3: Alternate Installation at 90° (CCW)
18
Model FT1
INSTALLATION
Installation

Tilt Installations - Moisture in the Gas or CondensationTilt Installations - Moisture in the Gas or Condensation
Tilted variations on installations help prevent moisture and condensation from formingTilted variations on installations help prevent moisture and condensation from forming
on the sensor and disrupting accurate ow measurement. Fox Thermal recommends 180° on the sensor and disrupting accurate ow measurement. Fox Thermal recommends 180°
installation if the gas may have moisture or condensation, if possible. Contact Fox for furtherinstallation if the gas may have moisture or condensation, if possible. Contact Fox for further
recommendations.recommendations.
Fig. 2.2:Fig. 2.2: Tilt Installation at 180°Tilt Installation at 180°
Alternate Installations - Vertical Pipes or Restricted Installation Spaces
When restricted physical installation space exists, the FT1 can also be installed at other angles.When restricted physical installation space exists, the FT1 can also be installed at other angles.
Please note that the display and the enclosure orientation can be rotated in 90° increments.Please note that the display and the enclosure orientation can be rotated in 90° increments.
Fig. 2.3: Alternate Installation at 90° (CCW)
19
Model FT1
INSTALLATION
Installation

Welding NPT Female Fitting to Pipe
The probe of the FT1 must be installed perpendicular in the pipe to measure ow accurately.
Use the following steps to ensure that the 1" NPT female tting is correctly welded to the pipe.
Directions:
1. Drill a 0.781" (25/32") hole inside the tting through the wall of the pipe (1 wall only).
2. Assemble the compression tting and NPT tting hand tight onto the probe of the FT1.
3. Insert the probe into the hole in the pipe and use the FT1 probe and compression tting to
align the NPT tting with the hole and the probe perpendicular to the pipe.
4. Tack-weld the NPT female tting carefully onto the pipe.
• Before welding the tting completely, verify the probe is aligned to the center of the
pipe and the hole is centered in the NPT tting (see Figure 2.4).
5. To verify that the correct hole position has been achieved,carefully slide the 0.75" sensor in
and out of the NPT female tting and 0.781" hole.
WARNING! Do not force the 0.75" sensor through the 0.781" hole. Forcing it through
the 0.781" hole can damage the probe.
6. Verify that the temporary weld of the NPT female tting positions the probe window on the
pipe's centerline.
• Figure 2.4 shows an incorrect welding of the NPT female tting, causing the 0.75" sensor
to be "off center".
7. Once the NPT tting is aligned properly, remove the 0.75" sensor from the NPT female
tting and nish welding. Then verify the probe is still aligned with the center of the pipe.
8. Set the depth of the ow meter (see "Fig. 2.5: Cross Section of Insertion Sensor Depth in
Pipe" on page 21).
Do not tighten Swage tting until proper depth of ow meter is determined. See Fig. 2.5.
Fig. 2.4: Alignment of NPT Female Fitting
PIPE
CENTERLINE
CORRECT NPT FEMALE
FITTING
CENTERED
0.781”
HOLE
PIPE
Ø.75"
PROBE
PIPE
CENTERLINE
INCORRECT NPT FEMALE
FITTING
OFF
CENTER
0.781”
HOLE
PIPE
Ø.75"
PROBE
20
Model FT1
INSTALLATION
Installation