Fox Thermal FT1 User manual

106012
Rev. H
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
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 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. Menu Trees Page 4
b. Quick Start Guide Page 12
2. Installation (Mechanical) Page 16
a. Installation Depth Page 20
b. Orientation of Flowmeter Page 21
c. Rotating the Probe/Enclosure Page 21
d. Changing the Orientation of the Display Page 29
e. Mounting Instructions Page 23
3. Wiring (Electrical) Page 28
a. General Wiring Page 30
b. Input Power Page 30
c. Signal Wiring Page 31
d. Pulse/Alarm Wiring (optional feature) Page 33
e. RS485 Wiring: Modbus RTU or BACnet MS/TP (optional feature) Page 35
f. HART wiring Page 36
4. Operation (Standard Operation) Page 38
a. Start Up Page 38
b. Programming Page 40
c. Zero CAL-CHECK®Page 58
d. Gas-SelectX®Page 62
5. Communication Protocols Page 67
a. RS485 Modbus RTU Page 67
b. BACnet MS/TP Page 75
c. HART Page 79
6. Maintenance Page 84
a. Precautions Page 84
b. General Page 85
c. Troubleshooting Page 90
7. Appendices Page 95
 Page 95
b. Agency Approvals Page 97
c. Dimensions Page 98
d. Warranty Page 99
e. Returning your meter Page 103
8. Glossary of Terms and Abbreviations Page 104
9. Index Page 105

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. 40)
(p. 47)
Display Menu, p. 8
Flow Menu 1, p. 6
Digital Output Menu, p. 5
4
Model FT1
DISCLAIMER
4
DISCLAIMER
INTRODUCTION
Fig. 1.1: FT1 Menu Tree - Main Menu
Introduction: Menu Trees

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



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. 46)
(p. 52)
(See Flow Menu 2, p. 7, for more alarm
settings)
(p. 44)
5
Model FT1
INTRODUCTION
Fig. 1.2: FT1 Menu Tree - Digital Output
Introduction: Menu Trees

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

























TMPUNT=°F
NXTOK


TmpRef=60°F
CHGOK
PRESUNT=Psia
NXTOK
PresRef=14.73
CHGOK




SimulateFlow?
YESNO
SimulateTemp?
YESNO
DNS=1.2323kg/m3
OK
MAINMENU
I/OFLODSPEXIT
(p. 56) (p. 48)
Flow Menu 2 Menu, p. 7
Zero CAL-CHECK
®
Menu, p. 9
6
Model FT1
DISCLAIMER
6
DISCLAIMER
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
 

 

 


RESTOREDATABASE?
YESNO
SETNRT?
YESNO
AREYOUSURE?
YESNO
TOTRSTDISABLED
OK



WARNING:‐


MAINMENU
I/OFLODSPEXIT
FLOWMENU1
DGNUNTFM2EXIT
(p. 54)
(p. 51)
(p. 52)
Gas-SelectX
®
Menu, p. 10
7
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. 48)(p. 46)
8
Model FT1
DISCLAIMER
8
DISCLAIMER
INTRODUCTION
Fig. 1.5: FT1 Menu Tree - Display Menu
NOTE! All readings updated every second
• Flo Rate = Flow rate of process gas
• 
• 
• Temp = Temperature of process gas
• 
NOTE! All readings updated every second
•
Flo Rate = Flow rate of process gas
•

•

•
Temp = Temperature of process gas
•

Introduction: Menu Trees

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. 60)
9
Model FT1
INTRODUCTION
Fig. 1.6: FT1 Menu Tree - Zero CAL-CHECK
®
Menu
Introduction: Menu Trees

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
Ethane
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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
(p. 62)
10
Model FT1
DISCLAIMER
10
DISCLAIMER
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
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

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
Fig. 1.8: FT1 Menu Tree - Engineering Display

1. Record inside diameter (ID). Ensure the
actual pipe ID matches the pipe ID shown

do not match, refer to p. 52.
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

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. 20 for more information]
4. Ensure correct probe depth setting. If
using 1 ½" size pipe, please see note on
p. 20.
5. Open the housing. If needed, the
orientation of display can be rotated in
90° increments for a better view.
[refer to p. 22 for more information]
6. Ensure power wiring and 4-20mA wiring
are properly connected
[refer to p. 30 - p. 32 for more
information]
7. Verify the output signal wiring based
on model type (Pulse/Alarm or
communication protocol)
[refer to p. 33-p. 35 for more]
8. 
9. 
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...
12
Model FT1
DISCLAIMER
12
DISCLAIMER
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. 
pointed in direction of

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. 
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. 
above to "Pipe_id="
D. Verify the 4mA and 20mA
meter settings
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
E. 
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.
13
Model FT1
INTRODUCTION
Introduction: Quick Start Guide

Welcome
Thank you for purchasing the Model FT1 Thermal Gas Mass Flow Meter from Fox Thermal.

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.

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

temperature and pressure range.
Mass Flow



its temperature and pressure. As temperature and pressure changes, the gas volume changes


(kg/hr, lb/hr), standard units (SCFM, SLPM) or normal units (NM3/hr, NLPM) with no additional
temperature or pressure measurements required.
Flow Calibration




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

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

14
Model FT1
DISCLAIMER
14
DISCLAIMER
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
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

I/O Description
The FT1 features a galvanically isolated 4-20mA analog output with HART communication
option and a second output for pulse, RS485 Modbus RTU or BACnet MS/TP. There is also




frequency is 100 Hz.
FT1 View™ interfaces to the USB port and is a free PC-based software program that displays

download on the Fox Thermal website. Industry standard communication options are available
including optional RS485 Modbus RTU, BACnet MS/TP, or HART.
FT1 Functional Diagram

time, process gas temperature, and alarms. The display is also used in conjunction with the



Fig. 1.9: FT1 Function Diagram
15
Model FT1
INTRODUCTION
Introduction

Scope
This section describes how to install the Fox Thermal Model FT1 Flow Meter and how to get

For Insertion Types:
1. Determine lateral position on the pipe
2. Verify sensor installation depth
3. 
4. Determine if the display orientation must be changed
5. 
For Inline Types
1. Determine lateral position on the pipe
2. 
3. Determine if the display orientation must be changed
4. 
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.
Specic Conditions of Use:
• 
repaired. Consult the manufacturer if dimensional information on

• Follow the manufacturer's instructions to reduce the potential of an
electrostatic charging hazard.
Specic Conditions of Use:
•

repaired. Consult the manufacturer if dimensional information on

•
Follow the manufacturer's instructions to reduce the potential of an
electrostatic charging hazard.
16
Model FT1
INSTALLATION
Installation

General Precautions
The following general precautions should be observed:
1. 
enclosure.
2. 
application.
3. 
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

5. 

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. 

9. 

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


your meter type.
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
NOTE!
•
ID = Inside Diameter
•
The probe diameter is ¾"
•
An irregular flow profile will affect sensor accuracy
i
18
Model FT1
INSTALLATION
Installation

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
Welding NPT Female Fitting to Pipe


Directions:
1. 
2. 
3. 

4. 
• 

5. To verify that the correct hole position has been achieved,carefully slide the 0.75-inch

WARNING! Do not force the 0.75-inch sensor through the 0.781-inch hole. Forcing it
through the 0.781-inch hole can damage the probe!
6. 
pipe's centerline.
• 
sensor to be "off center".
7. 

8. 
Pipe" on page 21).

Fig. 2.2: Alignment of NPT Female Fitting
19
Model FT1
INSTALLATION
Installation

"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. 2.3: 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

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

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.
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.
20
Model FT1
INSTALLATION
Installation