Onicon Fox Thermal FT4X User manual

106796
Rev D
Model FT4X
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 FT4X Manuals:
• Fox Thermal FT4X View™ Manual
All Fox Thermal Manuals and software available in English only.
2
Model FT4X
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 FT4X
TABLE OF CONTENTS
Table Of Contents
1. Introduction Page 4
a. Quick Start Guide Page 4
b. Menu Trees Page 6
c. General Page 15
2. Installation (Mechanical) Page 18
a. Lateral Placement Page 19
b. Welding Branch Outlet Page 21
c. Installation Depth Page 22
d. Orientation Page 23
e. Mounting Instructions Page 25
f. Retractor Installation Page 26
3. Wiring (Electrical) Page 30
a. Wiring Access Page 30
b. Input Power Page 32
c. Signal Wiring and HART Communication Option Page 33
d. Pulse/Alarm Wiring (optional feature) Page 36
e. RS485 Wiring Page 38
f. HART Handheld Wiring Page 39
g. Remote Wiring Page 40
4. Operation (Standard Operation) Page 42
a. Start Up Page 42
b. Programming Page 44
c. CAL-V™ Page 65
d. Gas-SelectX®Page 68
e. Data Logger Page 72
5. Communication Protocols Page 79
a. Modbus RTU (RS485) Page 80
b. HART with DDL Page 91
6. Maintenance Page 98
a. Safe Removal of Meter from Retractor Page 99
b. Troubleshooting Page 104
7. Appendices Page 108
 Page 108
b. Agency Approvals Page 111
c. Dimensions Page 112
d. Warranty Page 123
e. Returning your meter Page 124
 Page 126
9. Index Page 127

1. Record inside diameter (ID). Ensure the actual
pipe ID matches the pipe ID shown on the

match, refer to p59.
2. Record up/downstream straight-pipe
requirements based on Pipe ID and meter
style (insertion or inline). [refer to p. 19]
3. a. The Flow Direction Indicator must point in

b. The housing can be rotated 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. 23]
4. Ensure correct probe depth setting. If using 1
½" size pipe, please see note on p. 22.
5. Open the housing. If needed, the orientation
of display can be rotated in 90° increments for
a better view.
[refer to p. 24 for more information]
6. Ensure power wiring [p. 32] and 4-20mA
wiring [p. 33 - p. 34] properly connected.
[refer to Wiring section p. 30 for more
information]
7. Ensure remote wiring is correct if remote
option ordered.
[refer to p. 40 - p. 41 for more
information]
8. Verify you have the proper output signal
wiring
[refer to p. 33 - p. 39 for more
information]
9. 
10. 
front panel of the display or by using the FT4X View™ software tool. Record the settings in the
spaces given for items A - F on the following page.
Use the table 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 OUTER
DIAMETER
FLOW
4X = INLINE
10X = INSERTION
8X = INLINE
15X = INSERTION
PIPE ID MIN.
INDICATOR:
- POINT IN DIRECTION
OF FLOW
- LOOSEN SET SCREWS TO
ROTATE HOUSING ±90º, ±180º
- TIGHTEN SET SCREWS
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°
3 PULSE (+)
4 PULSE (-)
7 COMMON
6 Tx/Rx (-)
5 Tx/Rx (+)
2 SWITCH INPUT (-)
1 SWITCH INPUT (+)
POWER (+) 1
POWER (-) 2
4-20mA #1 (+) 3
4-20mA #1 (-) 4
4-20mA #2 (+) 5
4-20mA #2 (-) 6
TS2
TS1
F1
J1
USB
0.75A
W1
TERMINATION
TP1
TP2
EARTH GROUND
+12 TO 28VDC
12 TO 28VDC RETURN
#4
#6
#3
#5
#2
Cable Shield
Electronics Enclosure
RED WHT
BLU YEL
Probe Sensor Wired By Fox
SENSOR
Remote Enclosure
#7
#8
#1
Splice
Green Wire
Shield Wire (insulate)
F1 F2 F3 F4
Initializing...
3 PULSE (+)
4 PULSE (-)
7 COMMON
6 Tx/Rx (-)
5 Tx/Rx (+)
2 SWITCH INPUT (-)
1 SWITCH INPUT (+)
POWER (+) 1
POWER (-) 2
4-20mA #1 (+) 3
4-20mA #1 (-) 4
4-20mA #2 (+) 5
4-20mA #2 (-) 6
TS2
TS1
F1
J1
USB
0.75A
W1
TERMINATION
TP1
TP2
FT4XCUSTOMER PLC OR DCS
+12 TO 28VDC
PULSE OR ALARM OUTPUT
12 TO 28VDC RETURN
+
-
2.4K OHM TYPICAL WITH 24VDC POWER
1.2K OHM TYPICAL WITH 24VDC POWER
4
Model FT4X
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. 
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 remote wiring
setup (if ordered)
8. Verify proper input/output
wiring setup
After powering on your meter, check items A - F below by accessing the meter settings either through
the front panel of the meter's display or by using the FT4X View™ software tool.
A. 
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 same as "Pipe_id="
D. Verify the 1st 4mA and
20mA meter settings
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
E. Verify the 2nd 4mA and
20mA meter settings
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
4mA =
20mA =
F. 
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
Thermal Service Department at 831-384-4300 to review this information. 5
Model FT4X
INTRODUCTION
Quick Start Guide

MAINMENU
I/OFLODSPEXIT
Comm=Modbus
NXTOK
None
Modbus
Hart
mA=Temp
NXTOK
20mACnt=3265
CHGOK
4mACnt=367
CHGOK
20mA=200°F
CHGOK
4mA=10°F
CHGOK
Temp
Flow
AnalogOutputs
Baud=9600
NXTOK
Parity=NONE
NXTOK
Address=02
CHGOK
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use
NXTOK
Notuse
3.6mA
21mA
Communication
Level2
only
I/OMENU
I/OCOM420EXIT
Comm=Hart
OK
Address=0
CHGOK
0‐63
Modbus
Only
HART
Only
SET4‐20mA
CH1CH2EXIT
20mACnt=3265
CHGOK
4mACnt=367
CHGOK
20mA=2345.6SCFM
CHGOK
4mA=0SCFM
CHGOK
mAFault=Notuse
NXTOK
Notuse
3.6mA
21mA
Level2
only
Display Menu, p. 10
Flow Menu 1, p. 8
Digital Output Menu, p. 7
6
Model FT4X
DISCLAIMER
6
INTRODUCTION
Introduction
Fig. 1.1: FT4X Menu Tree - Main Menu

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=HiTempAlm
NXTOK
OUT=LoTempAlm
NXTOK
SetI/O
OUTINPEXIT
Alarmoutput
MAINMENU
I/OFLODSPEXIT
Inp=NotUsed
NXTOK
Notused
TotReset
I/OMENU
I/OCOM420EXIT
(See Flow Menu 2, p. 9, for more alarm
settings)
iNOTE! A value of 0 disables the
alarms
7
Model FT4X
INTRODUCTION
Introduction
Fig. 1.2: FT4X Menu Tree - Digital Outputs and Input

FLOWMENU1
DGNUNTFM2EXIT
DIAGNOSTIC
SIMCAL‐V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
SCFD
MCFD
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
SimulateFlow?
YESNO
SimulateTemp?
YESNO
MAINMENU
I/OFLODSPEXIT
Flow Menu 2 Menu, p. 9
CAL-V™ Menu, p. 11
8
Model FT4X
DISCLAIMER
8
INTRODUCTION
Introduction
Fig. 1.3: FT4X Menu Tree - Flow Menu 1

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°F
CHGOK
LoTmpAlm=0°F
CHGOK
Level2
RESTOREDATABASE?
YESNO
MAINMENU
I/OFLODSPEXIT
FLOWMENU1
DGNUNTFM2EXIT
 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FT4XView.
 Ifthedigitaloutputisassignedtoanalarm,changingthevalue
herewillchangethatsetting.
 Avalueof0disablesthealarm.
Gas-SelectX
®
Menu, p. 12
9
Model FT4X
INTRODUCTION
Introduction
Fig. 1.4: FT4X Menu Tree - Flow Menu 2

DISP/TIME/PSW
DSPLOG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
24Hourlog=On
NXTOK
On
Off
Date/TimeReview
NXT
10/12/1710:33
CHGOK
YearSet=17
CHGOK
MonthSet=10
CHGOK
DaySet=12
CHGOK
HourSet=12
CHGOK
MinSet=51
CHGOK
SecSet=0
CHGOK
SetDate/Time?
YESNO
Contrtime=12:59
CHGOK
ContrHour=12
CHGOK
ContrMin=59
CHGOK
SetContrTime?
YESNO
Contracttimefor
24hourtotal
i
10
Model FT4X
DISCLAIMER
10
INTRODUCTION
Introduction
Fig. 1.5: FT4X Menu Tree - Display Menu
NOTE! All readings updated every second
• Flo Rate = Flow rate of process gas
• 
• 
• Temp = Temperature of process gas
• 

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number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
Flo:HoldValue
NXTEXITOK
HoldValue
Gotozero
TakeControl
off‐lineEXITOK
CAL‐VFail
Greaterthan±1.0
CAL‐VPass
Lessthan±0.80
CAL‐VWarning
Between±0.80to±1.0
Choosing“HoldValue”will
retainthelastflowvaluewhile
testisbeingperformed.
11
Model FT4X
INTRODUCTION
Introduction
Fig. 1.6: FT4X Menu Tree - CAL-V™ Menu

FLOWMENU2
GASPRMEXIT
Hydrogen=0%
CHGOK
GAS=Mix
NXTOK
PureGas
Mix
O&GMix
Propane=0%
CHGOK
Err:Mix=96%
CHG
CO2=25.5%
CHGOK
Showsonlyifgasmix
doesnotequal100.0%.
Helium=0%
CHGOK
Argon=0%
CHGOK
MAINMENU
I/OFLODSPEXIT
FLOWMENU1
DGNUNTFM2EXIT
GasMix100%
CHGOK
Methane=65.5%
CHGOK
Oxygen=0%
CHGOK
Butane=0%
CHGOK
Nitrogen=5%
CHGOK
Showsonlyifnoerroris
detected.PressingOK
allowsexittomenu.
Besuremixture
equals100%.
OR
Air=0%
CHGOK
GAS=O&GMix
NXTOK
Pentanes=0%
CHGOK
GAS=O&GMix
NXTOK
Heptanes=0%
CHGOK
O&GMix100%
CHGOK
Ethane=0%
CHGOK
Showsonlyifgasmix
doesnotequal100.0%.
i‐Butane=0%
CHGOK
n‐Butane=0%
CHGOK
Err:Mix=99.9%
CHG
Methane=45.5%
CHGOK
Nonanes+=0%
CHGOK
Octanes=0%
CHGOK
Propane=54.4%
CHGOK
Showsonlyifnoerroris
detected.PressingOK
allowsexittomenu.
OR
Hexanes=0%
CHGOK
CO2=0%
CHGOK
Nitrogen=0%
CHGOK
Nonanes+=Totalofall
gasesC9andgreater.
Methane
CO2
Nitrogen
Air
NaturalGas
Argon
Propane
Helium
Oxygen
Butane
Hydrogen
GAS=Methane
NXTOK
Ethane=0%
CHGOK
PureGas
12
Model FT4X
DISCLAIMER
12
INTRODUCTION
Introduction
Fig. 1.7: FT4X Menu Tree - Gas-SelectX
®
Menu
The most recent list of available
gases can be found on the Fox
Thermal website:
www.foxthermal.com/products/ft4x.php#gasSelectX

i
Log Menu 2, p. 14
13
Model FT4X
INTRODUCTION
Introduction
3124.6SCFM
csv=0.3432Volt
EnterLogMenu: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
Alarm=None
FT4XV5.3
Display16
Display17
MB_Sn=P23949
BB_Sn=P23945
Display18
MTR_Sn=123456
SNS_Sn=234567
Display19
TmpHi=0.0°F
TmpLo=0.0°F
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
PwrOff=48.0
LOGMENU1
LOGTOTENGEXIT
Day1=0SCF
NXTPRVEXIT
Day40=0SCF
NXTPRVEXIT
4024‐hourtotalslisted
PressF1tonavigateup
PressF2tonavigatedown
PressF4toreturntonormalmode
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
Elapsedtimeofmeterpoweroffinhours
ResetTotal?
NOYES
ResettingTotal

Fig. 1.8: FT4X Menu Tree - Log Menu 1
NOTE!
• All values in Log Menu 1 are view only. These values cannot
be changed from this menu
3124.6SCFM
csv=0.3432Volt
EnterLogMenu: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
Alarm=None
FT4XV5.3
Display16
Display17
MB_Sn=P23949
BB_Sn=P23945
Display18
MTR_Sn=123456
SNS_Sn=234567
Display19
TmpHi=0.0°F
TmpLo=0.0°F
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
PwrOff=48.0
LOGMENU1
LOGTOTENGEXIT
Day1=0SCF
NXTPRVEXIT
Day40=0SCF
NXTPRVEXIT
4024‐hourtotalslisted
PressF1tonavigateup
PressF2tonavigatedown
PressF4toreturntonormalmode
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
Elapsedtimeofmeterpoweroffinhours
ResetTotal?
NOYES
ResettingTotal

Fig. 1.9: FT4X Menu Tree - Reset Flow Total

14
Model FT4X
DISCLAIMER
14
INTRODUCTION
Introduction
Enter: Press F1 & F2 at the same me
Press F4 to return to normal mode
F3 & F4 pressed at the same me will
iniate a "Total" reset
LOGS MENU 1
LOG TOT ENG EXIT
LOGS MENU 2
GAS CFG VAL EXIT
GAS=O&G Mix
OK
Pentanes% = 0.0
NXT PRV EXIT
Heptanes% = 0.0
NXT PRV EXIT
Ethane% = 0.0
NXT PRV EXIT
i-Butane% = 0.0
NXT PRV EXIT
n-Butane% = 0.0
NXT PRV EXIT
Methane% = 45.0
NXT PRV EXIT
Nonanes+% = 0.0
NXT PRV EXIT
Octanes% = 0.0
NXT PRV EXIT
Propane% = 55.0
NXT PRV EXIT
Hexanes% = 0.0
NXT PRV EXIT
CO2% = 0.0
NXT PRV EXIT
Nitrogen% = 0.0
NXT PRV EXIT
1307.14 BTU/Ft3
NXT PRV EXIT
DNS=0.982 Kg/M3
PRV EXIT
Flow: SCFM
NXT PRV EXIT
Temp: °F
NXT PRV EXIT
Ref Press: Psia
NXT PRV EXIT
Ch1: Flow
NXT PRV EXIT
20 Ma=706.29
NXT PRV EXIT
4 Ma=0.00
NXT PRV EXIT
FloHi=0.00 SCFM
NXT PRV EXIT
FloLo=0.00 SCFM
NXT PRV EXIT
TmpHi=0.0 °F
NXT PRV EXIT
TmpLo=0.0 °F
NXT PRV EXIT
RefP=14.73 psia
NXT PRV EXIT
RefT=60.00 °F
NXT PRV EXIT
Kfact=0.0%
NXT PRV EXIT
Cutoff=12.5 SCFM
NXT PRV EXIT
PipeID=4.03 In
NXT PRV EXIT
Flt=0.80 Sec
NXT PRV EXIT
MTR_Sn=123456
NXT PRV EXIT
FT4X V6.0
NXT PRV EXIT
Release: 11_30_17
PRV EXIT
CAL-V=0.1
NXT PRV EXIT
CAL-V=Pass
NXT PRV EXIT
P CAL-V=-0.14
NXT PRV EXIT
P CAL-V=Pass
PRV EXIT
Press NXT (F1) to navigate down
Press PRV (F2) to navigate back up
GAS=Mix
OK
Methane% = 45.0
NXT PRV EXIT
CO2% = 0.0
NXT PRV EXIT
Nitrogen% = 0.0
NXT PRV EXIT
Helium% = 0.0
NXT PRV EXIT
Argon% = 0.0
NXT PRV EXIT
Hydrogen% = 0.0
NXT PRV EXIT
Air% = 0.0
NXT PRV EXIT
Propane% = 55.0
NXT PRV EXIT
Butane% = 0.0
NXT PRV EXIT
Oxygen% = 0.0
NXT PRV EXIT
Air
Argon
Butane
CO2
Methane
Natural Gas
Nitrogen
Oxygen
Helium
Hydrogen
Propane
1972.4 BTU/Ft3
NXT PRV EXIT
DNS=1.4223 Kg/M3
PRV EXIT
1014.1 BTU/Ft3
NXT PRV EXIT
DNS=0.6800 Kg/M3
PRV EXIT
Methane 100%
OK
Ethane% = 0.0
NXT PRV EXIT
Pure Gas
Fig. 1.10: FT4X Menu Tree - Log Menu 2

Welcome
Thank you for purchasing the Model FT4X Thermal Gas Mass Flow Meter from Fox Thermal.


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,

Theory of Operation
The Model FT4X 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.
Calibration Validation

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

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 process conditions.
Flow Calibration



customer application, the meter is ready to use. The Fox Thermal Calibration Lab maintains
15
Model FT4X
INTRODUCTION
Introduction


conditions, customer gas, line size and other information. All NIST-traceable equipment


DDC-Sensor™Technology Description
The Fox Thermal DDC-Sensor™, a Direct Digitally Controlled sensor, is a state of the art

traditional analog circuitry, the DDC-Sensor™ is interfaced directly to the FT4X microprocessor
for more speed and programmability. The DDC-Sensor™ quickly and accurately responds


Fox Thermal's DDC-Sensor™provides a technology platform for calculating accurate gas
correlations. The FT4X 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 FT4X with its DDC-Sensor™, state-of-the-art correlation
algorithms, and advanced Data Logger provide an accurate, multi-gas-capable thermal gas

I/O Description
The FT4X features two galvanically isolated 4-20mA analog outputs, HART communication, a
pulse output, switch input and Modbus RTU (RS485). There is also a USB port for interfacing


scaled by the user. The pulse output can be used for pulse or alarm and is programmable to

time.
FT4X View™ interfaces to the USB port and is a free Fox Thermal PC-based software program

available for download on the Fox Thermal website.
FT4X Data Logger


The FT4X Data Logger supports 40 daily total records. The meter is shipped with this function

of samples exceeds 40, the old data will be overwritten. Only the most recent 40 records are
kept and day #1 is always the latest total recorded.

functionality per API MPMS 21.1 Chapter 5.2 (linear type meters). Refer to the FT4X View™
16
Model FT4X
DISCLAIMER
16
INTRODUCTION
Introduction

Standard I/O
4 to 20 mA Flow
4 to 20 mA Flow or Temperature
Switch Input
USB
(Free FT4X View Software)
Outputs and Communications are
Galvanically Isolated
Standard Digital Communications
RS485 Modbus RTU
Optional Digital Communications
12-28VDC Input
Power
Standard Display and
Configuration Panel
Pulse or Alarm
F1 F2 F3 F4
HART Communication
Software Manual for data downloading instructions. Data that can be downloaded through
FT4X View™includes hourly and daily averages and totals. This data is saved for seven years as
required by API 21.1.
FT4X Functional Diagram

time, process gas temperature, and alarms. The display is also used in conjunction with the


diagnostics, communication parameters, data logging, and alarm limits.
Fig. 1.11: FT4X Function Diagram
Specic Conditions of Use:
• 

joints is necessary.
• Follow the manufacturer's instructions to reduce the potential of an
electrostatic charging hazard.
17
Model FT4X
INTRODUCTION
Introduction

Installation Scope
This section describes how to install the Fox Thermal Model FT4X Flow Meter:
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. Changing the display orientation.
4. 
Installation procedures must be performed using a combination of the end user’s
best engineering practices, in compliance with local codes, and with manufacturer’s
recommendations.
General Precautions
The following general precautions should be observed:
1. 
enclosure.
2. 
application.
3. 
installation.
4. Mounting FT4X 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 FT4X 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. 

unwanted probe movement or ejection of the probe from the pipe. For all
applications above 60 psig, the standard stainless steel ferrule is required.
Installation
18
Model FT4X
DISCLAIMER
18
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
i
Instructions for Flow Meter Lateral Placement


your meter type.
Fig. 2.1: Upstream and Downstream Pipe IDs for Insertion and Inline Flow Meters
NOTE!
• Pipe ID = Inside Diameter
• The probe diameter is ¾"
• 
Installation
19
Model FT4X
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
Fox Thermal recommends 180°
installation if the gas may have moisture or condensationif the gas may have moisture or condensation, if possible. Contact Fox for furtherContact 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 FT4X can also be installed at other angles.
Please note that the display and the enclosure orientation can be rotated in 90° increments.display and the enclosure orientation can be rotated in 90° increments.
Fig. 2.3: Alternate Installation at 90° (CCW)
20
Model FT4X
INSTALLATION
Installation