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Fox Thermal FT3 Instruction Manual

Thermal mass flow meter & temperature transmitter
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Fox Thermal
THERMAL MASS FLOW METER
& TEMPERATURE TRANSMITTER
Model FT3
www.foxthermal.com | 399 Reservation Road Marina, CA. 93933
104488
Rev. G

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Summary of Contents for Fox Thermal FT3

  • Page 1 Fox Thermal THERMAL MASS FLOW METER & TEMPERATURE TRANSMITTER Model FT3 www.foxthermal.com | 399 Reservation Road Marina, CA. 93933 104488 Rev. G...
  • Page 2 Please note that Fox Thermal reserves the right to change and/or improve the product design and specification without notice.

  • Page 3: Table Of Contents

    6. Dimensions Page 70 7. Appendices Page 78 a. Specifications Page 78 b. Agency Approvals Page 80 c. FT3 with 2 Gas Curves Page 82 d. Installation Variations Page 86 e. Returning your meter Page 88 8. Warranty Page 89 9.

  • Page 4: Introduction

    Therefore a device measuring mass flow is independent of temperature and pressure. The Model FT3 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.
  • Page 5 FT3 Optional Display and Configuration Panel The configuration panel allows the user to change a variety of settings in the FT3. The display is 2 lines x 16 characters with 4 mechanical and 4 IR (infrared) buttons. The IR and mechanical (push) buttons perform the same function but the IR buttons can be used without opening the cover.
  • Page 6 4-20mA scaling, pulse output frequency scaling, pipe area, zero flow cutoff, flow filtering or damping, display configurations, diagnostics and alarm limits. Fig. 1.2: FT3 Functional Diagram Standard I/O 24VDC Input Power...
  • Page 7 Model FT3 Introduction Scope This section describes how to install the Fox Thermal Model FT3 Flow Meter and how to get started. Installation methods will vary according to the flow meter type (insertion or inline). For Insertion Types: 1. Determine lateral position on the pipe 2.

  • Page 8: Installation (Mechanical)

    Instructions for Insertion Flow Meter Lateral Placement Install the Model FT3 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 recommended.
  • Page 9 Model FT3 Installation 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 0.87" past the center line of the pipe.
  • Page 10 Model FT3 Installation Fig. 2.3: Orientation of Insertion Type Flow Meter Flow Direction Arrow Pipe FLOW NOTE! Some flow meters are shipped with the sensor elements that are offset (see figure 2.4). Others are shipped with sensors that have equal length elements (see figure 2.5).
  • Page 11 Insertion Mounting Instructions - Compression Fittings The Model FT3 is mounted through a ¾" hole and a ¾" female NPT half coupling provided in the customer's pipe. Insertion style flow meters are not designed for use in pipes smaller than 1½".
  • Page 12 Instructions for Inline Flow Meter Placement Install the Model FT3 Inline 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. Eight diameters of straight pipe upstream and four downstream are recommended (for ¼"...
  • Page 13 The compression fitting has been placed according to the proper depth in the flow body by Fox Thermal factory technicians. After the flow body has been correctly fitted to the process pipe, the compression fitting may need to be tightened correctly (see figure 2.6 on p. 11).

  • Page 14: Wiring (Electrical)

    Wiring Wiring Instructions Wire the FT3 by opening the rear enclosure cover, bringing customer supplied wires in through the conduit openings and connecting to the terminal blocks. The FT3 has two conduit openings to maintain separation between AC input power and output signal wiring. To eliminate the possibility of noise interference, use a separate conduit for AC power and cut all wires short for a minimum service loop.

  • Page 15: Input Power

    Installation wiring: Obtain the correct length for the FT3 power and Installation wiring: Obtain the correct length for the FT3 power and...
  • Page 16 Model FT3 Wiring Power Input Requirements: 24VDC Supply External DC power supply must provide 24VDC ± 10%, at 0.7 Amps minimum. The enclosure must be properly grounded with a quality earth ground. Sixteen (16) gauge, stranded wire, is recommended for power and earth ground.
  • Page 17 Wiring Power Input Requirements: 100 to 240VAC Supply If the FT3 has the AC power supply option, the AC power must provide 100 to 240VAC -15% / +10% (85 to 264VAC) at 0.2 Amps minimum. The enclosure must be properly grounded with a quality earth ground. Sixteen (16) gauge, stranded wire, is recommended.
  • Page 18 NOTE! NOTE! The load resistor on the Fox Thermal Flow Meter 4-20mA signal is The load resistor on the Fox Thermal Flow Meter 4-20mA signal is typically 250 ohms and is located in or at the customers PLC or DCS. A typically 250 ohms and is located in or at the customers PLC or DCS.
  • Page 19 TS2 and TS4 as shown in the diagram below. CAUTION! When using the 4-20mA output to control equipment in a failsafe application, see the wiring configuration on p. 20. Fig. 3.5: 4-20mA Output Wiring for Loop Power Provided by FT3 Customer PLC or DCS Red 1...
  • Page 20 Wiring Setting Up the NE-43 Alarms The FT3 flow meter supports the NAMUR specification NE-43 for alarms on the 4-20 mA output. See p. 31 for the 4-20mA output NAMUR operation. CAUTION! Configure the FT3 with the following setup when using the 4-20mA output to control equipment in a failsafe application.
  • Page 21 24V, 0.75A NOTE! NOTE! The FT3 Frequency/Alarm output is typically used to drive digital circuitry The FT3 Frequency/Alarm output is typically used to drive digital circuitry or solid-state relays. The output of a solid state relay may, in turn, or solid-state relays. The output of a solid state relay may, in turn, operate loads such as electromechanical relays or alarm indicators.
  • Page 22 Model FT3 Wiring Fig. 3.8: Frequency/Alarm Output Local +24V Power Option Customer PLC or DCS Red 1 Red2 Yel 3 REMOTE 4-20 SENSOR Wh 4 FLOW Wh 5 2.4K to 10K OHM 4-20 PULSE Frequency or Alarm Output /ALM (-)2...

  • Page 23: Remote Switch

    NOTE! If you have purchased RS485 Modbus or HART communications NOTE! If you have purchased RS485 Modbus or HART communications options, please refer to one of the following appropriate Fox Thermal options, please refer to one of the following appropriate Fox Thermal...

  • Page 24: Remote Wiring

    Model FT3 Wiring Remote Wiring Remote wiring will be the same for both insertion and inline type FT3 flow meters. Fig. 3.10: Remote Wiring Signal Wiring 2X 3/4 " NPT, Female Input Power Remote Cable, 5 Conductor, Shielded, 100ft (30.48m) Max.
  • Page 25 Probe Sensor Wired By Fox SENSOR Remote Enclosure *Wire colors listed here represent the wire colors of cables supplied by Fox Thermal. Colors may vary if customer is supplying their own cable. Table 3.1: Remote Sensor Cable Wiring Electronics Enclosure...

  • Page 26: Operation (Standard Operation)

    FT3 Optional Display Panel & Configuration Panel The FT3 display is a 2 line x 16 character display with 4 mechanical and 4 IR (infrared) buttons. The IR and mechanical buttons perform the same function but the IR buttons can be used without opening the cover.
  • Page 27 Model FT3 Operation Fig. 4.2: FT3 Display Screen Navigation F1 key: Moves up one screen F2 key: Moves down one screen 1456.5 SCFM Display #1 123456 SCF (User programable screen) Enter “totalizer reset screen” when F3 & F4 are pressed at...
  • Page 28 FT3 Engineering Displays Pressing the F1 & F2 keys at the same time in the normal mode, brings up the engineering displays. These displays show internal parameters of the FT3 which are used by Fox Thermal service technicians. Press F4 to exit. Use the F1 & F2 keys to navigate.
  • Page 29 Model FT3 Operation Data Entry using the local display module There are 2 basic types of menu entries: one for changing value or string and one for selecting from a selection list. To Change a Value or String : VALUE = 0.91234 Press CHG (F1) key to change the value, OK (F4) to accept the value.
  • Page 30 Model FT3 Operation Enter the correct password, then follow the instructions for changing a value as specified above. The default Level 1 password is “1234”. If the wrong password is entered, the message “Wrong Password” will be displayed for a few seconds and then returns to the programming entry screen.
  • Page 31 Model FT3 Operation Then the following screen will display: 4 mA = 0 SCFM Enter the value for the 4mA and press OK (F4). NOTE! 4mA is normally set to 0. The following menu item allows the user to select an alarm level on the 4-20mA output when a serious issue is detected that is preventing the calculation of a correct flow value.
  • Page 32 Model FT3 Operation Press (F4) repeatedly until “Normal Mode” is seen briefly to exit the programming mode. Select CH2 (F2) to program channel 2. Channel 2 is programmable for flow (CH2=Flow)or temperature (CH2=Temp). CH2= Temp Press NXT (F1) to select Flow or Temperature and then press OK (F4).
  • Page 33 Model FT3 Operation The frequency output can be configured in one of three ways: (1) specifying a maximum frequency to a defined maximum value of flow rate, (2) specifying how many flow units total per pulse, U/P (i.e., 0.1 SCF per pulse) or (3) specifying how many pulses per unit, P/U (i.e., 10 pulses per SCF).
  • Page 34 MaxFlo=4999.8 SCFM NOTE! If the flow rate exceeds the maximum pulse rate (frequency), the output will stay at 100 Hz and the FT3 will issue an alarm code. Alarm Output To program the Alarm output, press I/O (F1) key from the "SET PARAMETERS" menu screen, then select I/O (F2) and the screen will show:.
  • Page 35 • Modbus NOTE! Any selection other than "Not Used" requires the communication option for the selected communication type. If enabling a communication option, see the associated Fox Thermal Communication Manual for specific programming information: FT3 Modbus Manual or FT3 HART Manual.
  • Page 36 Model FT3 Operation Display Setup There are four display screens that you can cycle through in normal operating mode (see Figure 4.2 on p. 27). Two of the four display screens are fixed and cannot be changed (displays #3 & 4). The other two screens are programmable to show the information that you prefer and are discussed in this section.
  • Page 37 The second password is used to allow access to calibration factors and should normally never be changed unless advised by the Fox Thermal service department, or to set a new password in the event that the user forgets the Level 1 password.
  • Page 38 Lbs/time or Kg/time. These values will be set at Fox Thermal, using the Application Data Sheet values. If the customer changes the application, these values can be changed to match the new application.
  • Page 39 WARNING! The FT3 re-calculates area, 4 and 20mA values, maximum flow for the frequency output and zero flow cutoff when changing flow units except for velocity units. When going to or from velocity units, the FT3 will not recalculate these values and these values must be re-entered manually.
  • Page 40 Model FT3 Operation Reference Temperature After pressing OK (F4) to accept the temperature unit setting, the display will prompt for temperature reference in selected unit. TempRef= 60°F Press CHG (F1) to change the reference and OK (F4) to accept. Pressure Unit...
  • Page 41 Model FT3 Operation NOTE! The density entry is only used when KG/time or LBS/time is selected for flow rate units. Density conditions are referenced to 0 C° at 760 mmHg. Flow Parameters This is the menu used to set various flow parameter values. They are: Flow cutoff, pipe area, filter, high and low alarm for flow and temperature.
  • Page 42 Model FT3 Operation Pipe Area Enter the pipe area in square meters or square feet and then press OK (F4). Use square meter for metric flow unit selection and square feet for English flow unit selection. A^2 = 0.05672 Ft^2 Filter Value The filter value is next.
  • Page 43 Model FT3 Operation High Flow Alarm HiFloAlm = 1234 SCFM This is the upper flow limit alarm value that can be associated with a Contact output. An alarm code is generated when the flow value exceeds this limit. If no checking is needed, this value should be set to zero.
  • Page 44 Model FT3 Operation Calibration Parameters This menu allows changing the factory calibrated setting of the flow meter and is accessible with a Level 2 password. Calibration parameter values are set for temperature and pressure at 0 degree C and 760 mmHg. These settings should normally never be changed except by Fox Thermal personnel at the factory.
  • Page 45 Data Logger with a Real Time Clock (RTC) option should be used to avoid this. Totalizer Rollover The FT3 has an automatic roll-over function. The total flow count of the FT2A will roll over after the following values: • Most flow units: 99,999,999,999 •...
  • Page 46 Operation Reset CRC If the NVRAM CRC check fails (Error Code 36), the programmed settings values will need to be verified and corrected before clearing the error. Call Fox Thermal Customer Service if you need assistance. RESET CRC? Press YES (F1) ONLY if you want to reset the CRC and generate a new CRC value.
  • Page 47 Model FT3 Operation Enter the value and then press OK (F4). NOTE! Enter zero to disable this feature. TmpSim = 0 C Enter the value and then press OK (F4). NOTE! Enter zero to disable this feature. CsvSim = 0 V Enter the value and then press OK (F4).
  • Page 48 Operation CAL-V™ - Calibration Validation Test 1 This menu allows the user to confirm the calibration of the FT3 by verifying the functionality of the sensor and sensor signal processing circuitry. During the CAL-V™ calibration validation test, the microprocessor adjusts current to the sensor elements and determines the resulting electrical characteristics.
  • Page 49 Model FT3 Operation To select what the flow output will do during a CAL-V™, choose from these options: • Go To Zero: Flow output will be zero during the test (i.e. 4mA) • Hold Value: Flow will hold last value during the test Select the option and press OK (F4).
  • Page 50 ("ZERO PIPE TEST") must be set before performing the test. • • See the Fox Thermal Calibration Validation User's Guide for details See the Fox Thermal Calibration Validation User's Guide for details on performing all diagnostic tests. on performing all diagnostic tests.
  • Page 51 Once process is stable, press YES (F4) key to begin the Zero CAL-CHECK®. Process Zero and Stable NOTE! NOTE! Refer to the Fox Thermal FT3 Calibration Validation User's Guide Refer to the Fox Thermal FT3 Calibration Validation User's Guide • • for information on setting the field baseline for Zero CAL-CHECK®...
  • Page 52 Model FT3 Operation Verifying ZRO Verifying ZRO Diff = xx.xx T=xx Sd = x.xe-xx T=xx This test will take less than 5 minutes. The T=xx is a count down timer indicating how much time is left to finish the test.
  • Page 53 Use buttons (F1) (F2) and (F3) to enter "1111" (up/down and next). Use buttons (F1) (F2) and (F3) to enter "0000" then press OK (F4). Turn OFF power to the FT3. Turn ON power to the FT3 while placing your finger on the (F1) IR key.
  • Page 54 Model FT3 Operation Fig. 4.5: FT3 Menu Tree - Main Menu Enter menu by scolling to display 4 and entering the password SET PARAMETERS I/O FLO DSP EXIT Display Menu, p. 58 Flow Parameters 1 Menu, p. 56 SET I/O...
  • Page 55 Model FT3 Operation Fig. 4.6: FT3 Menu Tree - Digital Output Not used OUT= Not used Frequency HiFloAlm NXT                            OK LoFloAlm HiTempAlm LoTempAlm Frequency System Alm Select 1 of  3  methods to scale  High Limit Alarm OUT= FREQUENCY the frequency  NXT                            OK output OUT= HiFloAlm NXT                            OK FREQUENCY OUTPUT P/U     U/P     FEQ    EXIT HiFloAlm=500 SCFM CHG                          OK PLS/UNT=2 UNT/PLS=0.5 MaxFreq=100Hz CHG                            OK CHG                            OK CHG                            OK Low Limit Alarm...
  • Page 56 Model FT3 Operation Fig. 4.7: FT3 Menu Tree - Parameter Menu 1 FLOW PARAMETER 1 Flow Parameter 2 Menu, p. 57 DGN UNT PRM EXIT DIAGNOSTIC FLO UNT=SCFM SIM TST EXIT TMP UNT=° F Deg F FloSim=0 SCFM TmpRef= 0 °F TmpSim=0 °...
  • Page 57 Model FT3 Operation Fig. 4.8: FT3 Menu Tree - Parameter Menu 2 FLOW PARAMETER 2 CAL SPC PRM EXIT Level 2 Level 1 Calibration Table Parameters Flow cutoff in selected units CAL TABLE K fact = 0% Cutoff=12.5 SCFM TB1 (TB2) (TB3) EXIT A2=0.0233...
  • Page 58 Model FT3 Operation Fig. 4.9: FT3 Menu Tree - Display Menu DISPLAY/PASSWORD PSW EXIT Display 1 Line 1 FLo rate Enabled DSP1L1=FLo rate IR KEY=Enabled PASSWD=1234 Total Disabled Elps Display 1 Temp Line 2 Alarm FLo rate DSP1L2=Temp Total Elps...
  • Page 59 Model FT3 Operation Fig. 4.10: FT3 Menu Tree - Diagnostic Tests Menu DIAGNOSTIC CALV ZRO EXIT ZERO CHK MENU Display alternates EXIT between the 2 PIP BTL EXIT screens until the Level 1 test is completed in about 4 Hold Value Flo:Go to zero minutes.
  • Page 60 DESCONECTADA ANTES DE INTENTAR EL ACCESO A LA ELECTRÓNICA. Si existe algún problema y no se encuentra ninguna conexión suelta, por favor póngase en contacto con el Servicio al Cliente de Fox Thermal para asistencia técnica al número (831) 384-4300.
  • Page 61 ATTENTION : S’ASSURER QUE L’ALIMENTATION DU COMPTEUR EST COUPEE AVANT D’ACCER AUX COMPOSANTS ELECTRONIQUES. En cas de problème et qu’aucune connexion lâche n’est détectée, veuillez contacter le service client de Fox Thermal pour obtenir une assistance technique au (831) 384-4300. Vorsichtsmaßnahmen ACHTUNG! BITTE ERGREIFEN SIE DIE ERFORDERLICHEN SICHERHEITSMAßNAHMEN, BEVOR SIE IRGENDWELCHE WARTUNGSARBEITEN...
  • Page 62 A new sensor will be installed and calibrated. Refer to "Returning Your Meter" on p. 88. Flow Calibration and Calibration Validation To ensure continued high accuracy of your Model FT3 Flow Meter, Fox Thermal provides a full NIST-traceable calibration. The Model FT3 also features on-board calibration validation diagnostics called CAL-V™...
  • Page 63 Thermal are calibrated as a single precision mass flow meter. Interchanging sensors or sensor wiring will impair the accuracy of the flow meter. If you experience any problem with your Model FT3 Flow meter, call Fox Thermal Customer Service Department, Technical Assistance at (831) 384-4300.

  • Page 64: Engineering Screens

    TS1 on main board. c)Bad Power supply •Check for correct power supply voltage at TS1 on main board. If fuse is OK and unit still won’t power up, call Fox Thermal for additional assistance Meter does not initialize Electromechanical •Check meter power cycles.

  • Page 65: Troubleshooting

    "Flow Parameters" on p. 2.Sensor dirty 2.Clean sensor (Refer to Maintenance section, p. 62) 3.Sensor broken 3.Return flow meter to Fox Thermal for repair (Refer to p. 88 for 4.Probe not mounted shipping instructions) securely 4.Remount probe (see Installation section, p.
  • Page 66 Refer to Figure 2.7 (p. 12). If not, change orientation of meter. • If you have a Fox Thermal insertion type flow meter, check that the insertion depth of the sensor/probe is correct. The end of the probe should be adjusted as per Figure 2.2 (p.
  • Page 67 It does not mean that the zero of the instrument is improperly set. The Fox Thermal sensor is extremely sensitive to gas flow and can even read the small flow caused by convection. If this is an unacceptable condition, please contact Fox Thermal Customer Service for alternatives.
  • Page 68 Sensor out of Refer to the ENGINEERING DISPLAY MENU on p. 28 of this range Manual and the Fox Thermal factory Calibration Certificate to check CSV voltage. Compare Display 10 value to Calibration Certificate CSV voltage and verify it's within range.
  • Page 69 Alarm Reason Action Code Sensor Bridge The FT3 probe is getting too hot in the FT3 electronic enclosure Shutdown and remote enclosure. Check sensor wiring. Database CRC Refer to the PARAMETER MENU 2 section on p. 41 of this Error Manual to reset CRC.

  • Page 70: Dimensions

    Model FT3 Dimensions Fig. 6.1 Local Insertion Meter with Retractor Dimensions (20.6) (11.7) (9.9) (16.5) 2X 3/4” NPT, FEMALE 10.75±.13 (27.3 ±.33) “LL” 0.87 (2.2) Table 6.1 Local Insertion Meter with Retractor Probe Size Probe Size Dimension “LL” [model code]...
  • Page 71 Model FT3 Dimensions Section 1 Section 1 Fig. 6.2 Remote Insertion Meter with Retractor Dimensions CONDUIT, 3/4”, METAL ø3.6 (ø9.1) REMOTE CABLE, 5 CONDUCTOR, (11.2) SHIELDED, 100ft (30.48m) MAX (20.6) (5.1) (11.7) (9.9) (15.0) (13.2) 2X 3/4” NPT, FEMALE 10.75±.13 (27.3 ±.33)
  • Page 72 Model FT3 Dimensions Fig. 6.3 Insertion Meter Dimensions (20.6) (11.7) (10.9) Input Signal Power Wiring 2x 3/4 inch NPT Female (13.2) “HH” “LL” FLOW Table 6.3 Insertion Meter with 316 stainless steel probe Probe Size Probe Size Dimension “LL” Dimension "HH"...
  • Page 73 Model FT3 Dimensions Fig 6.4: Insertion Remote Meter Dimensions (9.1) (11.2) (5.1) (11.7) Input Power (11.4) 2x 3/4 inch Remote Cable, 5 Conductor, NPT Female (13.2) Shielded, 100ft (30.48m) Max. “HH” “LL” FLOW Table 6.4 Insertion Remote Meter with 316 stainless steel probe...
  • Page 74 Model FT3 Dimensions Fig. 6.5: Inline Meter with 316 Stainless Steel Flow Body and NPT End Connections Dimensions (20.6) (11.7) (10.9) Input Signal Power Wiring 2x 3/4 inch NPT Female (13.2) “H” 2x NPT Male Thread “L” Table 6.5 Inline Meter with 316 stainless steel flow body and NPT End Connections...
  • Page 75 Model FT3 Dimensions Fig. 6.6: Inline Remote Meter with 316 Stainless Steel Flow Body and NPT End Connections Dimensions (9.1) (11.2) (5.1) (11.7) Input Power (11.4) Remote Cable, 5 Conductor, Shielded, 100FT Max. (13.2) “HH” 2x NPT Male Thread “L”...
  • Page 76 Model FT3 Dimensions Fig. 6.7: Inline Meter with 316 Stainless Steel Flow Body and 150lb RF Flange End Connections Dimensions (20.6) (10.9) (11.7) 2x 3/4 inch NPT Female (13.2) “H” “L” 2X Flange, Raised Face, ANSI B16.5, 316 SST Table 6.7 Inline Meter with 316 stainless steel flow body and 150lb RF Flange End Connections...
  • Page 77 Model FT3 Dimensions Fig. 6.8: Inline Remote Meter with Stainless Steel Flow Body and 150lb RF Flange End Connections Dimensions (9.1) (11.2) (5.1) (11.7) 2X 3/4 " NPT, (11.4) Female Remote Cable, 5 Conductor, (13.2) Shielded, 100FT Max. “HH” “L”...

  • Page 78: Appendices

    Model FT3 Appendices Performance Specs Flow Accuracy: Inline Meter: ± 1% of reading ± 0.2 % of full scale. ¼" size: 6” (152 mm) of straight, unobstructed pipe upstream and downstream required. All other sizes: 8 diameters of straight, unobstructed pipe upstream and 4 downstream required.
  • Page 79 Model FT3 Appendices Full Scale Flow Ranges for In-Line Flow meters: NM 3 /hr Size SCFM 0.25" 0 - 7.5 0 - 11.8 0.5" 0 - 125 0 - 200 0.75" 0 - 220 0 - 350 1" 0 - 360 0 - 570 1.25"...

  • Page 80: Agency Approvals

    20mA max. Serial Communication: USB communication port is standard. The free PC-based software tool - FT3 View™ - provides complete configuration, remote process monitoring, and data logging functions. Optional serial communication: HART and RS485 Modbus.
  • Page 81 Model FT3 Appendices ATEX (FM12ATEX0034X): Approved II 2 G Ex db IIB+H2 (T6, T4, or T1*) Gb Ta = -20°C to 70°C; IP67 II 2 D Ex tb IIIC (T85°C, T135°C, or T450°C*) Db Ta = -20°C to 70°C; IP67 IECEx (IECEx FMG 12.0010X): Approved...

  • Page 82: Ft3 With 2 Gas Curves

    Model FT3 Appendices Scope: FT3 with 2 Gas Curves This section describes added features to the standard FT3 flow meter when using the 2 gas curves firmware option. FT3 2 Gas Curves The 2 Gas Curves firmware allows the use of two different calibration tables when running with different gases.
  • Page 83 Model FT3 Appendices 3) Programming Contact Input for Curve Switching: Enter the menu using steps outlined in "Contact Input Settings" section (p. 35) and select "Switch CRV". Please note that the flow meter needs to be programmed for 2 gas curves at the Fox factory before you can select this function.
  • Page 84 Model FT3 Appendices 5) Programming 4-20mA settings for Curve 1 and Curve 2: When the meter has been programmed for 2 gas curves, 2 sets of 4-20mA settings for flow rate are used. To program these settings: Go to the 4-20mA setting following the "Analog 4-20mA Settings" section.
  • Page 85 In the event of a power failure, the software will remember the last curve in use. Upon powering up again, the FT3 unit will continue to use that curve. Switching between gas curves will require a password unless the password is set to "0", which disables it.
  • Page 86 Model FT3 Appendices Tilt Installations These variations on installations help prevent moisture and condensation from forming on the sensor and disrupting accurate flow measurement. Fox Thermal recommends 180° installation, if possible. 90°, CW Tilt installation at Tilt Installation at 90°, CCW...
  • Page 87 Appendices Tilt Installation at 45° When restricted physical installation space exists, the FT3 can also be installed at a 45° angle. Please note that the display's orientation will remain aligned with the top of the meter. NOTE! Displays are rotatable only in 90° angle increments.

  • Page 88: Returning Your Meter

    7-10 days (not including shipping or peak production times). If you have already shipped your meter to Fox Thermal for servicing and would like to check the status of your meter, please fill out our online Service Order Status form located at www.

  • Page 89: Warranty

    The customer shall provide notice of any defect to Fox Thermal, within one week after the Customer’s discovery of such defect. The sole obligation and liability of Fox Thermal, under this warranty shall be repair or replace, at its option, without cost to the Customer, the defective product or part.
  • Page 90 Model FT3 Definitions Glossary of Terms and Definitions Alternating Current American Wire Gauge Bara Bar absolute Contact Calibration Change Communication Current Sense Voltage Direct Current Down Display Elapsed time Frequency Ft^2 Square Feet Input/Output Input Infrared (IR Buttons = optical switches)
  • Page 91 Model FT3 Definitions NM3/H Normal cubic Meter per Hour NM3/M Normal cubic Meter per Minute National Pipe Thread Unit Unit per Pulse Personal Computer Pulse per Unit PIP A^2 Pipe Area Programmable Logic Controller Parameters Pressure PSIA Pounds per Square Inch Absolute...

  • Page 92: Index

    Model FT3 Index Index Installation, Compression Fitting - Insertion, p. 11 Access to Electronics, p. 14 Compression Fitting - Inline, p. 13 Alarm Codes, p. 68 General Precautions, p. 8 Alarm wiring, p. 21 Lateral Placement - Inline, p. 12 Analog 4-20mA outputs, p.
  • Page 93 Model FT3 Index Programming (cont'd) Totalizer Rollover, p. 45 Changing values or strings, p. 29 Troubleshooting, p. 63 Contact Input, p. 35 Alarm Codes, p. 68 Display Setup, p. 36 Installation Problems, p. 66 Filter value, p. 42 Unequal length sensors, p. 11 Flow cutoff, p.
  • Page 94 Wiring Definition of Terms Troubleshooting Tips NOTE! is used for Notes and Information WARNING! is used to indicate a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION! is used to indicate a hazardous situation which, if not avoided, could result in minor or moderate injury.

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