Page 1 Fox Thermal Gas Mass Flow Meter Instruction Manual Document #104488 Rev J 831.384.4300 | 399 Reservation Rd, Marina, CA 93933 | foxthermal.com...
Page 3 Please note that Fox Thermal reserves the right to change and/or improve the product design and specification without notice.
Page 4: Table Of Contents
Model FT3 Table of Contents 1. Introduction p. 6-20 a. Quick Start Guide ............... . . p. 6 b.
Page 5 Model FT3 Table of Contents 6. Data Logger p. 106-111 a. Features ................p. 106 b.
Page 6: Introduction
Check the remaining flow meter settings by accessing the meter settings either through the front panel of the display or by using the FT3 View™ software tool. Record the settings in the spaces given for items A - E on the following page.
Page 7 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 FT3 View™ software tool. Which flow units have been set in meter? (SCFM, KG/H, etc..)
Page 8: Menu Trees
Model FT3 Introduction Fig. 1.1: FT3 Menu Tree - Main Menu Enter menu by scrolling to display 6 and entering the password SET PARAMETERS I/O FLO DSP EXIT Display Menu, p. 12 Flow Parameter Menu 1, p. 10 SET I/O...
Page 9 Model FT3 Introduction Fig. 1.2: FT3 Menu Tree - Digital Outputs and Input 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...
Page 10 Model FT3 Introduction Fig. 1.3: FT3 Menu Tree - Flow Parameter 1 FLOW PARAMETER 1 Flow Parameter 2 Menu, p. 11 DGN UNT PRM EXIT SCFM DIAGNOSTIC FLO UNT=SCFM SCFH SIM TST EXIT NM3/H NM3/M KG/H KG/M KG/S TMP UNT=° F...
Page 11 Model FT3 Introduction Fig. 1.4: FT3 Menu Tree - Flow Parameter 2 FLOW PARAMETER 2 CAL SPC PRM EXIT Level 2 Level 1 Calibration Table Parameters Flow cutoﬀ in selected unit CAL TABLE K fact = 0% Cutoﬀ=12.5 SCFM TB1 (TB2) (TB3) EXIT A2=0.0233...
Page 12 Model FT3 Introduction Fig. 1.5: 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 13 Model FT3 Introduction Fig. 1.6: FT3 Menu Tree - Diagnostic Tests Menu DIAGNOSTIC CALV ZRO EXIT Display alternates ZERO CHK MENU EXIT between the 2 PIP BTL EXIT screens until the test is completed Level 1 in about 4 Hold Value Flo:Go to zero minutes.
Page 14 Model FT3 Introduction Fig. 1.7: FT3 Menu Tree - Accessing Data Logger Functions from the Front Panel SET I/O INP OUT LOG EXIT Data log = ON Clear Log? Level 2 Level 1 DATA LOG DATA LOG CLR STR TIM EXIT...
Page 15 Model FT3 Introduction Fig. 1.8: Viewing Data Logger Records from the Front Panel Use the F2 key to move to Use the F4 key to exit the next record, to normal mode Use the F1 key to move F1 AND F4 keys pressed F1 AND F3 keys pressed back to the previous one.
Page 16 Model FT3 Introduction Fig. 1.9: FT3 Menu Tree - Engineering Displays Enter Log Menu: Press F1 & F2 at the same time 3124.6 SCFM Flow in selected unit Enter: Press F1 & F2 at the same time Press F4 to return to normal mode Display 10 Sensor voltage in volts csv=0.3432 Volt Press F4 to return to normal mode...
Page 17 Introduction Welcome Thank you for purchasing the model FT3 thermal gas mass flow meter from Fox Thermal. The FT3 is one of the most technically advanced flow meters in the world. Extensive engineering effort has been invested to deliver advanced features, accurate measurement performance and outstanding reliability.
Page 18 It can supply a 42mA maximum total load (do not use for other external devices). FT3 View™ interfaces to the USB port and is a free Fox Thermal PC-based software program available for download on the Fox Thermal website. FT3 View™ displays flow meter readings and permits flow meter configuration.
Page 19 The display is also used in conjunction with the Configuration Panel for field configuration of flow meter settings such as 4-20mA scaling, pulse output scaling, pipe area, zero flow cutoff, flow filtering or damping, display configurations, diagnostics, and alarm limits. Fig. 1.11: FT3 Function Diagram Standard I/O 24VDC Input Power...
Page 20: General
Model FT3 Installation Installation 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.
Page 21: Lateral Placement
Instructions for Flow Meter Lateral Placement Install the model FT3 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. See Fig. 2.1 below for your meter type.
Page 22 Fig. 2.2: Installation at 180° and 45° Alternate Installations - Vertical Pipes or Restricted Installation Spaces When restricted physical installation space exists, the FT3 can also be installed at other angles. Please note that the display and the enclosure orientation can be rotated in 90º increments.
Page 23: Welding Branch Outlet To Pipe (Insertion)
2. Assemble the compression fitting and branch fitting hand tight onto the probe of the FT3. 3. Insert the probe into the hole in the pipe and use the FT3 probe and compression fitting to align the branch fitting with the hole and the probe perpendicular to the pipe.
Page 24: Installation Depth
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 2.5, the end of the sensor window should be 0.87"...
Page 25: Orientation
Model FT3 Installation Direction of Flow and Orientation of the Probe Install the meter with the flow direction indicator pointing in the direction of flow and centered on the middle of the pipe. The rotational misalignment of the flow direction indicator must be less than 2 degrees.
Page 26 Model FT3 Installation Unequal Length Sensor Elements Install the shorter sensor element upstream from the longer one. Fig. 2.7: Unequal Length Sensor Elements +2° -2° FLOW FLOW Equal Length Sensor Elements Install flow meter with both sensor elements facing the flow stream within ±2˚.
Page 27: Mounting Instructions
Installation Mounting Instructions - Compression Fittings FT3 insertion style flow meters are mounted through a 0.531" (17/32") hole and a ¾" female NPT branch outlet in the customer's pipe. Insertion style flow meters are not designed for use in pipes smaller than 1½".
Page 28 Model FT3 Installation Mounting Instructions - Compression Fittings (Inline and Insertion Meters Previously Installed) In cases where a compression fitting has already been swaged in an inline flow body or an insertion meter, use the following procedure. • Carefully insert the probe with swaged ferrules into the fitting until the front ferrule seats against the fitting (see Fig.
Page 29: Retractor Installation
Model FT3 Installation Installation of a New Retractor Assembly 1. Remove meter probe from retractor assembly and leave the ball valve open. 2. Install the valve assembly on the pipe, by tightening the Hex Nipple with a 1-1/16" wrench. Fig. 2.11: Retractor Assembly Without Probe Installed NUT &...
Page 30 Model FT3 Installation 3. Carefully slide the probe through the retractor assembly and through the hole to see if there is interference by touching the pipe wall with the end of the probe on the far side or until the probe cannot go deeper.
Page 31 Model FT3 Installation 4. Using the equation (L + D/2 + 0.87") from Fig. 2.5, calculate the insertion depth and mark on the probe while measuring from the end of the probe. 5. The Retractor Clearance table of Fig. 2.13 lists the space required to remove the meter from the retractor.
Page 32 Model FT3 Installation 6. Insert probe back into the retractor to the depth mark and hand-tighten the compression fitting. 7. Verify that flow direction indicator is in line with pipe and in the direction of flow. Fig. 2.14: Installed Retractor...
Page 33: Wiring (Electrical)
Model FT3 Wiring Wiring Instructions To wire the FT3 connect the power and signal wires to the terminal blocks according to the label and instructions on the following pages. Fig. 3.1: FT3 Wiring Access Front Enclosure Cap Rear Enclosure Cap...
Page 34 • Connect earth ground to a chassis ground screw on the inside of FT3 enclosure. • An external power disconnect and 16A over-current protection are required for the AC and DC powered FT3.
Page 35 • Trim the wires to extend 2.5 inches out of the enclosure after the conduit and wires are routed to the FT3 (preferred method). • Trim the wires to extend 6 inches from the end of the conduit before it is attached to the FT3. Fig. 3.2: FT3 Wiring - Conduit Openings...
Page 36: Input Power
Model FT3 Wiring Power Input Requirements: 24VDC 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 37 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 38: Signal Wiring
Model FT3 Wiring 4-20mA Output Wiring: Customer-Supplied Power Source Bring the wiring in through the right hand conduit opening. Connect the 4-20mA flow rate and 4-20mA output #2 temperature or flow rate wiring 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.
Page 39 CAUTION! When using the 4-20mA output to control equipment in a failsafe application, see the wiring configuration on p. 40. Fig. 3.6: 4-20mA Output Wiring for Loop Power Provided by FT3 Customer PLC or DCS Red 1...
Page 40: Alarm Wiring
Wiring Setting Up the NE-43 Alarms The FT3 flow meter supports the NAMUR specification NE-43 for alarms on the 4-20mA output. See p. 55 for the 4-20mA ouput NAMUR operation. CAUTION! Configure the FT3 with the following setup when using the 4-20mA output to control equipment in a failsafe application.
Page 41 24VDC Return 24V, 0.75A NOTE! • The FT3 Pulse/Alarm output is typically used to drive digital circuitry or solid- state relays. The output of a solid state relay may, in turn, operate loads such as electromechanical relays or alarm indicators. •...
Page 42 This wiring option is only available with the isolated 24V output power option. • The FT3 Pulse/Alarm output is typically used to drive digital circuitry or solid- state relays. The output of a solid state relay may, in turn, operate loads such as electromechanical relays or alarm indicators.
Page 43: Remote Switch
Model FT3 Wiring Remote Switch Wiring A remote switch can be used to reset the Totalizer and elapsed time, if enabled in the programming settings. There is no polarity requirement on these connections. Use TS2, 7(+) and 8(-). When the 2 gas curve option is ordered, the switch can be used to switch between curves.
Page 44 Termination Resistor Connect a termination resistor across the receive/transmit signals of the last device on the RS485 communication line. To connect the 121 ohm termination resistor on the FT3, set JP1 to the TERM position. Disconnect the termination resistor on all other external RS485 devices. The termination resistor of the FT3 is disconnected by setting JP1 to the NC (Not Connected) position.
Page 45 The 4-20mA current loop and HART modem connections are made on the terminal block TS5 pin 1(+) and pin 2(-). Terminal block TS5 is located on the HART communication option board of the FT3. Fig. 3.12: HART 4-20mA Output Wiring, Customer-Supplied Power Source...
Page 46 (+) and pin 2 (-). Terminal block TS5 is located on the HART communication option board of the FT3. Isolated 24 volt output power is available on terminal block TS4 pins 1 (+) and 2 (-) of the HART option board. This output can be used to power the 4-20mA loop if an external supply is not available..
Page 47 Model FT3 Wiring HART 4-20mA Output Wiring: Handheld Communicator The 4-20mA current loop and HART modem connections are shown on p. 45 and p. 46. A handheld HART communicator can be connected to test points TP1 (+) and TP2 (-) with clip leads or to the 4-20mA terminal block.
Page 48: Remote Wiring
Model FT3 Wiring Remote Wiring Remote wiring is only necessary when the remote sensor option has been ordered. Fig. 3.15: Remote Wiring Signal Wiring 2X 3/4 " NPT, Female Input Power Remote Cable, 5 Conductor, Shielded, 100ft (30.48m) Max. Five wire shielded cable required. The shielded cable should be run through a separate grounded steel conduit (no other cables or wires in the conduit).
Page 49 Probe Sensor Wired By Fox SENSOR Remote Enclosure NOTE! 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 50: Operation (Standard Operation)
The meter can be programmed by using the optional display and configuration panel. The FT3 display is a 2 line x 16 character display with 4 mechanical buttons and 4 IR (infrared) keys. The mechanical buttons of the configuration panel can be accessed by removing the FT3 cap. Be sure to replace the cap after you are done configuring the FT3.
Page 51: Display Screens
Pressing the F1 and F2 keys at the same time enters the Log Menu and Engineering Menu screens. Pressing the F3 and F4 keys at the same time brings up the Reset Total screen prompt. Fig. 4.2: FT3 Measurement Mode Display Screen Navigation F1 key: Moves up one screen...
Page 52 Pressing the F1 and 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. Use the F1 and F2 keys to navigate. Press F4 to exit.
Page 53: Programming
Model FT3 Operation Programming: Data Entry using the Display and Configuration Panel 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...
Page 54 Model FT3 Operation If the wrong password is entered, the message “Wrong Password” will display and then return to the programming entry screen. SET PARAMETERS Menu (Main Menu) If the password is accepted, the SET PARAMETERS menu will be shown:...
Page 55 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...
Page 56 Model FT3 Operation To exit the programming mode, press (F4) repeatedly until Normal Mode is seen. 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 57 Model FT3 Operation The frequency output can be configured in once of three ways: 1. Specifying how many pulses per unit, P/U (i.e., 10 pulses per SCF) 2. Specifying how many flow units total per pulse, U/P (i.e., 0.1 SCF per pulse) 3.
Page 58 MaxFlo=5000 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. Then select I/O...
Page 59 Press EXIT (F4) repeatedly until you exit programming mode. FT3 with 2 Gas Curves This section describes added features to the standard FT3 flow meter when using the 2 gas curves firmware option. The 2 Gas Curves firmware allows the use of two different calibration tables when running with different gases.
Page 60 Model FT3 Operation Pressing F2 and F3 simultaneously: SWITCH TO CRV 1? Password needs to be entered if active (default: 1234): PASSWORD:_ After entering a valid password, a brief confirmation message will be displayed for 1 second: SWITCH TO CRV 1 Programming Contact Input for Curve Switching Enter the menu using steps outlined in "Contact Input Settings"...
Page 61 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 62 Model FT3 Operation 4mA = 0 4mA is the lower limit associated with curve 1. Change it as needed and press OK (F4). 20 maCv2=450 SCFM 20 maCv2 is the upper limit associated with curve 2. Change it as needed and press OK (F4).
Page 63 Model FT3 Operation Display Setup There are four display screens that you can cycle through in normal operating mode (see Fig. 4.2 on p. 51). Two of the four display screens are fixed and cannot be changed (Display 3 and Display 4).
Page 64 This menu is used to set the units for mass flow, temperature, and pressure as well as the setting of reference temperature and reference pressure. These values will be set at Fox Thermal using information supplied by the customer. These values can be changed to match a new application. The units setting is accessed from the SET PARAMETERS menu.
Page 65 WARNING! The FT3 re-calculates area, 4 and 20mA values, maximum flow for the pulse 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 66 Model FT3 Operation Temperature Units After pressing OK (F4) to accept the Flow unit the display will prompt for the temperature unit setting: TMP UNT= Deg F Press NXT (F1) to change selection and OK (F4) to accept. Selections for Temperature units are: Deg C or Deg F...
Page 67 Model FT3 Operation Accessing Flow Parameters and Alarm Settings The FLOW PARAMETER 1 menu is used to set various flow parameter values. They are: Flow cutoff, pipe diameter, filter, high and low alarm for flow and temperature. NOTE! The parameters in this menu are set to the customer specifications at the factory. They should only be changed when changing the application of the flow meter.
Page 68 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. A^2 = 0.05672 Ft^2 Filter Value The filter value is entered in seconds. The allowable time constant range is 0.8 to 10 seconds. The filter time interval is proportional to the dampening.
Page 69 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 FT3 View™. If the digital output is assigned to an alarm, changing the value here will change that setting.
Page 70 Model FT3 Operation Low Temperature Alarm This is the lower temperature limit alarm value that can be associated with the alarm output. An alarm code is generated when the temperature value is below this limit. If no alarm is needed, set this value to zero.
Page 71 Model FT3 Operation Pressing YES (F1) will show: FloSim = 0 SCFM Enter the value and then press OK (F4). NOTE! Enter zero to disable this feature. The screen will show: SIMULATE TEMP? Pressing YES (F1) will show: TmpSim = 0 C Enter the value and then press OK (F4).
Page 72 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 73 Model FT3 Operation Pressing the NXT (F3) key will show the data point voltage and then mass velocity and then go to the next data point. The number after Volt (i.e., Volt1) or Flo (i.e., Flo1) indicated the data point number.
Page 74 Press YES (F4) and enter password to reset total and elapsed time. Press NO (F1) to cancel. NOTE! This feature is not available on non-resettable units. Totalizer Rollover: The FT3 has an automatic roll-over function. The total flow count of the FT3 will roll over after 99,999,999,999. Except for: MSCFD:...
Page 75 Data within established tolerances confirms the meter is accurate. NOTE! If the CAL-V™ test is performed using the Fox Thermal FT3 View™ Software, at the completion of the test, a CAL-V™ Certificate may be printed for a record of the test. This certificate will display a pass/fail result.
Page 76 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). NOTE! The FT3 will stop measuring flow when performing this test. Take Control off-line EXIT Operation | 76...
Page 77 Remove the probe from the pipe, clean the sensor, and perform the test again under a normal or high flow rate. If a "Fail" result is displayed after repeating the test, please call Fox Thermal Service at (831) 384-4300 for assistance.
Page 78 Fox Thermal Retractor • The first in situ option is achieved through the use of a Fox Thermal retractor that may be ordered as an option for most inline- or insertion- type meters. The assembly allows the operator to retract and isolate the sensor from the process in order to conduct the Zero CAL- CHECK test.
Page 79 Using a Fox Thermal Retractor for Zero CAL-CHECK™ The following are the instructions for using a Fox Thermal retractor to set the field baseline for - or performing - an in situ Zero CAL-CHECK test. If you are not using a Fox Thermal retractor, move ™...
Page 80 Model FT3 Operation Fig. 4.6: FT3 and Parts of Fox Thermal Retractor Fig. 4.7: Close-Up: Fittings of Fox Thermal Low Pressure Retractor PAGE 10 COMPRESSION NUT, 7/8" WRENCH FITTING HEX, 7/8" WRENCH PAGE 10 Operation | 80...
Page 81 Model FT3 Operation To isolate the sensor, it must be retracted from the pipe. WARNING! SYSTEM MAY BE UNDER HIGH PRESSURE. Do not attempt to remove meters from a pipe pressurized above 60 psig without first relieving pressure in the pipe.
Page 82 Model FT3 Operation Fig. 4.9: Isolating the Sensor in Retractor Chamber Turn handle clockwise 90° to close valve Lift to unlock handle PROBE INSIDE RETRACTOR PAGE 12 After diagnostic procedure is complete, the probe must be reinserting into the pipe to begin monitoring flow again.
Page 83 (in the pipe) or using a Fox Thermal retractor, you must set the field baseline before performing the test. When the sensor is isolated in zero flow, the FT3 meter is ready to either perform the Zero CAL- CHECK test or set the field baseline for future tests.
Page 84 Model FT3 Operation ZERO CHK MENU EXIT Choose PIP (F1) for in situ Zero CAL-CHECK ™ ZERO PIPE TEST EXIT To set the field baseline, choose SET (F2). SET ZRO Ref? Choose YES (F1) to set the field baseline. Process Zero and...
Page 85 Model FT3 Operation At the conclusion of the set, the display will show: Ref=x.xxxx Press OK (F4) to return to the Zero CAL-CHECK™ menu. The meter may now perform Zero CAL-CHECK tests at the field baseline at any time. ™...
Page 86 Model FT3 Operation NOTE! For accurate readings and best test results: • Perform a visual inspection of sensor window for damage/deformity and condition of sensor elements before starting the test. • The meter must be used in the same pipe size, with the same gas mixture, and in the same process conditions for which the meter was originally calibrated in the factory.
Page 87 Model FT3 Operation Diff=x.xxx % Passed Upon test completion, the final percentage value will be displayed along with a Pass/Fail message. Performing the Zero CAL-CHECK - Out-of-pipe ™ Remove the meter from the pipe and isolate in an area that will allow the test to go undisturbed (see Note below).
Page 88 Model FT3 Operation Press BTL (F2) to choose to perform the test out of the pipe. The display will show: ZERO BTL TEST EXIT Press VER (F1) key to verify the Zero CAL-CHECK ™ VERIFY ZRO? Press YES (F1) key to verify the Zero CAL-CHECK ™...
Page 89 (F2), (F3) and (F4) keys. To check the calibration values of the IR keys, turn off power to the FT3, then turn on power to the FT3 while placing your finger on the (F1) IR key. The display will show the values (example here):...
Page 90: Communications
This portion of the manual describes the Modbus implementation using RS485 serial communication physical layer for the Fox Thermal FT3 mass flow meter based on the Modicon Modbus Protocol (PI- MBUS-300 Rev. J). A Modbus-enabled FT3 includes "MB" in the model number.
Page 91 Model FT3 Communications Read Multiple Registers (command 03) This command reads one or more 16-bit registers from the FT3 and has the following format: Request: <Meter Address> <Command code=03> <Register start address high> <Register start address low> <Register count high> <Register count low> <CRC high> <CRC low>...
Page 92 Model FT3 Communications Table 5.1: FT3 Modbus Holding (cont'd) Modbus Data Type Description Units Register 40020 32-bit float LSW Flow User selected 40021 32-bit float MSW 40022 32-bit float LSW Total User selected 40023 32-bit float MSW 40024 32-bit float LSW...
Page 93 Model FT3 Communications Table 5.1: FT3 Modbus Holding (cont'd) Modbus Data Type Description Units Register 40061 32-bit float LSW Zero Check Pipe Ref Zero Check Pipe Reference 40062 32-bit float MSW 40063 32-bit float LSW Zero Check Pipe Diff Zero Check Pipe Difference %...
Page 94 Model FT3 Communications Read Single Register (Command 04) This command is used to report the status information. Request: <Meter Address> <Command code=04> <Register address =0> <Register address =0> <Register count =0> <Register count =1> <CRC high> <CRC low> Response: <Meter Address> <Command code=04> <Byte count =2> <Status High><Status Low> <CRC high>...
Page 95 Model FT3 Communications Write Single Register (Command 06) This command is used to perform miscellaneous functions such as clearing the totalizer and initiating diagnostic operations. The register address is 0x0a (10 decimal, Modbus=40011) and the data to write is described below.
Page 96 Model FT3 Communications Zero Check In-Bottle Verify: Address=40011, data = 176 (0xB0) This command initiates a "Zero Check In-Bottle Verify". This operation does not affect flow calculations. The register 40069 may be monitored to check for completion. Switch to Curve #1: Address=40011, data = 170 (0xAA) This command initiates a command to switch to gas curve 1 when configured for 2 gas curves.
Page 97 Model FT3 Communications Example: Request: Request data register at starting address 40200 and specifying 9 register to read the complete record <0x01> <0x03> <0x00> <0xc7> <0x00> <0x09> <0x34> <0x31> Response: <0x01> <0x03> <0x12> <rec nb> <rec nb> <year><month><day><hour><min><sec><data index><data index><total val int><total val int><total val int><total val int><total val fp><total val fp><total val fp><total val fp><CRC high>...
Page 98 Model FT3 Communications Floating point data layout Each 32-bit floating point value uses two consecutive Modbus registers. The most significant byte of the lower numbered register holds the least significant byte of the significand. The least significant byte of the lower numbered register holds the next most significant byte of the significand. The most significant byte of the higher numbered register holds the sign bit and most significant 7 bits of the exponent.
Page 99: Modbus Communication Protocol And Parameters
Model FT3 Communications Modbus Parameters To program the communication parameters, start at the SET PARAMETERS menu: SET PARAMETERS EXIT Then press I/O (F1) to set Inputs/Outputs: SET I/O EXIT Then press COM (F1) to select communication parameters. Set Bus protocol for Modbus:...
Page 100 Model FT3 Communications Parity=EVEN Press NXT (F1) repeatedly until the correct selection is shown and then press OK (F4) to accept the setting. Selections are: NONE EVEN Address=02 Press CHG (F1) to change the address and then press OK (F4) to accept the setting.
Page 101: Hart
The Fox Thermal model FT3 transmitter complies with HART Protocol Revision 7.1. A HART-enabled FT3 includes "BH" in the model number. This section of the manual specifies all the device-specific features and documents HART Protocol implementation details (e.g., the Engineering Unit Codes supported).
Page 102 Channel 2 of the 4-20mA output may be configured for flow or temperature values when using HART. HART Indicators Green LED indicator LP3 cycles on and off to indicate that the FT3 is operating. Orange LED indicator LP2 blinks when HART signals are received and Yellow LP1 blinks when HART signals are transmitted.
Page 103 Model FT3 Communications NOTE! Power cycle is required for the new settings to take effect. Device Variables This device does not expose any Device Variables. Dynamic Variables Four Dynamic Variables are implemented. Variable Meaning Units Flow Rate In Selected Units...
Page 104 Model FT3 Communications Additional Device Status (Command 48) Command #48 returns 2 Device-Specific Status bytes of data, with the following status information: These bits are set when an alarm or error condition is present. The bit automatically clears when the condition returns to its normal state.
Page 105 Fixed current mode is implemented, using Command 40. This mode is cleared by power loss or reset. Damping Damping is standard, affecting only the PV and the loop current signal. Capability Checklist Manufacturer, model Fox Thermal Instruments, FT3 Device Type Transmitter HART revision Device Description available...
Page 106: Data Logger
Scope - Data Logger The model FT3 offers an option to have a data logger mounted on the Front Panel board that can be used to record FT3 data. A Data Logger-enabled FT3 includes "DL" in the model number. Data that may be recorded includes interval totals (i.e.
Page 107: Clearing The Data Log
Model FT3 Model FT3 Data Logger SET I/O EXIT NOTE! If the hardware does not detect a real time clock, the LOG menu key will not be displayed. Press F3 for (LOG). The screen will show: Data log = ON The default is set with the data logger enabled, press F1 (NXT) to turn the data logger ON or OFF (the default is ON).
Page 108: Setting The Start/Sync Time
Model FT3 Model FT3 Data Logger Setting the Start/Sync Time The start/sync time is used to start or syncing a data log sample. When a match is detected between the real time clock and the start/sync time, the interval is reloaded. The Data Logger will be set to the default of zero (midnight) and only the hour, minute, and second will be used for the trigger.
Page 109: Setting The Real Time Clock
Model FT3 Model FT3 Data Logger Press F1 (YES) to set the start/sync time for Day:Hour:Minute. NOTE! Make sure that the specified time has not been reached yet. Setting the Real Time Clock From the Data Log menu, press F3 (TIM). The screen will show:...
Page 110: Viewing The Real Time Clock
Press F1 (YES) to set the Date and Time. NOTE! All real time clocks on FT3 data loggers are set to a default of California's Pacific Standard Time. To sync the real time clock to your local time exactly, set the time slightly ahead of your local, current time and wait for the current time to reach the set value before pressing the F1 (YES) key to set the time.
Page 111: Displaying Data Log Records
Model FT3 Model FT3 Data Logger Displaying Data Log Records The data logger supports 31 records, record #1 being the latest recorded value and 31 being the oldest. From the normal operating mode, press F1 and F4 keys at the same time: Data Log Rec #1 NOTE! Record #1 is the most recent interval total, record #31 is the oldest.
Page 112: Maintenance
Refer to "Returning Your Meter" on p. 136. Flow Calibration and Calibration Validation To ensure high accuracy of your model FT3 Flow Meter, Fox Thermal provides a full NIST traceable calibration. It is recommended that the meter's accuracy be checked annually by performing the CAL-V™...
Page 113: Safe Meter Removal From Retractor
Model FT3 Maintenance Instructions for Removing and Inserting the Meter from a Pressurized Pipe using the Retractor WARNING! Possible injury or damage to equipment may occur if the retractor is not used correctly. Please read the following instructions carefully prior to using the retractor.
Page 114 Model FT3 Maintenance Step 2 - Remove the Probe from the Retractor Body Fig. 7.2: Identification of Retractor Parts for the FT3 Flow Direction Arrow Compression Nut Compression Fitting Nipple Ball Valve 5. Continue supporting the meter while performing the following steps.
Page 115 Model FT3 Maintenance 9. Carefully slide the probe out of the retractor along with the fitting while supporting the meter as it comes out. Be careful while handling the meter so the sensor does not get damaged. How to Insert the Probe into the Flow Stream (Valve closed, System Pressurized) WARNING! Never stand where your body or any part of it is in front of the meter.
Page 116: Troubleshooting
CAUTION! The electronics and sensor supplied by Fox Thermal are calibrated as a single precision mass flow meter. Interchanging sensors will decrease 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 117 Model FT3 Troubleshooting Problem Possible Cause(s) Action(s) Display Error 1. Loose or damaged 1. Visual inspection. ribbon cable 2. Return the meter or display for repair. 2. Damaged electronics 3. Operate meter between -20 to 70°C 3. Ambient temperature Flow measure- 1.
Page 118: Installation Problems
If the voltage supplied at the input terminals of the FT3 is not within the range of 21.6VDC to 26.4VDC, a variety of problems can occur including a dim display, inaccurate flow readings or faulty 4-20mA, pulse and communication interface.
Page 119: Calibration Validation Troubleshooting
Model FT3 Troubleshooting Troubleshooting CAL-V™ If the FT3 meter fails a CAL-V™ Calibration Validation test, follow the steps below: 1. Flow rate in the pipe: • Run the test again under a higher flow rate if possible. 2. The sensor may be dirty or damaged: •...
Page 120: Alarm Codes
Busy Meter is recalculating new parameters. Sensor Bridge The FT3 sensor readings are not correct. Check the sensor wiring to the Shutdown FT3 electronic enclosure and remote enclosure.. Database CRC Refer to the PARAMETER MENU 2 section on p. 74 of this Manual to Error reset CRC.
Page 121 Code Totalizer Error See "Reset the Total and Elapsed Time" on p. 74 for steps to clear Detected Error Code. Contact Fox Thermal for possible causes. CAL-V™ in Wait until the CAL-V™ or Cal Set is finished. progress ADC12 versus...
Page 122: Appendices
Model FT3 Appendix Performance Specs Flow Accuracy: ±1% of reading ±0.2% of full scale Accuracy specification applies to customer's selected flow range Maximum range: 15 to 60,000 SFPM (0.07 to 280 NMPS) Minimum range: 15 to 500 SFPM (0.07 to 2.4 NMPS) Straight, unobstructed pipe requirement Insertion Meters: 15 diameters upstream;...
Page 123 NOTE! To determine if the FT3 will operate accurately in other pipe sizes, divide the maximum flow rate by the pipe area. The application is acceptable if the resulting velocity is within the velocity range above. Check Fox Thermal website for velocity calculator.
Page 124 • Isolated USB 2.0 for interfacing with a laptop or computer is standard. • FT3 View™: A free PC-based software tool that provides complete configuration, remote process monitoring, and data logging functions through USB communication. 4-20mA and Loop Verification: Simulation mode used to align 4-20mA output with the input to customer’s PLC/DCS.
Page 125: Agency Approvals
Model FT3 Appendix Agency Approvals CE: Approved EMC Directive; 2014/30/EU Electrical Equipment for Measurement, Control and Lab Use: EN61326-1:2013 Low Voltage Directive (LVD): 2014/35/EU Product Safety Testing: EN 61010-1: 2010 Pressure Equipment Directive: 2014/68/EU Weld Testing: EN ISO 15614-1 and EN ISO 9606-1, ASME B31.3 FM and FMc: Approved Class I, Division 1, Groups B,C,D;...
Page 126: Dimensions
Model FT3 Appendix Fig. 8.1: Insertion Meter with Retractor Dimensions Dimensions shown in inches (millimeters). (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 8.1: Insertion Meter with 316 stainless steel probe Probe Size Dimension “LL”...
Page 127 Model FT3 Appendix Fig. 8.2: 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) “LL” 0.87 (2.2)
Page 128 Model FT3 Appendix Fig. 8.3: Remote Mounting Kit Dimensions SIDE VIEW BRACKET 2x U-BOLT W/NUT JAM NUT SEE ADAPTER DETAIL PROJECTIONS ADAPTER Ø2.38 WASHER 2 IN. PIPE THREADS ADAPTER DETAIL FRONT VIEW FT4X ENCLOSURE 2.81 4x Ø.344 2.81 MOUNTING HOLE DETAIL...
Page 129 Model FT3 Appendix Fig. 8.4: 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 8.4: Insertion Meter with 316 stainless steel probe Probe Size Probe Size Dimension “LL” ± .10 Dimension "HH"...
Page 130 Model FT3 Appendix Fig 8.5: 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 8.5: Insertion Remote Meter with 316 stainless steel probe...
Page 131 Model FT3 Appendix Fig. 8.6: Inline Meter with 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 8.6: Inline Meter with Flow Body and NPT End Connections...
Page 132 Model FT3 Appendix Fig 8.7: Inline Remote Meter with Flow Body and NPT End Connections Dimensions (9.1) (11.2) (5.1) (11.7) Input Power (11.4) Remote Cable, 5 Conductor, (13.2) Shielded, 100FT Max. “HH” 2x NPT Male Thread “L” Table 8.7: Inline Remote Meter with Flow Body and NPT End Connections...
Page 133 Model FT3 Appendix Fig. 8.8: Inline Meter with Flow Body and 150 lb. 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 8.8: Inline Meter with Flow Body and 150 lb. RF Flange End Connections Dimensions...
Page 134 Model FT3 Appendix Fig 8.9: Inline Remote Meter with Flow Body and 150 lb. 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” Table 8.9: Inline Remote Meter with Flow Body and 150 lb. RF Flange End Connections Dimensions...
Page 135: Warranty
Warranty Statement and Terms and Conditions Limited Warranty - All Products Fox Thermal warrants that for a period of one year following the date of original shipment of Fox’s products that the product will conform to Fox’s standard written specifications applicable to such product and will be free from defects in workmanship.
Page 136: Returning Your Meter
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.foxthermal.
Page 137: Definitions
Model FT3 Appendix Glossary of Terms and Definitions American Wire Gauge Normal Liter Bara Bar absolute NLPH Normal Liter per Hour Contact NLPM Normal Liter per Minute Calibration Normal cubic Meter Change NM3/H Normal cubic Meter per Hour Communication NM3/M...
Page 138 Model FT3 Appendix Index Preventative Maintenance, p. 112 Access to Electronics, p. 33 Product Description, p. 17 Alarm Codes, p. 120 Alarm wiring, p. 40 Programming Analog 4-20mA Output, p. 54 Analog 4-20mA output, p. 54 Alarm Output, p. 58 Breakage or Damage of Probe, p.
Page 139 Appendix | 139...
Page 140 Definition of Terms Wiring NOTE! is used for Notes and Troubleshooting Tips 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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