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Model FT2

101364

3.2.4.

RS485 Wiring

W1 jumper is to terminate the bus with a 121ohm resistor and should

only

be installed on the

last

instrument of the daisy chain. W3 and W4 are used for half duplex operation. (W3 connects TX+ &
RX+, W4 connects TX- & RX-).

Figure 3-5 RS485 Wiring and Configuration

Page 20

Fox Thermal Instruments, Inc., 399 Reservation Road, Marina, CA 93933

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Summary of Contents for FT2

Page 1: ...MODEL FT2 THERMAL MASS FLOWMETER TEMPERATURE TRANSMITTER 399 RESERVATION ROAD MARINA CA 93933 101364 Revision I...

Page 2: ...load Technical Data Sheets from our website www foxthermalinstruments com Fox Thermal Instruments believes that the information provided herein is accurate however be advised that the information cont...

Page 3: ...0 mA Output Wiring 18 3 2 3 Frequency Alarm Output Wiring 19 3 2 4 RS485 Wiring 20 3 2 5 Remote Switch Wiring 21 3 2 6 Sensor Wiring 4 wires 22 3 2 7 Remote Wiring Installation 23 3 3 Start Up Sequenc...

Page 4: ...e 46 5 1 Access to Electronics 46 5 2 Sensor Cleaning 46 5 3 Broken or Damaged Probe 46 5 4 Calibration 46 5 5 Fuse Replacement Standard and NFP version 46 6 Troubleshooting 47 6 1 Replacements Parts...

Page 5: ...age over most flowmeters which measure volumetric flow rate Volumetric flow is incomplete because temperature and pressure are unknown and must be measured separately For example the volume of a gas d...

Page 6: ...parts of the FT2 Mass Flowmeter are The FT2 main board the sensor assembly an optional front panel and an optional power supply The two PCBs are mounted inside of the enclosure and the sensor assembly...

Page 7: ...d NXT OK ALM HiFloAlm NXT OK HiFloAlm 0 SCFM CHG OK DISPLAY PASSWORD FLOW PARAMETERS SET 4 20 MA FLO TMP EXIT 20mACnt 4091 CHG OK 4mACnt 3 CHG OK 20 mA 3750 SCFM Level2 Level2 If password is accepted...

Page 8: ...OK RtdHi_F 300 F CHG OK RtdLoRes 192 1 Ohm CHG OK RtdLo_F 70 F CHG OK AdcF 0 0005893 CHG OK Rx 49 9 Ohm CHG OK ShResOfst 0 CHG OK Tsv_rt 0 197656 CHG OK R20_value 2 5 CHG OK Cutoff 1 0 SCFM CHG OK A2...

Page 9: ...type is selected by JP1 1 7 Local Display Options An optional front panel with a LCD display and keypad is available to display measured data and allow field programming of the flowmeter The display i...

Page 10: ...Model FT2 101364 Figure 1 3 Dimensions for Flow Body Style with NPT Connections Page 6 Fox Thermal Instruments Inc 399 Reservation Road Marina CA 93933...

Page 11: ...101364 Model FT2 Figure 1 4 Dimensions for Flow Body with Flange Connections Fox Thermal Instruments Inc 399 Reservation Road Marina CA 93933 Page 7...

Page 12: ...Model FT2 101364 Figure 1 5 Dimensions for Insertion Style Page 8 Fox Thermal Instruments Inc 399 Reservation Road Marina CA 93933...

Page 13: ...101364 Model FT2 Figure 1 6 Dimensions for Remote NEMA 4 Enclosure Fox Thermal Instruments Inc 399 Reservation Road Marina CA 93933 Page 9...

Page 14: ...ng in the direction of flow e Do not install the FT2 enclosure near an igniter igniter controller or switching equipment f Do not install an external power supply in a cabinet containing an igniter co...

Page 15: ...rger install the end of the probe 0 87 inch past the centerline of the pipe and tighten the compression fitting nut Refer to Figure 2 1 c When installing into a 1 inch pipe carefully install the probe...

Page 16: ...Length Sensor Element Note In extreme low flow measurements below 30 standard feet per minute convection heat from the longer probe can affect the shorter probe In these applications chose a mounting...

Page 17: ...t 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 Fig...

Page 18: ...ded The Model FT2 is welded threaded or flanged to the customer s pipe Care should be taken to ensure that the diameter of the mating pipe is the same diameter as the Model FT2 flow body or errors in...

Page 19: ...ct sensor orientation Note In extreme low flow measurements below 30 standard feet per minute convection heat from the longer probe may affect the shorter probe see Figure 2 3 View A A In these applic...

Page 20: ...g an igniter controller or switching equipment Do not power the power supply with an AC power source that is also used to power an igniter or igniter controller Wiring Installation Warning This flowme...

Page 21: ...ected at the AC ground terminal at the power supply or instrumentation AC ground terminal 3 2 1 Power Input Wiring and Grounding If the optional AC power supply is supplied by FOX the input power can...

Page 22: ...ht hand conduit hub Connect FLOW RATE 4 to 20 mA output to TS2 1 2 Connect TEMPERATURE 4 to 20 mA output to TS2 3 4 Figure 3 3 Isolated Wiring for the 4 20mA Outputs Figure 3 3A Non Isolated Wiring fo...

Page 23: ...ircuit capable of sinking a maximum of 10 mA of current The frequency output is selected when JP1 pins 1 2 are connected together using the shunt provided The alarm output is selected when JP1 pins 2...

Page 24: ...ohm resistor and should only be installed on the last instrument of the daisy chain W3 and W4 are used for half duplex operation W3 connects TX RX W4 connects TX RX Figure 3 5 RS485 Wiring and Configu...

Page 25: ...rogramming mode The switch contacts are de bounced on the FT2 board There is no polarity requirement on these connections Use TS2 12 and TS2 13 When the 2 curve option is ordered the switch can be use...

Page 26: ...6 Sensor Wiring 4 wires Note Sensor terminations are performed at the factory except when Remote Electronics are provided Figure 3 7 Sensor Wiring Page 22 Fox Thermal Instruments Inc 399 Reservation...

Page 27: ...3 8 Connect other end to connector TS8 see Figure 3 7 on the main FT2 board as follows Red wires to TS8 pin 1 2 white wires to TS8 pins 5 6 and yellow wire to TS8 pin 3 If you are using your own cabl...

Page 28: ...y is accomplished by pressing the F1 or F2 key to view the next or previous screen Pressing the F1 and F2 keys at the same time enters the Engineering Menu screens display 10 through 22 Keys F1 and F2...

Page 29: ...t the same time Display 3 Fixed screen Prompt screen to enter programming mode Display 4 1456 5 SCFM 123456 SCF Elp 14 6 HR 88 5 F Alarm None Elp 14 6 H SET PARAMETER No Yes F2 F1 F1 F1 F2 F2 F3 F4 F4...

Page 30: ...lay 16 Display 17 Display 18 Display 19 Display 22 Display 20 Display 23 Display 21 FloHi 1000 SCFM FloLo 0 SCFM TmpHi 100 F TmpLo 50 F ELP 11 77 HR Stat hex 0000 Vers FT2 V1 40 Display V1 22 Back to...

Page 31: ...9 Alarm Indications Alarm indications are provided to indicate any malfunctions out of range values or saturated analog outputs The following list is a description of alarm codes Code Description 12 P...

Page 32: ...git or character the cursor points to the selected digit Press NXT F3 to select the next digit and OK F4 to accept the entry Note If the UP F1 or DN F2 key is held down for more the 1 second the progr...

Page 33: ...s 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 If the password is accepted the following screen...

Page 34: ...20 mA set point the analog output will stay at 20 mA and an alarm code will be generated 4 1 4 Frequency Output The frequency output can be configured in three different ways 1 specifying a maximum f...

Page 35: ...ring data in Unit per Pulse Press U P F2 and the following screen will show UNT PLS 0 01 CHG OK F1 F2 F3 F4 Press CHG F1 to change the setting and then OK F4 to accept entry The value entered is in un...

Page 36: ...O F1 again SET I O COM CTC EXIT F1 F2 F3 F4 Then press CTC F2 to select contact input output CONTACTS INP ALM EXIT F1 F2 F3 F4 4 1 5 1 For Discrete Input Settings Press INP F1 key to select input then...

Page 37: ...then the menu will display HiFloAlm 1000 SCFM CHG OK F1 F2 F3 F4 Enter the limit value to trigger the contact alarm output and then press OK F4 to accept the setting Press EXIT F4 repeatedly until No...

Page 38: ...hardware is needed to use Profibus DeviceNet and Ethernet For Modbus selection only Baud 9600 NXT OK F1 F2 F3 F4 Press NXT F1 to select the baud rate and press OK F4 Selections are 19200 9600 4800 240...

Page 39: ...s CHG F1 to change the Modbus address and then press OK F4 To avoid conflicts on the Modbus this must be a unique address NOTE If any parameter for MODBUS is changed the unit requires a RESET or power...

Page 40: ...Off Press OK F4 to accept selection Press EXIT F4 repeatedly until Normal Mode is seen briefly to exit the programming mode ALTERNATE Off NXT OK F1 F2 F3 F4 4 1 8 Password There are 2 user level passw...

Page 41: ...ture pressure reference and the settings of reference temperature reference pressure and density of gas when using Lbs time or Kg time These values will be set at FOX using the Application Data Sheet...

Page 42: ...e FT2 will not re calculate these values and these values must be re entered manually After pressing OK F4 to accept the Flow unit the display will prompt for the temperature unit setting TMP UNT Deg...

Page 43: ...d the display will prompt for the gas density if LBS or KG was selected for flow unit DNS 0 988876 KG m3 CHG OK F1 F2 F3 F4 Press CHG F1 to change and OK F4 to accept Note The density entry is only us...

Page 44: ...wmeter will display a flow value of zero A 2 0 05672 Ft 2 CHG OK F1 F2 F3 F4 Enter the pipe area in square meters or square feet and then press OK F4 key Use square meter for metric flow unit selectio...

Page 45: ...F3 F4 This is the upper flow limit alarm value that can be associated with a discrete output An alarm code is generated when the flow value exceeds this limit If no checking is needed this value shoul...

Page 46: ...menu was entered with a Level 2 password then more menus will be shown that deal with factory set parameters that should not be changed 4 1 11 Calibration Parameters This menu allows changing the fact...

Page 47: ...and F4 keys at the same time in the normal running mode RESET TOTAL NO YES F1 F2 F3 F4 Press YES F4 to reset total and NO F1 to cancel If you entered the programming menu with a Level 2 password The...

Page 48: ...set to zero Caution If the 4 to 20 mA and or the pulse outputs are connected to controllers set the controllers to manual This will ensure that the simulated signals do not cause false controller acti...

Page 49: ...CSV and should be set to zero for normal mode Enable SIM YES NO F1 F2 F3 F4 Press YES F1 to start the simulation mode NO F4 otherwise Upon pressing either key the program will return to the FLOW PARA...

Page 50: ...gh the sensor elements are rugged and breakage resistant avoid touching them with any solid object and use a light touch while cleaning them 5 3 Broken or Damaged Probe If the sensor is broken or dama...

Page 51: ...flow meter to Fox for repair refer to section 6 2 for shipping instruction f Install meter accordingly to guidelines The following is a summary listing of problems occasionally encountered with the F...

Page 52: ...alibration Certificate delivered with the flowmeter contains the area that was programmed into the flowmeter at the Fox factory Verify that this area was entered correctly 6 Erratic flow reading espec...

Page 53: ...cted to do otherwise the entire flow meter must be returned including all electronics Clean and decontaminate all wetted parts Please include information describing the difficulties experienced purcha...

Page 54: ...at its option any defective parts which are returned Labor and related expenses incurred by the Customer to install replacement parts are not covered by this warranty e As to replacement parts suppli...

Page 55: ...tional Electrical Manufactures Association NIST National Institute of Standards and Technology NLP Normal Liter NLPH Normal Liter per Hour NLPM Normal Liter per Minute NM3 Normal cubic Meter NM3 D Nor...

Page 56: ...Mode 24 Menu Tree 3 Mounting Flow Body Style 14 Mounting Insertion Style 10 Power Input Wiring and Grounding 17 Preventative Maintenance 46 Product Description 1 Programming 4 20 mA Output 29 Programm...

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