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Fox Thermal Instruments FT3 User Manual Download Page 22

F1 F2 F3 F4

Press 

YES (F1) 

key to verify the Zero CAL-CHECK™.

F1 F2 F3 F4

WARNING: You must verify that there is a no flow condition before 
proceeding.  Be sure to isolate the sensor completely - any air movement 
(even from a fan) can result in a false "Fail" result.

Once process is stable, press 

YES (F4) 

key to begin the Zero CAL-CHECK™.

F1 F2 F3 F4

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. 

F1 F2 F3 F4

Upon test completion, the final value will be displayed along with a Pass/Fail 
message.

Diff=x.xxx  %
   Passed                                OK

  

Process Zero and

  Stable?                                YES

                                     

Verifying ZRO
Diff = xx.xx                 T=xx

               

VERIFY ZRO?

   YES                                     NO                           

          

22

Operation: Zero CAL-CHECK

™

Zero CAL-CHECK

™

 - 

Out of Pipe

Calibration Validation

OPERA

TION

Summary of Contents for FT3

Page 1: ...www foxthermalinstruments com 399 Reservation Road Marina CA 93933 SPECIAL FEATURE OF THE FOX MODEL FT3 THERMAL MASS FLOW METER TEMPERATURE TRANSMITTER CalibrationValidation User s Guide Fox Thermal Instruments Inc ...

Page 2: ...ts believes that the information provided herein is accurate however be advised that the information contained herein is NOT a guarantee for satisfactory results Specifically this information is neither a warranty nor guarantee expressed or implied regarding performance merchantability fitness or any other matter with respect to the products nor recommendation for the use of the product process in...

Page 3: ...8 b Zero CAL CHECK Page 8 c Achieving Zero Flow Page 8 In Pipe Page 8 Out of Pipe Page 8 d Setting Field Baseline Page 9 e Packing Gland Assembly Page 10 f Starting the Field Baseline Set Page 13 3 Operation Page 16 a Performing CAL V Page 16 b Performing Zero CAL CHECK Page 18 In Pipe Page 19 Out of Pipe Page 20 4 Glossary of Terms and Abbreviations Page 24 5 Troubleshooting Page 23 6 Index Page ...

Page 4: ...t all Fox flow meters meet specified performance parameters and provide accurate repeatable measurements in the field all calibrations are performed with NIST traceable flow standards Each meter is shipped from the factory with a Fox Calibration Certificate Calibration Validation Validating the calibration of your FT3 Flow Meter is simple and easy By performing two simple tests in the field operat...

Page 5: ...ted using FT3 View software Test compares sensor characteristics at zero flow at ambient temperature and atmospheric pressure with factory characteristics Used to confirm Zero CAL CHECK when insitu zero flow condition cannot be established Operator initiated from front panel or FT3 View Test takes less than 5 minutes after out of pipe set up complete Calibration Validation Certificate can be gener...

Page 6: ...ctrical characteristics These site determined characteristics are compared with the data that was collected at the factory during the original meter calibration Matching data within established tolerances confirms the meter is accurate within published accuracy specifications This test can be performed under no flow or normal flow conditions The test takes about 4 minutes to complete At the conclu...

Page 7: ...can be established the sensor does not need to be removed and the procedure can be done in the pipe Alternatively a Fox Packing Gland Assembly can be used to remove the sensor from the gas stream to create a no flow condition Note If the Zero CAL CHECK test is performed using the Fox FT3 View Software at the completion of the test a Zero CAL CHECK Certificate may be printed for a record of the tes...

Page 8: ...CAL CHECK testing can be achieved in one of two common ways 1 Fox Packing Gland Assembly The first in situ option is achieved through the use of a Fox Packing Gland Assembly 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 This is particularly ben...

Page 9: ...le Setting Field Baseline for In Situ Zero CAL CHECK tests After calibration of every FT3 meter a lab technician sets the factory baseline for Zero CAL CHECK tests If you are planning on removing the meter from the process to perform the test you do not have to set the baseline however if you plan to perform the test in situ in the pipe or using a Fox Packing Gland Assembly you must set the field ...

Page 10: ...o set the field baseline for or performing an in situ Zero CAL CHECK test If you are not using a Fox Packing Gland Assembly move ahead to Starting the Field Baseline Set on p 13 Note If you need information on the installation of the Fox Packing Gland Assembly refer to Fox Document 102497 Fig 2 2 FT3 and Parts of Fox Packing Gland Assembly 10 Start Up CalibrationValidation START UP www foxthermali...

Page 11: ...late the sensor it must be retracted from the pipe Loosen the small nut of the compression fitting using 7 8 and 13 16 wrenches Once loosened the probe will be able to slide upwards see Figure 2 4 below Fig 2 4 Loosening the Compression Fitting 11 Start Up CalibrationValidation START UP 399 Reservation Road Marina CA 93933 Ph 831 384 4300 Fax 831 384 4312 Packing Gland Assembly ...

Page 12: ...be up through the packing Gland Assembly until the internal stop makes contact Close the Valve Shut off handle by turning the lever 90 clockwise to isolate the sensor within the chamber of the Packing Gland Assembly Then slightly tighten the compression fitting to keep a seal in the chamber Fig 2 5 Isolating the Sensor in Packing Gland Assembly Chamber 12 Start Up CalibrationValidation START UP ww...

Page 13: ...talled and wired correctly see the Fox FT3 Instruction Manual that came with the meter power on the meter The meter should default to display 1 Press F1 to program the meter Press Yes F1 to set Parameters and you will be prompted to enter the password Use a Level 2 password 9111 The display will show F1 F2 F3 F4 Press FLO F2 to go to the Flow Parameter 1 Menu F1 F2 F3 F4 Press DGN F1 to go to the ...

Page 14: ...t you must make sure that there is a no flow condition in the pipe see Techniques for Achieving Zero Flow In the Pipe on p 8 Also be sure that the meter will be stable for the duration of the setting process Process Zero and Stable YES SET ZRO Ref YES NO ZERO PIPE TEST VER SET PRM EXIT ZERO CHK MENU PIP BTL EXIT DIAGNOSTIC CALV ZRO EXIT 14 Start Up CalibrationValidation START UP www foxthermalinst...

Page 15: ...figuration the set may take between 5 15 minutes to complete Note Do not interrupt the set by touching the meter or changing conditions in the pipe At the conclusion of the set the display will show F1 F2 F3 F4 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 Setting ZRO ref ZR x xxxxx T xx Ref x xxxx OK 15 Start Up C...

Page 16: ...ate This test can be performed under no flow or normal flow conditions The test takes up to four minutes to complete At the conclusion of the test a Pass or Fail message will be displayed Press F4 at the conclusion of the test to return to normal measuring mode or to terminate the test Press FLO F2 from the main menu The display will show F1 F2 F3 F4 Press DGN F1 The display will show F1 F2 F3 F4 ...

Page 17: ...F1 F2 F3 F4 This test will take up to 4 minutes less time if there is flow and will show the Cal value changing as the power to the sensor is adjusted The T xxx is a count down Caution The CAL V test is valid for checking the calibration accuracy of flow meters installed in the applications for which it was calibrated including the gas gas mixture calibration range and pipe size shown on the calib...

Page 18: ...is used to confirm that the flow meter still retains its original NIST traceable calibration at zero flow and that the sensor is free of film or residue tat may affect readings The test takes less than 5 minutes to complete At the conclusion of the test a Pass or Fail message will be displayed Press F4 at the conclusion of the test to return to normal measuring mode or to terminate the test Press ...

Page 19: ...choose to perform the test in the pipe The display will show F1 F2 F3 F4 Press VER F1 key to verify the Zero CAL CHECK F1 F2 F3 F4 Press YES F1 key to verify the Zero CAL CHECK F1 F2 F3 F4 WARNING If you are using Pipe test you must verify that there is a no flow ZERO CHK MENU PIP BTL EXIT DIAGNOSTIC CALV ZRO EXIT ZERO PIPE TEST VER SET PRM EXIT VERIFY ZRO YES NO Process Zero and Stable YES 19 Ope...

Page 20: ...ss 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 Press FLO F2 from the main menu The display will show Verifying ZRO Diff xx xx T xx Diff x xxx Passed OK NOTE For best results 1 Use the factory supplied PVC sensor protector shipped with the meter see Fig 2 1 on p 9 2 Place the m...

Page 21: ...2 F3 F4 Press BTL F2 to choose to perform the test out of the pipe The display will show F1 F2 F3 F4 Press VER F1 key to verify the Zero CAL CHECK DIAGNOSTIC SIM TST EXIT DIAGNOSTIC CALV ZRO EXIT ZERO BTL TEST VER EXIT ZERO CHK MENU PIP BTL EXIT FLOW PARAMETER 1 DGN UNT PRM EXIT 21 Operation Zero CAL CHECK CalibrationValidation OPERATION Zero CAL CHECK Out of Pipe ...

Page 22: ...s stable press YES F4 key to begin the Zero CAL CHECK F1 F2 F3 F4 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 F1 F2 F3 F4 Upon test completion the final value will be displayed along with a Pass Fail message Diff x xxx Passed OK Process Zero and Stable YES Verifying ZRO Diff xx xx T xx VERIFY ZRO YES NO 22 Operation Zer...

Page 23: ...room included could be affecting the sensor For best results be sure to use the factory supplied PVC sensor cover see Fig 2 1 on Page 9 If the factory supplied PVC sensor cover is unavailable use a clean dry plastic beverage bottle In Pipe If using the Packing Gland Assembly be sure that the Shut off valve has been closed Make sure that there is a no flow or zero flow condition on the meter s sens...

Page 24: ...s and Definitions CalibrationValidation DEFINITIONS CAL Calibration Diff Difference DN Down DSP Display I O Input Output NIST National Institute of Standards and Technology PC Personal Computer PRM Parameters PSW Password SIM Simulation ...

Page 25: ...ion p 4 CAL V Introduction p 6 Start Up p 8 Performing CAL V p 16 Baseline Factory Baseline p 9 Field Baseline p 9 Setting Field Baseline p 13 Packing Gland Assembly p 10 Troubleshooting CAL V Page 23 Zero CAL CHECK Page 23 Zero CAL CHECK Introduction p 7 Start Up p 8 Performing Zero CAL CHECK In the Pipe p 19 Out of Pipe p 20 ...

Page 26: ...i Caution Wiring Definition of Terms Troubleshooting Tips Information Aa ...

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