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CALIBRATION VALIDATION

FOX MODEL FT3 GAS FLOW METER

SENSOR AND ELECTRONICS TEST

SENSOR TEST AT ZERO FLOW 

VS. 

FIELD

 BASELINE

Zero CAL-CHECK

™

INSITU

INSITU

OUT OF PIPE

•  Complete test of sensor elements and elec

-

tronics

•  In your pipe, under normal process 

conditions

•  Operator-initiated via front panel, FT3 View™, 

MODBUS, or HART

•  Hold outputs at last value or go to zero; 

operator-selectable

•  Test takes less than 5 minutes; 3 minutes 

typical

•  Test results in pass/fail message
•  Data saved in meter for look-up anytime
•  Calibration Validation Certificate can be 

generated if test is initiated using FT3 View™ 
software

•  Customer-set zero flow baseline established 

under normal zero flow conditions

•  Test compares sensor characteristics at zero 

flow with customer-set zero flow baseline

•  Operator-initiated from front panel, FT3 

View™, MODBUS or HART

•  Fail condition indicates possible dirty sensor
•  Use of Fox Packing Gland Assembly to retract 

probe is a convenient way to establish a zero 
flow condition

•  Test takes less than 5 minutes after zero flow 

condition established

•  Calibration Validation Certificate can be 

generated if test is initiated 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 

generated if test is initiated using FT3 View™ 
software

F O X   I S   I S O   9 0 0 1   C E R T I F I E D

The CAL-V

™

 and Zero CAL CHECK

™

 features are of particular value in environmental 

monitoring applications where periodic calibration validation is mandated.  For more 
information, contact a Fox Application Specialist at (831) 384-4300.

CAL-V

™

SENSOR TEST AT ZERO FLOW 

VS. 

FACTORY

 BASELINE

or

Fig. 1.1: Total Calibration Validation

Figure 1.1 above illustrates the Calibration Validation feature and a summary 
of the details for each of the two tests.  

Fox has developed Calibration Validation, using the CAL-V™ and Zero CAL-
CHECK™ tests to help our customers avoid sending the meter back for 
annual or biennial re-calibrations.  

Using Calibration Validation allows our customers to validate the accuracy 
and functionality of the meter in the field with a push of a button. 

5

Introduction

Calibration Validation

INTRODUCTION

Calibration 

Validation

Содержание FT3

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

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

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