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How accurate are Fox Meters anyway?

Posted on 31st Oct 2017 in Calibration

FT1 Calibration VerificationTo ensure that 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. Furthermore, all calibration equipment is subject to a meticulous metrology program that includes the selection, control and maintenance of measurement standards. Each meter is shipped from the factory with a Fox Calibration Certificate.

CAL-V™ tests the functionality of the sensor and its associated signal processing circuitry and can be done in the pipe and in normal processing conditions. Zero CAL-CHECK®, ensures the repeatability and cleanliness of the sensor. Read more in the 

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.

Model FT1 Quick Specs (see FT1 datasheet for details):
Flow Accuracy: Air: ±1% R ±0.5% FS
Other gases: ±1.5% R ±0.5% FS
Flow Repeatability: ±0.2% of full scale
Flow Response Time: 0.8 seconds (one time constant)
Temperature Accuracy: ±1°F (±0.6°C) Minimum velocity 15 SFPM
Models FT2A and FT3 Quick Specs (see the FT2A datasheet and/or the FT3 datasheet for more details):
Flow Accuracy: ±1% R ±0.2% FS
Flow Repeatability: ±0.2% FS
Flow Response Time: 0.9 seconds (one time constant)
Temperature Accuracy: ±1.8°F (±1.0°C) over the range -40 to 250°F (-40 to 121°C);
±3.6°F (±2.0°C) over the range -250 to 650°F (121 to 343°C);
Minimum velocity 50 SFPM
Model FT4A Quick Specs (see the FT4A datasheet for details):
Flow Accuracy: Air: ±1% R ±0.2% FS
Other gases: ±1.5% R ±0.5% FS
Flow Repeatability: ±0.2% of full scale
Flow Response Time: 0.8 seconds (one time constant)
Temperature Accuracy: ±1°F (±0.6°C) Minimum velocity 15 SFPM

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