To 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 |
