F&J - Model VFD -Vacuum Fluorescent Display Air Flow Calibrator
Notable Features: Vacuum Fluorescent Display: (4 lines×24 characters). 4 button key pad for stand alone operation. Mass flow or Volumetric flow. Volume Totalization Feature. Operator selectable Reference T and P. Operator selectable engineering units. Multi gas option. ± 1.0% Full Scale (F.S.) Accuracy. User customizable calibration report. Semi-Automatic calibration-verification when used with F&J digital air samplers. PC Interface program: Western or Asian languages. Two Year Warranty. Complimentary Storage Case.
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MEASUREMENT PRINCIPLE
- Flow Sensor: Differential Pressure Sensor
- Standardization: Operator selectable values for reference temperature and pressure
- Flow Curve linearization: Individually calibrated and software corrected
MEASUREMENT RANGES
- Air flow: Various flow ranges available
- Temperature: -40º - 122º F (-40º - 50º C)
- Barometric pressure: 30 - 22 In-Hg (760 - 559 mm-Hg); (101.325-74.5 kPa)
- approx. Sea level to 5900 ft. (1800 m) elevation above sea level
- Optional low range to 10 In-Hg (254 mg) (33.86 kPa)
MEASUREMENT ACCURACY
- Air flow: ± 1.0% of full scale
- Temperature (Typical): + 1ºC over range –20ºC to 50ºC
- Barometric pressure: ± 1% of reading over measurement range of 22.00-30.00 “Hg
STANDARD TEMPERATURE and PRESSURE CHOICES:
- Temperature 32ºF (0ºC) 59ºF (15.0ºC) 68ºF (20.0ºC) 70ºF (21.1ºC) 77ºF (25.0ºC)
- Pressure
- 29.92”Hg (1 atm, 760mm Hg, 1.013 bar, 101.325 kPa)
- 1 bar, (100kPa, 750mm Hg, 0.987 atm 29.53”Hg)
