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F&J - Model DF-1-2G -Digital Flow Meter Low Volume Air Sampler (100 - 120 VAC)
The Model DF-1-2G portable air sampling system with a digital flowmeter is a low-volume air sampler consisting of oilless, carbon vane vacuum pump, with a mechanical constant air flow regulator for use where a nearly constant air flow is desirable. The regulator holds a constant pressure drop across an in-line orifice by varying the flow through a bypass valve into the pump. This system allows the pump to work at a minimum pressure drop at all times, permitting it to run cooler, thus extending its service life. The oilless pump requires no lubrication to maintain optimal efficiency during its service life. The pump is mounted on a base with four rubber feet. A handle is provided on the chassis to facilitate transportation.
The DF-1-2G Portable Air Sampling System is designed for continuous indoor use. Please consult the product specifications for the design temperature range and the installation category. Standard product displays flow rate, elapsed time and totalized volume by operator selection.
The typical operating flow range is 0.5 to 4 CFM (14 – 115 LPM).
- Bright LED display
- Flowrate and volume totalizations displayed are corrected to a factory settable Reference Temperature and Pressure (4 options available): Classical STP 0ºC, 760 mmHg, Normal T and P 20ºC, 760 mmHg, Modified Normal T and P 21°C, 760mmHg, Standard Ambient T and P 25ºC, 760 mmHg
- Reference or ambient flow conditions are operator selectable
- Elapsed time meter
- RS-232 Communication Port w/Operator selectable download frequency for real-time data
- Storage of elapsed time and volume in the event of power outage
- Auto Shut-off on time or volume
- Choices of flow/volume units:
- SLPM SL
- SCMH SCM
- SCFM SCF
- Display in English or metric units set at factory
- State of the Art microprocessor electronics
- Auto zero calibration feature of flow sensor
- Flow rate accuracy within ± 4.0% F.S.
- 110 – 120 VAC, 50/60Hz; single phase
- Internal Data Storage Downloadable as (.csv) file
- Data download via Type A USB port wired connection or
through Bluetooth with optional Bluetooth Dongle for PC Device
- PUMP TYPE: Oil-less, carbon vane 1/4 HP, 50/60 Hz, 1 PH
- MAXIMUM CAPACITY: 4 CFM (115 LPM) at 0” Hg Pressure drop
- ULTIMATE VACUUM: 25” (635 mm) Hg at sea level
- POWER REQUIREMENTS: 110 – 120VAC; 50/60 Hz; 6 amperes, single phase
- CIRCUIT BREAKER PROTECTION: 10 amperes
- ELECTRICAL CORD: All-temperature, 3-wire, 14 gauge
- THERMAL OVERLOAD PROTECTION: Furnished as an integral part of the motor
- CONSTANT AIRFLOW REGULATOR: Aluminum Construction with silicone diaphragm; adjustable from 0.5 to 4 CFM (14-115 LPM)
- HANDLE: Black Painted Steel
- DIMENSIONS: 16”L×7 ½”W×13 ¼”H (40,6×19×33,6 cm)
- WEIGHT: 36 lbs. (16,36 kg)
- INSTALLATION CATEGORY: Pollution Degree 2
- OPERATING TEMPERATURE RANGE: 32- 104ºF (0 - 40ºC)
- MEASUREMENT ACCURACY:
- Air flow ± 4.0% of full scale
- Temperature ± 2ºF (1.1ºC)
- Barometric Pressure 2% over measured range
- CALIBRATION: Factory calibration 1 per year
- ON-BOARD CALCULATIONS:
- Flow calculation from differential pressure value using best fit curve method
- Flow correction for standard temperature and pressure
- Auto-zero correction utilizing electro-pneumatic method to compensate for offset and drift (automatic, once every minute)
- Bluetooth Dongle for PC Device (P/N: BTDG)