DBM 620
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Air flow meter Foldable frames* & hoods Switch between hoods quickly and easily Lightweight and compact Easy to transport Measuring range from 35 to 4250 m3/h (10 to 1181 L/s) Hoods flow straightener Compatible with all air vent types (with transport case) Google Play Download on the FunctiyTrfl • Simultaneous display of up to 4 parameters. Choose between: - airflow - relative humidity - atmospheric pressure - temperature - differential pressure - air velocity • Corrections based on diffusor type for accurate measurements (via the app) • ACR function (Air Change Rate) • Automatic airflow direction (extraction or air blast) • Automatic averaging or point by point averaging • HOLD function • Removable measuring unit (micromanometer function) • Long range & Low energy wireless connection Technical specifications Parameters Accuracy*” Measuring range Resolution Airflow (calculated parameter) ±3% of the measurement ±3 L/s From 10 to 1181 L/s 1 L/s From 0.2 to 10 m/s 0.01 m/s up to 3 m/s and 0.1 m/s above From 39 to 1969 ft/min 1 ft/min Air velocity (calculated parameter) ±3% of the measurement ±0.04 m/s ±3% of the measurement ±8 ft/min Relative humidity (capacitive sensor) Atmospheric pressure Repeatability, linearity: ±1.5% RH(2) (from 10 to 80% RH and from 10 to 50 °C)(3) Hysteresis: 0.8% RH at 25 °C Time drift: <0.5% RH per year in normal conditions of use (from 5 to 50°C and from 20 to 80% RH, apart from indoor pollutants) ressure ±0.2% of reading ±0.008 inWg(5) From -10 to 10 inWg 0.001 inWg (1)All accuracies indicated in this document were stated in laboratory conditions and can be guaranteed for measurement carried out in the same conditions or with calibration compensation. (2)Accuracy in RH depends on temperature: typical ±2% RH below 10 °C (50 °F) and above 50 °C (122 °F). (3)The sensor shows best performance when operated within recommended normal temperature and humidity range of 5 °C - 60 °C (50 - 122 °F) and 20% RH-80% RH, respectively. Long-term exposure to conditions outside normal range, especially at high humidity, may temporarily offset the RH signal (e.g.+3% RH after 60h kept at >80% RH). After returning into the normal temperature and humidity range the sensor will slowly come back to calibration state by itself. Prolonged exposure to extreme conditions may accelerate ageing. (4)Tolerated overpressure: 344.73 mbar. Proof pressure: 500 mbar. Burst pressure: 750 mbar. / (5)Potential drift: ±0.04% of reading per degree. / (6)From 0 to 1 Pa: 0.001 Pa / 1 to 20 Pa: 0.01 Pa / 20 to 2500: 0.1 Pa *Foldable frame patent granted in France (patent number: 1859064) Google Play and the Google Play logo are trademarks of Google LLC. / App Store is a

Kit content Display On smartphone or tablet(1) (1) Device not provided (2) We recommend the use of type Nx PCA9002 batteries Standard DBM 620: • 1 Base including the measurement grid and a temperature and hygrometry probe • 1 Removable measuring unit with wireless connection and 4 alkaline batteries LR6 AA 1.5 V • 1 Hood of 610 x 610 mm (2 x 2 ft) with flow straightener and foldable frame • 1 Sheath including the 4 frame fixing rods • 2 x 0.80 m of silicone tube • Replacement hinges for frames • 1 Transport case • 1 Calibration certificate • 4 Additionnal hoods: - 1 Hood of 720 x 720 mm...

Functions of the micromanometer housing Measurement grid The electronic housing can be used alone to perform the following functions: The measurement grid is attached to the base and measures 24 different points throughout the surface of the flow area. Measurement is performed using a differential pressure sensor calibrated in atmospheric pressure and temperature, and compensated in temperature. In air velocity and airflow: • Choose between the Pitot tube, Debimo blades, coefficient or measurement grid • Section selection • Unit selection • Point/point, automatic or automatic point/point...

Accessories Description Part number Removable unit ONLY Range from 0 to 99,999 m3/h / -2500 Pa to 2500 Pa, micromanometer function: measurement of air velocity and airflow with different differential pressure instruments (Pitot tube, Debimo), compensation of the measurement according to thermocouple temperature. Supplied with 2 x 0.80 m of silicone tube and calibration certificate Tripod Telescopic tripod with casters. Adjustable height from 1.20 to 4 m. Supplied with soft case. For DBM 620 and measurement grid. DBM 620 replacement carry case *Each hood is supplied in its transport bag....