Extech Instruments HD300 Guia do Utilizador descarregar pdf (Página 11)

HD300-EU-EN V2.2 07/13

Specifications

General Specifications

Display Dual Display Multi-function LCD with 9999 counts

Measurements Air Velocity: m/s, km/h, ft/min, knots, mph;

Air Flow: CMM (m

/min) and CFM (ft

/min);

Air Temperature (through vane) and Surface Temperature (using the IR

thermometer function): °C and °F

Data Hold Freezes displayed reading

Sampling rate 1 reading per second

Sensors Air velocity/Air flow sensor: Conventional angled vane arms with low-

friction ball bearing. Air temperature sensor: Precision thermistor (built

into the vane assembly); Surface temperature via non-contact IR

sensor.

IR Distance to Spot ratio 30:1

IR Spectral response 6 to 14µm

IR Emissivity 0.95 fixed

MIN-MAX-AVG Record and Recall lowest, highest, and average readings

Auto Power OFF Automatic shut off after 15 minutes (can be disengaged)

PC Interface USB PC Communication with supplied software and cable for data

acquisition

Over range indication Dashes appears on the LCD

Low battery indication Battery symbol appears on the LCD

Power supply 9V Battery

Operating conditions Meter: 0 to 50

C (32 to 122

F); 80% RH max.

Sensor: 0 to 60

C (32 to 140

Dimensions / Weight Main instrument: 203 x 75 x 50mm (8.0 x 3.0 x 1.9")

Sensor head: 72mm (2.8”) diameter

Weight 280g (9.8 oz.)

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Extech Instruments HD300 Guia do Utilizador Página 11