Delta OHM HD2303.0, Manual

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10.2 ON LINE INSTRUMENT PROBES AND MODULES TECHNICAL DATA
10.2.1 Wind speed measurement probes
Hot-wire probes: AP471 S1 - AP471 S2 - AP471 S3 - AP471 S4 - AP471 S5
AP471 S1 - AP471 S3 AP471 S2
AP471 S4
AP471 S5
Type of measurements Wind speed, calculated flow rate, air temperature
Type of sensor
Speed NTC thermistor Omnidirectional NTC thermistor
Temperature NTC thermistor NTC thermistor
Measurement range
Speed 0.05…40m/s 0.05…5m/s
Temperature -30…+110°C -30…+110°C 0…80°C
Measurement resolution:
Speed
0.01 m/s
0.1 km/h
1 ft/min
0.1 mph
0.1 knot
Temperature 0.1°C
Measurement accuracy
Speed ±0.1 m/s (0.05…0.99 m/s) ±0.02m/s (0.05…0.99 m/s)
±0.2 m/s (1.00…9.99 m/s) ±0.1m/s (1.00…5.00 m/s)
±0.6 m/s (10.00…40.0 m/s)
Temperature ±0.4°C (-30…+110°C) ±0.4°C (-30…+110°C)
Minimum speed 0.05 m/s
Air temperature
compensation
0…80°C
Battery life
Approx. 20 hours @ 20 m/s with
alkaline batteries Approx. 30 hours @ 5 m/s with
alkaline batteries
Unit of Measurement
Speed m/s – km/h – ft/min – mph – knot
Flow rate l/s - m
3
/s - m
3
/min - m
3
/h - ft
3
/s - ft
3
/min
Pipeline section for flow rate
calculation
0.0001…1.9999 m
2
Cable length ~2m