1. Introduction
Swema 03 is an omnidirectional anemometer for low air velocity (0,05...
3m/s) and air temperature (Swema 03+, Part no: 767361, measures
also barometric pressure). It has a high frequency digital output (Max
100Hz) and connects directly to PC with USB cable (Part no: 767300).
Swema 03 is powered by the USB.
When transporting and not using Swema 03 the very sensitive sensor
should be protected by the protection cage. When it’s time to start
measuring with Swema 03 gently losen the small screw at the bottom
of the protection cage and it will slide down and by that exposing the
sensor to free air. Lock the cage position with the screw and Swema
03 is ready for measurement.
To measure with one probe at a time and also to change settings for
the probe, download the free software SwemaTerminal 3 from our
website www.swema.com and connect the probe with the USB cable
(part nr. 767300).
Swema 03 can be set up with multiple probes with the PC-software
SwemaMultipoint (Part nr: 763710) or any other software connecting
with USB.
2. Technical data
Velocity: 0,05 - 3,00 m/s at 15 - 30 °C
Temperature: 10 - 40°C
Barometric pressure (Only Swema 03+): 600... 1200 hPa
T90 air velocity (90%): 0,2s
Sampling frequency: Max 100 Hz for one probe connected to PC.
Communication: USB & RS-485 MODBUS
Uncertainty:
Velocity:
At 23°C: ±0,03 m/s at 0,05...1,0 m/s, ±3% read value at 1...3 m/s
At 15…30°C: ±0,04 m/s at 0,05...1 m/s, ±5% read value at 1...3
m/s
Temperature:
At 23°C: ±0,3°C
At 10...40°C: ± 0,5°C
Barometric pressure (Only Swema 03+):
±3,5hPa
95% coverage probability in non condensing, non moist air,
<80%RH, non aggressive gases
1.
