Vaisala WAT12 - Manual (Page 42)

User's Guide ________________________________________________________
40 _____________________________________________________M210309EN-A
Property Description / Value
Signal cable 4 wires minimum
(VIN+, VIN-, DOP, SOP)
Max. loop resistance
(incl. cable and
receiver's input
resistance) 1800 ohm for 5 mA loop
900 ohm for 10 mA loop
450 ohm for 20 mA loop
Full scale options:
for direction
for speed
0 ... 360° / 0 ... 540°
0 ... 51.2 m/s / 0 ... 76.8 m/s
Resolution:
for direction
for speed
±2.8 °
0.1 m/s
Updating interval:
for direction
for speed
8 times a second (with no averaging)
Once a second (averaged over
previous 1 s period)
Output accuracy Better than 1 % of full scale
Accuracy with loop
resistance:
RL= 100 Ω
RL= 20 ... 2000 Ω
±0.2 % of full scale at +25 °C
±0.8 % of full scale at full temp. range
Pulse-mode power
feed:
to the vane
to the anemometer
Nominally 490 µs wide pulse,
applied every 125 ms
Nominally 70 µs wide pulse,
applied every 0.49 ms .
Testing references:
for direction
for speed
000° / 008° / 357°
0.0 m/s / 0.8 m/s / 51.2 m/s
Dimensions:
printed circuit board
junction box
114 × 69 mm
2
125 (w) × 80 (h) × 57 (d) mm
Cross arm length 800 mm
Ingress protection IP65
Mounting To a Ø 60 mm pole mast
Weight 1.5 kg
Material:
cross arm
junction box
AI anodized
AI painted gray
Temperature range:
operating
storage
-55 ... +55 °C
-60 ... +70 °C
Humidity 0 ... 100 %RH