Vaisala WXT520 - Manual (Page 145)

Chapter 11 ____________________________________________________ Technical Specifications
VAISALA______________________________________________________________________ 143
Operating Conditions
Table 18 Operating Conditions
Property Description/Value
Housing protection class IP65 (without mounting kit)
IP66 (with mounting kit attached)
Temperature
Operation
-52 ... +60 °C (-60 ... +140 °F)
Storage -60 ... +70 °C (-76 ... +158 °F)
Relative humidity 0 ... 100 %RH
Pressure 600 ... 1100 hPa
Wind 1
1. Due to the measurement frequency used in the sonic transducers, RF
interference in the 200-400 kHz range can disturb wind measurement.
Any temporary element or object (snow, ice, bird etc.) blocking the
measurement path between the ultrasonic transducer heads may affect the
wind measurement accuracy or even invalidate the output data.
0 ... 60 m/s
Table 19 Electromagnetic Compatibility
Applicable
Standard Description Level tested
Performance 1
1. A = Normal performance
B = Temporary degradation (self-recoverable)
C = Temporary degradation (operator intervention needed)
D = not recoverable
CISPR 22 Radiated emissions 30 Hz - 2 GHz Class B
CISPR 22 Conducted emissions
DC 150 Hz - 30 MHz Class B
IEC 61000-4-2 Electrostatic discharge 6 kV con / 8 kV air B
IEC 61000-4-3 RF field immunity
2
2. Within frequency range 600 ... 700 MHz immunity for PTU is 8 V/m
10 V/m A
IEC 61000-4-4 Electric fast transient 2 kV B
IEC 61000-4-5 Surge 2 kV B
IEC 61000-4-6 Conducted RF
immunity
3 V
emf
A