Vaisala WMT52 - Manual (Page 118)

User’s Guide ______________________________________________________________________
116 __________________________________________________________________M210925EN-B
Table 13 Inputs and Outputs
Property Description/Value
Operation voltage
5 ... 32 VDC
1
Average current consumption
minimum
0.1 mA @ 12 VDC (SDI-12 standby)
typical 3 mA @ 12 VDC (with default measuring
interval)
maximum 14 mA @ 5 VDC (with constant
measurement with shortest measuring
interval)
Heating voltage Options: DC, AC, full-wave rectified AC
typical ranges 12 VDC ± 20 %, 1.1 A max
24 VDC ± 20 %, 0.6 A max
68 Vp-p ± 20 % (AC), 0.6 Arms max
34 Vp ± 20 % (f/w rect. AC), 0.6 A
rms
max
absolute max 32 VDC
84 V
p-p
(AC)
42 V
p
(f/w rect. AC)
Serial data interfaces SDI-12, RS-232, RS-485, RS-422
Communication protocols SDI-12 v1.3, ASCII automatic & polled,
NMEA 0183 v3.0 with query option
1. Below 5.3 V the measurement performance for high wind speeds may be
degraded.
Table 14 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 0 ... 60 m/s
Vibration IEC 60945, paragraph 8, vibration
1. Due to the measurement frequency used in the sonic transducers, RF
interference in the 200-400kHz 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.