WMT700 specifications - WMT700

WMT700 Series User Guide

Document code
M211095EN
Revision
K
Language
English
Product
WMT700
Document type
User guide
Table 1. Wind speed measurement performance
Property Description/Value
Observation range

WMT701: 0 … 40 m/s (89 mph)

WMT702: 0 … 65 m/s (145 mph)

WMT703: 0 … 75 m/s (168 mph)

WMT704: 0 … 90 m/s (201 mph)

Starting threshold 0.01 m/s (0.0223 mph)
Resolution 0.01 m/s (0.0223 mph)
Response time 250 ms
Accuracy

0 … 75 m/s (168 mph): ±0.1 m/s (0.2 mph) or 2 % of reading, whichever is greater

75 … 90 m/s (201 mph): ±5 % of reading

Available variables Instant, peak, average, maximum, minimum, gust, lull
Table 2. Wind direction measurement performance
Property Description/Value
Observation range 0 … 360°
Starting threshold 0.1 m/s (0.2 mph)
Resolution 0.01°
Response time 250 ms
Accuracy ±2°
Available variables Instant, average, maximum, minimum
CAUTION Any temporary object (such as snow, ice, or a bird) that blocks the observation path between the ultrasonic transducer heads may lead to inaccurate or incorrect measurements.
In extreme weather conditions, ice or snow accumulation may cause a temporary wind observation blackout even when heating is enabled.
Table 3. Operating environment
Property Description/Value
Operating temperature 

−10 … +60 °C (+14 … +140 °F)

−40 … +60 °C (−40 … +140 °F)

−55 …+70 °C (−67 …+158 °F)

Storage temperature

−60 … +80 °C (−76 … +176 °F)

Operating humidity

0  … 100 %RH

IP rating

IP66 and IP67
Table 4. Powering specifications
Property Description/Value
Operating voltage

9 … 36 V DC (absolute max. 40 V DC) 1

Heating voltage 24 … 36 V DC (absolute max. 40 V DC) 1
Heating power supply requirement 2
Heated transducers

Average 32 W

Peak 40 W

Heated transducers and arms

Average 152 W

Peak 200 W

Heated transducers, arms, and body

Average 252 W

Peak 350 W at 24 V DC

Table 5. Messaging specifications
Property Description/Value
Readout update interval 4 Hz (default) and 8 Hz (optional)
Units available m/s, knots, mph, km/h, V, mA, Hz
Operating mode Automatic message or poll mode
Sonic temperature Celsius degrees
Table 6. Digital outputs
Property Description/Value
Communication interfaces

COM1: RS‑485

COM2: RS‑485, RS‑422, RS‑232, SDI‑12

Communication profiles

WMT700, WS425 ASCII, NMEA Standard and Extended (version 0183), SDI-12 (version 1.3), WS425 ASOS, ROSA MES 12, customized

Bit rate

300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200

Available averages Max. 3600 s
Table 7. Analog outputs
Property Description/Value
Wind speed
Frequency push-pull Pulse 0 V/10 V: 0 … 2 kHz (f = 10 Hz/m/s) (load > 10 kΩ)
Frequency pull-down

Pulse 0.5 V/Vin−2 V (11 V minimum)

0 … 750 Hz (load 50 kΩ ±20 %)

Frequency pull-up

Pulse 1.5 V/Vin−4 V (8 V minimum)

Voltage 0 … 10 V (U = 100 mV / m/s)
Current 0 … 20 mA (I = 0.2 mA / m/s)
Wind direction
Voltage 0  … 10 V (U = 20 mV/°)
Current 0 … 20 mA (I = 50 uA/°)
Potentiometer Reference voltage 1 … 10 V DC, 0 … Vref represents 0 … 359°
Table 8. Mechanical specifications
Property Description/Value
Dimensions (H × W × Ø 3) 348 × 250 × 285 mm (13.70 × 9.84 × 11.22 in)
Weight 1.8 kg (4.0 lb)
Weight
WMT700 wind sensor 1.8 kg (4.0 lb)
Mounting adapter 0.3 kg (0.7 lb)
WMT70FIX mounting kit 1.4 kg (2.2 lb)
Materials
Body and arms, mounting kit Stainless steel AISI 316
Transducers Silicone
Connector housing surface Nickel-plated brass
Figure 1. WMT700 dimensions
Figure 2. WMT70FIX mounting kit dimensions
Figure 3. ASOS mounting adapter dimensions
Table 9. Compliance
Property Description/Value

EU directives and regulations

EMC Directive (2014/30/EU)

RoHS Directive (2011/65/EU) amended by 2015/863

REACH Regulation (EC 1907/2006)

EMC immunity

IEC 61326‑1:2013, IEC 60945

EMC emissions

CISPR 32 / EN 55032, Class B

Environmental

IEC 60068‑2‑1, 2, 6/34, 30, 31, 67, 78, IEC 60529

VDA 621‑415

Maritime IEC 60945:2002 + IEC 60945/Cor1:2008, DNVGL‑CG‑0339

Electrical safety

UL 61010‑1

CAN/CSA C22.2 No. 61010‑1‑12

Compliance marks

CE, China RoHS, RCM, UKCA
Listing marks SGS (USA and Canada)
Table 10. Environmental tests
Test Setup according to
Wind ISO16622; MEASNET
Wind driven rain MIL-STD 810G Method 506.5
Salt fog IEC 60068-2-52, VDA 621 - 415
Leak test (ingression protection) IEC 60529 class IP67
Vibration IEC 60068-2-6
Shock MIL-STD-202G, Method 213B, cond. J
Dry heat IEC 60068-2-2
Damp heat cyclic IEC 60068-2-30
Damp heat IEC 60068-2-78
Low temperature IEC 60068-2-1
Free fall (rough handling) IEC 60068-2-31
Change of temperature IEC 60068-2-14

Wind tunnel tests have been performed according to Sonic anemometers/thermometers - Acceptance test methods for mean wind measurements ISO 16622:2002 and Measnet Anemometer Calibration Procedure Version 2, October 2009.

Vaisala WINDCAP® Ultrasonic Wind Sensor Series WMT700 is safety listed for United States and Canadian markets by SGS. SGS is Nationally Recognized Test Laboratory (NRTL) officially recognized by the American Occupational Safety and Health Administration (OSHA).

1 In maritime environments, the normal input voltage ranges are: operating voltage 10 … 30 V DC (−10 … +30 %) and heating voltage 24 … 30 V DC (−10 … +30 %), as defined in the maritime standard IEC 60945.
2 The actual power consumption depends on the temperature.
3 Diameter of area covered by transducers.