Technical data

Visibility (MOR) measurement

Reporting range

1 m … 100 km (3 ft … 62 mi)

Reporting resolution

1 m (3 ft)

Reporting uncertainty in operational

conditions

±10 % or ±1 m at 1 m … 10 km

(±3 ft at 3 ft … 6.2 mi) 1)

±20 % at 10 … 100 km (6.2 … 62 mi)

Measurement error

±0.7 %

1)

Fulfills ICAO Annex 3: ±50 m (164 ft) up to 600 m (1968 ft).

Present weather reporting (optional)

Present weather identification

Drizzle, rain, snow, snow grains,

ice crystals, ice pellets,

freezing rain / drizzle, snow pellets,

hail, fog / freezing fog, mist, haze

Weather codes

SYNOP: WMO table 4680

METAR: WMO table 4678

NWS codes

Light, moderate, and heavy intensities

Precipitation measurement (optional)

Precipitation Intensity

Sensitivity

Single droplet Ø

≧ 0.1 mm (0.004 in)

Reporting range

0.01 … 999.99 mm/h

(0.0004 … 40 in/h) liquid water

equivalent (LWE)

Reporting resolution

0.01 mm/h (0.0004 in/h)

Minimum intensity

0.01 mm/h (0.0004 in/h)

Precipitation accumulation

Reporting range

0 … 999.99 mm (0 … 40 in) liquid

water accumulation (LWA)

Reporting resolution and uncertainty 1) 0.01 mm (0.0004 in), ±2.2 %

Reporting range, snow height

0 … 9999 mm (0 … 32 ft 9 in)

Reporting resolution, snow height

1 mm (0.04 in)

Additional precipitation reporting

Droplet size / fall speed distribution

41 size classes, 26 speed classes

Size / speed measuring range

Ø 0.1 … 35 mm (0.004 … 1.38 in)

0 … 10+ m/s (0 … 32.8+ ft/s)

Radar reflectivity

−9.9 … 99.9 dBZ

Kinetic energy

0.000 … 999.999 J/m2 × h

1)

Proven under laboratory conditions.

Compatibility

System compatibility

Vaisala AviMetâ

Backwards compatibility

Vaisala FD12(P), FS11(P), PWD Series

Measurement specifications

Operating principle

Look-down forward scatter

Scattering angle (main receiver)

42° ±0.25°

Scattering angle (side receiver)

90° ±0.25°

Light source

Near-infrared

Sampling frequency

5 MHz

Measurement cycle

5 s

Mechanical specifications

Material, measurement unit

Aluminum

Material, interface unit

Maritime-grade aluminum

(EN AW-5754)

Coating

Multi-layer coating to prevent

environmental corrosion

Dimensions, measurement unit

354 × 551 × 883 mm

(13.94 × 21.69 × 34.76 in)

Weight, measurement unit

Max. 7.5 kg (16.5 lb)

Dimensions, interface unit with

radiation shield

885 × 380 × 320 mm

(34.84 × 14.96 × 12.60 in)

Weight, interface unit with electronics

Max. 25 kg (55.1 lb)

Inputs and outputs

Operating voltage

Measurement unit with interface unit:

115/230 V AC ±10 %, 50 … 60 Hz

Measurement unit only: 10 … 50 V DC

Heating voltage

24 V AC or V DC ±10 %

Power consumption, typical

Measurement unit with interface unit,

all options: 245 W

Measurement unit: 10.0 W / 24 V

Measurement unit, heating: 180 W

(at 60 W per hood)

Backup battery (optional)

12 V 2.6 Ah

External inputs

Vaisala HUMICAPâ Humidity and

Temperature Probe HMP155

Vaisala Background Luminance

Sensor LM21

Data communication options

10/100 Mbps Ethernet

RS-232, RS-485

Leased-line modem DXL421

UHF/VHF radio modem

Operating environment

IP rating

IP66

Operating temperature

−40 … +65 °C (−40 … +149 °F)

Operating temperature, extended

(optional)

−55 … +65 °C (−67 ... +149 °F)

Storage temperature

−55 … +65 °C (−67 ... +149 °F),

non‑condensing environment

Operating humidity

0 … 100 %RH

Wind speed

Up to 60 m/s (134 mph)

Compliance

EU directives

EMC, LVD, RoHS

Environmental

IEC 60068‑2‑1, 2, 6, 14, 30, 31, 52, 78

IEC 60529, VDA 621‑415

IEC/EN 63000

Eye safety

Class 1M IEC / EN 60825‑1:2014

Electrical safety

IEC/EN/UL/CSA 61010‑1

EMC compliance

EN 61326‑1, industrial environment

CISPR 32 / EN 55032, Class B

Published by Vaisala | B211744EN-G © Vaisala Oyj 2021

www.vaisala.com

All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners.

Any reproduction, transfer, distribution or storage of information contained in this document is strictly

prohibited. All specifications — technical included — are subject to change without notice.