Vaisala FD12P - Manual (Page 26)

User's Guide _______________________________________________________________________
26 ______________________________________________________ M210296en-A
Capabilities and Limitations
Visibility Measurement
Specifications
Measurement range of Meteorological Optical Range (MOR):
- 10 ... 50 000 m according to a 5 % Contrast Threshold
Definition
Accuracy:
- ± 10 %, range 10 ... 10 000 m
- ± 20 %, range 10 000 ... 50 000 m
Instrument consistency:
- + 4 %
Update interval:
- 15 seconds
Weather Sensing Specifications
Precipitation detection sensitivity:
- 0.05 mm/h or less, within 10 minutes
Weather type identification:
- 11 different types of precipitation
- Fog (mist) and haze (smoke, sand)
Weather type reporting:
- WMO code table 4680 (with some additions from code table
4677)
- Code letters for precipitation, NWS
- WMO code table 4678 (supported codes are shown in Table
34 on page 145).