Vaisala FOC201 - User Manual

Improving Weather Station Grounding
You can improve the grounding of Vaisala weather stations to make the weather station less
susceptible to damages caused by lightning.
While visiting the site, check also that the enclosure and sensor cables have been grounded according
to the instructions.
For more detailed information on grounding, see Grounding and Lightning Protection in Vaisala
Outdoor Installations Technical Reference.
More Information
‣
Improving Grounding of Stainless Steel Flanges (page 2)
‣
Improving Grounding of Rubber Flanges (page 5)
‣
Checking Weather Station Grounding (page 6)
M212202EN-A
Technical Note
Improving Weather Station Grounding
AWS310, AWS310‑SITE, AWS430, FOC201, RME111
PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21
FI-01670 Vantaa, Finland
Phone:+358 9 8949 1
© Vaisala 2018
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.

Summary

Improving Weather Station Grounding

Improving Grounding of Stainless Steel Flanges

Steps to improve grounding using stainless steel flanges.

Improving Grounding of Rubber Flanges

Steps to improve grounding using rubber flanges.

Checking Weather Station Grounding

Procedures for verifying weather station grounding.

Checking Sensor Cabling and Grounding

Methods for checking sensor cables and their grounding.

Vaisala FOC201 Specifications

General

Measurement Technology	Forward scatter
Operating Temperature	-40...+60 °C
Measurement Range (Relative Humidity)	0...100 %RH
Protection Class	IP66
Accuracy (Wind Direction)	±3 ° at wind speed > 3 m/s
Output	RS-485, SDI-12
Parameters Measured	Visibility, wind speed, wind direction, temperature, pressure
Power Supply (RH sensor)	10...30 VDC
Material	Aluminum
Accuracy (Visibility)	±10 % (10...10, 000 m), ±20 % (10, 000...50, 000 m)
Accuracy (Wind Speed)	±0.3 m/s or ±3 % (0...50 m/s)