Davis Instruments 7911 User Manual

1
Standard Anemometer
Installation Manual
The anemometer measures wind-related conditions such as wind speed, wind
direction, wind run, wind chill, and the temperature-humidity-sun-wind index.
It can be used with an EnvironMonitor Node to add wind data to an
EnvironMonitor system, as well as a replacement anemomter to your Davis
weather station.
Components
The anemometer includes the components listed below. Be sure you have all
listed components before continuing. Assess your installation and make sure
you have all necessary parts, tools, and materials pictured below before you
begin.
Wind Cups
A
nemometer
Base
Anemometer Arm
with 40 feet (12.2 meters)
of cable
Wind Vane
Hardware
The hardware kit contains the items
most commonly needed for the
installation of the anemometer.
Which items you use from the kit
depend on where you install your
unit. You may need to adapt or
purchase additional hardware to fit
your individual requirements.
Tools and Materials Needed
You will need the following tools
and m
aterials to install your
anemometer:
• Cable Clips or Weather-Resistant Cable Ties
Note: Make sure the clips or ties you use to secure the anemometer cable have screw holes or other
means for mounting the cable. Do not use metal staples to secure the cables.

Davis Instruments 7911 Specifications

Wind Direction

accuracy	±3°

Wind Speed

range	0 to 200 mph, 1 to 322 kph, 1 to 173 knots, 0.5 to 89 m/s
accuracy	±2 mph, ±3 kph, ±2 knots, ±1 m/s, ±5%

Summary

Anemometer Components

Anemometer Hardware

Tools and Materials for Installation

Testing the Anemometer Functionality

Anemometer Assembly Steps

Choosing the Best Anemometer Location

Location Guidelines

Recommendations for optimal placement to ensure unobstructed wind flow and accurate readings.

Orienting the Wind Vane

Anemometer Installation Procedures

Installation on Sensor Mounting Arm

Instructions for mounting the anemometer using a dedicated sensor arm.

Anemometer Base Orientation Check

Procedure to ensure correct alignment of the anemometer base before installation.

Base Installation on Wooden Post

Steps for securely attaching the anemometer base to a wooden post or surface.

Base Installation on Mast or Pipe

Guidance for mounting the anemometer base onto antenna masts or metal pipes.

Anemometer Installation Details

Installation on Larger Metal Pipe

Method for attaching the anemometer base to metal pipes exceeding 1.25 inches in diameter.

Attaching the Anemometer Arm to Base

Procedure for connecting the anemometer arm to the base unit.

Installing the Wind Vane

Securing the Anemometer Cable

Anemometer Maintenance

Troubleshooting Anemometer Issues

Zero or Dashed Wind Readings

Steps to diagnose and resolve issues with zero or intermittent wind speed/direction readings.

Inaccurate Wind Speed Readings

Guidance for addressing wind speed readings that are too high or too low.

Contacting Technical Support

Anemometer Specifications