Extech Instruments AN340 User Manual page 2

Introduction
Thank you for selecting the Extech AN340 CMM/CFM Anemometer Psychrometer Datalogger. This
instrument measures Air Velocity, Air Flow (volume), Air Temperature, Relative Humidity, Wet Bulb
Temperature, and Dew Point Temperature.
The meter's compact mini impeller is perfect for duct airflow measurements. The sensor probe has
an 18mm (0.7") diameter and a 1M (39") telescoping probe wand with a marked scale. Duct
temperature does not affect the airflow measurement results. Temperature and humidity sensors
are built into the vane sensor.
The user can manually store and recall 99 readings directly on the meter's LCD. The user can also
automatically log up to 12,000 readings with date and time stamp and selectable sampling rate.
Readings are transferred to a PC using the supplied PC software and USB connector cable.
This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable
service. Please visit our website (www.extech.com) to check for the latest version of this User
Guide, Product Updates, and Customer Support.
CAUTIONS

Improper use of this meter can cause damage to the meter and personal injury. Read and
understand this user manual before operating the meter.

Inspect the condition of the probe and the meter for any damage before operating the
meter. Repair or replace damage before use.

If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.

This device should not be made available to children. It contains hazardous objects as well
as small parts that can be accidentally swallowed. The meter's batteries and packing
materials can also be dangerous to children.

In the event that the meter is to be unused for an extended period of time, remove the
batteries to protect against battery leakage.

Expired or damaged batteries can be hazardous if allowed to come in contact with skin. Use
suitable hand protection in such cases.

Do not short circuit batteries or put batteries in fire.
Shop for Data Logging products online at:
2
DataLoggerStore
www.
AN340-EU-EN V1.3 4/13
1.877.766.5412
.com