Introduction - General DLAF930S User Manual

INTRODUCTION

Thank you for purchasing General Tools & Instruments' DLAF930SD Environment
Meter with Datalogging SD Card. Please read this user's manual carefully and
thoroughly before using the instrument.
The DLAF930SD is a general-purpose handheld instrument that can make five kinds
of measurements:
• Air (wind) speed and temperature (simultaneously)
• Air temperature and humidity (simultaneously)
• Light level
• Surface temperature, as measured by an optional Type K or Type J
thermocouple
• Sound level (using an optional sound level probe and plug adapter)
The meter comes with a multi-function probe that is used to make the first three
types of measurement. Measurements of surface temperature and sound level are
made using optional accessories. Air speeds can be displayed in m/s
(meters/second), fpm (feet per minute), km/h (kilometers/hr), knots (nautical
miles per hour), or mph (miles per hour). Light levels can be displayed in lux
or ft-cd (foot-candles). Temperatures can be displayed in ºF (Fahrenheit) or
ºC (Celsius) units.
Several features and capabilities enhance the meter's versatility. Among them are
automatic temperature compensation for measurements made by the anemometer
or a Type K or Type J thermocouples, the ability to hold readings and display
maximum and minimum readings, and an automatic power off function that extends
battery life.
Because it is microprocessor-based, the DLAF930SD can make full use of the
portability, reliability and large storage capacities that SD memory cards offer.
Measurements can be made automatically at any sampling rate between one second
and one hour. After time-stamping and storing the measurements on an SD card
plugged into the instrument (a process called datalogging), the user can remove the
card and plug it into to a laptop or desktop computer either directly or via a USB card
reader. The data logs are stored on the card as files with the .xls extension, which
can be opened by Microsoft's Excel application.
The DLAF930SD has a backlit 2-1/2 in. diagonal display and is powered by six "AA"
Alkaline batteries or an optional 9-VDC AC adapter.
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