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Summary of Contents for UEi H26-475
- Page 1 DAFM3B Digital Air Flow Meter INSTRUCTION MANUAL ENGLISH DAFM3B 1-800-547-5740 • Fax: (503) 643-6322 www.ueitest.com • email: info@ueitest.com...
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Page 3: Table Of Contents
TABLE OF CONTENTS Introduction ....................3 Safety ......................3 Controls and Indicators ................4 Figures and Components ................5 Operating Instructions Disable Auto Power Off ..............5 Selecting Units..................5 Basic Measurement ..............5-6 Measuring Air Volume (CFM or CMM) Entering Duct Information ..............6 Timed Average Air Volume ...............7 Estimating FREE AREA (Effective area) of a Grill ........8 Maintenance Low Battery ..................9... -
Page 4: Introduction
INTRODUCTION The DAFM3B Anemometer/Psychrometer is designed with 6 HVAC/R parameters in one instrument. These are included in a portable, battery- operated instrument for measuring humidity, air temperature, dew point, wet bulb, air velocity and air volume. The vane probe includes sensors for velocity, temperature and humidity. -
Page 5: Controls And Indicators
CONTROLS AND INDICATORS MODE HOLD START/ STOP EXIT LW-D-AREA MAX / MIN [ HOLD TO EXIT AVG MODE] ON / OFF (SET) 1. On/Off (Setup): Press briefly to power meter on. Press and hold to turn the meter off. • Note: When the meter is OFF, press more than two seconds to enter SETUP mode. -
Page 6: Figures And Components
FIGURES AND COMPONENTS OPERATING INSTRUCTIONS DISABLE AUTO POWER OFF With the meter off, press and hold ON/OFF and HOLD for more than two seconds. The display will show an “n” indicating that auto power off is disabled. SELECTING UNITS • With the meter off press and hold ON/OFF (Set) button for more than two seconds. -
Page 7: Measuring Air Volume (Cfm Or Cmm)
OPERATING INSTRUCTIONS CONT. • VOL – Air volume in CFM or CMM, based on dimensions entered Note: Icon at bottom of screen will indicate the method used to calculate volume (LW-Length/Width, D-Diameter, A – Area). • TA – Ambient Temperature measured at the probe tip •... -
Page 8: Timed Average Air Volume
MEASURING AIR VOLUME (CFM OR CMM) CONT. TIMED AVERAGE AIR VOLUME 1. Press MODE until VOL is showing in the upper right corner of the display 2. Enter duct dimensions using the method described prior section 3. Place the probe at the face of the opening, or on the grill surface 4. -
Page 9: Estimating Free Area (Effective Area) Of A Grill
ESTIMATING FREE AREA (EFFECTIVE AREA) OF A GRILL To obtain air volume on a grill with unknown effective or free area you must estimate the free area. This is difficult, but can be used to provide an estimate of the volume for comparison testing. If multiple grills of the same design are compared using this method, you will have an accurate relative comparison, although the actual value may not be exact. -
Page 10: Maintenance
MAINTENANCE LOW BATTERY When the low battery “ ” icon appears on the display, all readings will change to “ “ to prevent inaccurate results. Change the 9V battery located in the inner compartment on the rear of the instrument. CLEANING Periodically clean your meters case using a damp cloth (not wet) only. -
Page 11: Specifications
SPECIFICATIONS: English Metric Air velocity range 99 ~ 3937 ft/min 0.5 ~ 20 m/s Air velocity resolution 0.1 ft/min 0.1 m/s Air velocity accuracy ±5% ±5% Temperature range -4 ~ 140°F -20 ~ 60°C Temperature resolution 0.1°F 0.1°C Temperature accuracy ±1˚F ±0.6˚C RH% range... -
Page 12: Warranty And Service Information
Any implied warranties, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited to the express warranty. UEi shall not be liable for loss of use of the instrument or other incidental or consequential damages, expenses, or economic loss, or for any claim or claims for such damage, expenses or economic loss.
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