INSTRUCTION MANUAL DAFM3
Contents
1. Uu g INSTRUCTION MANUAL Digital Air How Meter Fw LIke Ll K 1 800 547 5740 Fax 503 643 6322 www ueitest com email info ueitest com S Introduction The DAFM3 Anemometer Psychrometer meter is designed with 6 HVAC R must have parameters in one instrument These are included in a portable battery operated instrument for measuring Humidity Air temp Dew Point Wet Bulb Air Velocity and Air Volume The sensor is built into the remote fan and is specially protected by a twist cap While in operation open the cap for accurate temperature and humidity readings Features include Measures Air Velocity Temperature and Humidity e Calculate Wet Bulb Dew Point and Air Volume CFM CMM e Protective twist cap for temperature humidity sensor e 8 Point Average for Air Velocity e 60 Second Average for Air Volume e Total Volume from multiple outlets e Large LCD digital display e Professional remote vane e English Metric scales e Low battery indication e Fast response Microprocessor circuitry for reliability Auto Power Off selectable e Powered by 4 AAA batteries Features include e DAFM3 Anemometer Psychrometer Meter Remote Vane e Batteries 4 User manual e Hard carrying case Safety Notes Before using this meter read all safety information carefully In this manual the word WARNING is used to indicate conditions or actions that may pose physical hazards to the user The word CAUTION is2. electrical shock and personal injury this meter provides to the operator Perform only those maintenance tasks that you are qualified to do Cleaning Periodidly clean your meter s case using a damp cloth DO NOT use abrasive flammable liquids cleaning solvents or strong detergents as they may damage the finish impair safety or affect the reliability of the structurd components Battery Replacement Remove screw from battery compartment cover on back of meter and remove cover Replace battery with a fresh 9 Volt battery paying attention to polarity position Replace cover and screw Troubleshooting Power on but Press the power key more than 3 seconds Remove the battery and wait one minute Reinstall and try again The probe is not connected or damaged The value is underflow The value is overflow Out of meter display range The value is not calculated completely Humidity Calibration error a The original data that is relative to this m value has an error C A Specifications Temperature 4 to 140 F 20 to 60 C Accuracy 1 F 0 6 C Resolution 0 1 F 0 1 C Relative Humidity 0 to 100 RH Accuracy 3 at 10 to 60 RH 5 at other range Resolution 0 1 Dew Point 90 to 158 F 68 to 70 C Accuracy 3 at 10 to 60 RH 5 at other range Resolution 0 17 Wet Bulb 7 6 to 158 F 22 to 70 C Temperature Accuracy 3 at 10 to 60 RH 5 at other range Resolution 0 17 Air Ve
3. when ready The meter measures the volume for 60 seconds and calculates the aver age During this 60 second time the vane should be moved along the entire outlet area The count down timer displayed on the top left cor ner will show remaining time The meter beeps when 60 seconds are completed At the end of the 60 second countdown the meter will show the meas ured volume To measure additional outlets press the ENTER key to repeat the procedure This will return you to the area entrance screen for LW Total volume of all measurements is displayed by pressing the MIN MAX AVG key after completing the above test You can return to the last value measured by pressing the HOLD DOWN key With the last value displayed you can repeat the test for additional outlets adding to the total already measured Exiting the volume measurement mode will reset the total stored value Low Battery Two level battery indication Level 1 Battery indicator will flash at level 1 In this situation the meter will work normally however users should prepare to replace the batteries Level 2 Battery indicator will always display on the LCD In this level change batteries immediately DAFM3 MAN Maintenance Periodic Service AN nanna Repair and service of this instrument is to be performed by qualified personnel only Improper repair or service could result in physical degradation of the meter This could alter the protection from
4. for a service charge Return the unit postage paid and insured to 1 800 547 5740 FAX 503 643 6322 www ueitest com Email info ueitest com This warranty gives you specific legal rights You may also have other rights which vary from State to state PLEASE C9 RECYCLE Copyright 2008 UEi DAFM3 MAN 2 08
5. provided by manufacture in square inches for the Ak number CM Select these units for metric scales The temperature is C and velocity and volume are in meters per second and cubic meters per minute DAFM3 MAN Basic Measurement When you first turn the unit on the air temperature is the default value to show on the LCD To review the other basic parameters just press the MODE key Each parameter will be displayed in turn Parameters Measured will cycle through the following in order Dry Bulb Temperature Dew Point Temperature DP Wet Bulb Temperature WB e Relative Humidity RH e Air Velocity MIN MAX AVG All modes will capture the average AVG minimum MIN and maximum MAX value since the meter was powered on Select AVG MIN MAX by pressing this button Pressing MODE while displaying MIN MAX or AVG will scroll through available readings Each mode will also provide a choice of MIN MAX or AVG Velocity with Average The DAFM3 has the ability to capture up to eight values for velocity and then display the minimum maximum and average of these readings The maximum number of records is 8 points 1 Store readings while in the measurement mode by pressing RECORD up to 8 points of data 2 Press ENTER to view results NOTE REC H will display in the lower left of the display 3 Press MIN MAX AVG to cycle through the calculated values Air Volume N
6. when grill specifications are in square centimeters for free area DAFM3 MAN e Length and Width This ts the default choice when entering the volume mode and will start with entering the length You can determine that the meter is in this mode with the L in the lower left corner lt 8 gt W 4 NOTE To convert dimensions in inches to feet divide by 12 On the above image 8 length 12 667 Ft for L and 4 width 12 553 Ft for W Press the UP key to increase the value of the flashing digit Press the NEXT Dgt key to select the next digit You can cycle through all of the digits until the correct value has been entered Press ENTER when the correct length has been selected This will advance you to the width mode W in the lower left portion of the display Press the UP key to increase the value of the flashing digit and then NEXT Dgt to select the next digit After you have the correct value press ENTER to advance to the measurement mode for vol ume NOTE The meter will provide a 20 second countdown so you can posi tion the air vane near the grill or opening If you do not need the entire 20 seconds simply press START The meter will average the measurement over a 60 second time frame Continue to move the air vane across the entire area being measured to obtain the most accurate value The meter will beep at the end of the test and the display wil
7. ease digit during setup for volume e To view total of measured volume on multiple outlets 5 REC START In velocity mode pressing this key to store the current velocity reading into memory e To start measuring volume without waiting to finish countdown in Volume mode 6 HOLD NEXT Det In basic modes press this key to hold the current reading then press this key again to unlock the held reading e To select next digit during setup for volume e View last measured air volume Operating Instructions Disable Auto Power Off With the meter off press and hold MIN MAX then press and hold ON OFF until the meter beeps Selecting Units With the meter off press and hold the ON OFF button for more than two seconds The display will show only the units portion Use the UP or NEXT Dgt buttons to alternate between the avail able scales When the scale desired is showing press the ENTER but ton to save The units available are Ft in cm Ft Range Select these units to enter free area specification from grill manufacture Free Area is not a calculated area based on grill dimensions but accounts for the space between louvers It is often referred to as Ak or effective area The following figure represents these units INCH Select these units if measuring open ductwork and you wish to enter the length and width or diameter in inches It can also be used to enter specified grill free area
8. l hold the volume measured Press ENTER to repeat the volume test on additional registers or open ings The meter will return to the LW area enter mode but will retain the last entered values If measuring a round duct or specific grill press and hold ENTER to advance to the alternative area modes Diameter The second option is using diameter of the duct After entering the Volume Mode press and hold ENTER to advance to the diameter entrance mode You can confirm this by observing the D in the lower left area of the display Enter the correct value using the same method listed for Len gth and Width values 8 Diameter NOTE 8 diameter duct If entering diameter in Ft scale divide diameter by 12 8 12 667 feet P 3 Area While in diameter setting mode press the ENTER key for over two seconds to enter area setting Enter the specified grill free area obtain from the manufacture using the UP key to increase the value of the flashing digit and the NEXT Dgt key to move to the next digit Press ENTER after the correct value has been selected Air Volume Measurement After pressing ENTER to exit the size mode the meter waits 20 sec onds to provide time for you to put the vane up to the grill During the 20 second waiting time a countdown timer is displayed on top left cor ner The meter beeps when time is up To skip the 20 second count down press START
9. locity 0 3 to 35 m s 1 to 114 ft s Accuracy 5 Resolution 0 1 m s Air Volume 0 to 99999 m s 0 to 99999 cfm Accuracy 5 Resolution 0 1 0 9999 9 or 1 10000 99999 Power 1 9V Alkaline battery or M Siame Dimensions Meter 175 x 70 x 33 mm Vane 170 x 77 x 40 mm DAFM3 MAN DAFM3 Digital Air Flow Meter Limited Warranty The DAFM3 is warranted to be free from defects in materials and workmanship for a period of one year from the date of purchase If within the warranty period your instrument should become inoperative from such defects the unit will be repaired or replaced at UEi s option This warranty covers normal use and does not cover damage which occurs in shipment or failure which results from alteration tampering accident misuse abuse neglect or improper maintenance Batteries and consequential damage resulting from failed batteries are not covered by warranty 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 A purchase receipt or other proof of original purchase date will be required before warranty repairs will be rendered Instruments out of warra ntywill be repaired when repairable
10. or rectangular ductwork Diameter for circular ductwork b Use the manufacture value for effective or free area Ak 2 Hold the air vane in the air flow area and press START 3 Move the air vane slowly over the entire face or open area during the 60 second countdown 4 View the results after the meter emits a beep the end of the 60 second sample time To repeat this on additional registers press and hold ENTER to return to step 1 Additional outlets can be measured and then the total of all measure ments can be viewed After measuring the volume and while displaying the result press the Total Volume button It will list the number of tests in the upper left and the total volume Return to the results of the last test by pressing Last Volume Entering Free Area There are three methods to enter the area used to calculate volume The units also change the numbers that would be entered The three methods are Length and Width LW for rectangular ducts Diameter D for circular ducts and AREA to enter in the grills free area specification from the manufacture Units will determine what values are entered e Use IN for open grills and when manufacture specifications provide square inches for the effective area e Use Ft for Ak numbers provided in square feet NOTE LW and D inches can be converted to feet by dividing by 12 e Use the CM scale to obtain cubic meters per minute and
11. ote The DAFM3 will also calculate air volume for supply or return air flow The meter will measure velocity and then utilize the area entered to calculate volume The critical aspect of this function is to have the correct area There are three methods used to enter area but consider the following Dimensional outlet size can only be used on ductwork that does not have a grill over the opening The louvers and frame on the grill reduce the effective open area so that the space available for airflow is less than what the outside dimensions would calculate P 2 As an example a 12 x 12 grill would equal one square foot length x width 1 ftx 1 ft 1 sg foot but with the fins of the grill in that space it may only have an effective area of 0 5 square feet or less Grill manu factures perform testing to evaluate the effective area of a grill and con siders not only the space between the grill but the pressure created by the air flowing against these fins For the most accurate results please obtain the effective area or free area from the grill manufacture This is often listed as the Ak value Air Volume Measurement While in basic mode press MODE for over 2 seconds to enter volume measurement mode Press and hold MODE for more than 2 seconds to return to basic mode The steps to capture volume on open ductwork are the following 1 Enter the free area a Use dimensions for open ductwork e Length and width f
12. used to indicate conditions or actions that may damage this instrument A N CAUTION Objects striking the fan may damage meter LCD Display Functional Description 1 Rotate the protective cover in the center of the fan to open before measurement to ensure the measured data is correct CLOSED OPEN DAFM3 MAN 2 The fan and meter are sold as a kit and are calibrated to each other Please don t connect the fan with another DAFM3 or other similar anemo psychrometers because the characteristic of each fan is different Controls and Indicators 2 1 3 ON OFF MODE ENTER UNITS FLOW CFM LW D AREA 4 6 A MIN MAX REGORD HOLD AVG START NEXT DGT Total Volume Last Volume UE 1 ON OFF Turns ON the meter with auto sleep mode Turns OFF the meter at any mode NOTE When the meter is OFF press more than two seconds to enter UNITS selection 2 MODE Press to select different modes Temp DP WB RH Velocity Press and hold to select VOLUME function 3 ENTER To confirm the setting and calibration Press and hold to select the method to enter AREA for VOLUME Length Width LW for open rectangular duct Diameter D for open round ductwork and Area A to enter the specified grill free area Ak information NOTE Also used to recall values stored in memory for multi point average 4 MIN MAX AVG and UP Press to view Minimum Maximum and Average value e To incr
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