DAFM3 8 Button Manual ( pdf )
Contents
1. 1 800 547 5740 Fax 503 643 6322 www ueitest com email info ueitest com TABLE OF CONTENTS Operating Instructions Disable Auto Power Off 5 Velocity with Average 6 Air Volume Measurement 6 7 Entering Free Area i Air Volume Measurement 9 lowBatterya n nes 11 Maintenance Periodic Service reuasneeeeeene 12 Cleaning Battery Replacement ssssssscssssssssssssssseessesssssessesssnseesessssseesees 12 Troubleshooting scsccccsssssssssssssssecsssssssesssssssseesssssssessessssseeeees 13 Specifications Warranty and Service Information eussaeae 15 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 8 Point Average for Air Velocity 30 Second Average for Air Volume Total Volume from multiple outlets e Large LCD digital display Professional remote vane English Metric scales e Low battery indic2. screen should appear This is the first screen for the LW dimensions Note the tm m a E E Ft 2 Press LW D Area to advance to vol the diameter dimension entrance screen ri 7 N The icon in the lower left will now be a D to indicate this is now expecting IERSE I Diameter le a ft 3 Press LW D Area to advance to the area dimension entrance screen VOL The icon in the lower left will now be AREA to indicate this is now expecting m a i 1 m a w m Ft amp Note If when trying to advance from LW or D to AREA the ENTER key is pressed it will accept the displayed value in advance to the 20 second countdown If this is done in error turn the meter off and start the process at the beginning Entering Area Length Width After you decide if you will be using VOL a BD latices or peT 7 7 m 7 round duct or AREA Effective area of a grill Ak value you will need to III N enter the area The procedure below mm is for the LW entrance mode but is a ft amp the same for all three methods To enter the volume mode press and hold MODE until the unit beeps The previous screen will be appear This screen is used to enter length note small L in the lower left corner Changing Value Displayed One digit will be flashing Change this digit by pressing the Min Max button VOL the small triangle indicates increase
3. 12 x12 1 i sq inches we need to estimate the amount of area that is Converting to sq ft really open 144 sq inches 1 sq ft Below is an example of the steps needed to determine this area 10 gt On a grill the overall dimensions are not open or Free Area Entering dimensions on this would cause a large error For best results use the Ak specification from grill manufacturer If needed an estimation may be used for comparison First calculate the total free area of the grill then take a percentage of that to enter into the instrument On this 4x10 grill we had calculated the total area At 0 278 square feet If we estimate only 70 of the area is truly open the are would be 0 278 x 0 70 0 195 sq feet One estimation method would be to measure the area of the louvers and use length x width There will still be errors using this approach but in comparison analysis the error will be small Entering Information into the DAFM3 a A The first thing to notice is the keypad ON OFF MODE ENTER labels have two different items under PEN N most buttons The top line is the activity D that occurs on a short press of the button avam mmax Lw D AREA HOLD A Increase The second in brackets line is the activity that occurs on a long press This is key to EE understandi
4. is the function on the AVG MIN MAX button illustrated with the upward facing arrow F F RH RH RH m s ft m ft m M m cfm cfm cm inch Ft Select the scales desired and then press the Enter key This will enter the basic measurement mode Basic Measurement When you first turn the unit on the air velocity is the default value displayed on the LCD To review the other basic parameters press the MODE key Each parameter will be displayed in turn 5 Basic Measurement continued Parameters Measured will cycle through the following in order e Air Velocity Dry Bulb Temperature e Dew Point Temperature DP e Wet Bulb Temperature WB e Relative Humidity RH 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 78 points of data u 2 Press AVG Velocity to view l l results NOTE REC H will display i
5. register press ENTER briefly then move to the proper entrance method by pressing the LW D Area button The value last entered will be saved to reduce the time required to measure air volume on multiple outlets that have the same characteristics Diameter Enter diameter using the inch scale or divide diameter by 12 to convert inches to feet Free Area Enter value direct from grill engineering data provided by grill manufacture recommended Total Volume At the end of a test the Total Volume button can be pressed to display a total of all measurements made since entering this mode The display will show total volume with a number in the upper left corner of the display to indicate the number of air outlets that have been measured and that are being used for a total average volume To return to the last volume measurement press the Total Volume button again 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 Maintenance Periodic Service IN crises 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 electri
6. the area that the river was occupying we could determine the volume by measuring the average speed of the water flow and multiplying by the rivers area This would then give us the total volume of water flowing past a specific point Free Area Ak value for a grill Grills or registers all have an area associated with all of the openings Grill manufactures refer to this as free area or effective area They perform extensive testing to determine the total area that is open to air flow and is effectively free for the air to flow through Without this number it is difficult to determine airflow by measuring velocity but it can be estimated for comparison purposes What exactly is free area and how does it relate to airflow and registers or grills In open ductwork the free area is simply the open area of the duct For a rectangular grill this is determined by length times width A 12 by12 rectangular duct that is open has an area of 144 square inches length x width If we want this in square feet we can divide the result by 144 144 square inches in each square foot In this example the free area is one square foot A register example is 4 by 10 The area of this in square inches is 4 x 10 40 square inches Next convert that to square feet 1 j dividing by 144 results in 0 278 square feet lt gt This would give the total area if it were open 12 3 Area is length x width but because the grill covers a portion of this
7. UME function ENTER To confirm the setting and calibration NOTE Also used to recall values stored in memory for multi point average MIN MAX AVG and UP Press to view Minimum Maximum and Average value To increase digit during setup for volume LW D AREA Press to scroll through options for entering area 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 6 HOLD Press to hold the current reading then press this key again to unlock the held reading 7 REC START In velocity mode pressing this key to store the current velocity reading into memory To start measuring volume without waiting to finish countdown in Volume mode 8 AVG Velocity Total Volume next digit Press to display average of stored velocity in standard mode total volume in CFM mode Press a second time to return 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 the units This function is unique as it requires the process be started with the instrument off If you notice the On Off button has Units below This is a Press and Hold function Press this until a beep is heard and you will see one of the screens shown below You can scroll through these options while displayed by pressing the Up button This
8. Volume 0 to 99999 m s 0 to 99999 cfm Accuracy 5 Resolution 0 1 0 9999 9 or 1 10000 99999 1 9V Alkaline battery or 9V gt 200mA adapter a Meter 175 x 70 x 33 mm Vane 170x 77x40 mm 14 fm UEH DAFM3 TEST iNSTRUMENTS 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 warranty will be repaired when repairable for a service charge Return the unit postage paid and
9. ation e Fast response Microprocessor circuitry for reliability Auto Power Off selectable e Powered by 1 9V battery Material Supplied e DAFM3 Anemometer Psychrometer Meter e Remote Vane e Batteries 1 9V e User manual 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 is used to indicate conditions or actions that may damage this instrument Dean Objects striking the fan may damage meter IMPORTANT NOTE 1 Rotate the protective cover in the center of the fan to open before measurement to ensure the measured data is correct CLOSED OPEN 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 MODE ENTER FLOW CFM AVG MIN MAX LW D AREA HOLD A Increase Lz TEST A 3 RECORD AVG Velocity START Total Volume next digit 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 four seconds to enter UNITS selection MODE Press to select different modes Temp DP WB RH Velocity Press and hold until beep to select VOL
10. cal shock and personal injury this meter provides to the operator Perform only those maintenance tasks that you are qualified to do Cleaning Periodically 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 structural 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 BACK OF INSTRUMENT 12 Troubleshooting no display Remove the battery and wait one minute The value is underflow The value is overflow Out of meter display range The value is not calculated completely Humidity Calibration error EL The original data that is relative to this e A feo La 13 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 1 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 1 Air Velocity 0 3 to 35 m s 1 to 114 ft s Accuracy 5 Resolution 0 1 m s Air
11. 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 RECYCLE Copyright 2011 UEi DAFM3 MAN 6 11
12. m a or up When the digit is as desired II Il press the lower right button Next Dgt Il Il to move the flashing digit one position een ER gt mn BEE left You can repeatedly press this to Ft cycle through all of the digits if you u have incorrectly entered a value After the length is entered press Enter briefly This will accept the value displayed and move to the Width screen The screen is very similar to the length screen but has a W in the lower left Enter the Width in the same manner as you entered the length using the Min Max Up and Next Dgt buttons When complete you will press Enter briefly to accept this value The meter will now enter a 20 second 20 VOL countdown allowing you time to position the air vane in front of the 7 7 opening to be measured The screen Film shown here will be displayed Note If you wish to skip this wait period press the Record Start key WAIT After the 20 second countdown the meter will enter a 30 second average eG AVGVOL sample period The immediate air m volume is displayed as measurements Il are made with the meter displaying I i an average at the end of the 3 0 arm seconds During the sample time the START following screen will be displayed After the sample is complete the meter will display the average volume from your test area To continue on to the next
13. n l l the lower left of the display 3 Press MIN MAX AVG to REC cycle through the calculated values Measuring Air Flow volume with the UEi DAFM3 Air speed is the rate at which the airflow is moving past a specific point It is typically measured in feet per minute in our use but can be one of many different scales Aircraft measure in knots and weather forecasters will use miles per hour as examples 6 Measuring Air Flow continued Air volume is measured to determine the total amount of air going through an area in a given amount of time We are typically looking for cubic feet per minute CFM as it relates to heating or cooling equipment To determine this you must either direct all of the air through a known area or use an instrument to measure velocity that can calculate the CFM from the known area To understand we can compare to something more common Consider a small stream compared to a large river A river has a huge area but the water may be moving at a low speed while a stream may have a higher velocity but not be very big If measuring the velocity of the water only the stream would have a higher number Some large rivers move quite slowly but due to their size move a tremendous volume of water If we think about all of the small steams flowing into a river we could arrive at the volume of the river by adding all of the small streams velocity times their area volume Also if we knew
14. ng how to navigate through RECORD AVG Velocity the DAFM3 during use eee Advanced Measurement Mode Volume The DAFM3 can calculate the air volume and display the result after taking a 30 second average The DAFM3 only measures the velocity of the airflow so entering an area into the meter is critical This is also one of the most involved portions of the DAFM3 operation Note If the Enter key is pressed when trying to advance to D Diameter or AREA by accident the only method to recover is to power the meter off and then back on Selecting the method to enter area Use the following guide to determine the proper method 1 LW Length and Width Use for open square duct 2 D Diameter Use for open round duct 3 AREA Free Area Use when measuring at a grill For best results obtain the Ak or effective area from the grill manufacture If this is not available estimate based on the information listed earlier in this guide To access the desired mode for entering area first enter volume mode by pressing and holding the MODE button until it beeps Next scroll through the options by pressing the LW D Area button Icons in the lower left will indicate you what method of area is currently selected The steps are as follows VOL mn am rid L in the lower left corner indicating Il Length is expected B amp 1 Press and hold MODE to change to the volume CFM mode The below
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