HWA4214SD - General Tools And Instruments
Contents
1. Air flowing past the wire cools it The speed of the air flow can be calculated from the relationship between the metal s electrical resistance and temperature In the HWA4214SD the hot wire is located at the end of a telescoping probe where it is paired with a tiny glass bead thermistor that measures air temperature Compared to other types of anemometers hot wire anemometers have superior performance For this reason they are commonly used for precise measurement of low speed air flows turbulent flows or of any flow in which rapid velocity fluctuations are of interest Applications include e Environmental testing Maintenance and repair of air conveyors and flow hoods in clean rooms Measurement of air velocity produced by fans and blowers e Balancing velocity profiles in furnaces and refrigerated cases Operating paint spray booths The HWA4214SD comes with a telescoping air speed temperature probe 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 Temperatures can be displayed in oF Fahrenheit or oC Celsius units Several features and capabilities enhance the instrument s versatility Among them are automatic temperature compensation for measurements made by the telescoping probe or by Type K or J thermocouples the ability to hold readings and display maximum and minimum readings and an automatic power off function that2. at least five seconds until the word dAtE appears in the center of the display along with the flashing value 00 00 00 at the lower left above yy mm dd Set the current year by pressing the SET W or LOGGER A button repeatedly until the correct value appears above yy Quickly within three seconds press the REC ENTER button to store the setting The next screen that appears will have the value above mm flashing Use the SET W or LOGGER A button to navigate to the current month and press the REC ENTER button to store the setting When the next screen flashes the value above dd again use the SET W or LOGGER A button to navigate to the current day and press the REC ENTER button to store the setting If you press buttons too slowly in setup mode the screen will revert to the normal display To return to the setup sequence press and hold the SET W button again To move ahead to the next field in the sequence or to the next parameter press the FUNC HOLD NEXT button Once you have set the date the display will prompt you to set the hour minute and second of the current time Again use the SET W or LOGGER A buttons to navigate to the correct values and the REC ENTER button to store the settings 4 Choose a decimal point or comma to represent the decimal division between integers and fractions for example American style 20 88 vs European style 20 88 Once you have set the date and time the display will show the
3. memory cards of up to 16 GB capacity Auto power off function Powered by six AA batteries or optional 9V AC DC adapter OPERATING INSTRUCTIONS WHAT S IN THE CASE The HWA4214SD comes fully assembled in a hard carrying case along with a telescoping air speed temperature probe a 2 GB SD memory card and this user s manual Optional accessories available from General Tools amp Instruments include e Type K and Type J thermocouples A 9VDC adapter for a 110V power supply See the Optional Accessories section of this manual for more details Figure 1 shows all of the controls and indicators on the front right side back top and bottom of the HWA4214SD It also shows the main components of the included telescoping probe Familiarize yourself with the positions and functions of these controls indicators and connectors before moving on to the setup procedure 1 18 1 17 RIGHT BACK TELESCOPING SIDE PROBE Fig 1 The HWA4214SD s controls and indicators and other physical features 1 1 Liquid crystal display 1 10 RS 232 output jack 1 2 POWER ESC button 1 11 RESET button 1 3 FUNC HOLD NEXT button 1 12 Socket for 9VDC AC adapter 1 4 REC ENTER button 1 13 Battery compartment cover 1 5 SET W button 1 14 Battery compartment cover screws 1 6 LOGGER 4 button 1 15 Kickstand 1 7 Socket for combination air 1 16 Tripod attachment nut speed temperature probe 1 17 Telescoping probe plug 1 8 Socket for optional 1 18 Telescopin
4. mph 5 0 2 knots 5 20 ft min for temperature 1 5 F 0 8 C For air speed 0 01 m s 0 2 to 5 0 m s 0 1 m s 5 1 to 25 0 m s 0 01 km hr 0 7 to 18 km hr 0 1 km hr 18 to 72 km hr 0 01 mph 0 5 to 11 20 mph 0 1 mph 11 2 to 44 7 mph 0 01 knot 0 4 to 9 7 knots 0 1 knot 9 7 to 38 8 knots 1 ft min 40 to 3940 ft min for temperature 0 1 F or C Sampling time options Settable parameters Storable recallable readings 0 1 2 5 10 30 60 120 300 600 1800 or 3600 seconds 0 seconds to 1 hour Date time auto power off beep sound sampling time decimal point or comma decimal division temperature unit air speed unit optional thermocouple type K or J Maximum minimum SD card capacity 1 GB to 16 GB Operating temperature 32 to 122 F 0 to 50 C Operating relative humidity 0 to 85 Power supply Six Alkaline AA batteries or optional 9 VDC AC adapter Power consumption Dimensions of instrument Weight of instrument 30 mADC normal operation with backlight off and SD card not saving data 50 mADC with backlight on and card saving data 7 99 x 2 99 x 1 50 in 203 x 76 x 38mm 1 13 Ib 5159 Dimensions of probe 0 4724 in diameter x 11 02 in collapsed 37 in extended 12mm x 280mm 940mm MAINTENANCE amp TROUBLESHOOTING TIPS Keep the telescoping probe clean and move the sensor cover at its tip to the up position when not using
5. word bASIC above the phrase dEC Press the SET W button to make bASIC American style or Euro appear in the upper display as desired Press the REC ENTER button to store the selection as the default 5 Enable or disable auto power off Once the format of decimal point divisions has been set and stored the display will show the word yES over the term PoFF Press the SET Y button until the desired automatic power off management scheme yES for enable no for disable is displayed Press the REC ENTER button to store the selection If enabled the power off function shuts off the HWA4214SD after a period of inactivity of ten minutes 6 Enable or disable the beeper Once the auto power off function has been enabled or disabled the display will show the word yES over the word bEEP Press the SET Y button until the desired setting yES or no is displayed and then press the REC ENTER button to store the selection as the default 7 Select the thermocouple type Once the beep sound has been enabled or disabled the lower part of the display will show the term tYPE Press the SET W or LOGGER A button until your thermocouple s type K or J appears on the display Then press the REC ENTER button to store the selection 8 Select the temperature unit Once the thermocouple type has been selected and stored the lower part of the display will show the term t CF Press the SET W or LOG
6. GENERAL HWA4214SD USER S MANUAL HOT WIRE ANEMOMETER THERMOMETER WITH DATALOGGING SD CARD Please read this manual carefully and thoroughly before using this product TABLE OF CONTENTS Introduction cir 3 Key Features 2 ee 4 Operating Instructions 4 10 What s in the Case 4 5 Seip ara ana anal ni nen nun an 6 7 Normal Operation 8 9 Holding and Storing Measurements 9 Automatic vs Manual Datalogging 9 10 Transferring Data from the SD Card to a Computer L Lsiesse 10 Specifications N ENTER 11 Maintenance amp Troubleshooting Tips 12 Optional AccessorieS 0 o0ooooo oo 12 Warranty Information 12 Return for Repair Policy 13 INTRODUCTION Thank you for purchasing General Tools amp Instruments HWA4214SD Hot Wire Anemometer Thermometer with Datalogging SD Card Please read this user s manual carefully and thoroughly before using the instrument The HWA4214SD is a general purpose handheld instrument that can make two kinds of measurements Air wind speed and temperature simultaneously e Surface temperature as measured by an optional Type K or Type J thermocouple All hot wire anemometers including the HWA4214SD have at their heart a very thin metal wire that the instrument electrically heats up above ambient temperature
7. GER 4 button until the unit you prefer F for Fahrenheit C for Celsius is displayed Then press the REC ENTER button to store the selection as the default 9 Set the datalogging sampling time Once the default temperature unit has been set and stored the display will show a value above the letters SP t Press the SET W or LOGGER 4 button to decrease or increase the value until the desired sampling time appears above SP t The options are 0 1 2 5 10 30 60 120 300 600 1800 and 3600 seconds 0 seconds to 1 hour 10 Format the SD card Once the sampling time has been set and stored the term Sd F will appear in the lower half of the display Press the REC ENTER button Pressing the REC ENTER button causes the word no or yES to appear over the term Sd F Press the W button to make a selection Choose yES whenever a new SD card is being used or when a used card is being repurposed from use with another SD card instrument or a camera for example and all data on it is to be erased Choose no to preserve any data on a card previously used with this instrument If you choose yES after you press the REC ENTER button the instrument will prompt you to confirm that decision by displaying the term Ent below yES and sounding three beeps To confirm that you want to begin the erasure formatting procedure press the REC ENTER button Ent will then flash several times and t
8. e seconds until the term REC disappears from the top line of the display The display will then revert to showing the current reading AUTOMATIC VS MANUAL DATALOGGING The HWA4214SD can automatically log data at a user selected sampling period from 1 second 3 600 seconds one hour To view the sampling time that the instrument has been set up to use press the LOGGER A button which has the words Sampling check stenciled below it once To change the sampling time perform Step 9 of the setup procedure 1 To start automatic datalogging press the REC ENTER button once The top line of the display will then show the term REC Pressing the LOGGER A button at this point will make REC flash and add the flashing term LOGGER at the top right of the display This indicates that the instrument is currently storing measured values and their time stamps in memory 2 To pause automatic datalogging press the LOGGER A button once this action makes the flashing term LOGGER disappear from the top right of the display and changes the term REC from flashing to constant Pressing the LOGGER 4 button again resumes automatic datalogging 3 To end automatic datalogging press the REC ENTER button and hold it for at least two seconds This action causes the REC message to disappear 4 To log data manually set the sampling time to zero using the procedure detailed earlier Then press the REC ENTER button once The disp
9. e J thermocouple press the SET W button to enter the setup procedure and perform Step 7 Whenever the instrument is operating in measurement mode you can turn off the backlight which is on by default by briefly pressing but not holding the POWER ESC button To reactivate the backlight briefly press the button again 8 Whenever the HWA4214SD is in either measurement mode you also can check the current date and time by briefly pressing the SET W button which has the words Time check stenciled below it Doing so causes both values to appear briefly at the lower left of the display HOLDING AND STORING MEASUREMENTS 1 To hold a measured value press the FUNC HOLD NEXT button during the measurement Doing so will cause the word HOLD to appear at the top of the display Pressing the FUNC HOLD NEXT button again releases the hold 2 To record and recall readings press the REC ENTER button while making measurements This will make the term REC appear at the top of the display Pressing the REC ENTER button again briefly will make the term MAX appear to the right of REC and switch the display to the maximum value stored in memory during the last recording session Pressing the REC ENTER button again briefly will make the term MIN appear to the right of REC and switch the display to the minimum value stored during the last session 3 To exit recording mode press the REC ENTER button and hold it for at least thre
10. ermines it to be defective in material or workmanship This warranty does not apply to damages that General determines to be from an attempted repair by non authorized personnel or misuse alterations normal wear and tear or accidental damage The defective unit must be returned to General Tools amp Instruments or to a General authorized service center freight prepaid and insured Acceptance of the exclusive repair and replacement remedies described herein is a condition of the contract for purchase of this product In no event shall General be liable for any incidental special consequential or punitive damages or for any cost attorneys fees expenses or losses alleged to be a consequence of any damage due to failure of or defect in any product including but not limited to any claims for loss of profits RETURN FOR REPAIR POLICY Every effort has been made to provide you with a reliable product of superior quality However in the event your instrument requires repair please contact our Customer Service to obtain an RGA Return Goods Authorization number before forwarding the unit via prepaid freight to the attention of our Service Center at this address General Tools amp Instruments 80 White Street New York NY 10013 212 431 6100 Remember to include a copy of your proof of purchase your return address and your phone number and or e mail address NOTES NOTES Specialty Tools amp Instruments GENERAL TOOLS a
11. extends battery life Because it is microprocessor based the HWA4214SD 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 storing and time stamping 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 HWA4214SD has a backlit 2 5 in diagonal display and is powered by six AA Alkaline batteries or an optional 9 VDC AC adapter KEY FEATURES e Includes telescoping air speed temperature probe Displays air wind speed in meters second feet per minute kilometers hr knots nautical miles per hour or miles per hour Measures air speeds down to 0 2 m s with 0 01 m s resolution down to 40 ft min with 1 ft min resolution Displays temperature in F or C Big 2 5 in diagonal front panel green backlit LCD is easy to read Displays maximum and minimum readings and holds any reading Automatically logs measurements at sampling time settable from one second to one hour Also supports manual datalogging and changing of SD card storage location e Outputs Excel compatible data logs Accepts SD
12. g probe handle Type K or J thermocouple 1 19 Telescoping probe sensing head cover 1 9 SD card socket ping p g SETUP 1 Choose the power source Before using the HWA4214SD make sure it is powered by fresh batteries or an optional 9VDC AC adapter plugged into the bottom jack on its right side callout 1 12 To remove the battery compartment cover callout 1 13 remove the two screws holding it in place callout 1 14 Then install six AA batteries in the correct orientation using the polarity marks on the inside of the compartment as a guide Replace the cover by replacing the two screws 2 Install an SD card To prepare for setup also install an optional SD memory card of 1 GB to 16 GB capacity in the socket on the bottom of the instrument callout 1 9 When installing the card make sure its gold contacts are facing front and push the card into the socket until you hear a click To remove the card push it in until you hear a click and the card pops out Now power on the instrument by pressing the POWER ESC button callout 1 2 to generate a short beep To power off the HWA4214SD press the POWER ESC button and hold it until the instrument responds with a long beep When the instrument powers on a series of transient startup screens will briefly appear Once the display has stabilized perform the following eight setup steps in the order presented 3 Set the date and time Press the SET W button callout 1 5 and hold it for
13. he instrument will sound another three beeps to confirm that the SD card has been erased and formatted Once the SD card has been set up the display will then either return to the first of the eight steps in the setup sequence setting the current date and time or show the term ESC If ESC appears press the POWER ESC button to exit the setup procedure and enter normal operating mode NORMAL OPERATION 1 To prepare to make measurements power on the HWA4214SD and make sure an SD card is firmly seated in the socket on the bottom of the instrument The meter can make and display two kinds of measurements e Air speed and temperature simultaneously e Surface temperature as measured by an optional Type K or Type J thermocouple 2 To select the measurement mode use the FUNC HOLD NEXT button Pressing the button repeatedly toggles between the two modes When the FUNC HOLD NEXT button is released the selected mode becomes the default until the button is pressed again By default the HWA4214SD uses Celsius units for temperature measurements If you wish to make Fahrenheit units the default press the SET W button to enter the setup procedure and perform Step 8 3 To measure air velocity and temperature simultaneously a Seat the telescoping probe plug callout 1 17 of Fig 1 in its socket callout 1 7 on the top of the instrument b Press the FUNC HOLD NEXT button until the display shows the term Air c Holding the
14. it mes ISI 225 org TRANSFERRING DATA 4 3 20068 151218 21 mis 282 AM Tung E 5 4 200968 15 12 19 29 m s 28 9 AMTemp C m EE m EE 8 Dr lalz 3b mvs 23 AMTemp C After automatic or manual El Ba a Een datalogging of measurements uem EE a 2 15 iz 2009 5 Asa 3ms HS ieee remove the SD card from the Si Rome sie Mims TANT 3 Fans 16 15 20095 15 12 30 59 m s 29 1 AMTemp C instrument and plug it into your i HM mue ieee 1204 NR computer either directly if it has ipM ADAM BE e Ss an SD card slot or through an re de AN SD card reader a 3 we DM uam Bee Because the files containing time Fig 2 Typical Excel data only screen stamped data logs have the file l extension xls they open in 5 AM Microsoft s Excel application ji o Figures 2 and 3 show two kinds IE of Excel presentations a data only A screen and a graphics only screen E EEE Sort PP SPRL PLLA LM MPI RP be POPP PS PS EP PE PE STS ES SPECIFICATIONS Embedded microcontroller Custom one chip LSI device Display type Display size Liquid crystal with green backlight 2 05 x 1 5 in 52 x 38mm Parameters measured Air speed temperature Measurement range Measurement accuracy Measurement resolution For temperature 32 to 122 F 0 to 50 C for air speed 0 2 to 25 m sec 0 7 to 172 km hr 0 5 to 44 7 mph 0 4 to 38 8 knots 40 to 3940 ft min For air speed 5 0 1 m sec 5 0 3 km hr 5 0 2
15. lay will show the term REC on the top line a value in the middle and below it the letter P on the left and a number from 1 to 99 on the same line to the right The number indicates the position on the SD card that will be used to store manually logged data Now press the LOGGER A button This will cause the beeper to sound and the term LOGGER to briefly appear at the upper right of the display As in automatic datalogging mode in this mode the instrument is storing measurements and their time stamps on the SD card In manual datalogging mode however measurements are being stored continuously with a sampling time of zero and their locations on the card can be changed 5 To change the storage location of manually logged data press the SET W button once this causes the P to disappear from the left side of the display and the value on its line to begin flashing Once the flashing begins you can use the SET W and LOGGER A buttons to change the flashing value to any number between 1 and 99 Once you have chosen the storage location press the REC ENTER button to save the setting This causes the value to stop flashing and the P to return 6 To end manual datalogging press the REC ENTER button and hold it for at least three seconds This action causes the REC message to disappear from the top line of the display GH h Le m4 8 t D E r 4 1 I l Hace Date Time Value Unit Value Un
16. mp INSTRUMENTS 80 White Street New York NY 10013 3567 PHONE 212 431 6100 FAX 212 431 6499 TOLL FREE 800 697 8665 e mail sales generaltools com www generaltools com HWA4214SD User s Manual Specifications subject to change without notice 2010 GENERAL TOOLS amp INSTRUMENTS NOTICE WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS MAN HWA4214SD 6 9 11
17. probe by its handle slide the sensor cover callout 1 19 on its end down to expose the sensor Do not touch the sensor with tools or your fingers the thin hot wire and thermistor inside it are easily damaged d Extend the probe to a convenient length e Rotate the probe until the mark on top of the sensor head faces the wind or the flow of air whose speed temperature you wish to measure The upper part of the display will show the air speed while the lower part will show the temperature as or or oc To change the unit of air speed use the REC ENTER button which has the word Unit stenciled below it Repeated presses of the button cycle through the five options for air speed units m s meters second fpm feet per minute km h kilometers hr knots nautical miles per hour and mph miles per hour Release the REC ENTER button when the unit you wish to use appears making it the default until changed 4 To measure surface temperature using a thermocouple make sure the multi function probe is not in its socket Plug an optional Type K or Type J thermocouple into its dedicated socket callout 1 8 of Fig 1 Then press the FUNC HOLD NEXT button until the display shows the term tP Touch the wire end of the thermocouple to the surface whose temperature you wish to measure The display will show its temperature as F or C By default the HWA4214SD is configured for a Type K thermocouple To use a Typ
18. the probe Store the probe in the carrying case when you are not using the anemometer When the icon dX appears in the left corner of the display it s time to replace the six AA batteries that power the instrument although measurements will remain valid for several hours after the low battery indicator first appears Replacing the batteries requires removing the two screws that hold the battery compartment cover in place as explained in Step 1 of the Setup procedure After inserting fresh batteries in the correct orientation tighten the screws to secure the cover If the meter freezes like a computer and buttons become unresponsive try resetting the instrument by pushing the RESET button on its right side callout 1 11 of Fig 1 with the end of a paper clip Remove the batteries when storing the meter for an extended period of time Do not drop or disassemble the meter or immerse it in water OPTIONAL ACCESSORIES Optional accessories available from General Tools amp Instruments include Type K and Type J thermocouples e 9VDC adapter for a 110V power supply WARRANTY INFORMATION General Tools amp Instruments General s HWA4214SD Hot Wire Anemometer Thermometer with Datalogging SD Card is warranted to the original purchaser to be free from defects in material and workmanship for a period of one year Subject to certain restrictions General will repair or replace this instrument if after examination the company det
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