Airflow Model UA30
Contents
1. for rectangular ducts L1 width and L2 height for oval ducts d1 major axis dimension and d2 minor axis dimension The instrument will then display the computed duct area with the units above the top left hand corner of the computed area and a letter A flashing in the top left hand corner of the display 4 If the displayed area value is acceptable press the key The A will stop flashing and the instrument after a delay will return to its normal read store mode If the duct area is required to be changed then press the key The letter A will stop flashing to indicate that a new value of area may be entered Key in the new value of the duct area including any decimal points then press the area 1 key and the instrument will return to its normal read mode store 5 6 2 Programming a duct area by entering the linear dimensions of the duct indirect 1 Power the instrument up see section 5 1 2 Select the units for volumetric flow measurement either m s or ft min by pressing the key until the selected units are displayed beneath the analogue scale 10 3 Press the key Either the m or ft annunciator will be displayed depending upon the volume flow units selected The instrument response will depend upon how it was previously programmed as follows a area Instrument previously programmed directly with an area The 1 instrument will display the previously programme2. UA30 Anemometer Head Assembly Plastic 72427801 Battery cover 82372601 Mini DIN Socket Cap 82345201 13 OPTIONAL EXTRAS Description Part No Battery eliminator fitted with 3 pin UK power plug 9020897 fitted with 2 pin European power plug 9020855 APU 10 Mini printer battery powered supplied with RS 232 cable UK European version 72313301 USA version 72313302 UA30 APU 10 printer cable UK European version 72329605 USA version 72329606 UA30 PC or typical printer cable terminating in a 9 way D plug 72329601 terminating in a 9 way D socket 72329602 terminating in a 25 way D plug 72329603 terminating in a 25 way D socket 72329604 Mini DIN 8 pin plug 9040180 The statements and opinions contained in this document are made in good faith Whilst every effort has been made to provide reliable information Airflow Developments do not hold themselves responsible for possible errors of an editorial or other nature however caused Should you require a more detailed specification for a product described herein please contact our Sales department In view of our continuous programme of improvement we reserve the right to change the specification for any model or item described in this publication AIRFLOW QUALITY ASSURED TO ISO 9001 Airflow Developments Limited Lancaster Road Arow deel Omo Postec boat D339 Phebe h Gema irflow Lufttechnik GmbH Postfac D in Cressex Business Park High Wycombe Telefon 02226 9205
3. 1 From read mode select recall mode by pressing the key read 7 RECALL MEMORY will be displayed above the memory counter reading and the instrument will display the readings from memory location 01 onwards 2 Index the memory counter to the required location by means of the f A Jana M keys 6 gt 14 3 Press the Brint key to obtain the required printout of velocity volume flow temperature and turbulence in the 8 selected measurement units recall 4 Press the ey to revert back to the normal read mode read 7 5 8 3 Printing a complete set of stored readings valid in recall mode only 1 From read mode select recall mode by pressing the recall key The instrument will display the readings from memory location 01 T read 7 2 Double press the key to obtain the printout of velocity volume flow and temperature in the selected Prin 3 measurement units for all the stored readings Note turbulence values are not printed out in this mode but can be obtained by single value print out See 5 8 2 above recall 3 Press the key to return to the normal read mode read 7 5 8 4 Printing a sequential block of stored readings valid in recall mode only 1 From read mode select recall mode by pressing the recall read 7 The instrument will display the readings from memory location 01 2 Use the key to select t
4. 10 3 5 Fig 2 UA Instrument Item 3 4 Probe over range check This is a red LED which will illuminate if the measured air velocity or temperature exceeds the pre selected range This red LED also briefly flashes on switch on Item 3 5 Battery cover This slides and snaps in at the underside of the case Item 3 6 Wrist strap Item 3 7 3 5mm 3 pole jack socket for analogue outputs of Air Flow and Temperature see section 6 Item 3 8 2 5mm jack socket for connection of battery eliminator Item 3 9 8 pin mini DIN socket for connection of the Ultrasonic Anemometer head Item 3 10 8 pin mini DIN socket RS232 port for connection of printer This connector MUST be fitted with the supplied socket cap item 3 11 whenever a printer is not connected in order to fully comply with EMC requirements Item 3 11 Mini DIN socket cap to protect the RS232 port item 3 10 when not in use 3 2 ULTRASONIC HEAD refer to diagram Fig 3 The 8 pin mini DIN plug connects to its mating socket on the top of handheld instrument item 3 9 shown on Fig 2 Ensure that the pins are correctly aligned with the socket pins before inserting BB iy HINID huua am ae Fig 3 Ultrasonic head 4 KEYPAD FUNCTIONS 3 a TN display memor power Press to turn the instrument power on The instrument will remain n y y F on on until either the key is pressed
5. data held in memory valid in recall mode only 1 From read mode enter recall mode by pressing the The instrument will display RECALL MEMORY 1 in the bottom RH corner of the display and will display the data held in memory location 1 2 Index through the memory locations using the P keys Holding down either of these key EO A will scroll either up or down through the 9 C sa memory locations The instrument will display the data held in each location s 3 At any memory location press the key and the A ey to index through all the different units of Fad measurement The instrument will display the data in the units selected recall flow 4 Press the key to revert bad units Irmal read mode 0 read 7 5 7 6 The display of Average maximum and minimum values of data held in memory valid in recall mode only 1 From read mode enter recall mode by pressing the recall key read 7 The instrument will display RECALL MEMORY 1 in the bottom RH corner and will display the data held in memory location 1 2 Press the avg key The instrument will display the following max mins Top RH corner TEMP AVG VEL Main bottom display The average of the sto elocity or volume flow readings depending upon the ed selection of the flow key units A Bottom RH corner Number of readings stored Top LH corner The average of the stored
6. flow turbulence can be logged to memory either manually or automatically at a preset time interval Note 1 If the memory has not been cleared see section 5 7 4 data will be sent to the next available memory location Note 2 All flow data is stored as a velocity The instrument will compute Volume Flow using the programmed area and will display volume flow in the selected units Note 3 The memory will store a maximum of 99 sets of temperature turbulence velocity readings when this occurs MEMORY FULL will be displayed above the memory counter reading 5 7 1 Manual logging of readings to memory Press the key when a reading is to be logged to memory Note that the memory counter in the store bottom RH corner of the display increments each time a reading is stored 5 7 2 Automatic logging of readings to memory Readings may be sequentially stored into memory at a preset time interval The set between a minimum of 1 second and a maximum of 99minutes 59 seconds as follows Note Do not set below 5 seconds when logging to a Seiko Printer 1 In read mode double press the key The instrument will display four digits representing the sequence time interval may be auto logging time in minutes and seconds The first left hand digit will be flashing 2 Either a If the displayed time interval is acceptable press the key The word PRINTING and four dashes will momentarily appear on the display followe
7. max flashing in the top RH corner of the display The lowest memory location is initially displayed the other locations may be viewed by using the and F keys uj O 5 8 PRINTING Airflow can provide a compatible mini printer and cable please contact Airflow Sales Department for details 1 Attach the printer to the RS232 socket see Fig 2 item 3 10 page 3 ensuring that the plug is orientated correctly Set the printer to the following transmission protocol 19200 Baud rate 8 bit no parity 2 stop bits this allows compatibility with printers that expect either 1 or 2 stop bits 2 Turn on the printer 5 8 1 5 7 2 5 8 2 Printing a single stored reading valid in recall Note during the time that the printer is actually printing the keypad will be disabled and key presses will not be recognised Printing in read mode When a printout of a reading is required press the Pont key The word PRINTING will appear at the top of the display and the current temperature flow rate and flow turbulence readings will be printed in the units currently selected Auto Printing Readings may be sequentially printed at a presettable time interval by following the procedure detailed in section The printout will continue until stopped by following the procedure detailed in section 5 7 3 Note in this mode with the memory full the UA30 will still continue to output values to the printer recall
8. maximum of either 997 s or 999 inches Inch dimensions are then converted to feet by the instrument for subsequent display and computation 3 Ifan area is input outside of these limits the overrange LED will illuminate the display will flash and will then display the previously entered value i e the out of range value will not be accepted Examples For a dimension of 7ft 9 s inches use the decimal keypad to key in 7 9 5 For a dimension of 23 inches use the decimal keypad to key in 2 3 9 4 note z 5 6 1 Programming a known duct area directly 1 Power the instrument up see section 5 1 2 Select the units for volumetric flow measurement either m s or ft min by pressing the key until the selected units are displayed beneath the analogue scale flow i 7 3 units le key Either the m or ft annunciator will be displayed depending upon volume flow units area selected 1 The instrument response will depend upon how it was previously programmed as follows a Instrument previously programmed directly with an area The instrument will display the previously programmed duct area with a flashing A in the top LH corner of the display b Instrument previously programmed with an area indirectly by using the duct dimensions The display will firstly scroll through the previously programmed duct dimensions as follows for circular ducts dia diameter of duct
9. or if the unit is not recall sted a pm read_ i off S LB 9 used and no flow sensed tor a period of 3 minutes wel lay g fF xs F i for auto off see section 5 1 ene max Y off Py mins JL Zs off Turns the power off to the instrument Ps ee I e This key has a time delay to prevent inadvertent operation press and TN hold down for at least 1 second area PERGE i eaa G Y 2 NA Press to operate the back light T aaa r light I flow clear ca units ligh A Z A Q 0 KS memory mode Switches the unit between read mode and memory recall mode N a A Fig 4 Keypad vel tem In recall mode allows sequential selection of either velocity or temperature readings when examining maximum or P 4 minimum stored values see section 5 7 6 avg ae i max In recall mode allows sequential selection of the average maximum or the minimum of the readings held in min 5 memory see section 5 7 6 In read or recall modes press once to print current displayed value print In read mode double press to enter logging mode see section 5 7 2 eo In recall mode only use the gt key or TN key to select a required memory location and press twice to print out all stored A values from the selected location onwards See section 5 8 for full details on gt s printing In recall mode a single key press will increase the memory location by one Holdin
10. see Fig 1 Notes 1 The instrument may occasionally display CALC in the flow display and inhibit readings During this period the instrument is seeking the optimum reference threshold to maintain the accuracy of measurement 2 Ifthe instrument repeatedly displays CALC the display may change to EEEE and inhibit readings This indicates that more than the acceptable number of invalid readings are being acquired Check that the head is not blocked and re adjust the head position if necessary If this condition persists after having turned the instrument off and on again contact Airflow Developments Limited on High Wycombe 01494 525252 2 The units for velocity measurement are displayed on an annunciator above the displayed flow reading Select the units required either m s km h kts knots mph or ft min by sequentially pressing the flow key units 0 3 Select the required analogue scale display range see FIG 1 by pressing the re key 2 The scale range will depend upon the velocity units previously selected in 2 as shown in the following table Analogue scale range selected Velocity units Selected 0 3 89 19 45 400 2000 j 2 000 6000 6000 The instrument is now ready to take air flow velocity measurements 400 4 The positioning of the head is tolerant to 15 variation in pitch and yaw however for the highest accuracy point the head directly into the air stream The reading obtai
11. 0 Telefax 02226 9205 11 eMail airflow t online de Buckinghamshire HP12 3QP England Telephone 01494 525252 443821 Airflow Lufttechnik GmbH o s Praha Hostynska 520 10800 Praha 10 Malesice Facsimile 01494 461073 Czech republic Telefon a fax 02 77 22 30 E mail info airflow co uk Airflow Technical Products Inc 23 Railroad Avenue Netcong N J 07857 USA AAW httn Anaaaw airflow co tik Talanhone 201 691 4895 Fax 201 891 4703 19
12. 9021423 B 1103 A i R f L O W SPECIALISTS IN AIR MOVEMENT TECHNOLOGY Anemosonic UA30 Handheld Digital Ultrasonic Anemometer Operating Instructions CONTENTS SECTION PAGE No SECTION PAGE No 1 Introduction 2 6 Analogue Digital Outputs 16 2 Supply Information 2 7 Calibration 16 3 Description of the Instrument 2 4 8 Test Features 16 4 Keypad functions 4 amp 5 9 Trouble shooting 16 5 User Guide 6 15 10 Specification 17 18 5 1 Powering the Instrument ON OFF 6 11 Service and Re calibration 19 5 2 Temperature measurement 6 12 Spares 19 5 3 Velocity measurement 7 amp 8 13 Optional extras 19 5 4 Setting display damping 8 amp 9 5 5 Flow turbulence measurement 9 5 6 Volume flow rate measurement 9 12 5 6 1 Programming a known duct area directly 10 5 6 2 Programming a known duct area indirect 11 amp 12 5 7 Logging measurements to memory 12 14 5 8 Printing 14 amp 15 Please read these instructions carefully before using the instrument Short form instructions are supplied on the back of the instrument 1 INTRODUCTION The Anemosonic UA30 referred to as UA30 in this text is a handheld instrument with digital LCD display which measures air velocity or volume flow flow turbulence intensity and temperature The instrument has the following features Air flow velocities are measured directly The UA30 head allows simultaneous monitoring of air flow temperature and turbulence intensity The UA30 unique m
13. RIC MODE IMPERIAL MODE Velocity Range 0 0 30 m sec 0 0 6 000 ft min Volume Range 0 0 3 000 m sec 0 0 6 456 x 1 000 cfm Better than 1 of reading 1 digit Or 1 of reading 0 01m s whichever is greater Velocity Resolution 16 Uncertainty of temperature 1 0 C 2 F measurement Temperature Resolution Flow turbulence intensity Tu 2 digit display 0 99 resolution 1 Area Input range 0 008 99 99 m 0 0862 1 076 ft Linear Dimension input range 0 0001 9 999 m sinch to 99 ft 11 inches subject to area max min constraints Memory Size 99 readings of velocity temperature and turbulence Note flow data is always stored as a velocity Auto Logging variable time base 1 second to 99 minutes 59 seconds Analogue Output O 1 volt standard 0 0 5v and 0 2v available on request Digital Output Serial RS232 at 19200 baud Power Supply 4x 1 5 volt AA cells rechargeable zinc carbon or alkaline or battery eliminator optional extra Battery Life Approximately 20 hours continuous operating use with new alkaline disposable cells Overall Dimensions 92 x 32 x 188 mm 3 6 x 1 2 x 7 4 inches temperature range Instrument Storage temperature range Ultrasonic probe ambient operating 0 70 C 32 158 F temperature range Weight less battery cells Standard Kit UA30 ultrasonic hand held instrument and head Handle and telescopic extension rod 0 4 to 1 1 m 15 to 43 inches with swivelli
14. ately 6 seconds and displays the result in the top LH display as a two digit percentage value To measure flow turbulence proceed as follows Follow the procedure outlined in section 5 3 Leer a Select turbulence mode by sequentially pressing the F key through C and F until two digital Ty characters replace the normal temperature reading The tlow readings will be displayed as normal Upon selection the display may flash until sufficient consecutive readings have been acquired to provide a meaningful calculation Readings may be stored manually or automatically as detailed in section 5 7 Readings may be printed out directly in read mode or when in recall mode as detailed in section 5 8 Press the A key to revert back to temperature read mode IY 3 Note in extremely turbulent flow conditions or at very low mean velocities the value of T can exceed 99 Under these circumstances the display will flash to indicate over range 5 6 Volume flow rate measurement Notes To enable volumetric flow rate measurements to be made it is necessary to programme the instrument with the duct or grille cross sectional free area If this area is known then it can be programmed into the instrument directly as an area If the area is unknown the linear dimensions of the duct can be programmed into the instrument which will then compute the area automatically The units used for du
15. ay D plug 72329603 SG pin7 0 x pin 7 SGx cable terminating in a 25 way D socket 72329604 CTS pin 8 0 x pin20 DTR 10 6 CE Marking The unit complies with the EEC Directive on Electromagnetic Compatibility EMC 89 336 EEC applied Harmonised Standards EN50081 1 Radiated Emissions and EN50082 1 Radiated and ESD immunities Note for full immunity to ESD the instrument printer socket FIG 2 item 3 10 MUST have the supplied plastic plug fitted whenever a printer or other device is not connected to it 18 11 SERVICE AND RECALIBRATION If a fault or the instrument s calibration is suspected it should be returned to Airflow Developments for repair or re calibration to original standards In any event it is good practice to have the instrument checked at least once a year If an instrument is not working correctly or requires re calibration contact your nearest Airflow Agent or the Airflow U K Service Department on High Wycombe 01494 525252 International 44 1494 525252 Airflow Developments operate an Instrument Hire Service for the convenience of customers having equipment repaired or re calibrated If you intend to take advantage of this facility please contact our Service Department to make arrangements prior to returning your instrument 12 SPARES LIST The following is a list of recommended spares Description Part No UA30 Anemometer Head Assembly Metal 72406901
16. ct area and duct dimensions MUST be consistent with those selected for volume flow rate as in the following table rate units Constraints constraints Metric Square metres m Metres m Allowable input Input range 0 0001 to 9999 m cubic metres per sec range Input values are subject to minimum maximum area m s 0 008 to 99 99 m limitations 1 Up to 9ft 11 amp 7 8 inches dimensions may be entered in feet inches and eighths of an inch Imperial Square feet f 2 Up to 99ft 11 inches dimensions may be entered in Allowable input feet and inches cubic feet per minute range 3 Up to 99 inches dimensions may be entered in ft min 0 0862 to 1076 f inches and eighths of an inch 4 Up to 999 inches dimensions in inches only Input values are subject to minimum maximum area limitations 1 Metric dimensions are keyed in as metres using the decimal keypad For dimensions less than one metre it is permissible to start with a decimal point and then key in up to four digits i e up to four decimal places 2 Imperial dimensions can be entered either in feet inches and eighths of an inch feet and inches only inches and eighths of an inch inches only ibject to the limitations stated in the above table The decimal point on the key is used to separate the feet inches and eighths of an inch inputs flow units clear If the decimal point is input first then this allows inches only to be input up to a
17. ctioning hold down the range whilst simultaneously pressing the key 2 on This will illuminate all the display segments as shown in FIG 1 followed by displaying the software version The unit will then enter its normal operating mode 9 TROUBLE SHOOTING 9 1 No display on switch on This indicates that either No batteries are fitted The batteries are inserted the wrong way round incorrect polarity Or the batteries are exhausted 9 2 The overrange probe check light illuminates on switch on and remains on This indicates that the ultrasonic anemometer head is either not plugged in has been plugged in incorrectly or either the head or its cable is faulty 9 3 The overrange probe check light illuminates during measurement This indicates that measured values are exceeding the pre selected range change the range as detailed in sections 5 3 1 3 or 5 6 3 9 4 The overrange probe check light illuminates during recall This indicates that the stored values are exceeding the pre selected range change the range as detailed in sections 5 3 1 3 or 5 6 3 9 5 Memory Stored values will not be lost upon removal of the batteries or switching the instrument off Should a fault occur that cannot be resolved by any of the above then contact either your distributor or Airflow Developments Ltd to discuss the fault and or make arrangements to return the unit stating full details of the fault 10 SPECIFICATION 10 1 PARAMETER MET
18. d by the re appearance of the required time interval Or b If the time interval is to be changed key in the new time in minutes and seconds by entering the required number for each digit when it flashes When the required time interval has been correctly entered press the key The word printing and four dashes will momentarily appear on the display followed by the appearance of the entered time interval 3 When the automatic logging is to commence press the key again The instrument will display the current reading and memory counter reading The word PRINTING will be displayed the current displayed reading will be logged and the memory counter will increment each time a reading is logged into memory Note during automatic logging the power auto off feature see section 5 1 is disabled 5 7 3 Stopping automatic logging of readings to memory 1 Double press the key The auto logging time interval will be displayed Print 8 2 Double press the key The instrument will revert to the normal read mode clear 5 7 4 Clearing the memory of stored readings valid in recall mode only 1 From read mode enter recall mode by pressing the Fecal Key read 7 12 The instrument will display RECALL MEMORY 1 in the bottom RH corner of the display and the data held in memory location 1 2 Press the key twice within a time of 2 seconds to erase all the data held in memory 5 7 5 To Review
19. d duct area with a flashing A in the top LH corner of the display b Instrument previously programmed with an area indirectly using the linear dimensions of the duct The display will firstly scroll through the previously programmed duct dimensions as follows for circular ducts dia diameter of duct for rectangular ducts L1 width and L2 height for oval ducts d1 major axis dimension and d2 minor axis dimension The instrument will then display the computed duct area with the units above the top left hand corner of the computed area and a letter A flashing in the top left hand corner of the display 4 Ifthe displayed information is acceptable without further change then press the key The displayed letter A will stop flashing to indicate that the existing information has been accepted and the instrument will then return to its normal read mode If new values are required the procedure will depend upon the shape of the duct as follows a For a circular duct Press the l key The instrument will display dia together with its current value Key in the new duct y diameter and then press the store b For a rectangular duct Press the r key The instrument will display L1 together with its current value Enter the new value for the duct width and then press the y key The instrument will then display L2 together with its current value Enter t
20. ensure that it is properly seated Note Stored readings are held in an EEPROM enabling stored data to be remembered during a battery change 2 3 Battery eliminator this connects via the 2 5mm jack socket item ref 3 8 FIG 2 Supply requirements are 6 volt d c at a minimum current of 100mA with the jack tip being supply ve Airflow can supply a suitable unit under Part No s 9020897 for 3 pin UK version or 9020855 for 2 pin European version Warnings 1 Ensure that the output voltage and polarity switches are set correctly 2 Switch the UA30 instrument OFF before plugging in or removing the battery eliminator 3 1 DESCRIPTION OF THE INSTRUMENT refer to diagram FIG 2 Item 3 1 Instrument case Item 3 2 Keypad refer to FIG 4 This acts as a decimal keypad for entering data but each key is also assigned specific function s For keypad functions refer to Section 4 Item 3 3 Display This is a custom Liquid Crystal Display LCD and FIG 1 shows the display s principle features Note FIG 1 shows the display with all the segments illuminated this is a condition which will not occur in normal use but only during the display test see section 8 1 DISPLAYED DURING PRINTING ONLY ANEMOMETER TEMPERATURE AND TURBULENCE READING SELECTED ANALOGUE ANALOGUE SCALE OfSPLAY VELOCITY FLOW RANGE ANNUNCIATORS FOR AREA AND VELOCITY VOLUME FLOW UNITS ANEMOMETER VELOCITY FLOW READING 3 8 3 7 RS232 CONNECTOR 3
21. erture is covered by a grille particularly if this is of the type having adjustable vanes or dampers The air stream issuing from such a grille is invariably very disturbed consisting of many small areas of high velocity interspersed with areas of low velocity The transitions between these areas are highly turbulent and there may even be some reversed flow If maximum accuracy is required it is advisable to make up a short length of ducting which is just larger than the overall dimensions of the grille This test duct can be of any convenient rigid material such as stiff cardboard and it should have a length of about twice the diagonal measurement of the grille The duct should be placed over the grille and sealed to the wall with adhesive tape Measurements of flow can now be conducted as already described at the unobstructed end of the test duct For volume flow readings refer to section 5 6 ensure that the cross sectional area of the test duct not the grille is entered into the UA30 5 4 To Set Display Damping If excessive display jitter is obtained when taking flow measurements this may be smoothed out by increasing the display damping time constant as follows Switch the instrument off using the R key oO Turn the instrument back ON by simultaneously holding down the nfo and the Di 8 Number displayed Display damping time n Constant seconds The two left hand digits of the display which normally indicates the velocit
22. ethod of measurement gives fast response to transient changes in flow and temperature which allows the flow turbulence intensity at any point to be monitored Measurements may be displayed in either Metric or Imperial units Manual or automatic logging of measurements for later analysis Duct grille areas may be either entered directly or indirectly by entering the linear dimensions of rectangular round or oval duct shapes An RS232 output is provided to enable data to be downloaded to a printer data logger or computer Auxiliary analogue outputs of Air flow and Temperature The instrument is battery powered for portability but a battery eliminator can be provided as an optional extra The following equipment is supplied in an Executive style carry case 1 off UA30 handheld instrument 1 off Ultrasonic anemometer head and cable 1 off handle 1 off telescopic rod extends to a length of about 1m 4 off 1 5 volt AA size batteries Check the equipment for any damage during transit If any item is damaged report this immediately to Airflow Developments Ltd telephone High Wycombe 01494 525252 or your local agent Please read these instructions carefully to familiarise yourself with the operation of the instrument prior to carrying out any work WARNING the UA30 head is a delicate precision instrument and must be treated as such If any damage occurs especially to any of the three vertical transducer columns this may a
23. ffect the accuracy of the calibration and in the extreme cause complete failure Report any damage immediately to Airflow Developments Ltd Please note that the UA30 Head is matched to the instrument and is not transferable onto any other instrument unless re calibrated by Airflow Developments Airflow Lufttechnik or Airflow Technical Products 2 SUPPLY INFORMATION 2 1 Battery supply a set of battery cells are provided in the carry case but due to their limited shelf life are not included by the Airflow standard warranty For replacement four 1 5 volt AA size cells are required which may be disposable or rechargeable types Either Standard or Alkaline disposable cells may be used but the Standard type will exhibit a relatively short life and are therefore not recommended Low battery condition is indicated by LOBAT appearing on the instrument display the cells must then be replaced as soon as possible to maintain optimum accuracy 2 2 Battery replacement the battery cells are accessed by means of a slide and snap in cover at the rear of the instrument case To remove the battery cover press firmly on the cover and slide it in the direction of the arrow The batteries may now be removed by pulling on the tape fitted in the battery compartment When replacing the batteries ensure that the tape is fitted underneath and that each cell is replaced with the correct polarity as indicated Rotate each battery cell slightly to
24. g this key down will continuously increment the memory location with rollover from the top memory location to location 01 In area mode press to select a rectangular duct shape a In recall mode a single key press will decrease the memory location by one Holding this key down will continuously decrement the memory location with rollover from location 01 to the top memory location In area mode press to select a circular duct shape a e Selects area mode The first press cycles the display through the current duct dimensions and will then display current duct area Press the key if acceptable store area A second key press will allow entry of a new duct area using the decimal keypad When acceptable press the key store To change the duct dimensions press the key select the duct shape key required and enter the new dimensions using the decimal keypad as area prompted on the display i When acceptable press the key See section 5 6 for full procedure on how to enter a duct store area flow Each press allows the sequential selection of the following velocity volumetric units units m sec m sec km h kts knots mph ft min ft min In read or recall mode allows the full scale value of the analogue velocity volume flow scale and range analogue outputs to be changed see sections 5 3 1 3 or 5 6 2 6 n read mode allows the sequential selection of readings of temperature in either Cels
25. gue output is connected to the tip of the jack plug The temperature analogue output is connected to the barrel of the jack plug The range of the analogue vel vol output is selected by altering the analogue scale range see sect 5 3 1 3 6 2 RS232 15 In order to conserve battery power the RS232 Output will only operate during the print command This is effective in a single reading use when in read mode all printing commands in memory recall mode and during auto logging to memory mode Using the auto logging mode of operation a periodic output can be obtained on a time interval settable between seconds and 99 minutes 59 seconds See section 5 7 2 Note Do not set below 5 secs when using Seiko printer 7 CALIBRATION The instrument and associated Ultrasonic anemometer head are calibrated to either British Maritime Technology BMT or National Institute of Standards and Technology NIST standards It is possible to modify the calibration to suit alternative standards However this SHOULD BE UNDERTAKEN BY SKILLED PERSONNEL USING A STABLE SOURCE OF AIR FLOW WITH THE REQUIRED CALIBRATION ACCURACY The calibration is linearised by means of software and therefore only needs a single point calibration To ensure Maximum accuracy over the entire operating range it is recommended that the instrument is calibrated at or near to its full scale value 8 TEST FEATURE Display Integrity To establish that all the display annunciators are fun
26. he initial memory location a 3 Double press the key The printer will print out velocity volume flow and temperature values from the selected initial memory location and will continue to print until either it reaches the highest memory location or is commanded to stop printing refer to 5 8 6 Note turbulence values are not printed out in this mode but can be obtained by single value print out see 5 8 2 above recall 4 Pressthe key to return to normal read mode read 7 5 8 5 Printing Average maximum or minimum values of stored readings valid in recall mode only Display the required average maximum or minimum of the stored velocity volume flow or temperature readings as detailed in section 5 7 6 Press the to obtain the required printout 5 8 6 To stop a printout Press and momentarily hold down the pi key and then press it again keypresses will not be recognised rint during the actual printing process 6 ANALOGUE DIGITAL OUTPUTS 6 1 Analogue 0 to 1volt full scale analogue D C outputs of velocity volume and temperature are accessed via a 3 5mm 2 pole jack socket on the LH side of the unit FIG 2 item 3 7 to allow the data to be output to a chart recorder or a data logger Airflow can provide a compatible data logger please contact Airflow Sales Department for details The outputs may be factory set to between 0 0 5v minimum and 0 2 0v maximum on request The velocity volume analo
27. he new store value for the duct height and then press the key again lt store c For an oval duct Press the 5 key The instrument will display d1 together with its current value Enter the new value f for the duct major axis dimension and then press the CY 3 key The instrument will then display d2 together with its current value Enter the new value for store the duct minor axis and then press the key again store The instrument will then display the new computed value for the duct area and return immediately to the read mode The settings may be checked by pressing the key and confirmed by pressing the area key store 5 If at any point it is decided to abandon the programming area function then press the clear key repeatedly if necessary until the instrument returns to its normal read mode and its previous area value Note once entered the units of area may be changed between m and ft by means of the key 5 6 3 Select the required analogue scale range by pressing the key g 11 The analogue scale range will depend upon the volumetric units previously selected in sections 5 6 1 2 or section 5 6 2 2 as shown in the following table Volume Flow units Selected Analogue scale range selected Displayed Displayed Displayed 50 x duct area 400 x duct area 4 000 x duct area 10 000 x duct area 5 7 Logging measurements to memory Concurrent readings of flow temperature and
28. icate the position of the head in the duct 5 3 3 Measurement at grilles Avoid intrusion of the arm and hand into the face area of the grille The blockage effect could cause artificially high velocity over the remainder of the grille leading to incorrect readings The telescopic probe can be useful in avoiding this problem Better measuring conditions can be obtained on grilles with adjustable direction vanes if the vanes are temporarily straightened before taking measurements This should not significantly affect the flowrate so long as any built in dampers are not accidentally disturbed The instrument is suitable for both supply and extract grilles and the procedure is the same for both 5 3 4 Possible source of errors The above previous methods ignore the effects of the reduced velocity at the duct walls A more precise method is shown in BS1042 Part 2 the Log Tchebycheff method The positions for siting the probe for circular or rectangular ducts or apertures is shown in the following figures Note Should difficulty in access Make it impossible to traverse on More than two diameters these Should be mutually at right angles And the number of points on each Line must be increased to 10 The spacing should be as follows 0 019D 0 077D 0 153D 0 217D 0 361D 0 639D 0 783D 0 847D 0 923D 0 981D The above procedure is satisfactory for use in ducts and at unobstructed apertures however significant errors may occur if the ap
29. ius or Fahrenheit units or lG turbulence intensity Ty Note Turbulence intensity is the ratio of the standard deviation of the air velocity to the mean air velocity expressed as a percentage Refer to section 5 5 for measuring turbulence In area mode selects an oval duct shape In recall mode press twice within a time of 2 seconds to clear all readings from memory cigar In area mode press repeatedly if necessary to abandon area mode see section 5 6 1 5 In read mode stores current reading in memory see section 5 7 for storing data into memory store In area mode stores entered values see sections 5 6 1 and 5 6 2 for programming areas 5 USER GUIDE 5 1 Powering the instrument on off 1 Connect the Ultrasonic Anemometer Head to its socket on the top of the hand held instrument FIG 2 item 3 9 Ensure that the plug is orientated correctly before inserting Note if the head is not connected the overrange probe check LED will flash when the unit is powered up and CALC or EEEE will appear in the display 2 Press the key to turn the instrument on on The unit will remain on until either switched off manually using the off key or automatically by means of the unit s auto off function Auto off function the UA30 senses when the unit has not been used either from the keyboard or not receiving a flow input for a period of 3 minutes and is programmed to turn the u
30. n 5 CTS time out 3 seconds Baud rate preset to 19 200 Baud Transmission protocol 8 bit no parity 2 stop bits this allows compatibility with printers that expect either 1 or 2 stop bits Output voltages RS232 compatible 10v nominal for logic low 10v nominal for logic high input 3v minimum sensitivity 2 The mating mini DIN 8 pin plug Airflow Part No 904180 connector pin number identification is shown in the following diagram EXTERNAL VIEW aon 300405 Lee m Bei 3 Inter connections to Airflow APU 10 Printer Airflow Cable 2m long Part No UA30 8 pin APU 10 Printer UK European 72329605 Mini DIN socket with 9 way D socket USA 72329606 TX pin3 0 o pin3 DATA Cables are supplied with the printer SG pin 5 0 o pin5 SG CTS pin 8 0 o pin8 BUSY 4 Inter connections to a PC or typical Printer Airflow Cable 2m long Part No UA30 8 pin PC or typical Printer Mini DIN socket with 9 way D connector TX pin3 0 x pin2 RDx cable terminating in a 9 way D plug 72329601 SG pin 5 0 x pin5 SG x cable terminating in a 9 way D socket 72329602 CTS pin 8 0 x pin4 DTR UA30 8 pin PC or typical Printer Mini DIN socket with 25 way D connector TX pin3 0 x pin3 RD x cable terminating in a 25 w
31. ned may be stored see section 5 7 1 or printed out see section 5 8 1 5 When measuring the velocity or volume flowrate over a large area a number of readings must be taken spaced to give an even coverage of the whole area and stored as detailed in section 5 7 It should be noted that quite large variations in readings may be observed and in general the more readings taken the more accurate will be the mean velocity or volume flowrate The average of the stored readings will give the mean velocity or volume flowrate as detailed in section 5 7 6 The UA30 normally takes measurements calculates the average value and displays this over a 0 6 second period of time in order to avoid display jitter caused by turbulence If the display jitter is still excessive the display damping may be increased as detailed in section 5 4 6 wm 5 3 2 In duct measurements a The head may be sited permanently in the duct attached to a stub by means of a spigot threaded M10 x 15mm Pass the head cable through the duct via a suitable cable gland to allow the cable to be attached to the UA30 hand held instrument in the normal manner b To take traverse measurements across the duct a 60mm minimum diameter duct access hole is required to allow the UA30 head to pass through the duct wall Cover the duct access hole with a cover plate having a 20mm nominal diameter hole through which passes the telescopic probe arm The telescopic rod may be marked to ind
32. ng joint Executive carry case Calibration certificate Optional Accessories Battery eliminator for mains supply operation APU 10 Mini Printer and lead Range of printer PC cables 10 2 Analogue scale display Bargraph Scaling Range selected Parameter Velocity Volume 10 x duct area flow 10 3 Analogue Flow Output Output on tip of jack plug 0 to 1 volt but 0 to 0 5v or 0 to 2 0 volt can be supplied on request Range selection as per the analogue scale display in table in section 10 2 with the exception of the Imperial velocity range as follows Parameter Range Selected Velocity ft min Displayed Displayed Displaye d 4 000 3 937 10 000 9 843 Accuracy at 20 C ambient Within 10 millivolts of displayed reading 17 Output drift I millivolt maximum per C ambient 5 millivolts 10 4 Analogue Temperature Output Output on barrel of jack plug 0 to 1 volt but 0 to 0 5v or 0 to 2 0v can be supplied on request Accuracy at 20 C ambient Within 10 millivolts of displayed reading Output drift 1 millivolt maximum per C ambient 5 millivolts 10 5 RS232 Output 1 This provides a serial data output for sending to a printer or other compatible device via an 8 pin mini DIN non latching socket FIG 2 item 3 10 The attached device must conform to the following protocol Emulation DTE emulation as per IBM PC Lines TDX Transmit data pin 3 CTS Clear to send pin 8 SG Signal groundpi
33. nit off automatically to conserve battery life The Auto off may be disabled as follows Hold down the avg key while simultaneously pressing the on __ key max min 5 The analogue scale line on the display see FIG 1 will flash three times to show that this command has been accepted before the display illuminates Subsequently the analogue scale line will continue to pulse as a reminder that the auto off facility has been disabled The instrument can now be turned off only by use of the P key 0 When the unit is powered up again the Auto off function will be re enabled 5 2 Temperature Measurement For air flow temperature measurement the UA30 Ultrasonic Head has an integral temperature probe fitted 1 Power the instrument up see section 5 1 the instrument will power up in the read mode The temperature will be displayed on the 3 digit display in the top left hand corner of the display area see FIG 1 2 The units of temperature measurement C F are displayed on an annunciator adjacent to the displayed temperature reading The units may be changed by sequentially pressing the key ED The instrument is now ready to take air flow temperature measurements 5 3 Velocity Measurement 5 3 1 Initial setting up 1 Power the instrument up see section 5 1 the instrument will power up in the read mode The flow reading will be displayed on the main 4 digit display at the bottom of the display area
34. temperature readings 3 Press the avg key again The instrument will display the following max min 5 Top RH corner MAX VEL Main bottom display The maximum of the stored velocity volume flow readings depending upon selection of the flow key units 13 Bottom RH corner The memory location of the maximum velocity flow reading Top LH corner display The corresponding stored temperature reading at the above memory location Press the vel key The instrument will display the following temp Top RH corner TEMP MAX Top LH corner display The maximum of the stored temperature reading Bottom RH corner The memory location of the of the maximum temperature reading Main bottom display The corresponding stored velocity volume flow reading at the above memory location 4 Press the abe key again The instrument will display the following min 5 Top RH corner TEMP MIN Top LH corner display The minimum of the stored temperature reading Bottom RH corner The memory location of the minimum temperature reading Main bottom display The corresponding velocity volume flow reading at the above memory location depending upon the selection of the flow key units 0 avg 5 Pressing the Max key again will revert back to normal recall mode min 5 6 Press the recall key to revert to normal read mode read 7 note multiple maximum or minimum s will be indicated by either min or
35. y reading will display dA while the most right hand digit will display the damping time 1 by means of a number n according to the adjacent 2 3 table a EE The display damping time constant number n may be altered by means of the a key and M key ES 9 Following selection of the new display damping time constant switch the instrument into read mode by using 5 5 the key to store the new value into the instrument s non volatile memory and to exit the display store damping mode This value will then be remembered until changed by means of the above procedure Note for display damping values of n other than 1 AVG will be displayed in the top RH of the LCD display when taking readings The damping factor applies to displayed readings only and is not applicable when readings are stored or to turbulence measurement Measurement of flow turbulence intensity Ta Flow turbulence intensity is the amount of variation of the flow from its mean value at any point measured as a standard deviation and is defined as follows The relative turbulence intensity Tu S _x 100 v Where S the standard deviation of the sampled velocity readings v the mean of the sampled velocity readings and N the number of sampled readings The UA30 calculates the flow turbulence intensity according to the above equations at any point in a room duct or grille over a sampling period of approxim
Download Pdf Manuals
Related Search