Model DA40V User Manual
Contents
1. PACER INSTRUMENTS 1450 First Ave Page 1 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com PACER INSTRUMENTS Model DA40V User Manual DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 2 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Warranty This product is fully warranted against defective materials and or workmanship for a period of one year after purchase provided it was not improperly used For your protection please use this product as soon as possible If returned it must be securely wrapped sent prepaid and insured to Pacer Industries Inc 1450 First Avenue Chippewa Falls WI 54729 PH 715 723 1141 FX 715 723 7890 Please include a note with name address telephone number and description of the problem Although we provide assistance on Pacer products both personally and through our literature it is still the total responsibility of the customer to determine the suitability of the product for use in their application This manual is provided by Pacer Industries without any kind of warranty Precautions have been taken in accurately preparing this manual however we neither assume responsibility for any omissions or errors that may ap2. key sets the measurement period to sixteen seconds The display will show 16 S for 16 sec then a measurement value It will update every two seconds with average of the preceding sixteen seconds MAX MIN Pressing MAX MIN key within either velocity or volume flow mode displays the highest reading respectively since turn on A second key press will display lowest reading since turn on In 2 SEC mode display reads H 2 L 2 followed by reading In 16 SEC mode display reads H 16 L 16 followed by reading See APPENDIX A for description of algorithm that determines MAX and MIN Clear internal memory by turning unit OFF Clear the MAX MIN mode by pressing any other key except HOLD HOLD RESET Pressing HOLD RESET key will freeze the reading on the display HOLD is displayed and the reading is held Pressing HOLD RESET key a second time frees the display DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 5 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com VOLUME Pressing VOLUME key will cause E 20 to be displayed unless duct size has been entered since ON OFF key was last pressed see SET below Once duct size has been entered the unit will enter volume flo
3. above divide by 144 area in sq in 144 area in sq ft Example The air duct is rectangular the width is 24 in and the height is 12 in The air velocity reading through the duct is 450 FPM Calculate the Volume Flow Step 1 Cross sectional area 24 in x 12 in 288 sq in Step 2 288 sq in 144 2 sq ft Step 3 Volume flow Air Velocity x Area therefore Volume flow rate 450 FPM x 2 sq ft 900 CFM APPENDIX F ERROR CODES E 20 The volume factor is undefined duct dimensions have not been entered since turn on E 21 The calculated volume flow rate is not within the 9999 CFM or CMH range of the display DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 9 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Notes DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141
4. IAGRAM Connector Pinout ire Code top view keyway lt 5 0 0 o Air Velocity Connector Pin 1 Large Small Probe Bit Grn Pin 2 Velocity Input Pulse Brn Pin 3 Ground Gry Pin 4 V power Wht APPENDIX C LCD DISPLAY SYMBOLS LCD DISPLAY LOW DISPLAY BATTER HOLD CUBIC SYMBOL CFM ft min or CMH rnr hr FEET PER MINUTE SYMBOL ft min METERS PER SECOND SYMBOL mis APPENDIX D CHANGING BATTERIES 2 AA alkaline batteries battery compart ment battery hinge battery points lid tab DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 8 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com APPENDIX E AIRFLOW VOLUME CALCULATIONS Theory To calculate cubic feet per minute CFM from a measured air velocity FPM you need the calculated cross sectional area of the air flow stream Volume Flow CFM Velocity FPM X Area sq ft In rectangular duct work this cross sectional area equals the Width times the Height W x H A cross sectional area In circular ductwork this cross section area equals the radius squared times z 3 14 oO R x R x 3 14 A cross sectional area To convert an area calculated in square inches to an area calculated in square feet which is required for the Volume Flow equation
5. IX B for connector wiring diagram 3 Press the ON OFF key to turn unit ON The display will show all its elements see APPENDIX C followed by the remaining battery capacity bA85 means the battery is at 85 capacity followed by 2 75 or 1 00 indicating the AP275 or AP1OO probe respectively is attached When the battery symbol appears during use replace batteries 4 Press FPM MPS key if necessary to display desired units Place probe in the air stream with direction arrow if present in the direction of the airflow 5 To calculate CFM manually see APPENDIX E To measure volume flow rate directly press the VOLUME key and follow instructions in SECTION 2 VOLUME above NOTE When symbols CUBIC and MPS are displayed measurement 1s CMH not CMS DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 6 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com 6 To correctly measure the air velocity or volume flow rate from a large duct set unit to AVG mode and move probe about the area of the opening After 16 seconds the unit will display the average for the preceding 16 seconds after that updating every 2 seconds by adding the latest and dropping the oldest 2 second measurement 7 To get maximum readi
6. c low battery display Dimensions Instrument 7 1 x 3 0 x 0 8 AP275 probe 2 34 diameter AP100 probe 1 diameter Weight 8 ounces with batteries Display 0 5 LCD 4 digits Options Model CG 4 charger PN 3303 with 4 NiMH batteries Additional probe AP100 1 or AP275 2 34 Cable longer than 5 PN 3834 specify length Extra extension rod PN 5001 rigid PN 5002 flexible Included 1 piece Probe choice of AP100 or AP275 3 pieces PN 5001 rigid extension rod 1 piece PN 5002 flexible extension rod 1 piece PN 3834 5 ft connection cable 2 pieces AA 1 5V alkaline batteries 1 piece PN 6004 hard shell carrying case piece M2945 operation manual Pacer Instruments Inc www pacer instruments com Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 4 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com SECTION 2 SWITCH FUNCTIONS DIGITAL ANEMOMETER MODEL DA40V ON OFF Pressing ON OFF key switches unit ON Pressing the key a second time turns it OFF FPM MPS _ Pressing FPM MPS key toggles unit from FPM 1 FPM resolution to MPS 0 01 MPS resolution 2 SEC Pressing 2 SEC key sets measurement period to two seconds The display will show 2 SEC then a measurement value It will update every two seconds with average of the preceding two seconds AVG Pressing AVG
7. ngs since turn on press MAX MIN key to get minimum readings press MAX MIN key a second time For explanation of the displayed views see MAX MIN paragraph in SECTION 2 also APPENDIX A 8 To HOLD the displayed reading press the HOLD RESET key Press key again to clear the HOLD condition APPENDIX A MAX MIN CALCULATIONS 1800 2ND MAX 1600 HIGHEST MAXI R 1400 i 1200 1000 800 i ade 1ST MIN 400 T 200 ZERO CROSSING NOT ATH MIN Y REFLECTED IN MIN READING LOWEST MIN 0 F 0 2 4 6 8 101214 1618202224 2628 ELAPSED TIME A 1 MAX reading Also first minimum reading to be replaced at B B This 1 MIN at B is the lowest yet and will be registered as velocity increases C This 2 higher MAX at C will register as the velocity decreases replacing 1 MAX D This 2 MIN at D is higher than the MIN already registered and will be ignored E This 4 MIN at E is lower than the Ist MIN registered at B and will replace it F The zero crossing at F does not form a MIN and will be ignored This protects against false MIN readings when the probe is withdrawn from the air stream DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 7 of 9 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com APPENDIX B CONNECTOR D
8. pear nor assume liability for any damages that result from the use of the products in accordance with the information contained in the manual DA40V User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Page 3 of 9 INTRODUCTION Pacer s model DA4OV digital anemometer is a versatile instrument for measuring air velocity and volume flow rate from HVAC ducts or process airflow The heavy all metal except electronics probe can be used for airstreams that have a wide range of humidity temperature and contaminants without compromising accuracy Features include choice of probe diameters custom cable lengths tolerance of temperatures up to 210 F 98 9 C at the probe and durability SECTION 1 SPECIFICATIONS Range Velocity AP275 probe AP100 probe Volume flow rate 40 7800 FPM 0 2 40 0 MPS 60 6800 FPM 0 3 35 0 MPS 0 0 9999 ft min CFM or 0 0 9999 m hr CMH DA40V User Manual Rev 1 0 11 Aug 2007 Accuracy 1 0 of reading 1 digit Resolution 1 FPM or 0 01 MPS Operating Temperature Instrument 32 to 125 F 0 to 50 C Probes 4 to 210 F 20 to 98 9 C Power Supply 2 AA alkaline batteries E91 Eveready or equivalent Battery Life Approximately 300 hours Battery check Automati
9. w mode upon the first key press upon second and subsequent key presses volume flow units will toggle between CFM and CMH E 21 displays upon an overflow see APPENDIX F SET Pressing SET key locks in choices presented by ADJ key actuation and advances menu to next decision needed In order you must choose A UNITS After SET key is pressed for the first time Unit is displayed Choose inCH or CEnt for inches or centimeters respectively Press SET B DUCT SHAPE Choose rECt or CirC for rectangular or circular ducts respectively Press SET C DUCT SIZE For rectangular ducts Display will read HEit after B above Press ADJ key until first digit of height shows Press SET Repeat for next three digits Display will now read Len Enter four digits of length Display will show 2 SEC and volume flow will now display For circular ducts Display will read diA after B above Enter four digits of the diameter as above tl KEY The direction key changes the order of numbers being displayed in C above choosing backwards or forwards enumeration SECTION 3 OPERATION NOTE Unit should be OFF before changing batteries or attaching probe 1 Remove battery compartment lid and insert batteries replace lid see APPENDIX D 2 Attach the probe cable by aligning the keyway s inserting connector s and turning collar s to tighten see APPEND
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