Model DA40T User Manual
Contents
1. Air Velocity x Area therefore Volume flow rate 450 FPM x 2 sq ft 900 CFM APPENDIX F ERROR CODES E 08 Temperature lower than 95 0 C or 139 F E 09 Temperature higher than 205 0 C or 401 0 F DA40T 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 10 of 10 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Notes DA40T User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 11412. PACER INSTRUMENTS 1450 First Ave Page 1 of 10 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com PACER INSTRUMENTS Model DA40T User Manual DA40T User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com Phone 1 800 283 1141 11 Aug 2007 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 2 of 10 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 appear nor assum
3. APT275 or APT100 probe respectively is attached Replace batteries if symbol shows during usage 4 Press FPM MPS key if needed to display desired units Place probe in the air stream with the axis or direction arrow if present in the direction of the airflow To calculate CFM see APPENDIX E 5 To correctly measure the air velocity from a large duct set unit to 16 SEC mode and move probe about the area of the opening After 16 seconds the unit will display the velocity for the preceding 16 seconds updating after that every 2 seconds by adding the latest 2 second measurement and dropping the oldest 2 second measurement 6 Press F C key to display temperature in F press again to display in C Place probe in area to be measured See APPENDIX F if E xx is displayed 7 To get maximum readings 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 see APPENDIX B 8 To HOLD the displayed reading press the HOLD RESET key Press key again to clear the HOLD condition DA40T 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 APPENDIX A CONNECTOR DIA
4. 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 10 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com SECTION 2 SWITCH FUNCTIONS ON OFF FPM MPS FPLC 2 SEC 16 SEC MAX MIN DIGITAL THERMOMETER ANEMOMETER MODEL DA40T cug SEC Pressing ON OFF key switches unit ON Pressing the key a second time turns it OFF Pressing FPM MPS key toggles unit from FPM 1 FPM resolution to MPS 0 01 MPS resolution Pressing the FPC key displays temperature in degrees Fahrenheit F pressing key a second time changes display to Celsius C 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 Pressing 16 SEC key sets 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 Pressing MAX MIN key displays the highest reading since turn on for air velocity or temperature Pressing key a second time will display lowest reading since turn on Air Velocity In 2 SEC mode display reads H 2 L 2 followed by reading In 16
5. SEC mode display reads H 16 L 16 followed by reading Temperature Maximum is indicated by H tP followed by reading Minimum is indicated by L tP followed by reading Clear the internal memory by turning unit OFF Clear the MAX MIN mode by pressing any other key except HOLD See APPENDIX B for description of algorithm that determines MAX and MIN DA40T User Manual Pacer Instruments Inc Rev 1 0 11 Aug 2007 www pacer instruments com Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 6 of 10 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com 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 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 APPENDIX A for 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 that the
6. Air Velocity 1 FPM or 0 01 MPS Temperature 0 1 F or C 1 F below 99 9 F 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 200 hours Battery check Automatic low battery display Display 0 5 LCD 4 digits Weight 8 ounces with batteries Dimensions Instrument 7 1 x 3 0 x 0 8 APT275 probe 2 34 diameter APT100 probe 1 diameter DA40T 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 4 of 10 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Options Model CG 4 charger PN 3303 with 4 NiMH batteries Additional probe APT100 1 or APT275 2 32 Cable longer than 5 Model 3836 specify length Extra extension rod PN 5001 rigid PN 5002 flexible Special purpose temperature probes PT201T PN 6332 GP immersion probe PT202T PN 6334 air temperature probe PT203T PN 6335 surface probe Included piece probe head choice of APT100 or APT275 3 pieces PN 5001 rigid extension rod piece PN 5002 flexible extension rod piece PN 3836 5 ft connection cable attached to the APT100 probe 2 pieces AA 1 5V alkaline batteries 1 piece PN 6004 hard shell carrying case piece Operation manual DA40T User
7. GRAM Connector Pinout Vire Code top view Air Velocity Connector Pin 1 Large Small Probe Bit Pin 2 Velocity Input Pulse Pin 3 V VDC power Pin 4 Ground Pin 5 RTD1a Pin 6 RTD2a Pin 7 RTD2b APPENDIX B MAX MIN CALCULATIONS 2ND MAA HIGHEST MAX TST MIN E ATH MIN LOWEST MIN ZERO CROSSING NOT REFLECTED IN MIN READING 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 1 MIN at B is the lowest yet and will be registered as velocity increases Gra Brn Red Bik Yel Grn Blu Page 7 of 10 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 DA40T User Manual Rev 1 0 11 Aug 2007 Pacer Instruments Inc www pacer instruments com 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 8 of 10 APPENDIX C LCD DISPLAY SYMBOLS LCD DISPLAY LOW DISPLAY BATTER HOLD FEET PER MINUTE SYMBOL ft min METERS PER SECOND SYMBOL mis DE
8. GREES FAHRENHE SYMBOL DEGREES CELCIUS SYMBOL APPENDIX D CHANGING BATTERIES 2 AA alkaline batteries battery compart ment battery hinge battery points lid tab DA40T 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 10 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 airflow stream Volume Flow CFM Velocity FPM X Area sq ft In rectangular ductwork this cross sectional area equals the Width times the Height T W x H A cross sectional area In circular ductwork this cross section area equals the radius squared times m 3 14 OVG 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 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
9. e liability for any damages that result from the use of the products in accordance with the information contained in the manual DA40T 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 3 of 10 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com INTRODUCTION Pacer s model DA4OT digital thermometer anemometer is a versatile instrument for measuring air velocity and temperature of airflow from HVAC ducts or process air flow The heavy all metal except electronics probe can be used for airstreams which have a wide range of humidity temperature and contaminants without compromising accuracy Temperature sensor is a Platinum Resistance Element RTD Features include choice of probe diameters custom cable lengths tolerance of temperatures up to 210 F 98 9 C at the probe and durability Optional special purpose temperature only probes may be purchased from factory SECTION 1 SPECIFICATIONS Range APT275 probe 40 7800 FPM 0 2 40 0 MPS APT100 probe 60 6800 FPM 0 3 35 0 MPS Temperature Either velocity probe 22 to 212 F 30 to 100 C Temperature Optional temperature only probes 139 to 392 0 F 95 to 200 0 C Accuracy Air Velocity 1 0 of reading 1 digit Temperature 0 3 of Reading 1 digit Resolution
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