DA 430 User Manual
Contents
1. PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com PACER INSTRUMENTS Model DA430 HYGRO THERMOMETER ANEMOMETER p PACER INST User Manual DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 1 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com INTRODUCTION Congratulations on your purchase of a DA430 Digital Hygro Thermometer Anemometer You now own one of the most accurate reliable and highly regarded airflow temperature and humidity measurement instruments available today Pacer s model DA430 digital hygro thermometer anemometer is a versatile instrument for measuring air velocity temperature and humidity in various applications such as HVAC aerospace development industrial process airflow and fluids research The rugged yet precise air probe can be used in airstreams that have a wide range of humidity temperature and contaminants without compromising air velocity measurement accuracy The combination humidity and temperature probe gives accurate readings across a wide range of temperatures and humidities Features include custom cable lengths service temperatures up to 212 F 100 C at the ai2. P Computer S Disk drives a Display adapters DVD CD ROM drives i Floppy disk controllers A IDE ATA ATAPI controllers IEEE 1394 Bus host controllers Keyboards H E y Mice and other pointing devices he Modems a Monitors Network adapters H E PCMCIA adapters Ports COM amp LPT F Communications Port COM1 jf ECP Printer Port LPT1 EE USB Serial Port COM SM Processors Sound video and game controllers You are now ready to capture the data being measured by your instrument Please refer to Appendix G Viewing and Capturing Data for further instructions DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 16 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com APPENDIX F RS232 COMMUNICATIONS IF EQUIPPED If the instrument is equipped with the RS232 Communications option there will be a three pin male connector on the bottom of the instrument Also an RS232 cable will be included with the instrument This cable will have a three pin female connector on one end and a DBY Female connector on the other end RS232 Data Output Instructions for Use STEP 1 Connect the RS232 cable included to the female connector on the bottom of your instrument Connect the other end to a
3. 1036 Keene NH 03431 USA sales pacer instruments com Notes DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 26 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Notes DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 27 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com PACER INSTRUMENTS Pacer Instruments Inc PO Box 726 60 Dunbar Street Keene New Hampshire 03431 USA 800 283 1141 603 352 0187 Fax 603 352 1036 sales pacer instruments com www pacer instruments com Copyright 2008 Pacer Instruments Inc Pacer Pacer Instruments DA430 AP275 AP100 HTP202 and the Pacer Instruments logo are trademarks of Pacer Instruments Inc DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 28 of 28
4. Parity None Stop bits 1 Flow Control None Serial Port Protocol Data Output Interval One Second Data Format Comma Separated Values CSV Measurement Units Same as Units shown on LCD Display DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 21 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Below are examples of the formatted output data for Pacer s Premier Series Instruments units may be different depending on the units selected on the LCD display Model DA400 Air 47 FPM lt CR gt Model DA410 displaying in Air Velocity Mode Air 47 FPM lt CR gt Model DA410 displaying in Volume Flow Mode Air 251 CFM lt CR gt Model DA420 Air 47 FPM Temp 56 7 C lt CR gt Model DA430 Air 47 PM Temp 56 7 C RH 40 5 lt CR gt Model DH500 Temp 56 7 C RH 40 5 DewP 43 6 C lt CR gt DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 22 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Exporting and Graphing Data Exporting serial port instrument data from the Pacer Instrument to a spreadsheet application such as M
5. humidity reading is invalid until the condensation has evaporated completely Both the humidity and temperature sensors will have a faster response time if they are exposed to a moving air stream This is because forced convection will cool or heat the sensors faster than free convection DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 10 of 28 Phone 603 352 0187 603 352 1036 Fax sales pacer instruments com PACER INSTRUMENTS PO Box 726 60 Dunbar Street Keene NH 03431 USA APPENDIX A LCD DISPLAY SYMBOLS LCD DISPLAY LOW RELATIVE DISPLAY BATTERY HUMIDITY HOLD FEET PER MINUTE ft min RH HOLD METERS PER SECOND mis DEGREES FAHRENHEIT DEGREES CELCIUS APPENDIX B BATTERY REPLACEMENT y REMOVE BATTERY COVER f f A REMOVE TWO SCREWS f Pacer Instruments Inc www pacer instruments com Page 11 of 28 DA430 User Manual PN 10140 Rev 1 8 10 Jun 2008 Copyright 2008 Pacer Instruments Inc Phone 603 352 0187 603 352 1036 Fax sales pacer instruments com PACER INSTRUMENTS PO Box 726 60 Dunbar Street Keene NH 03431 USA APPENDIX C AIRFLOW VOLUME CALCULATIONS To calculate cubic feet per minute CFM from a measured air velocity FPM you need the calculated cross sectional area of the air flow st
6. ALIBRATION To maintain your instrument in top working order we recommend that you send it back to us for calibration each year beginning one year after purchase Our calibration services include ensuring the instrument performs within its accuracy tolerance making any necessary adjustments and inspecting all aspects of the instrument s functionality so that you Il have another year of dependable service Calibration also includes a complimentary firmware upgrade so that you know you Il have the latest advances in accuracy and reliability in your instrument NIST Traceable multi point calibration is also available from the factory We can offer precise calibration tailored to your specific measurement needs using our state of the art facilities and calibration equipment Please contact us or visit our website for the latest information on calibrating your instrument DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 24 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Notes DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 25 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352
7. Air Velocity in Feet per Minute multiply by 2000 4O Or gt For example an analog output of 2 375 Volts on the green wire means that Q the instrument is measuring an air velocity of 4750 feet per minute FPM 2 375 Volts x 2000 4750 FPM RH leat Resistor ANALOG QUTPUT CONNECTOR To convert from Volts to Percent Relative Humidity RH multiply by 20 sal PINOUT DIAGRAM gt For example an analog output of 3 722 Volts on the gray wire means that the instrument is measuring a relative humidity of 74 44 RH gt 3 722 Volts x 20 74 44 RH a a 560 Om Mating Cable Connector To convert from Volts to Temperature in degrees Celsius C multiply by 20 a esaa cr A a Output and subtract 20 gt For example an analog output of 3 458 Volts on the white wire means that the instrument is measuring a temperature of 49 16 C gt 3 458 Volts x 20 20 49 16 C DA430 User Manual PN 10140 Pacer Instruments Inc DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 13 of 28 Copyright 2008 Pacer Instruments Inc Page 14 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com APPENDIX E USB DATA OUTPUT IF EQUIPPED If the instrument is equipped with the USB Communica
8. Connection Enter a name and choose an icon for the connection Name Pacer DA400 Icon 3 8 AB 3 Click OK DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 18 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com On the next window next to Connect using select the COM port you that you are using with your instrument Click OK Connect To xz Pacer DA400 Enter details for the phone number that you want to dial Country region Area code Phone number Connectusing e v re In the next window select the port settings as shown below and click OK The Serial Port settings are also listed at the end of this section COMS3 Properties Port Settings Bits per second 9600 Data bits 8 Parity None Stop bits 1 Flow control RCIE v Restore Defaults DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 19 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Click on File Properties You will see the window shown below C
9. M 3 6 16 IAPPED HOLE 0 75 INCH DEEP mn o m POA 21 0 inch 25mm KOO a 7A RY P 2 WY Ne inceh eS 28 mm S 5 5 inches as 140 mm CABLE ATTACHED 5 FEET LONG 1 5 meters TERMINATED WITH CONNECTOR FOR ATTACHING TO INSTRUMENT HTP202 PROBE 925inch _ 6 09 inch i 23 5 mm 155 mm DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 6 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com SECTION 2 SWITCH FUNCTIONS a lt lt WY SAMPLE RATE O mT io o lt i e Pressing the ON OFF key switches the instrument ON Hold down the key for 2 seconds to switch the unit OFF The unit will automatically power off after 30 minutes without any key presses To disable auto power off hold down the power button during turn on The unit will flash AOFF which means that the auto power off has been disabled The auto power off is re enabled each time the instrument is turned on wu Press the BACKLIGHT key to turn the LCD backlight on for 30 seconds To turn the backlight on permanently hold the backlight key down for 3 seconds The LCD will flash The backlight is now switched on permanently To switch the backlight off press the back
10. OSEL An average value of airspeed measurements during the preceding 8 seconds is displayed B 5 An average value of airspeed measurements during the preceding 16 seconds is displayed The sample rate for temperature and humidity readings is always 2 seconds DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 8 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com for either temperature humidity or air velocity The maximum reading display will alternate with the letter H displayed with the sample rate Press the MAX MIN key again to record and hold the minimum reading The minimum reading display will alternate with the letter L displayed with the sample rate Press the MAX MIN key to record and display the maximum reading MIN For example 65 alternating with H 4 signifies that 1065 is the highest airspeed reading since the MAX MIN key was pressed and the sample rate is set to 8 seconds He alternating with L IB signifies that 82 is the lowest airspeed reading since the MAX MIN key was pressed and the sample rate is set to 16 seconds To exit MAX MIN mode press the SAMPLE RATE key HoLD Press the HOLD RESET key to freeze the current reading on the A display HOLD is displayed on the LCD and the reading is
11. age 4 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Options Available e Protective Boot and Splash Proof Seal for the Instrument USB Communications RS232 Communications Analog 0 5 Volt Output Additional Probes AP275 AP100 HTP202 Extra extension and or flexible rods Custom cable lengths Immersion RTD temperature probe Surface RTD temperature probe Air RTD temperature probe Included 1 DA430 Instrument 1 Vane type probe head choice of AP100 or AP275 1 HTP202 combination RH temperature probe 3 Rigid extension rods with handle grip 1 Flexible extension rod 1 Probe connection cable 5 ft 3 Size AA 1 5V alkaline batteries 1 Hard shell carrying case with foam liner 1 DA430 operation manual Dimensions INSTRUMENT 6 26 Inch 1 32 Inch 160 mm 34mm 3 07 Inch 78mm DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 5 of 28 AP275 PROBE AP100 PROBE PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com NEPRE BOSS WITH 2 75 INCH 3 8 16 UNC TAPPED HOLE 70 MM 750 INCH DEEP ELECTRICAL CONNECTOR 875 INCH 22 MM 4 9 INCH n 1 7 010 INCH TO 43 MM 124 M
12. ent is equipped with the analog output option there will be a five analog output voltage This is in addition to the normal measurement error pin connector on the bottom of the instrument Also an analog output cable will gt For example an air velocity reading of 500 FPM would normally have an be included with the instrument This cable will have a five pin connector on accuracy of 1 of reading 1 digit 6 FPM when the data is viewed one end and four tinned wires on the other end on the LCD display l gt With the additional error associated with the analog output voltage the The instrument will output a Voltage between 0 and 5 Volts that corresponds to effective accuracy of the analog output for this air velocity measurement the Air Velocity Temperature and Humidity measured by the instrument The will be 2 of reading 1 digit 11 FPM output range pin assignments and wire colors are given in the table below Also shown is a block diagram of the analog output circuit Custom Analog Voltage Outputs are also available contact Pacer for details Corresponding wine Analog Output Measurement PANO toconveri Momi Analog Output circuit block diagram and connector pin assignment Color Pin Function Voltage Range Range Volts V to Measurement Value Air Velocity 0 to 5 Volts 0 to 10 000 FPM Air Velocity 2000x V Temperature 20 10 80 C_ Temperature C 20xV 20 Pete otage Output O To convert from Volts to
13. held Press the HOLD RESET key a second time to clear this mode and return the unit to normal operation Press the HOLD RESET key while in MIN MAX mode to display BOTH the minimum and maximum readings since the MAX MIN key was pressed Once the HOLD RESET key is pressed while in MAX MIN mode new readings are no longer recorded To return to MAX MIN mode press the HOLD RESET key again DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 9 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com SECTION 3 OPERATIONAL NOTES omne JLL Out of Range Error If the HTP202 probe is exposed to temperatures or humidity levels outside of its range see Section 1 Specifications the T instrument will display FUL when the instrument is displaying either temperature or relative humidity This is the out of range error This error will also be displayed if the instrument is turned on without the HTP202 probe attached and the reading is set to either temperature or relative humidity The humidity sensor will not read correctly if it is exposed to condensation If the HTP202 probe is stored in a cold environment and is then exposed to a warm humid environment while the probe is still cold condensation will form on the humidity sensor The
14. icrosoft Excel or OpenOffice Calc allows the data to graphed or recorded The simplest way to export the instrument data is to use a terminal emulator program like Windows HyperTerminal and either capture the serial data text to a file menu selection or to manually highlight copy and then paste the instrument data into an editor such as Windows Notepad Once you have the instrument data in a file save the file as a CSV type e g InstrumentData csv Open the file in a soreadsheet application such as Microsoft Excel or OpenOffice Calc A graph of the data as shown below can now be generated LAL Se f Air 0 FPM 2 Air 74 FPM Pacer DA400 Air Velocity 3 Air 141 FPM 4 Air 156 FPM 5 Ajr 141 FPM 6 Air 128 FPM 7 Air 115 FPM BAr 106 FPM 9 Air 96 FPM 10 Air 90 FPM 11 Air 84 FPM a 12 Air 77 FPM 43 Air 74 FPM 14 Air 71 FPM E 15 Air 65 FPM gt 16 Air 62 FPM 17 Air 59 FPM 18 Air 55 FPM 19 Air 52 FPM 20 Air 49 FPM 21 Air 46 FPM 22 Air 43 FPM 2 39 lt lt 6 FF 8 S MO 1 12 13 Te AS AG AT 18 49 220 21 22 23 24 23 Air 43 FPM Sample Humber 24 Air 0 FPM DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 23 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com C
15. lick on the Settings tab and then click on ASCII Setup as shown below Pacer DA400 Properties Connect To Settings Function arrow and ctrl keys actas Terminal keys Windows keys Backspace key sends Crk H Del Cth Space Ctr H Emulation Auto detect v Telnet terminal ID ANSI Backscroll buffer lines 500 C Play sound when connecting or disconnecting Input Translation ASCIl Setup Make sure that Append line feeds to incoming line ends is CHECKED as shown below Click OK ASCII Setup ASCII Sending _ Send line ends with line feeds _ Echo typed characters locally Line delay 0 milliseconds Character delay 0 milliseconds ASCII Receiving Append line feeds to incoming line ends Wrap lines that exceed terminal width DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 20 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com You will now receive data from your instrument The graphic below shows the serial port output data from Windows HyperTerminal when connected to a Pacer DA400 Instrument Pacer Instrument HyperTerminal File Edit View Call Transfer Help Auto detect 4800 8 N 1 Serial Port Settings Bits per Second Baud 9600 Data bit 8
16. light key again DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 7 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com OF Press the TEMPERATURE key to display the current air temperature C as measured by the HTP202 Combination Probe To switch the units between degrees Fahrenheit F and degrees Celsius C press the TEMPERATURE key again Either C or F will be displayed along with the reading Press the PERCENT RELATIVE HUMIDITY key to display the a percent relative humidity in the ambient air as measured by the HTP202 Combination Probe RH will be displayed along with the reading FPM f Press the FPM MPS key to display the current air velocity as measured MPS by the air probe To switch the measurement units from FPM feet per minute FPM resolution to MPS meters per second 0 01 MPS resolution press the FPM MPS key again Either FPM or MPS will be displayed along with the reading Press the SAMPLE RATE key to change the measurement averaging RATE f rate sample rate of the instrument for air velocity only CSEL An average value of airspeed measurements during the preceding 2 seconds is displayed HSEL An average value of airspeed measurements during the preceding 4 seconds is displayed H
17. n RS232 port on your computer STEP 3 Turn the Instrument ON STEP 4 Verify that the Instrument has been set up as a RS232 Serial Port with a unique COM port number You only need to do this once For Windows users open the Windows Device Manager found in Control Panel and verify that a serial port exists You are now ready to capture the data being measured by your instrument Please refer to Appendix F Viewing and Capturing Data for further instructions DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 17 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com APPENDIX G VIEWING AND CAPTURING DATA IF EQUIPPED WITH EITHER USB OR RS232 OUTPUTS There are many ways to capture the serial port data from the Pacer Instrument The simplest method is to use a terminal emulator program Using a terminal emulator allows the serial COM port to be opened with the above port settings and real time data to be viewed from the instrument One such terminal emulator program is Windows HyperTerminal To launch Windows HyperTerminal go to START All Programs Accessories Communications HyperTerminal Enter a name for the Connection such as Pacer DA400 and choose an icon Connection Description New
18. r probe high reliability and long life DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 2 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA 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 Instruments Inc PO Box 726 60 Dunbar Street Keene New Hampshire 03431 USA 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 Instruments 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 assume liability for any damages that result from the use of the products in accordance with the information contained in the manual DA430 User Manual PN 10140 Pacer Instr
19. ream Volume Flow CFM Velocity FPM X Area sq ft In a rectangular duct this cross sectional area equals the Width times the Height u W x H A cross sectional area In a circular duct this cross section area equals the radius squared times n 3 14 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 The air duct is rectangular the width is 24 in and the height is Example 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 Pacer Instruments Inc www pacer instruments com Page 12 of 28 DA430 User Manual PN 10140 Rev 1 8 10 Jun 2008 Copyright 2008 Pacer Instruments Inc PACER PACER INSTRUMENTS INSTRUMENTS PO Box 726 Phone 603 352 0187 PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Keene NH 03431 USA sales pacer instruments com APPENDIX D ANALOG OUTPUTS IF EQUIPPED Note When using analog outputs there is an additional 1 error in the If the instrum
20. tions option there will be a four pin male connector on the bottom of the instrument Also a USB cable will be included with the instrument This cable will have a four pin female connector on one end and a USB Type A connector on the other end USB Data Output Instructions for Use STEP 1 Install a Virtual COM Port VCP Driver on your computer Free VCP drivers can be downloaded for Windows Linux and MAC from FTDI Ltd on their website http www ftdichip com Drivers VCP htm We recommend downloading the setup executable which automatically runs and configures the drivers for you STEP 2 Connect the USB cable included to the male connector on the bottom of your instrument Connect the other end to a USB port on your computer STEP 3 Turn the Instrument ON STEP 4 Verify that the Instrument has been set up as a USB Serial Port with a unique COM port number You only need to do this once For Windows users open the Windows Device Manager found in Control Panel and verify that a USB serial port exists as shown below DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 15 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com Device Manager File Action View Help amp 2 a PRIDELAPTOP ui Batteries
21. uments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc Page 3 of 28 PACER INSTRUMENTS PO Box 726 Phone 603 352 0187 60 Dunbar Street Fax 603 352 1036 Keene NH 03431 USA sales pacer instruments com SECTION 1 SPECIFICATIONS Ranges Air Probe AP275 40 to 7800 ft min feet per minute 0 2 to 40 00 m sec meters per second Air Probe AP100 60 to 6800 ft min 0 3 to 35 00 m sec Relative Humidity RH 5 0 to 95 0 RH Temperature using combination HTP202 probe 4 to 176 F 20 to 80 C Temperature using optional RTD probe 148 to 1112 F 100 to 600 C Accuracy Air Velocity 1 0 of reading 1 digit Relative Humidity 2 0 RH Temperature 0 3 C 0 2 of reading in C Temperature accuracy examples 0 3 C at 20 C 0 5 F at 68 F Resolution Air Velocity 1 ft min or 0 01 m sec Relative Humidity 0 1 RH Temperature 0 1 F or 0 1 C 1 F below 99 0 F Operating Temperature Instrument 32 to 125 F 0 to 50 C Air Probes 22 to 212 F 30 to 100 C HTP202 Probe 4 to 176 F 20 to 80 C Power Supply 3 AA alkaline batteries Battery Life Approx 150 hours without backlight Battery check Automatic low battery display Display 0 5 LCD 4 digits with LED backlight DA430 User Manual PN 10140 Pacer Instruments Inc Rev 1 8 10 Jun 2008 www pacer instruments com Copyright 2008 Pacer Instruments Inc P
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