User Manual
Contents
1. Standard Remote Sensor Head Options 12 mm 072 Low Plastic XS E wand Profile Blade w flange Gown 7mm A sit __ 4 5 g E pg A S J Z SI n i m v 50 mm 2 100 mm 4 gt 150 mm 6 LI 2 j 28 3 mm gir s AccuSense F900 Part Numbering Identifying the part number F900 V A B S L V_ Velocity Range 2 2 m s 5 5 m s 10 10m s A Accuracy 5 25 of reading 1 of full scale 10 210 of reading 1 of full scale B Body Type 0 Standard default short tube 1 Long tube for extended sensor heads S Remote Sensor head options applies only if B 1 0 Plastic Low Profile 50 mm 2 SS Wand with Flange 4 100 mm 4 SS Wand with Flange 6 150 mm 6 SS Wand with Flange 9 XS Sensor Head L Length of cable 2 meter shielded cable from tube to remote sensor head Airflow Sensor Ten perature Sensor 91 mm 3 5 8 4 Sensor Head Acceptance Angles Standard 30 Rod with flange 30 Plastic 30 Low profile 45 XS Blade 60 Length of cable from tube to connector is 300 mm 12 inches www degreeC com MNOO1 A F900 Block Diagram Power Airflow Sensor Digital Link Temperature Sensor Analog Output MNOO1 A www degreeC com AccuSense F900 Specifications Electrical Specifications Standard medium is air at standard pressure 12. Se nso 44 25 mm 1 3 4 26 mm 1 1 32 68 mm 2 3 4 ROD _ _ Lengths sia 60 mm 2 3 8 30 mm 1 3146 See Table 1 gt i a Airflow Sensor 73 mm 2 7 8 Temperture Sensor ji 7 mm fe mm 12 1 4 frei Airflow Temperture Sensor Sensor 3 mm peer 332 Low XS IN Profile Plastic Blade as 7mm To Sensor 3 6 mm 1 4 4 mm bic Head a a ii e Airflow 91 mm 3 58 _ gt amp me Sensor 20 mm 20 mm lemperawre 13167 E 13 16 eda Table 1 Available Rod ALUM Lengths 50 mm 2 100 mm 4 25 mm 1 150 mm 6 L 4 mum 158 ed Connector The F900 uses an AMP 5 pin connector part number 22 01 2057 For non standard cable lengths Plastic Base and custom connector options please contact DegreeC MN001 A www degreeC com AccuSense F900 Serial Data Input Output User Spec Electrical Protocol The Digital Input Output is RS232 without the level shift With 5 Volt logic Placing a external RS 232 level shift makes the device fully RS 232 compliant Without the level shift the customer may hook the digital Input Output pins directly to their UART universal asynchronous receiver transmitter or microprocessor Connection Via Serial Terminal The sensor may be connected via a serial terminal program such as Hyper terminal minicom or Procomm Serial port settings are 19200 BPS 8N1 Eight data bits no pa
3. 01 3 kPa 29 95 Hg For altitude compensation and use with other gases please contact AccuSense Supply Voltage 7 13 VDC Supply Current 40 75 mA Current Loop Load 200 ohm minimum 10K ohm nominal on voltage output Time Constant 100 200ms Warm up Time lt 5 seconds Repeatability 21 C 1 of reading Operating Temperature 0 70 C 32 158 F Storage Temperature 10 100 C Output Pin Configuration PIN 1 Supply Return PIN 2 Supply 7 13VDC PIN 3 Analog Airflow output 0 4 for calibrated range to a max of 4 9vdc beyond calibrated range PIN 4 Digital output from F900 19200 BPS RS232 protocol TTL level 8 bit 1 stop bit PIN 5 Digital output to F900 19200 BPS RS232 protocol TTL levels 8 bit 1 stop bit Measurement Specifications Airflow Option 1 15 35 C Greater of 5 of reading or 0 05m s accuracy 10 fpm or 1 of full scale Option 2 10 60 C Greater of 10 of reading or 0 05m s 10 fpm or 1 of full scale Temperature 0 70 C 1 5C above 1 m s 200 fpm 2 5 degreec accuracy below 1 m s 200 fpm Gas Measurement The F900 can be exposed to inert gases such as helium and nitrogen Please contact customer service for density corrections MNOO1 A www degreeC com Mechanical Specifications Standard Bracket Standard Tube and Probe Head 9 50 mm 3 8 60 mm 2 3 8 30 mm 1 3 16 a 1 Airflow Sensor Temperture 12 00 mm 1 2 73 mm 2 7 8
4. CAMBRIOGE ACCUSENSE AccuSense F900 Air Velocity and Air Temperature Sensor User Manual degree DEGREE CONTROLS INC 18 Meadowbrook Drive Milford NH 03055 Tel 603 672 8900 Toll Free US only 877 DEGREEC Fax 603 672 9565 www degreeC com mailto customer service degreeC com 1 MNOO1 A www degreeC com Table of Contents DegreeC Warranty Information Introduction F900 Notices Warnings and Cautions Sensor Head Options amp Acceptance Angles Part Numbering Block Diagram Specification Electrical Measurement Range Mechanical Serial Data Input Output User Spec F900 Interface Board www degreeC com Page 3 Page 4 Page 5 Page 6 Page 6 Page 7 Page 8 Page 8 Page 8 Page 9 Page 10 Page 12 MNOO1 A DegreeC Warranty Information Warranty DegreeC warrants its products to be free from defects in material and workmanship for a period of one 1 year from date of shipment This is the only warranty made by DegreeC and can be amended only by written instrument signed by a duly authorized employee of DegreeC located in DegreeC s plant DegreeC s warranty herein above set forth shall not be enlarged waived diminished or affected by and no obligation or liability shall arise or grow out of DegreeC s rendering of technical advice or service in connection with Buyer s order or the goods furnished hereunder This warranty is invalid if the products have been misused modified adjusted or otherwise operat
5. e borne by the Buyer If preferred Buyer may return goods to DegreeC s manufacturing plant with shipment both ways at Buyer s expense for repair work Parts returned damaged due to poor or insufficient packaging by the Buyer will not be accepted for service unless otherwise agreed Any time parts are returned where no problems are found a service handling charge which will reflect the labor to test and verify the parts as well other incurred expenses will be borne by the Buyer In no event shall DegreeC be liable for incidental or consequential damages including but not limited to costs or removal and reinstallation or such goods goodwill overhead expenses loss of profit and loss of use The remedies are available only to the original Buyer Buyer agrees to accept billing for service expense for service call resulting from other than a DegreeC goods failure or other DegreeC fault Modification of Terms and Conditions No addition to or modification of any of the provisions herein shall be binding upon DegreeC unless made in writing and signed by a duly authorized employee of DegreeC located in DegreeC s plant Disclaimer Due to design changes and product improvements information in this manual is subject to change without notice DegreeC reserves the right to change hardware and or software design at any time which can affect the contents of this manual MNOO1 A www degreeC com AccuSense F900 Air Velocity amp Air Temperat
6. eb site for the representative or distributor in your area MNOO1 A www degreeC com F900 Notices Warnings and Cautions NOTICES WARNINGS and CAUTIONS Below are important notices and safety instructions Please read carefully and follow all warnings and instructions marked on the sensor and in this manual NOTICE DO NOT PLUG IN LIVE ALWAYS TURN POWER OFF PRIOR TO CONNECTING AND DISCONNECTING A SENSOR FAILURE TO DO SO CAN DAMAGE SENSORS AND IS NOT COVERED UNDER DEGREEC S WARRANTY NOTICE DO NOT TRY TO REPAIR AN F900 SENSOR YOURSELF THERE ARE NO CUSTOMER SERVICEABLE PARTS INSIDE OPENING THE CASE VOIDS DEGREEC S WARRANTY CAUTION Avoid exposing the Sensor to dust water and condensing humidity Water can cause shorts corrosion and at a minimum inaccurate readings CAUTION Avoid exposing the device to direct sunlight or other heat sources Do not store the equipment inside a car or trunk exposed to direct sunlight WARNING The sensor is not rated as explosion proof or intrinsically safe WARNI NG The AccuSense F900 Sensor Series is designed for room air velocity measurement only Air containing chemicals for example hazardous gases may damage the sensor head permanently Substances in the air or other gases can change the air s properties and cause a sensor s calibration to be inaccurate www degreeC com MNOO1 A AccuSense F900 Sensor Head Options amp Acceptance Angles F900 Sensor Head Options
7. ed outside specifications Remedies and Damages If the goods furnished by DegreeC fail to conform with the warranty set out above DegreeC s sole and exclusive liability shall be at DegreeC s option i to repair or replace any such goods as hereinafter provided or ii to credit Buyer s account for any such goods upon their return by Buyer and for transportation charges prepaid by Buyer provided that a DegreeC is promptly notified in writing upon discovery of such defects by Buyer with a detailed explanation of any alleged deficiencies and b DegreeC s examination of such unit shall disclose to its satisfaction that such defects have not been caused by misuse neglect improper installation repair alteration accident use of the equipment not meeting DegreeC s specification or any cause beyond the range of normal usage Under no circumstances shall DegreeC be liable for loss of profits loss of use or consequential damages of any kind arising in connection with the use or inability to use our products DegreeC s liability shall be for the above periods from date of shipment to original Buyer unless otherwise stated Returns Within the above time period any part of the goods that prove to be defective in material or workmanship may be repaired or replaced on an exchange basis with a new or functionally operative part free of charge After such warranty period any labor travel time transportation and subsistence expense shall b
8. rity 1 stop bit Valid Serial Commands The F900 series works in polled mode as a slave It will only respond to requests for information E Command The E command will provide the time velocity and temperature Example EE 21 11 35 32 0 000 18 77 CRC 0xDE4 HH MM SEC velocity in m s Temp in degrees C CRC16 value HH is hours since sensor power on MM is minutes SEC is seconds NOTE The part after the decimal point is 64ths of a second not 100ths Velocity is in meters per second Temp in Degrees C the terminates the data The CRC16 value provides the CRC value of the data up to and including the It does not include the E that would be echoed back to you if the echo is on the echo would come back before the data V Command The V command will output velocity and temperature data Example lt SD gt lt VEL Units m s gt 1 234 lt VEL gt lt TEMP Units C gt 21 5 lt TEMP gt lt SD gt CRC 0x1234 The V command provides the CRC 16 Value of the all data of the lt SD gt through lt SD gt X Command is provides backwards compatibility to Accutrac version 4 0 and higher Format is 10 MNOO1 A www degreeC com Hour Minute Seconds Fraction_64 Flow_FPM Temp_Deg_C Example X 0 131 12 520 15 00 The part after the decimal point of the seconds is in 1 64 of a second XML output The sensor output will be in XML format as specified by ISO 8879 http www w3 org XML CRC 16 Val
9. ue The CRC is a CRC 16 that includes all the data including the lt SD gt and the lt SD gt This will include carriage returns CR and new lines linefeed LF Since the CRC16 includes carriage returns and newlines if using a PC you must take care to set you set the serial port in RAW mode No CR gt LF or LF gt CR translation Example code unsigned short int SensorClass CalcCRC16 string CRCData unsigned short cre OxFFFF unsigned short temp unsigned short quick unsigned char byte for unsigned int i 0 i lt CRCData size i byte CRCData il temp crc gt gt 8 byte crc lt lt 8 quick temp temp gt gt 4 ere quick quick lt lt 5 ere quick quick lt lt 7 ere quick return crc 11 MNOO1 A www degreeC com AccuSense F900 Interface Board a SON VOLTAGE ANALOG OUTPUT VOLTAGE 12 MNOO1 A www degreeC com
10. ure Sensor Introduction The AccuSense F900 Air Velocity and Air Temperature Sensor is a product based on DegreeC s thermal anemometer technology In addition to air at ambient pressure conditions it can also be used in other inert gases For details and compensation factors please contact AccuSense The F900 series offers both linearized airflow and air temperature readings taken by separate sensors only millimeters apart which allows simultaneous measurement in real time DegreeC has developed a new temperature compensation algorithm for this OEM sensor which reads airflow accurately from 15 35 C at ambient pressure conditions Applications include biological safety cabinets animal cages process control electronics cooling HVAC and isolation rooms Theory of Operation The AccuSense F900 Sensors use thermal anemometer technology which measures heat loss from a heated device Two thermistors on the sensor head detect airflow and ambient temperature simultaneously The airflow reading is then compensated for temperature within the specified calibration range linearized and made available at the output Each sensor is individually calibrated which makes the F900 fully interchangeable Operator assistance is available weekdays from 9 00 AM to 5 00 PM Eastern Time to provide Customer Service and Technical Support Assistance is also available from AccuSense Sales Representatives and Distributors throughout the world Please check our w
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