Large Vane CFM/CMM Anemometer / Psychrometer + CO2
Contents
1. 3 Optional Cone or Funnel attachment icon 4 Units of measure for duct area programming 5 Vane indicator flashes very briefly on power up 6 Display HOLD icon 7 8 1011 42 7 MAX mode icon 9 8 MIN mode icon 9 Recording icon 13 10 Elapsed Timer icon 11 AVG mode icon 12 Battery status icon 13 Unit of measure icons Full list shown Available units of measure icons vary by model 5 AN320 en GB_V1 3 11 15 Operation Air Velocity and Air Volume Measurements 1 Switch the meter ON by pressing the POWER O button momentarily The meter will countdown from 30 to 0 as it performs a self test Press the POWER button again to switch the meter OFF Note that the meter will automatically enter the sleep mode after 20 minutes of inactivity To disable this feature with the meter OFF press and hold the POWER and the U mode buttons for 2 seconds The LCD will display n as it switches ON Now the sleep mode is disabled and the user must press the POWER button momentarily to switch the meter OFF When the meter is ON the upper display can indicate air velocity relative humidity or CO use the U mode button to scroll The lower display digits can indicate air flow dew point temperature wet bulb temperature or air temperature use the L mode button to scroll Place the sensor in the air stream The air must enter the vane from the rear of the meter The Air Temperature Relative humidity and CO2. 14 to 122 F lt 80 RH lt 90 RH 2000m 7000 ft maximum Four 4 AAA 1 5V batteries gt 40 hours 8 3 mA DC approx 725g 1 6 lbs including battery and probe Main instrument 269 x 106 x 51mm 10 6 x 4 2 x 2 Vane inner diameter 100mm 3 94 inches Optional Air Flow Adaptors Round 210mm 8 3 Diameter Square 346 x 346mm 13 6 x 13 6 12 AN320 en GB_V1 3 11 15 Error Messages Error codes and solutions Air Temperature E02 Temperature reading is lower than the low range limit Place the meter in room temperature for 30 minutes If E02 continues send the unit to Extech for repair E03 Temperature exceeds the high range limit Place the meter in room temperature for 30 minutes If E03 continues to appear send the unit to Extech for repair E31 The A to D converter requires replacing Send the meter to Extech Instruments for repair Relative Humidity RH E04 Temperature error corrupted the humidity reading Check the temperature error solution section E11 RH calibration error Send to Extech Instruments for repair E33 RH measurement circuit error Send to Extech Instruments for repair Dew Point DP and Wet Bulb WBT Temperature E04 Temperature or RH error Check temperature or RH error solutions Air velocity E03 Velocity exceeds the high range limit Test the meter using an air velocity that is known to be within the specified range limits Send the unit to Extech for repair
3. 30 m s 0 01 m s 1 5 rdg 0 3 m s fpm feet per minute 40 5900 fpm 1 fpm 1 5 rdg 59 fpm Relative Humidity Range Resolution Accuracy RH 0 1 99 9 RH 0 1 RH 3 RH 10 90 RH 5 RH lt 10 or gt 90 Air Flow Ranges Resolution Area Range 3 0 1 up to 9999 9 5 CMM cubic meters min 0 99999 m min 0 to 99999cm then 1 0 3 0 1 up to 9999 9 gt CFM cubic ft min 0 99999 ft min 0 to 99999in then 1 0 Temperature Ranges Resolution Accuracy Air and Wet Bulb 0 6 C 20 to 50 C 20 to 60 C 4 to 140 F ae 1 2 C 51 to 60 C F C 0 1 C F Dew Point 1 1 F 5 to 122 F 5 to 60 C 23 to 140 F 2 2 F 123 to 140 F co Range Resolution Accuracy 0 9999 ppm f rdg ini 30ppm 5 of r PPM parts per million readings over 5000 are 1 ppm PE from 0 to 5000ppm 11 AN320 en GB_V1 3 11 15 Circuit Display Sampling rate Air velocity flow sensor Temperature Sensor CO Sensor Automatic Power off Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Battery Power Battery Life Battery consumption Weight Dimensions Custom LSI microprocessor Dual function 13 mm 0 5 4 digit LCD 1 reading per second approx Conventional angled vane arms with low friction ball bearing NTC type precision thermistors NDIR CO sensor Auto shut off after 20 minutes to preserve battery life sleep mode 0 C to 50 C 32 F to 122 F 10 C to 50 C
4. available P1 0 Unit and P2 0 AREA Use the up down buttons to toggle between P1 0 UNIT and P2 0 AREA options P1 0 Unit Selection 1 Once in setup mode at the P1 0 UNIT display momentarily press the HOLD button to enter the P1 0 UNIT menu Use either arrow button to switch between metric and imperial units The available units are air velocity m s fom temperature C F air volume CMM CFM and area size cm inch Press HOLD momentarily to return to the P1 0 display Press either arrow button to move to the P2 0 AREA option and follow the steps below P2 0 Area Size Selection enter square inches or square centimeters 1 5 In setup mode from the P2 0 AREA display press HOLD to enter the AREA setting menu The LCD will show 99999 in the lower display with the first digit flashing Use the up arrow button change the flashing digit from 0 through 9 Use the down arrow button to move to the next digit Use the up arrow button again to change the flashing digit Continue in this way until the desired AREA value is displayed Press the Hold button again momentarily to store the value and to return to the P2 0 display Press either arrow button to move to the P3 0 RH OFFSET option and follow the steps below P3 0 Relative Humidity RH Offset Selection 1 When in setup mode P3 0 press HOLD to enter the RH offset setting The LCD will show 0 0 RH in the upper display Press U mode to increase
5. centimeters must be converted to feet or meters before using these formulae Unit of Measure Conversion Table m s ft min knots km h MPH 1 m s 1 196 87 2 24 1 ft min 0 00508 1 0 01138 1 knot 0 5144 101 27 1 1523 1 km h 0 2778 54 69 0 6222 1 MPH 0 4464 87 89 0 8679 1 6071 1 Copyright 2014 2015 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form www extech com 14 AN320 en GB_V1 3 11 15
6. sensors are located at the center of the vane on the rear of the meter Read the measurement data on the LCD Air velocity readings are indicated in meters per second m s or feet per minute fpm Temperature readings air dew point DP or wet bulb WBT are indicated in C F Air flow volume is indicated in CFM cubic feet per minute or CMM cubic meters per minute Use the L mode button for lower display and the U mode button for upper display to scroll through the displayed reading options To change between Imperial and Metric units of measure refer to the SETUP Mode section To measure the Air Volume of a duct first measure the duct s area see the Appendix for area calculations and then enter the area value in the meter s SETUP mode in in or cm After the area value has been entered use the L mode button to scroll to the air volume display CMM CFM on the lower digits Place the meter in air stream to measure volume Optional measure Air Volume with an airflow Cone or Square adaptor by first attaching one of the adaptors to the meter the optional cone adaptor kit includes a round and a square cone kit part number AN300 C The meter will automatically recognize that the adaptor is attached to the meter and a cone icon will appear on the display Note regardless of the AREA setting in the SETUP mode the meter will default to the dimensions of the vane opening Ensure that the airflow adaptor is well mounted an
7. EXTECH USER GUIDE INSTRUMENTS Large Vane CFM CMM Anemometer Psychrometer CO Model AN320 Introduction Congratulations on your purchase of the Extech AN320 Vane Airflow Anemometer Psychrometer CO This instrument measures Air Velocity Air Flow volume Air Temperature Relative Humidity Wet Bulb Temperature Dew Point Temperature and CO carbon dioxide The large easy to read backlit LCD includes primary and secondary displays plus numerous status indicators The optional round and square airflow cone adaptors allow for quick air flow volume measurements This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Please visit our website www extech com to check for the latest version of this User Guide Product Updates and Customer Support CAUTIONS Improper use of this meter can cause damage to the meter and personal injury Read and understand this user manual before operating the meter Inspect the condition of the probe and the meter for any damage before operating the meter Repair or replace damage before use If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired This device should not be made available to children It contains hazardous objects as well as small parts that can be accidentally swallowed The meter s batteries and packing material can
8. F and the meter will return to displaying readings in real time MAX MIN Mode The MAX MIN feature records the highest MAX and lowest MIN readings captured since the MAX MIN mode was accessed 1 Press and hold the MAX MIN button for 2 seconds to begin displaying the lowest minimum readings encountered since this mode was accessed The MIN icon will appear at the top of the LCD display indicating that the readings shown are the lowest measured 2 Press and hold the MAX MIN button again for 2 seconds to display the maximum readings encountered The MAX icon will appear on the LCD 3 Press and hold this button again for 2 seconds to return to the normal mode of operation the MIN and MAX icons should switch OFF 4 While viewing the MAX or MIN data use the L mode button to switch the display so that the Air Volume MIN and MAX readings can be viewed also 5 Press and hold MAX MIN for 2 seconds to return to the normal operation mode Multi Point Average Mode 1 From the normal operating mode press the U mode button for 2 seconds to enter Multi Point Average mode the AVG display icon and the associated black dot e will switch ON 2 Press the HOLD button momentarily to record one reading The upper display digits will show the reading s memory location number and the lower display will show the measured value Press the HOLD button again to take and store another reading the memory location number will i
9. also be dangerous to children In the event that the meter is to be unused for an extended period of time remove the batteries to protect against battery leakage Expired or damaged batteries can be hazardous if allowed to come in contact with skin Use suitable hand protection in such cases Do not short circuit batteries or put batteries in fire 2 AN320 en GB_V1 3 11 15 Meter Description Meter Description front Top line LCD display reading Bottom line LCD display reading U mode AVG and up arrow button L mode and down arrow button ON OFF Power and SET button HOLD MAX MIN and left arrow Enter button Unit of measure symbol for lower display row Unit of measure symbol for upper display row LOr 007 ONT BHP IN SES Air Velocity Vane Meter Description rear 10 Air temperature humidity and CO sensors 11 Battery compartment 303 ea I 3 AN320 en GB_V1 3 11 15 Brief Keypad Description Press momentarily to switch the meter ON or OFF Press and hold this button for 2 SET seconds to enter or exit the Setup mode refer to Setup mode section for details HOLD o Press momentarily to freeze the displayed reading HOLD icon switches ON press MAXMIN again momentarily to exit the HOLD mode HOLD icon switches OFF o Press and hold for 2 seconds to display the MIN minimum reading press and hold again to display the MAX maximum reading Press and hold a third time to exit o Thi
10. d locked before taking measurements LCD backlight Press the U mode button to switch ON the LCD backlight The backlight will automatically switch OFF after approximately 10 seconds to conserve battery power Note that the backlighting switches ON automatically when the meter is switched ON by the user 6 AN320 en GB_V1 3 11 15 Relative Humidity Wet Bulb Dew Point Temperature and CO Readings Sensors are built in to the center of the vane rear of meter and are used to measure relative humidity air temperature and CO Wet Bulb and Dew Point temperatures are calculated based on temperature and humidity readings 1 Press U mode to scroll to RH or CO ppm modes The measured relative humidity or carbon dioxide readings will be displayed on the upper LCD digits as selected 2 Use the L mode button to scroll through air temperature dew point temperature wet bulb temperature and air flow volume readings 3 To measure the humidity using an offset reference value please access the Setup mode and input the offset value as described in the Setup mode section The LCD will display the measured value minus the offset value once the offset is programmed in the Setup mode Data Hold Mode 1 Press the HOLD button from the normal operating mode to freeze the current measurement 2 The HOLD icon will appear at the top of the LCD display 3 Press HOLD again to return to normal operation The HOLD icon will switch OF
11. if the E03 error message persists Air volume E03 Reading exceeds the meter s display limit Check that the AREA setting is correct in the Setup Mode E04 Air velocity error Return meter to Extech for repair co2 E01 E33 Voltage too low or CO module error Check if the low battery icon is displayed on the LCD if yes replace with new batteries Try a recalibration or send the unit to Extech for repair if the problem persists Other Errors E32 Memory IC error Reboot the meter and check it again send it to Extech Instruments for repair if the error message persists No display 1 Check that the batteries are making good contact and are aligned for correct polarity 2 Replace batteries Display switches OFF automatically This symptom could be the normal Sleep Mode which switches the meter OFF after 20 minutes of in activity If this is not the Sleep Mode check whether the low battery indicator appears before the LCD attempts to switch ON if yes replace the batteries 13 AN320 en GB_V1 3 11 15 Appendix Useful Equations and Conversions Area equation for rectangular or square ducts Height H Area A Width W x Height H width w Area equation for circular ducts Area A pi x r Where pi 3 14 and r radius x radius Cubic equations CFM ft min Air Velocity ft min x Area ft CMM m min Air Velocity m sec x Area m x 60 NOTE Measurements made in inches or
12. me turn OFF the meter 8 If the calibration fails for any reason please return the meter to Extech Instruments for an evaluation and possible repair 9 AN320 en GB_V1 3 11 15 Battery Replacement When appears on the LCD the AAA batteries must be replaced The battery cover is located on the back of the meter Open the rear battery compartment by carefully pulling down on the compartment s latch The battery compartment cover should be completely removed before proceeding Replace the four 4 1 5V AAA batteries ensuring proper polarity Close the battery compartment before attempting to use the meter PEN R Never dispose of used batteries or rechargeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic equipment Other Battery Safety Reminders o Never dispose of batteries in a fire Batteries may explode or leak o Never mix battery types Always install new batteries of the same type 10 AN320 en GB_V1 3 11 15 Specifications not specified Air Velocity Ranges Resolution Accuracy m s meters per sec 0 2
13. ncrement by one and the current reading will be stored in this new memory location The meter can store up to 19 999 points in memory 3 Press U mode momentarily to see the multi point mean average for all of the readings recorded during the session the eAVG display icon will flash during this process 4 Press L mode to view the average reading for the other available parameters 5 Press U mode momentarily to return to the normal operating mode 7 AN320 en GB_V1 3 11 15 Timed Average Mode 1 From the normal operating mode press and hold the U mode button for 2 seconds to enter the Multi Point Average mode first and then press U mode one more time momentarily to enter the Timed Average Mode the AVG and the elapsed timer icons will switch ON 2 Press HOLD to begin recording The elapsed timer starts as shown on the upper display digits and the clock icon flashes on and off The longest amount of time the meter can operate in Timed Average Mode is 19 999 seconds 3 Press U mode to stop the clock and to calculate the timed average The upper LCD will display the elapsed time and the lower LCD will show the averaged readings The LCD will flash the AVG and the elapsed timer icons 4 Press L mode to view the average for other available measurements 5 Press U mode to return to the normal operating mode Setup Mode Entering Setup Mode Press and hold the POWER SET button for 2 seconds to enter Setup mode Two options are
14. offset value and L mode to decrease offset Pres HOLD once more to return to P3 0 Press and hold the POWER SET button for 2 seconds to return to the normal operating mode 8 AN320 en GB_V1 3 11 15 P4 0 Altitude Pressure Compensation 5 When in setup mode P4 0 press HOLD to enter the pressure compensation parameter The LCD will snow hPA unit of measure hector Pascal or millibar on the lower line and a flashing 4 digit number from 700 to 1990 the default is 1013 hPA which is standard pressure on the upper line 6 Press U mode to increase the pressure value and L mode to decrease it 7 Press HOLD once more to return to P4 0 8 Press and hold the POWER SET button for 2 seconds to return to the normal operating mode Calibration CAUTION Do not calibrate the meter in air with an unknown CO concentration Doing so will result in the meter being calibrated to the standard 400 ppm and could lead to inaccurate results 1 Place the meter in a calibrated environment 2 With the meter OFF press SET HOLD and L mode simultaneously to enter CO calibration mode 3 The meter will run a 30 second countdown and CAL will show in the lower display 4 During calibration a CO reading between 380 420ppm will flash in the upper display 5 Wait for approx 10 minutes for the reading to stop flashing 6 The calibration is now complete and the meter will return to the normal operating mode 7 To abort the calibration at any ti
15. s button is also used in the AVERAGE mode for recording readings one at a time or for a timed recording session and in the SETUP mode for configuring the meter Please review the AVERAGE and SETUP mode sections for details U mode AVG Press momentarily to toggle between ppm CO3 humidity and air velocity readings Press and hold for 2 seconds to access the Multi Point Average and Timed Average modes the AVG icon switches ON Detailed instructions for these modes are provided later in this guide In the Setup mode press to select a category or to increase a value refer to Setup mode later in this guide Limode M Press to toggle the lower display between air temperature air volume wet bulb temperature and dew point temperature readings Also used in the Multi Point Average Timed Average and Setup modes refer to the AVERAGE and SETUP modes sections later in this guide U mode AVG A With the meter switched OFF press and hold these two buttons to disable Auto Power OFF Detailed AUTO POWER OFF Sleep mode instructions are provided later in this guide Ulmode Limode Press all 3 buttons simultaneously to enter the Calibration mode on v Calibration instructions are provided in detail later in this guide 4 AN320 en GB_V1 3 11 15 Display Layout 1 Lower Display digits air volume temperature timer or menu parameter displays 2 Upper Display digits air velocity humidity CO or menu display parameters
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