User Manual Professional CFM/CMM Vane Thermoanemometer
Contents
1. Data Hold Air Velocity Airflow 1 While taking measurements press the HOLD button to freeze the air velocity airflow reading 2 The HOLD indicator will appear in the bottom ofthe LCD 3 Press the HOLD button again to return to normal operation MAX MIN AVG Record Air Velocity Airflow This allows the user to record and view the highest MAX lowest MIN and average AVG readings 1 Press MAX MIN button The MAX indicator and RECORD indicator along with the maximum reading will appear on the LCD and the meter will begin keeping track of the MAX MIN and Average values 2 Press the MAX MIN button again to view the minimum reading The MIN indicator along with the minimum reading will appear on the LCD 3 Press the MAX MIN button again to view the average reading The AVG indicator along with the average reading will appear on the LCD Note Average recording will stop automatically after 2 hours and the upper LCD subdisplay will show OFF only in the average mode 4 Press the MAX MIN button again to display current readings Note Meter will keep recording MAX MIN AVG readings 5 To clear and stop MAX MIN AVG recording and return to normal opera tion press and hold the MAX MIN button until the meter beeps twice Setup and Operation continued Automatic Power Off To conserve battery life the meter automatically turns off after 20 minutes To disable this feature 1 Turn the meter OFF 2 Press and hold the2. Backlight button while turning the meter on 3 dis APO will appear in the display The Auto power off feature will now be disabled 4 Note that Auto power off is re enabled each time the meter is turned on 5 Also note that Auto power off is disabled in CFM CMM or average mode Battery Replacement When the low battery icon appears on the LCD the 9 V battery must be replaced 1 Disconnect the sensor 2 Remove the meter s battery cover 3 Replace the 9 V battery 4 Close the battery compartment cover Specificati Air velocity Range Resolution Accuracy m s meters per sec 0 40 to 30 00 m s 0 01 m s 3 0 20 m s ft min feet per minute 80 to 5900 ft min 1 ft min 3 40 ft m km h kilometers per hour 1 4 to 108 0 km h 0 1 km h 3 0 8 km h MPH miles per hour 0 9 to 67 0 MPH 0 1 MPH 3 0 4 MPH knots nautical MPH 0 8 to 58 0 knots 0 1 knots 3 0 4 knots Airflow Range Resolution Area CFM cubic feet per min 0 to 999 900 ft min 0 001 to 100 0 000 to 999 9 ft CMM cubic meters per min 0 to 999 900 m min 0 001 to 100 0 000 to 999 9 m Air temperature Range Resolution Accuracy 14 to 140 F 10 to 60 C 0 1 F C 4 0 F 2 0 C Circuit Display Sampling rate Sensors Automatic power off Operating temperature Operating humidity Storage temperature Storage humidity Weight Dimensions Power Battery life Battery current Cus
3. you have selected the desired memory location enter your dimension Use the A UP button to change the flashing digit Use the LEFT button to move the decimal Use gt RIGHT button to select the other digits After all of the digits are entered press and hold the AREA button until it beeps twice to save the area into memory and return to CFM or CMM measuring mode To select and use a previously stored dimension press and hold the AREA button until it beeps twice 1 Press NEXT to scroll through the 8 memory locations Press and hold the AREA button until it beeps twice to return to CFM or CMM measuring mode Airflow Averaging Mode 1 To enter the 20 Point Averaging Mode press and hold the AVG button until it beeps twice The AVG icon will be displayed 2 Take a measurement and press the AVG button A single beep will sound and the HOLD icon will appear briefly in the display 3 The average reading will be displayed and number of readings measured will appear in the upper right hand corner of the display After 5 seconds the display will return to the current reading 4 Repeat steps 2 3 until the desired number of points have been measured 5 To return to standard airflow measuring mode press and hold AVG button until meter beeps twice Note In the standard velocity measuring mode press the AVG button once to recall the previous average The average will be cleared when you enter the averaging mode again
4. 549 7600 Phone 1 847 327 2000 Fax 1 847 247 2929 Fax 1 847 327 2700 ColeParmer com Digi Sense Davis com Digi Sense 1065DGMAN_20250 15 Rev 1 Manual Part No 00100 54
5. User Manual D DIGI SENSE Professional CFM CMM Vane Thermoanemometer with NIST Traceable Calibration Model 20250 15 THE STANDARD IN PRECISION MEASUREMENT Introduction The Digi Sense Professional CFM CMM Vane Thermoanemometer Model 20250 15 provides precision air velocity airflow volume and temperature measurements The large easy to read backlit LCD includes primary and secondary displays plus numerous status indicators The meter features 16 memory locations 8 for CFM and 8 for CMM to store and recall commonly used area sizes The instrument is fully tested and calibrated to NIST traceable standards Careful use of this meter will provide years of reliable service Unpacking Check individual parts against the list of items below If anything is missing or damaged please contact your instrument supplier immediately 1 Meter 2 Anemometer vane sensor on 3 9 ft 120 cm cable 3 Hard carrying case 4 One 9 V battery 5 User manual 6 NIST traceable calibration report with data Meter Description 1 LCD 2 Vane sensor 3 Temperature buttons 4 Power On Off button An 5 Airflow velocity buttons i Y Sh m 6 AVG 7 Backlight 7 a us 3 2 6 AVG Keypad POWER Press to turn the meter ON or OFF MAX MIN Used to record and store the highest lowest and average air flow
6. e Low battery indicator AREA ft m units for area dimensions VEL indicates that meter is in air velocity mode e FLOW indicates that meter is in airflow mode e CFM CMM airflow units of measure m s ft min km h MPH knots air velocity units of measure e X10 X100 multipliers for airflow readings REC indicates that min max function is running top for temp bottom for air MAX bottom of LCD maximum hold function for an air velocity and airflow measurement e MIN bottom of LCD minimum hold function for an air velocity and airflow measurement AVG air averaging mode e HOLD bottom of LCD Data Hold for an Air Velocity and Airflow function Smaller LCD digits at top right of display for probe temperature REC MAX MIN 0000 f m VEL FLOW CFM CMM pogge 0000 REC MAX MIN AVG Large LCD digits at bottom of display for air velocity and airflow Setup and Operation Connecting the Vane 1 The vane plug is inserted in meter s sensor jack at the top of meter The plug and jack are keyed so that the plug can only fit in the jack one way Turn the plug carefully until it lines up with the jack and then firmly push into place Do not apply undue force or try to twist the plug side to side If the vane is not connected to the meter properly or if the sensor is defective the LCD will indicate OL in place of a Temperature reading Air Veloci
7. or velocity readings LEFT also serves as change deci mal point button in AREA mode UNITS Press to select the mode of operation In FLOW mode the meter displays air volume In VELOCITY mode the meter displays air speed A UP also serves as increase num ber button in AREA mode AVG Used to Average multiple read ings in FLOW or VELOCITY mode Up to 20 readings can be averaged e HOLD Press to freeze the displayed reading Press again to unlock dis play This button also functions as the RIGHT scroll button in AREA mode AREA NEXT Press and hold to manually enter the area of a duct in CFM or CMM mode In AREA mode used to select memory locations 1 through 8 X Press to turn the backlight on off MAX MIN Temperature Used to record and store the highest lowest readings for air temperature HOLD Temperature Press to freeze the displayed temperature reading Press again to unlock the display Press and hold for 3 seconds to switch between C and F Meter will beep twice to indicate change Display Layout REC top of LCD indicates that min max temperature function is running e MAX top of LCD maximum hold function engaged for an air temperature measurement e MIN top of LCD minimum hold function engaged for an air temperature measurement e HOLD top of LCD data hold function engaged for an air temperature measurement e C F temperature units of measur
8. s CFM CMM 1 2 Turn on the meter using the On Off button Press the UNITS button to select the desired airflow units CFM cubic feet per minute or CMM cubic meters per minute Note At power up the meter will display the last unit of measure previously entered To begin entering the area in ft or m press and hold the AREA button until it beeps twice The leftmost digit of the bottom display will begin to flash Use the A UP button to change the flashing digit Use the LEFT button to move the decimal Use gt RIGHT button to select the other digits After all of the digits are entered press and hold the AREA button until meter beeps twice to save the area into memory and return to CFM or CMM measuring mode Place the sensor in the air stream Ensure that the air enters the vane as indicated by the arrow sticker Side view of Vane placed inside the vane Refer to the diagram The Arrow large main bottom LCD display shows the airflow e reading The upper right LCD subdisplay shows the temperature reading Airflow The meter has 16 memory locations 8 for CFM and lt 8 for CMM that can be used to store commonly used area sizes that you can recall at any time 1 Press the AREA button until meter beeps twice A memory location number will appear in the top right of the display indicating the memory location Push the NEXT button to scroll through and select the desired location Once
9. tom LSI microprocessor circuit Dual function 16 mm 4 digit LCD Approximately 1 reading per second Air velocity flow sensor Conventional angled vane arms with low friction ball bearing Temperature sensor NTC type precision thermistor Unit shuts off automatically after 20 minutes to preserve battery life 32 to 122 F 0 to 50 C lt 80 RH noncondensing 14 to 140 F 10 to 60 C lt 80 RH noncondensing 1 6 Ib 725 g including battery and probe Main instrument 8 x 3 x 2 20 3 x 7 5 x 5 cm Vane sensor head 2 7 cm diameter Cable length 3 9 ft 1 2 m One 9 V battery Typically 80 hrs Battery life will be reduced significantly ifthe backlight is used continuously Approximately 8 3 mA DC Mai Recalibrati Repai It is recommended that Digi Sense products are calibrated annually to ensure proper function and accurate measurements however your quality system or regulatory body may require more frequent calibrations To schedule your recalibration please contact InnoCal an ISO 17025 calibration laboratory accredited by A2LA INNOCA L INNOVATIVE CALIBRATION SOLUTIONS Phone 1 866 INNOCAL 1 866 466 6225 Fax 1 847 327 2993 E mail sales innocalsolutions com Web InnoCalSolutions com For Product and Ordering Information Contact Davis Cole Parmer el gt Delivering Solutions You Trust Proven Precise Personal Toll Free 1 800 323 4340 Toll Free 1 800 358 5525 Phone 1 847
10. ty Measurements Single Point 1 2 Turn on the meter using the On Off button Press UNITS button to select the desired unit of measure Note At power up the r Arrow meter will display the last unit of measure previously entered Side view of Vane Place the sensor in the air stream Ensure that the air enters the vane as indicated by AEB lt _ lt the arrow sticker placed inside the vane View the readings on the LCD The large main bottom display shows the air velocity reading The upper right subdisplay shows the temperature reading Air Velocity Measurement Averaging Mode 1 To enter 20 point averaging mode press and hold the AVG button until it beeps twice The AVG icon will be displayed Take a measurement and press the AVG button A single beep will sound and the HOLD icon will appear briefly in the display The average reading will be displayed and number of readings measured will appear in the upper right hand corner of the display After 5 seconds the display will return to the current reading Repeat steps 2 3 until the desired number of points have been measured 5 To return to standard velocity measuring mode press and hold AVG button until meter beeps twice Note In the standard velocity measuring mode press the AVG button once to recall the previous average The average will be cleared when you enter the averaging mode again Set Operati Airflow Measurement
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