User Manual CFM/CMM Vane Thermoanemometer - Cole
Contents
1. Battery Replacement When the low battery icon appears on the LCD the three AAA batteries must be replaced 1 Disconnect the sensor 2 The battery compartment is located on the back of the instrument The plastic cover must be removed with a screwdriver 3 Replace the three AAA batteries 4 Close and rescrew the plastic cover 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 INNOCAL 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 cA Cole Parmer Delivering Solutions You Trust Toll Free 1 800 323 4340 Phone 1 847 549 7600 Fax 1 847 247 2929 ColeParmer com Digi Sense 1065DGMAN_20250 14 Rev 1 Toll Free 1 800 358 5525 Phone 1 847 327 2000 Fax 1 847 327 2700 Davis com Digi Sense Manual Part No 00100 532. used to select memory locations 5 4 LCD 5 Power on off button 6 C F button Press to unlock the dis J play Press to switch between C and F units Meter will beep three times to indicate change 7 UNITS button Press to select the mode of operation In VEL mode the meter displays air speed In FLOW mode the meter displays air volume 8 HOLD button Press to freeze the displayed velocity and flow reading Press again to unlock Hold function e E Low battery indicator e C F temperature units of measure e REC indicates that min max function is run ning air velocity or airflow measurement e MAX maximum hold for air velocity or airflow measurement MIN minimum hold for air velocity or airflow measurement e AVG air averaging mode e HOLD data hold for air velocity or airflow measurement e VEL indicates that meter is in air velocity mode e FLOW indicates that meter is in airflow mode AREA me ft units for area dimensions e m s ft min km h MPH knots air velocity units of measure e CFM CMM airflow units of measure e X10 X100 multipliers for air flow readings Setup and Operation Connecting the Vane Smaller LCD digits at top right of display for probe temperature piri REC MAX MIN AVG Ge VEL FLOW AREA aa m s ft min km h Xio MPH knot
3. User Manual D DIGI SENSE CFM CMM Vane Thermoanemometer with NIST Traceable Calibration Model 20250 14 REC MAX MIN AVG ABAD m s ft min km h Xi MPH knots CFM CMM ce THE STANDARD IN PRECISION MEASUREMENT Introduction The Digi Sense CFM CMM Vane Thermoanemometer Model 20250 14 measures air velocity airflow volume and temperature The large easy to read backlit LCD includes primary and secondary displays plus numerous status indicators The meter features 2 memory locations 1 for CFM and 1 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 Three AAA batteries 4 User manual 5 NIST traceable calibration report with data Meter Descripti 1 BACKLIGHT button Press to turn the backlight on and off 2 MAX MIN button Use to record and 1 store the highest lowest and average air velocity or airflow readings 254 3 AREA button Press and hold to manually enter the area of a duct in CFM or CMM mode In AREA mode
4. in 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 32 to 122 F 0 to 50 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 Custom 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 7 oz 200 g Meter 634 x 21 2 x 1 16 x 6 2 x 2 1 cm Vane sensor head 234 7 cm diameter Cable length 3 9 ft 1 2 m Three AAA batteries Typically 40 hrs Battery life will be reduced significantly if the backlight is used continuously Approximately 8 3 mA DC Mai Recalibrati Repai
5. ith 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 Now only REC is displayed and the meter will continue 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 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 the BACKLIGHT button while turning the meter on 3 dis APO will appear in the display The Auto power off feature will now be disabled Note Auto power off is re enabled each time the meter is turned on Also note that Auto power off is disabled in CFM CMM or Average mode 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 m
6. reviously entered Place the sensor in the air stream Ensure that the air enters the vane as indicated by the arrow sticker placed inside the vane Refer to the diagram The large main LCD display shows the Air Velocity reading The upper right LCD subdisplay shows the temperature reading The meter has 2 memory locations 1 for CFM and 1 for CMM that can be used to store commonly used area sizes that you can recall at anytime 1 Press the AREA button until meter beeps twice The leftmost digit of the bottom display will begin to flash Press the MAX MIN button to move the decimal point Use the UNITS button to change the value of the first flashing digit 0 9 Press the HOLD button to move to the next digit Side view of Vane a Arrow lt lt Airflow lt lt 5 After all of the digits are entered press and hold the AREA button until it beeps twice to save the setting into memory and return to CFM or CMM measuring mode Data Hold Air Velocity Airflow 1 While taking measurements press the HOLD button to freeze the air velocity air flow reading 2 The HOLD indicator will appear in the middle of the LCD 3 Press 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 the MAX MIN button The MAX indicator and REC indicator along w
7. s CFM CMM Large LCD digits at bottom of display for air velocity and airflow 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 2 Turn the plug carefully until it lines up with the jack and then firmly push the plug into place Do not apply undue force or try to twist the plug side to side 3 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 Set Operati Air Velocity 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 meter will dis play the last unit of measure previously entered Place the sensor in the air stream Ensure that the air enters the vane as indicated by 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 tempera ture reading Airflow Measurements CFM CMM 1 2 Turn on the meter using the On Off button Side view of Vane Arrow r Airflow _ 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 p
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