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Summary of Contents for Digi-Sense 20250-15
- Page 1 User Manual Professional CFM/CMM Vane Thermoanemometer with NIST-Traceable Calibration Model 20250-15 THE STANDARD IN PRECISION MEASUREMENT...
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Page 2: Meter Description
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. - Page 3 Keypad • POWER Press to turn the meter ON or OFF • MAX/MIN Used to record and store the highest, lowest and average air- flow or velocity readings. (LEFT) also serves as change deci- mal point button in AREA mode •...
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Page 4: Display Layout
Display Layout • REC (top of LCD): indicates that min/ max temperature function is running • MAX (top of LCD): maximum hold function engaged for an air temperature measurement • MIN (top of LCD): minimum hold function engaged for an air temperature measurement Smaller LCD digits at top right of display •... -
Page 5: Setup And Operation
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. 2. Turn the plug carefully until it lines up with the jack and then firmly push into place. - Page 6 Setup and Operation (continued) Airflow Measurements (CFM / CMM) 1. Turn on the meter using the On/Off button. 2. 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.
- Page 7 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.
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Page 8: Battery Replacement
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 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. -
Page 9: Specifications
Specifications 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) - Page 12 Maintenance, Recalibration, and Repair 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.
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