Digi-Sense - Model WD-20250-23 - Compact Vane Anemometer with NIST Manual

Compact Vane Anemometerwith NIST-Traceable CalibrationModel 20250-23THE STANDARD IN PRECISION MEASUREMENTUser Manual2IntroductionThe Digi-Sense Compact Vane Anemometer (Model 20250-23) measures air velocity in units of m/s, MPH, FPM, KNT, and KPH. Advanced features include an automatic backlight, MAX/AVG readings, and automatic power-off. The instrument is fully tested and calibrated to NIST-traceable standards. Careful use of this meter will provide years of reliable service.UnpackingCheck individual parts against the list of items below. If anything is missing or damaged, please contact your instrument supplier immediately.1. Meter2. One 9 V battery3. User manual4. NIST-traceable calibration report with data Meter Description1. Vane sensor2. Power ON/OFF button3. Auto backlight sensor4. Low-battery indicator5. Figure display6. Units display7. MAX/AVG button8. MAX display9. AVG displayDisplay Layout1. Low-battery indicator2. MAX: Max Hold function engaged for the air velocity function3. AVG: Air averaging mode4. m/s, MPH, FPM, KNT, KPH: Air velocity units of measure1234567891 2 343Setup and OperationTaking measurements1. Turn on the meter using the Power On/Off button.2. Press the MAX/AVG button for three seconds to select the desired unit of measure. Note: At power-up the meter will display the unit of measure pre-viously selected.3. Hold the vane sensor in the area to be tested. Ensure that the airflow enters the vane from the front of the meter and at a 90° angle to the fan. 4. Allow adequate time for readings to stabilize. View readings on the LCD.5. Press the MAX/AVG button once to display the maximum measurement reading. 6. Press the MAX/AVG button twice to enter the measurement averaging mode.Automatic backlightThe automatic backlight sensor is activated by low-light conditions, eliminating the need for the user to manually switch the backlight on.Automatic power-offTo conserve battery life, the meter automatically turns off after 15 minutes. Battery replacementWhen the low-battery icon appears on the LCD, the 9 V battery must be replaced. To replace the battery, remove the battery cover on the back of the instrument by applying a sliding force in the downward direction with your thumb. With the battery cover removed, disconnect the old battery and snap in the new battery. Slide the battery cover back into place.SpecificationsAir velocity Range Resolution Accuracym/s (meters per second) 1.1 to 30.00 m/s 0.01 m/s ±(3% + 0.20 m/s)MPH (miles per hour) 0.9 to 67.0 MPH 0.1 MPH ±(3% + 0.4 MPH)FPM (feet per minute) 80 to 5900 FPM 1 FPM ±(3% + 40 FPM)KNT (knots: nautical MPH) 0.8 to 58.0 KNT 0.1 KNT ±(3% + 0.4 KNT)KPH (kilometers per hour) 0.8 to 108.0 KPH 0.1 KPH ±(3% + 1.0 KPH)Manual Part No. 00100-801065DGMAN_20250-23 Rev.1For Product and Ordering Information, Contact:Toll-Free: 1-800-323-4340 Phone: 1-847-549-7600 Fax: 1-847-247-2929 ColeParmer.com/Digi-SenseToll-Free: 1-800-358-5525 Phone: 1-847-327-2000 Fax: 1-847-327-2700 Davis.com/Digi-SenseSampling rate Approximately 1 reading per second Sensors Conventional angled arms with low-friction ball bearingAuto power-off Unit shuts off automatically after 15 min to preserve battery lifeOperating temperature 32 to 122°F (0 to 50°C)Operating humidity <80% RHStorage temperature 14 to 140°F (–10 to 60°C)Storage humidity <80% RHWeight 4.9 oz (139 g) including battery and probeDimensions 61/2" x 21/8" x 13/8" (16.5 x 5.4 x 3.4 cm)Power One 9 V batteryBattery life Typically 100 hrs. Battery life will be reduced significantly if the automatic backlight is used continuously.Battery current Approximately 6.5 mA DCSpecifications (continued)Maintenance, Recalibration, and RepairIt 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.Phone: 1-866-INNOCAL (1-866-466-6225) Fax: 1-847-327-2993 E-mail: sales@innocalsolutions.com Web: InnoCalSolutions.com