45118

User Manual Model 45118 Introduction Congratulations on your purchase of Extech’s 45118 Mini ThermoAnemometer. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service Mini Thermo-Anemometer Maintenance Battery Replacement If the meter will not power up as usual or the display contrast becomes weak and difficult to read, replace the lithium battery. To do so, turn the battery compartment cover in a CLOCKWISE direction to remove it. The battery will be visible in the battery compartment, observe the position of the battery and replace the new one in the same position. Affix the battery compartment cover by turning it in a COUNTER-CLOCKWISE direction. Dispose of the lithium battery in accordance with local, state, or national waste disposal codes. Vane Impeller Replacement NOTE: The anemometer is very accurate at low and mid-range air speeds. Constant use at very high speeds may damage the impeller’s bearing and reduce over-all accuracy. 1. To replace the impeller, remove the set screw next to the impeller assembly (on the rear of the meter). Twist the impeller assembly counter-clockwise to the "O" (open) position and remove it. Install the new impeller by inserting and twisting the new impeller assembly clockwise then tighten the set screw. Vane impeller Precision thermister LCD display POWER and HOLD key UNITS and MODE key Battery compartment (on rear) Swivel handle and storage case Lanyard holder Impeller set screw (on rear of meter) Meter Description 1. 2. 3. 4. 5. 6. 7. 8. 9. Operation 1. Select the desired units for air velocity and temperature by momentarily pressing the UNITS/MODE key from a powered down condition. The LCD will show temperature units (oC or oF) and Air Velocity units. Press the UNITS/MODE key repeatedly until the desired units are displaying. When finished, press the ON/OFF/HOLD key momentarily to restart the meter with the desired units. Power the meter by pressing the ON/OFF/HOLD key momentarily. The Dual Display will illuminate. The top (larger) display indicates air speed and the lower display indicates temperature. Position the meter so that the measured airflow enters the meter vane from the rear of the meter (opposite side from the front panel logo, part number, etc.). Activate Data Hold (to freeze the most recent display), by pressing and holding the ON/OFF/HOLD key while taking measurements. To return to normal operation, release the key and restart the meter. Max operation: After a measurement session, press and hold the UNITS / MODE key until the MAX icon appears on the lower left-hand side of the LCD. Both the Air Velocity and Temperature indication will represent the highest readings measured since the meter was last powered. Average mode operation: Normally the meter averages readings every 2 seconds. To select 5, 10 or 13 second averaging, first press and hold the UNITS/MODE key until the MAX icon appears. Next, press the key again momentarily and the AVG icon will appear. The 13 second average mode is selected. Now press the key again and the number 5 will appear. Leave it there if an average of 5 seconds is desired. Press the key once more for a 10 second average mode. To return to normal operation press the UNITS/MODE key repeatedly until all lower left-hand icons disappear. Wind chill indicator: Press and hold the UNITS/MODE key until the MAX icon appears. Press the key repeatedly until the WCI icon appears. The temperature display will now factor in the wind chill. To return to normal operation, press the UNITS/MODE key again and the WCI icon will disappear. AUTO POWER OFF: After approx. 20 mins, if meter keys are not touched, the meter automatically shuts down to preserve battery life. EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 for authorization. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. 2. 3. Specifications 2. Display Measurements Dual LCD with multifunction indicators Knots, km/h, MPH, ft/min, m/sec, Beaufort force, windchill, and temperature (C/F) Wind-speed Moving 2 second average with 2 second gust detect Sensor Sapphire bearing, non-corrosive vane for air velocity and precision thermistor for temperature Average Mode Choice of 5, 10, or 13 second average readings Max Display Push button highest reading recall Data hold Freeze most recent display Sample time 1 reading per second Water-resistant To 3’ (1 meter) Min/Max wind-speed 1.1 to 62.5 MPH Operating temperature 5 to 122oF (-15 to 50oC) Operating humidity < 80% RH Power supply Lithium battery type CR-2032 or equivalent Battery life 400 hours approx. Weight 3 oz. ( 95 g ) Dimensions Instrument: 5.25 x 2.75 x 0.75” (133 x 70 x 19mm) Vane: 1” ( 24mm ) diameter 2.2 Electrical Specifications Measurement MPH (Miles per hour) km/hr (kilometers per hour) Knots (nautical miles per hour) m/sec (meters per second) ft/min (feet per minute) Beaufort force Temperature Range 1.1 to 62.5 MPH 1.8 to 100.6 km/h 1.0 to 54.3 knots 0.50 to 28.00 m/s 100 to 5500 ft/min 1 to 17 BF 0 to 122oF -18 to 50oC Resolution 0.2 MPH 0.7 km/h 0.3 knots 0.01 m/s 20ft/min 1 BF 0.1oF 0.1oC Accuracy ± (3%rdg +0.4MPH) ± (3%rdg +1.4km/h) ± (3%rdg +0.6knots) ± (3%rdg +0.2m/s) ± (3%rdg +40ft/min) ±1 ±1.8oF ±1oC 4. Calibration / Repair Services Extech offers complete repair and calibration services for all of the products we sell. For periodic calibration, NIST certification or repair of any Extech product, call customer service for details on services available. Extech recommends that calibration be performed on an annual basis to insure calibration integrity. 5. 6. CFM Measurements Measure the area of the duct using the diagrams below for rectangular and circular ducts (If the duct measurements are made in inches, divide the inches by 144 to get the area in square feet). Plug the area value (in square feet) in the cubic equations below. Note that the air velocity must be plugged into the cubic equations also. 7. 8. Warranty CFM (ft /min) = Air Velocity (ft/min) x Area (ft ) CMM (m /min) = Air Velocity (m/sec) x Area (m ) x 60 3 2 3 2 Copyright © 2008 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form. V4.0 1/08