User`s Manual - Test Equipment Depot
Contents
1. 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Meter Description Vane impeller 1 Impeller set screw on rear of meter 2 Relative Humidity sensor 3 Temperature sensor 4 F LCD display EXTECH 45158 KNT ON OFF HOLD key og UNITS MODE key Battery compartment on rear Tripod mounting hole O ON OOF O N gt 0 Lanyard neckstrap INSTRUMENTS Mini Thermo Anemometer 10 Operation Turning the meter ON and OFF e Press the ON OFF HOLD button to turn the meter ON e Press and hold the ON OFF HOLD buttons for approx 3 seconds to turn it OFF e The meter s Auto Power OFF feature turns the meter OFF after 10 minutes of inactivity Change the lower display parameter e With the meter ON press and hold down the ON OFF HOLD button e While continuing to hold the ON OFF HOLD button press the UNITS MODE button repeatedly to step through Temperature F C Humidity RH Dew Point TD amp Temperature with wind chill factor WCI Note that the center display is Air Velocity Change the Air Velocity unit of measure e Turn the meter OFF Press and hold down both buttons until the display turns on and begins blinking then release both buttons e Press the UNITS MODE button repeatedly to step through the units see specs for list e After 5 seconds the meter switches back to normal operation mode automatically Select temperature units C or F e Turn the meter OFF f2. be plugged into the cubic equations also For circular ducts measure For rectangular the radius r square the ducts multiply the Height radius and multiply the radius by 7 3 14 A mr or A 3 14xrxr Height x Width Width Cubic Equations CFM ft min Air Velocity ft min x Area ft CMM m min Air Velocity m sec x Area m x 60 Maintenance Battery Replacement The 45158 has a low battery indicator battery symbol Important Turn the meter off before opening the battery compartment Using a coin turn the battery compartment cover CLOCKWISE to remove it Once opened observe the position of the battery placing the new one in the same position Secure the battery compartment cover and dispose of the lithium battery in accordance with local state or national disposal codes Impeller Replacement Remove the set screw next to the impeller assembly on the rear of the meter Twist the impeller assembly counter clockwise to the OPEN position and remove it Install impeller by inserting amp twisting the new impeller assembly clockwise Tighten the set screw Unit of Measure Conversion Tables Units Conversion Table pms fimin Knots kmh 0 01138 Aknot 0 5144 10127 1 1859 Meter Sec 0 0 2 0 3 1 5 1 6 3 3 3 4 5 4 5 5 7 9 8 0 10 7 10 8 13 8 13 9 17 1 17 2 20 7 20 8 24 4 24 5 28 4 103 117 TNE 56 63 28 5 32 6 12 to 17 above 117 above 72 above 63 above 32 6 Test
3. Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com
4. User s Manual EXTECH INSTRUMENTS Model 45158 Mini Hygro Thermo Anemometer Introduction Congratulations on your purchase of Extech s Model 45158 Anemometer The dual display indicates Air Velocity and Humidity Dew Point Ambient Temperature or Temperature with wind chill factor With careful use this meter will provide years of reliable service Specifications Range Specifications Test Equipment 99 Washington Street Depot Melrose MA 02176 Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 517 8431 EXTECH Mini 1 Thermo Anemometer 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 Relative Humidity Dew Point General Specifications Display Sensors Average Mode Max and Data Hold Displays Sample time Water resistant Operating conditions Power supply Dimensions Weight 00 500Rnin omin EG 40 Ri Domar osme pare ster eT aie at Osho pare Eere thermistor for temperature measurements 1 reading per second for air velocity and temperature 1 reading per 15 seconds for humidity with 2 second updates To 3 1m 5 to 122 F 15 to 50 C lt 80 RH Lithium battery CR 2032 or equivalent 400 hour battery life Instrument 5 25 x 2 75 x 0 75 133 x 70 x 19mm Vane 1 24mm diameter 3 oz 95 g Test Equipment Depot 800 517 8431
5. irst Press and hold down both buttons until the display turns on and begins blinking then release the buttons e Press both buttons momentarily to change temperature units e After 5 seconds the meter switches back to normal operation mode automatically Taking Measurements Position the meter so that the airflow enters the meter vane from the rear of the meter opposite side of front panel logo A tripod mount is located on the bottom of the meter Max Hold e Max Hold represents the highest measurement taken since the meter was turned on e Press the UNITS MODE button to display the Max reading MAX icon appears e Press the UNITS MODE button repeatedly to step through to the normal operating mode Average mode e 5or 10 reading averages can be displayed in the Average Mode e Press UNITS MODE 3 times for 5 reading averaging or 4 times for 10 readings e To exit this mode press the UNITS MODE button until the icons on the left disappear Data Hold e Data Hold freezes the most recent displayed reading e Press and hold the ON OFF HOLD button to activate Data Hold e As long as the ON OFF HOLD button is held the reading will remain on the LCD 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
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