User Manual CFM100 Thermo-Anemometer Introduction Congratulations on your purchase of the Triplett CFM100 ThermoAnemometer. The CFM/CMM Thermo Anemometer instrument measures Air Velocity, Air Flow (volume) and Temperature. The large, easy-to-read backlit LCD includes primary and secondary displays plus numerous status indicators.
Safety Do not operate the meter in environments where the following are present: explosive gases (or materials), combustible gases (or materials), steam, or dust. Please replace the battery immediately when the low battery symbol appears on the LCD. Do not touch the meter’s circuit board for any reason; static electricity or contamination could damage the sensitive components. This instrument was designed for pollution degree 2. Operation Altitude: Up to 2000m (7000’). Description 1.
Display Overview VEL: indicates that meter is in air velocity mode FLOW: indicates that meter is in air flow mode MAX (bottom of LCD): Max Hold for the Air Velocity and Air Flow function HOLD (bottom of LCD): Data Hold for the Air Velocity and Air Flow function o CFM/CMM: airflow units of measure AREA(ft2, m2): units for area dimensions m/s, ft/min, km/h, MPH, knots: air velocity units of measure X10, X100: multipliers for air flow readings AVG: air averaging mode
Operation Connecting the Vane 1. The vane plug is inserted in the meter’s sensor jack at the top of the 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 in place. Do not apply undue force or try to twist the plug side-toside. 3. If the vane is not connected to the meter or if the sensor is defective, the LCD display will indicate OL in place of a Temperature reading.
Air Flow Measurements (CMM / CFM) 1. Turn on the meter using the ON/OFF button Side view of 2. Press the UNITS button to select the desired air flow units: CMM (cubic meters per minute) or CFM (cubic Vane feet per minute). NOTE: At power up the meter will Arro display the last unit of measure previously entered. w 3. To begin entering the area in m2 or ft2, press and hold the AREA button until it beeps twice. The airflo leftmost digit of the bottom display will begin to flash. w 4.
Data Hold (Air Velocity/Air Flow) 1. While taking measurements, press the HOLD button to freeze the air velocity/air flow reading. 2. The HOLD indicator will appear in the bottom of the LCD display. 3. Press HOLD again to return to normal operation. MAX/MIN/AVG Record (Air Velocity/Air Flow) This allows the user to record and view the highest (MAX), lowest (MIN) and average (AVG) readings. 1. Press the button MAX/MIN button.
4. Note that AUTO POWER OFF is re-enabled each time the meter is turned on. 5. Also note that AUTO POWER OFF is disabled in CFM/CMM or Average mode. Battery Replacement When appears on the LCD, the 3*1.5V AA battery must be replaced. 1. Disconnect the sensor. 2. Remove the meter’s rubber protective jacket 3. Use a Phillips screwdriver to open the rear battery compartment 4. Replace the 3*1.5V AA battery 5.
Specifications Air Velocity Range Resolution Accuracy m/s (meters per sec) 0.40 - 30.00 m/s 0.01 m/s ± (3% + 0.20 m/s) km/h (kilometers/hour) 1.4 - 108.0 km/h 0.1 km/h ± (3% + 0.8 km/hr) ft/min (feet per minute) 80 – 5900 ft/min 1 ft/min ± (3% + 40 ft/m) mph (miles per hour) 0.9 – 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) Range Resolution Area CMM (cubic meters/min) 0-999900 m3/min 0.001 to 100 0 .000 to 999.
General Specifications Circuit Display Sampling rate Sensors Automatic Power off Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Battery Battery life Battery Current Custom LSI microprocessor circuit Dual function 4-digit LCD 1 reading per second approx.
Useful Equations and Conversions Area equation for rectangular or square ducts Height (H) Width (W) Area (A) = Width (W) x Height (H) Area equation for circular ducts Radius Area (A) = x r2 Where = 3.14 and r2 = radius x radius Cubic equations CFM (ft3/min) = Air Velocity (ft/min) x Area (ft2) CMM (m3/min) = Air Velocity (m/sec) x Area (m2) x 60 NOTE: Measurements made in inches must be converted to feet or meters before using the above formulae.
Unit of Measure Conversion Table m/s ft/min knots km/h MPH 1 196.87 1.944 3.6 2.24 1 ft/min 0.00508 1 0.00987 0.01829 0.01138 1 knot 0.5144 101.27 1 1.8519 1.1523 1 km/h 0.2778 54.69 0.54 1 0.6222 1 MPH 0.4464 87.89 0.8679 1.6071 1 1 m/s Warranty Information Triplett / Jewell Instruments extends the following warranty to the original purchaser of these goods for use.
