User Manual AM320 CFM/CMM Thermo- Anemometer + InfraRed Thermometer
Introduction Congratulations on your purchase of the Triplett AM320 CFM/CMM Thermo Anemometer with InfraRed Thermometer. This instrument measures Air Velocity, Air Flow (volume), Air Temperature (with probe) and Surface Temperature (with the InfraRed function). The large, easyto-read backlit LCD includes primary and secondary displays plus numerous status indicators. The InfraRed feature includes a laser pointer for convenient targeting.
Do not leave batteries and packing material lying around unattended; they can be dangerous for children if they use them as toys In case the device is going to be unused for an extended period of time, remove the batteries to prevent them from draining Expired or damaged batteries can cause cauterization on contact with the skin. Always, therefore, use suitable hand gloves in such cases See that the batteries are not short-circuited. Do not throw batteries into the fire.
Meter Description 1. Power ON/OFF button 2. 3. Probe input jack Laser pointer 4. IR Sensor 5. Rubber holster 6. LCD Display 7. IR thermometer measurement button 8. Airflow buttons (4) 9. Air Temperature function buttons (2) 10. Vane 11. Airflow Average button 12. Backlight button 13. MAX‐MIN button for TEMPERATURE mode 14. HOLD for TEMPERTAURE functions 15. MAX‐MIN button for AIR VELOCITY/AIR FLOW (also used as left arrow button) 16.
Keypad Press to turn the meter ON or OFF IR + Laser Pointer Press and hold to measure. MAX/MIN (Airflow) Record and store the highest and lowest airflow or velocity readings. ◄ (LEFT) also serves as change decimal point button in AREA mode UNITS Press to select the mode of operation. In FLOW mode, the meter displays air volume. In VELOCITY mode, the meter displays air speed. ▲ (UP) also serves as increase number button in AREA mode. HOLD Press to freeze the displayed reading.
Display Layout MAX (top of LCD): Max Hold function engaged for the Air Temperature function HOLD (top of LCD): Data Hold function engaged for the Air Temperature function PROBE TEMP: Reminder that the top LCD digits represent Air (Vane) Temperature : Indicates that the laser pointer is on.
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-to-side. 3. If the vane is not connected to the meter or if the sensor is defective, the LCD display will indicate dashed lines in place of an air velocity reading.
Air Velocity Measurements (Up to 20 Point averaging) 1. To enter 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 in the display. 3. The average reading will be displayed and number of readings measured will appear in the upper right hand corner of the display. After 5 seconds, the display will return to the current reading. 4.
5. Place the sensor in the air stream. Ensure that the air enters the vane as indicated by the arrow sticker placed inside the vane. Refer to the diagram. The large main LCD display shows the Air Velocity reading. The upper right LCD sub-display shows the temperature reading. The meter has 16 memory locations (8 for CFM and 8 for CMM) that can be used to store commonly used area sizes that you can recall at anytime. 1. Press the AREA button until meter beeps twice.
After 5 seconds, the display will return to the current reading. (IMPORTANT: Please note that the average readings are only held for 5 seconds and cannot be recalled.) 4. Repeat steps 2 - 3 until all desired points have been measured. 5. Press the AREA button to clear the multipoint averaging memory. 6. To return to standard airflow measuring mode press and hold AVG button until meter beeps twice. Data Hold (Air Velocity/Air Flow) 1.
2. Replace the protective jacket and connect the sensor to the sensor input jack on top of the meter. Data Hold (Air Temperature) 1. While taking measurements, press the PROBE TEMPERATURE HOLD button to freeze the air temperature reading. 2. The HOLD indicator will appear in the bottom of the LCD display. 3. Press PROBE TEMPERATURE HOLD again to return to normal operation. Max/Min Record (Air Temperature) This allows the user to record and view the highest (MAX), lowest (MIN) air temperature readings. 1.
InfraRed (Non-Contact) Temperature Measurements 1. The IR sensor is located at the top of the meter. 2. Point the sensor toward the surface to be measured. 3. Press and hold the red IR button to begin measuring the surface temperature of a desired target. IR TEMP and will appear on the display. The laser pointer will switch on to help aim the meter. 4. The measured IR surface temperature will appear at the center of the LCD (larger digits).
Battery Replacement When appears on the LCD, the 9V battery must be replaced. 1. Disconnect the vane. 2. Remove the meter’s rubber protective jacket 3. Use a Phillips screwdriver to open the rear battery compartment 4. Replace the 9V battery 5. Close the battery compartment and replace the meter’s protective jacket Never dispose of used batteries or rechargeable batteries in household waste.
Air Flow CMM (cubic meters/min) CFM (cubic ft/min) Air Temperature InfraRed Temperature Circuit Display Sampling rate Sensors IR Spectral response IR Emissivity IR distance ratio IR sampling rate Automatic Power off Operating Temperature Range Resolution Area 0-999999 m3/min 0.1 0 to 999.9m2 0-999999 ft3/min 0.1 0 to 999.9ft 2 Range Resolution Accuracy 14 - 140oF (-10 60oC) 0.1oF/C 4.0oF (2.0oC) Range Resolution Accuracy -58 to -4oF (-50 to 20oC) ±9.0oF (5.
o -10 to 60 C (14 to Storage Temperature 140oF) Operating Humidity <80% RH Storage Humidity <80% RH Operating Altitude 2000 meters (7000ft) maximum Battery One 9 volt (NEDA 1604) battery 80 hours approx. (if Backlight and Laser are used Battery life continuously the battery life is reduced to 2 to 3 hours approx.) Battery current 8.3 mA DC approx. 725g (1.6 lbs) including battery Weight & probe Dimensions Main instrument: 178 x 74 x 33mm (7.0 x 2.9 x1.2") Sensor Head: 70mm (2.
IR Theory IR thermometers measure the surface temperature of an object. The meter’s optics sense emitted, reflected, & transmitted energy that is collected and focused onto the meter’s detector. The meter’s circuitry translates this information into an LCD reading. IR Field of View Ensure that the desired target is larger than the spot size as shown in the diagram below. As the distance from an object increases, the spot size of the area measured by the meter becomes larger.
Thermal Emissivity Table for Common Materials Material Emissivity Material Emissivity Asphalt 0.90 to 0.98 Cloth (black) 0.98 Concrete 0.94 Human skin 0.98 Cement 0.96 0.75 to 0.80 Sand 0.90 Leather Charcoal (powder) Earth 0.92 to 0.96 Lacquer 0.80 to 0.95 Water 0.67 Lacquer (matt) 0.97 Ice 0.96 to 0.98 Rubber (black) 0.94 Snow 0.83 Plastic 0.85 to 0.95 Glass 0.85 to 1.00 Timber 0.90 Ceramic 0.90 to 0.94 Paper 0.70 to 0.94 Marble 0.94 Chromium oxides 0.
Area equation for circular ducts Area (A) = x r2 Radius 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 1 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.
Warranty Triplett / Jewell Instruments extends the following warranty to the original purchaser of these goods for use. Triplett warrants to the original purchaser for use that the products sold by it will be free from defects in workmanship and material for a period of (1) one year from the date of purchase.
