User's Guide EasyView Digital Light Meter Model EA31
Introduction Congratulations on your purchase of the Extech EasyView Digital Light Meter which measures the amount of light falling on a surface (illuminance) in Footcandles or Lux. This device measures up to 20,000 Fc and 20,000 Lux. Careful use of this meter will provide years of reliable service. Specifications Units Ranges and Resolution Lux 20.00, 200.0, 2000, 20.00kLux Foot-candles 20.00, 200.0, 2000, 20.00kfc Accuracy ± (3% rdg + 0.5% FS) ±( 4% rdg + 0.
Meter Description 1. 2. 3. 4. 5. 6. 7. LCD display Range button Power ON/OFF button lux / fc selection button Data HOLD button MAX/MIN button Photo sensor (lens cover not shown) (Tripod mount on rear of sensor) Note: Battery compartment is located on the rear of the instrument Spectral Sensitivity 3 EA31 V2.
Operation Power ON or OFF Press the button to turn power on or off. Units of measure Press the lux / fc button to select the unit of measure. “fc” or “lux” will appear in the display. Light sensor 1. The light sensor is attached to the meter with a coiled cable which allows placement of the sensor up to approximately 3 feet from the meter. 2. The light sensor is a silicon photo diode and resides under the white domed lens. 3.
Reference Foot candles Lux Typical Light Levels >10000 >107600 1000 to 10000 10760 to 107600 Sunlight Operating Table Assembly (fine) 100 to 1000 1076 to 10760 Football stadium Emergency room Drafting table Overcast day Assembly (general) Classroom 10 to 100 107 to 1076 Casual reading Shipping area Stairwell Auditorium ATM machine 1 to 10 10.7 to 107 Storage room Building entrance Parking lot Highway 0 to 1 0 to 10.7 f Full moon Foot-candle / Lux conversion 1 lux = .
Maintenance Cleaning and storage 1. The white plastic sensor dome should be cleaned with a damp cloth when necessary. 2. Store the meter in an area with moderate temperature and humidity (refer to the operating and storage range in the specifications chart earlier in this manual). Battery Replacement When the battery voltage is low the ‘BT’ symbol will appear on the display. Replace the six (6) 1.5 ‘AAA’ batteries by removing the rear (center) battery compartment screw and accessing the battery compartment.
Warranty EXTECH INSTRUMENTS CORPORATION warrants the basic 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 EXTENSION 210 for authorization or visit www.extech.com for more information.
