Item Type: Illuminance Meter_x000D_ Material: Plastic_x000D_ _x000D_ Weight: Approx. 143g / 5oz_x000D_ _x000D_ Display: 3 1/2 digit liquid LCD screen display, measuring range from 1 LX to 200,000 LX_x000D_ Sampling Rate: 2.0 times/sec_x000D_ Repeat Test: 2%_x000D_ Temperature Characteristics: 0.1%C_x000D_ Power Supply: 2 x AAA Batteries (Not included in the factory, need to be equipped by the user)_x000D_ _x000D_ How to Use:_x000D_ 1. Power Switch Button: Press the button to switch the power ON/OFF._x000D_ 2. Maximum/Minimum Measurement Selection Button: Press the Maximum button once, the LCD screen displays the Maximum sign, enter the maximum measurement function, only the maximum value during the measurement process is displayed,press again, the LCD screen displays the MIN sign , enter the minimum value measurement function, only the minimum value in the measurement process is displayed, press the MIN key again, the MIN sign disappears, and the real-time measurement data is displayed._x000D_ 3. Measurement Data Hold Function Key: Press the hold key once, the LCD screen displays the 8 sign, the measurement data is locked, and the illuminance measurement cannot be performed,press the 8 key again to cancel the lock, the sign disappears, and the illuminance is measured again._x000D_ 4. Measurement Gear Conversion Function Button: Press the RANGE button repeatedly to realize the conversion measurement of different gears._x000D_ When the AUTO sign is displayed, it means that it is in the automatic range conversion function, and the corresponding gear can be automatically selected according to the measured light strength. When the AUTO sign is not displayed, it means manual range conversion. When the measured light strength exceeds the currently displayed range is displayed, the sign 8 will be displayed. You need to manually press the RANGE key to enter the following larger range for measurement._x000D_ 5. Instrument Function Setting Key: Long press the MODE key for more than 5 seconds to enter the LX/FC measurement unit selection function, the LCD screen LX sign flashes, if you need to convert to FC measurement unit, press the HOLD key FC flashing, the meter will display the measurement data in FC, on the contrary, if the LCD screen FC flashes, if you need to switch to the LX measurement unit, press the Maximum button, if the measurement unit has been selected, press the MODE button once , enter the data automatic recording parameter setting function. 1The photometer has the function of holding the maximum and minimum readings, which is convenient for people to check. 2The maximum and minimum measurement selection buttons are easy to use. It can switch at random. There is an option to switch LX/FC units. 3Automatic measurement level selection, the measurement range is from 1 LX to 200,000 LX. 4Measurement gear conversion function button: Press the RANGE button cyclically to realize the conversion measurement of different gears. 5Instrument function setting key, long press the MODE key for more than 5 seconds to enter the LX/FC.1 x Photometer (Battery Not Included) 1 x Manual