Attention

◇ Light Receiver:

 * When the meter is not in use, please always  keep the
    cover of the light receiver in its place  to avoid the
    damage from wearing out.

 * Do not touch the Light Sensor (white part) with the
    bare hands.

 * To clean the Light Sensor only with the dry flannel
    fabric or the equivalent material. Any kind of detergent
    that may hurt the Light Sensor is absolutely forbidden.

◇ Low battery condition:

 * When the battery voltage is under proper operation
     requirement, thesymbol will show on the LCD
     and the battery need to be replaced with a new one
     for an accurate data measurement.

◇ Overload Condition:

 * When"OL" shows on the LCD, it means overload
    and the user should select a prper measuring range
    for testing.

 * This meter is not suitable for measuring the light
    (such as sunshine) when "OL" shows on the LCD
    under the maximun range 20000 Lux (YJ2A50) &
    200000 Lux (YJ2A51) is selected.

 * Please avoid to use the meter for measurement in
    the environment of high temp. or moisture.