Structure: The instrument consists of a light probe and main body. The two parts are connected with a cord. There are four keys on the front panel of the main body. Their functions are: "ON/OFF": Press this key to turn on/off the instrument "D-H": Press this key to switch between the data sampling state and data retention state "P-H": Press this key to switch between the data sampling state and maximum data retention state Operation: To operate, first press "ON/OFF" to turn it on. The instrument enters the measuring mode. Aim the light probe at the screen being measured to conduct measurement. If it goes beyond the measuring range, a symbol "OL" will be displayed. You can press "RANG" to increase the measuring range. If the signal is too low, it will display "0." You can press "RANG" to decrease the measuring range. If you want to retain the data, please press "D-H." After you have completed a reading, press this key once again. It will return to measuring mode. After "P-H" is pressed, the reading will change only when the current measured value is higher than the measured value in the previous sampling and only the maximum value measured is displayed. Maintenance: For long term storage, the instrument should be stored in a dry place (relative humidity <80%) with optimum temperature (100C-300C); lAvoid damage caused by contamination and violent vibration (or collision); lWhen "LOW" appears during use, the battery is basically used up and should be replaced; The recalibration cycle stipulated in national regulations is one year. Please calibrate it on schedule. Battery may cannot be sent for transportation limits. Note:We are not responsible for any custom duty, import tax, other customs charges or delays caused by the custom
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