1 Never take measurements on a circuit in which the electrical potential exceeds 690V.(When the measured voltage exceeds 690V, all the voltage LED displays will light up)
2 Do not attempt to take measurements in the presence of flammable gasses, as the use of the.
3 Never attempt to use the instrument if the surface of your hands are wet. (Do not use in rain.)
4 Keep your hands and fingers behind the barriers during measurements.
5 Never unlock and open the battery case during measurements.
6 Verify proper operation on a known source before taking action as a result of the indication.
7 Never attempt to make any measurement in any abnormal conditions, such as a broken case.or exposed metal parts are present on the instrument or test probes.
8 Do not make any modification to the instrument.
9 Take extreme caution when live circuit LED flashes or lights up.
10 Correct indication of LEDs is only guaranteed within a temperature range of -10℃ up to 55℃(<85%RH).instrument may cause sparking, which could lead to an explosion.