What should be paid attention to when using a digital multimeter
The multimeter is not intended for use in potentially explosive environments. The multimeter should only be operated by personnel who can recognize the exposure hazard and take appropriate safety measures. The maximum voltage allowed by the standard between the voltage input or all inputs to ground is equal to 1000v for class II / 600v for class III, respectively. According to the DIN EN 61010-031 standard, when performing measurements in an environment that complies with measurement category III, a safety helmet may only be fitted on the test probe of the measurement cable. When making measurements involving exposure hazards, work alone should be avoided. Make sure there is a second person present. Be prepared for unexpected voltages that occur in the device under test, (defective device). For example, capacitors can be dangerously charged. Make sure that the measurement cable is intact. No damage to insulation, no interruption of cables or plugs, etc. Measurements are not possible in circuits with corona discharge (high voltage)! Special care is required when making measurements in high frequency circuits where dangerous pulsating voltages may be present. Measurements in wet ambient conditions are not allowed. Do not overload the measuring range beyond its permissible capacity! The input of the current range is fused. Please use original fuses! When using the power supply, the battery is automatically powered off, and the rechargeable battery can only be charged externally. The device cannot be operated with the fuse or battery compartment cover removed.
