Safety requirement CN ⚫ Class I refers to measurements taken on a circuit not directly connected to the main power supply. For example, measurements made on circuits that are not exported from a main power supply, especially from a protected (internal) main power supply. In the latter case, the instantaneous stress will change. Therefore, the user should understand the instantaneous capacity of the instrument. ⚫ Class II refers to measurements taken on a circuit directly connected to low- voltage instruments. For example, measurements made on household appliances, portable tools, and similar equipment. ⚫ Class III refers to measurements taken on construction equipment.
For example, measurements made on switchboards, circuit breakers, circuits (including cables, busbars, junction boxes, switches, sockets) in fixed equipment, as well as equipment for industrial use and certain other equipment (for example, fixed motors permanently connected to fixed instruments). ⚫ Class IV refers to measurements taken at the source of low-voltage equipment. For example, measurements made on electricity meters, primary overcurrent protection equipment, and pulse control units.
1.4 Ventilation Requirement To ensure sufficient ventilation, when using the instrument in a workbench or rack, please ensure that there is a gap of at least 10 centimeters on both sides, above, and behind it. Note: Poor ventilation can cause an increase in instrument temperature, leading to instrument damage. Good ventilation should be maintained during use, and ventilation openings should be regularly checked.
1.5 Work Environment Operating temperature and humidity range 0 ℃ -40 ℃, below 80% RH (without condensation) Storage temperature and humidity range -10 ℃ -50 ℃, below 80% RH (without condensation) Accuracy assurance temperature and humidity range 23 ° C ± 5 ° C, below 80% RH (without condensation) Warning: