Safety requirements EN 1.3 Measurement category Measurement category This instrument can be used for measurement under class I. Warning: This instrument is only allowed to be used in the specified measurement class. Measurement class definition ⚫ 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 Working conditions Temperature Operating temperature: 0 ℃ - 45 ℃ Storage temperature: 20 ℃ - 60 ℃ Humidity ≤ +104 ℉ (≤+40°C): relative humidity≤90% 106 ℉ ~122 ℉ (+41°C ~50°C): relative humidity≤60% Warning: To avoid the danger of short circuit or electric shock, do not operate the instrument in a humid environment. Altitude Copyright © Qingdao Hantek Electronics Co., LTD HDG3000B User manual 3