Safety

The instrument and modules designed for use with the instrument have been designed in accordance with the IEC 61010 safety standard, and their safety has been verified by means of testing prior to shipment. However, failure to follow the information in this manual could render safety-related functionality provided by the instrument ineffective.

Please review the safety information below before using the instrument.

DANGER
Read this manual carefully and ensure you understand its contents before using the instrument. Improper use of the instrument could result in serious bodily injury or damage to the instrument.

DANGER

Read this manual carefully and ensure you understand its contents before using the instrument.

Improper use of the instrument could result in serious bodily injury or damage to the instrument.

WARNING
If using an electrical measuring instrument for the first time, seek instruction from an individual with electrical measurement experience first. Failure to do so may lead to electric shock, overheating, fire, arcing due to a short-circuit, or other hazards.

WARNING

If using an electrical measuring instrument for the first time, seek instruction from an individual with electrical measurement experience first.

Failure to do so may lead to electric shock, overheating, fire, arcing due to a short-circuit, or other hazards.

Measurement categories

IEC 61010 defines measurement categories to facilitate safe use of measuring instruments. Test and measurement circuits designed to be connected to a main power supply circuit are classified into three categories depending on the type of main power supply circuit.

DANGER
Do not use an instrument to measure a main power supply circuit whose category exceeds the instrument’s rated measurement category. Do not use an instrument that does not have a rated measurement category to measure a main power supply circuit. Doing so may result in serious bodily injury or damage to the instrument or other equipment.

DANGER

Do not use an instrument to measure a main power supply circuit whose category exceeds the instrument’s rated measurement category.

Do not use an instrument that does not have a rated measurement category to measure a main power supply circuit.

Doing so may result in serious bodily injury or damage to the instrument or other equipment.

CAT II

Applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage mains installation.

Examples: Measurements on household appliances, portable tools, and similar equipment, and on the consumer side only of socket-outlets in the fixed installation.

CAT III

Applicable to test and measuring circuits connected to the distribution part of the building’s low-voltage mains installation.

Examples: Measurements on distribution boards (including secondary meters), photovoltaic panels, circuit breakers, wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use and some other equipment such as stationary motors with permanent connection to the fixed installation.

CAT IV

Applicable to test and measuring circuits connected at the source of the building’s low-voltage mains installation.

Examples: Measurements on devices installed before the main fuse or circuit breaker in the building installation.