PROFESSIONAL MEASURING AND TEST INSTRUMENTS
PROFESSIONAL MEASURING AND TEST INSTRUMENTS
PROFESSIONAL MEASURING AND TEST INSTRUMENTS
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GENERAL INFORMATION | SAFETY INFORMATION<br />
In today's environment measuring and test instruments are essential tools for building, repairing and servicing electrical<br />
devices and systems.<br />
The primary objective of modern test instruments is to help the user to perform safety checks, troubleshooting and functional<br />
tests quickly, safely and reliably.<br />
Internationally valid safety standards for the safety of electrical measuring and control equipment are drawn up and ratified<br />
by the IEC (International Electrotechnical Commission). They guarantee that tests are carried out according to the<br />
same criteria and guidelines all over the world.<br />
Measuring and test instruments are tested as follows:<br />
CAT II 600V | 4,000V peak impulse test voltage 12 Ohm source<br />
CAT II 1000V | 6000V peak impulse test voltage 12 Ohm source<br />
CAT III 600V | 6,000V peak impulse test voltage 2 Ohm source<br />
CAT III 1000V | 8000 V peak impulse test voltage 2 Ohm source<br />
CAT IV 600V | 8,000V peak impulse test voltage 2 Ohm source<br />
CAT IV 1000V | 12000V peak impulse test voltage 2 Ohm source<br />
Measuring instruments are classed according to 4 different categories that indicate for which range they are approved.<br />
CAT I | Electrical circuits that are not connected directly to the mains<br />
- Battery-operated electrical devices<br />
- Fused electrical circuits in electronics devices<br />
CAT II | Electrical circuits with no direct electrical connection to the mains<br />
- Socket outlets and long branch lines<br />
- All socket outlets that are more than 10 m removed from CAT III<br />
- All socket outlets that are more than 20 m removed from CAT IV<br />
CAT III | In building installations, for example, distribution boards, cabling, socket outlets<br />
- Supply cables and short supply leads<br />
- Distributor boards<br />
- Socket outlets for large loads with short power supply leads<br />
- Lighting systems in large buildings<br />
- Supplies<br />
- Busbars<br />
CAT IV | At the source of the low current low-voltage installation, for example electricity meters, main terminal, primary<br />
surge protection devices<br />
- In the open and supply cable routing<br />
- Supply cables from connection point to the building<br />
- Connection between the measuring instrument and the connection point<br />
- Overhead lines to individual buildings<br />
- Underground cables to water pumps<br />
Manufacturers are able to provide documentary evidence that their products comply with IEC/EN 61010-1 by having the<br />
product tested for compliance by an independent, recognised certifying body. Following successful compliance testing the<br />
manufacturer is entitled to affix the corresponding GS symbol to his product.<br />
As a safety conscious and responsible manufacturer all Testboy GmbH products are certified by TÜV - Süd GmbH (TÜV =<br />
Technical Inspectorate in Germany).<br />
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