Multifunction testers are designed to make electrical installation testing safer and more efficient, performing all electrical testing procedures required by UK BS7671 wiring regulations, without the need to constantly switch the testing device being used.
Multifunction testers are also commonly divided up into two categories - downloadable, and non-downloadable. Downloadable multifunction testers are designed with internal memory, allowing users to store test data, communicate this data to PC and interact with it further using software packages. Non-downloadable MFTs are generally cheaper in price as they include no internal memory structure, and are designed for simple testing with users jotting down results gained.
The most common testing procedures that multifunction testers carry out include:
- Insulation resistance tests
- Earth continuity tests
- Automatic RCDs tests
- Measure loop impedance and line impedance
- PSCC (prospective short circuit current) tests to determine required circuit breakers and fuses
- Socket polarity tests
- Wiring polarity checks
- Phase sequence/ rotation checks
Internet Electrical offer the latest ranges of multifunction testers from Megger, Kewtech, Fluke and Dilog.