Di-Log multifunction testers are versatile instruments designed to perform a comprehensive range of electrical tests, ensuring compliance with the 18th Edition wiring regulations (BS 7671) in the UK. These devices are essential for electricians and engineers involved in the installation, testing, and maintenance of electrical systems.

Operation

Di-Log multifunction testers are user-friendly, featuring large colour LCD displays that provide clear visual indications of test results. Some models include colour-changing RGB screens to indicate pass/fail conditions, enhancing user interpretation. Auto-start functions for loop and continuity tests, along with intelligent detection systems, simplify the testing process.

Functions and Measurements

The Di-Log multifunction tester range features the following (model dependent):

Continuity Testing: Assesses the integrity of electrical connections by measuring the resistance in conductors, ensuring they are properly connected. Features like auto-start and lead resistance nulling enhance efficiency.
Insulation Resistance Testing: Evaluates the quality of insulation between conductors by applying a test voltage (250V, 500V, or 1000V) and measuring resistance, identifying potential leakage paths.
Loop Impedance Testing: Measures the total impedance of a live circuit to ensure fault currents will trigger protective devices appropriately. Di-Log's RCD-LOC XLT technology allows for non-trip loop testing, preventing unintended RCD or RCBO activation.
Prospective Short Circuit Current (PSCC) Measurement: Determines the potential fault current at a given point in the system, aiding in selecting appropriate protective devices.
Residual Current Device (RCD) Testing: Assesses the functionality of RCDs by measuring trip times and currents, including tests for various RCD types (AC, A, B, and Selective). Auto RCD testing sequences streamline this process.
Phase Rotation Testing: Identifies the correct sequence of phases in three-phase systems, crucial for the proper operation of three-phase equipment.

Applications

These testers are widely used in:

Domestic Installations: Ensuring household electrical systems are safe and compliant with regulations.
Commercial and Industrial Settings: Testing and maintaining complex electrical installations to guarantee operational safety and efficiency.
Electric Vehicle (EV) and Photovoltaic (PV) Systems: Certain models, like the DL9130EV, are tailored for testing EV charging stations and solar panel installations, including the ability to conduct Type B (Pure DC) RCD tests.

Each DiLog multifunction tester includes practical features like a toolbox-style carry case, remote test probes, and compliance with national loop impedance standards. With calibration certificates available, these testers guarantee precision, reliability, and adherence to UK regulations.