Checks Insulation Testers:
• 3 Insulation resister values.
• LED indication of test values.
• 3 continuity resistor values.
• AC line voltage output for testing Voltage measurements.

Checks RCD Testers:
• Functional check of RCD testers via a dedicated 13A socket.
• 3 Selectable ranges.
• Indicators for Ready, Tripped, Overcurrent.

Checks Loop Testers:
• Functional check of loop tester via a dedicated 13A socket.
• Supplied lopp impedance.

Wiring check:
• Voltage indications between the following wires: (phase to earth) (phase to neutral) (incorrect wiring).