1672/1673 FC/1674 FC
Users Manual
8
Safety Features
Safety and performance are requirements for any electrical system. Good quality insulation, a
properly working grounding system, and active protection ensure the safety of people,
electrical systems, and buildings. These factors protect them against electrocution, fire, and
other equipment damage.
Live Circuit Detection
For continuity and insulation resistance measurements, the Product inhibits the test if the
terminal voltage detected is >30 V ac/dc before the test starts. The beeper sounds
continuously if this voltage is present.
Earth Resistance Measurement
The Product inhibits the test if >10 V is detected between the test rods. For more information,
see Earth Resistance Measurements (1673 FC and 1674 FC).
Safety Pretest
The 1674 FC model includes a Safety Pretest feature that detects any appliance connected to
the circuit under test. The Safety Pretest gives you a warning before you start a test and
prevents damage to appliances from the test voltage. For more information, see Safety
Pretest for Insulation Resistance Measurements.
Mains Wiring Indicator
The terminal diagram in the center of the display indicates if L-PE or L-N terminals are
reversed. The Tester inhibits operation and generates a message that the input voltage is not
between 100 V and 600 V. If the L-PE or the L-N terminals are reversed, the Tester inhibits the
UK Loop and RCD tests.
When the Tester measures a high voltage between two wires, Y shows on the display. See How
to Test a Mains Socket and Ring Installation for more information.
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