Metrel MI 3121 SMARTEC Insulation and Continuity Meter

The Metrel MI 3121 SMARTEC Insulation and Continuity Tester is a professional electrical test instrument designed for insulation resistance and earth continuity testing of low-voltage electrical installations. Combining accurate measurements with straightforward operation, the MI 3121 is ideal for electricians carrying out installation verification, periodic inspections, maintenance and fault finding.

With five selectable insulation test voltages from 50V to 1000V DC and a measuring range of up to 30GΩ, the MI 3121 is suitable for testing electrical installations, protective conductors, equipment insulation and sensitive control circuits.

The large backlit LCD provides both digital readings and an analogue bargraph, while programmable test limits and illuminated PASS/FAIL indicators make interpreting results simple. An integrated memory allows measurements to be stored for subsequent downloading to a computer using optional Metrel EuroLink software.

• Insulation resistance testing at 50V, 100V, 250V, 500V and 1000V DC
• Insulation resistance measurement up to 30GΩ
• Protective conductor continuity testing at 200mA with automatic polarity reversal
• Continuous low-resistance measurement using a 7mA test current
• True RMS AC voltage measurement
• Frequency measurement

• Wide insulation testing range: Five selectable test voltages accommodate a variety of installation and equipment testing requirements.
• 200mA continuity testing: Suitable for verifying protective earth conductors and equipotential bonding connections.
• Automatic polarity reversal: Simplifies continuity testing by automatically reversing the test current polarity.
• PASS/FAIL indicators: Configurable measurement limits with illuminated green and red indicators provide immediate assessment of results.
• Large backlit display: Clear digital readings and an analogue bargraph make results easy to interpret.
• Internal memory: Store up to 1900 measurements for subsequent review or downloading.
• PC connectivity: USB and RS232 interfaces support data transfer using optional EuroLink software.
• Magnetic mounting: Integrated magnetic holder allows convenient hands-free operation on suitable metal surfaces.
• Rechargeable operation: Built-in charging circuit with six rechargeable AA NiMH batteries.
• Robust construction: Designed for professional electrical testing, with CAT III 600V and CAT IV 300V measurement ratings.

• Electrical installation verification and periodic inspection
• Protective earth conductor continuity testing
• Main and supplementary equipotential bonding verification
• Insulation resistance testing of electrical circuits and equipment
• Testing sensitive control, signal and telecommunications wiring using lower insulation test voltages
• Electrical maintenance and fault finding
• Monitoring insulation resistance trends over time

• Metrel MI 3121 SMARTEC Insulation and Continuity Tester
• Soft hand strap
• 2 x 1.5m test leads
• 2 x test probes (red and black)
• 2 x crocodile clips (red and black)
• Power supply adaptor
• 6 x rechargeable AA NiMH batteries
• Instruction documentation
• Calibration certificate

Note: EuroLink PC software is optional and is not included in the standard kit. The MI 3121 is an insulation and continuity tester, not a complete multifunction installation tester or portable appliance tester.