Loop impedance meter MZC-304 with Calibration Certificate WMPLMZC304F

Loop impedance meter – precision and versatility in one device

This compact loop impedance meter Sonel MZC-304 is an indispensable tool for professionals and those involved in electrical installations. The device combines functionality, accuracy and ease of use, enabling comprehensive measurements in 230/400 V networks. The meter performs loop impedance measurements with a resolution of 0.01 Ω, and also checks the continuity of protective and equipotential connections. This ensures full control over the safety of the electrical installation.

Functionality and application

MZC-304 is not only a loop impedance meter. The device offers a range of additional functions, such as voltage and frequency measurement, as well as calculation of expected short-circuit current. The ability to measure impedance with a small current in circuits protected by RCDs (≥30 mA) allows for safe and precise testing in sensitive installations. This makes the meter suitable for both residential buildings, office buildings and industrial plants. A sealed housing (IP67) guarantees reliable operation even in harsh environmental conditions.

Key features and benefits

• Precise measurements: 0.01 Ω resolution ensures accurate loop impedance measurement results.
• Versatility: Measurement of impedance, voltage, frequency and short-circuit current in one device.
• Safety: Ability to measure in circuits with RCDs without tripping them.
• Durability: Sealed IP67 housing protects against external factors.
• Ease of use: Backlit keyboard and clear display make it easy to work in low light conditions.
• Memory: Storage of up to 990 results with the ability to transmit data to a computer via Bluetooth facilitates documentation of measurements and report creation.
• Compliance with standards: Meets the requirements of PN-EN 61557 standard, which guarantees the reliability and accuracy of measurements.
• Touch electrode: Quick check of the correct connection of the PE conductor increases work comfort and safety.

Technical specifications – what is worth knowing?

The MZC-304 meter allows operation in networks with voltages of 220/380 V, 230 V/400 V and 240/415 V (operating range 180…460 V). The maximum measurement current is 7.6 A for 230 V (3x10 ms) and 13.3 A for 400 V (3x10 ms). The operating frequency is in the range of 45…65 Hz. The device can be powered by alkaline batteries (4 x LR6) or NiMH batteries. Calculation of short-circuit current I_k is possible based on selected nominal network voltages.

Standard equipment

The set with the meter includes: AA LR6 alkaline battery (4 pcs.), protective case M-6, meter straps M-1, bracket - suspension for the M-1 type housing, and a calibration certificate. Additionally, WS-05 adapter and red, blue and yellow measuring leads with a length of 1.2 m with banana plugs, as well as red and blue pointed probes with banana sockets are provided.

The Sonel MZC-304 meter is an investment in safety and professionalism – a reliable tool for every electrician!