MZC-305

• Loop impedance measurement with resolution 0,01 Ω
• Loop impedance measurement without tripping the circuit breaker > 30 mA with resolution 0,01 Ω (100…440 V)
• Measurements possible in installations 110/190 V, 115/200 V, 127/220 V, 220/380 V, 230/400 V, 240/415 V, 290/500 V and 400/690 V (range 100…750 V)
• Short circuit current indication
• Voltage measurement up to 750 V and up to 250 V with resolution 0,1 V
• Measurements using Uni-Schuko adapter or test wires 1,2; 5; 10 and 20 m
• Memory of 990 records
• USB connection with PC
• Powered by disposable or rechargeable (4xAA)

Measurement of short circuit loop impedance (Z_L-PE, Z_L-N, Z_L-L)

Measuring range according to IEC61557: 0,13…1999 Ω for 1,2 m test leads; 0,25…1999 Ω for UNI-SCHUKO adapter

• rated operating voltage Un_L-N/ Un_L-L: 110/190 V, 115/200 V, 127/220 V, 220/380 V, 230/400 V, 240/415 V, 290/500 V, 400/690 V,
• operating voltage range: 100…440 V (for Z_L-PE and Z_L-N) and 100…750 V (for Z_L-L)
• high current measurement (up to 30 A),
• operating frequency range: 45…65 Hz,
• control of correctness of PE terminal connection by means of a contact electrode (applicable to Z_L-PE),
• measurement is also possible when L and N circuits are swapped,
• measurement of resistance and reactance components,
• short circuit current calculation.

Measurement of short circuit loop impedance ZL-PE RCD (without RCD tripping)

Measuring range according to IEC61557: 0,43…1999 Ω for 1,2 m test leads; 0,50…1999 Ω for UNI-SCHUKO adapter

• operating voltage range: 100 … 440 V,
• rated operating voltage Un: 110 V, 115 V, 127 V, 220 V, 230 V, 240 V, 390 V, 400 V,
• control of correctness of PE terminal connection by means of a contact electrode,
• measurement is also possible when L and N circuits are swapped,
• measurement of resistance and reactance components,
• short circuit current calculation.

Voltage measurement

• measurement available for all settings of short-circuit loop (Z_L-PE, Z_L-PE RCD and Z_L-N,_L-L),
• frequency range 45…65 Hz,
• overvoltage alarm.

Electrical safety:

• type of insulation: double, according to IEC 61010 – 1
• measurement category: CAT IV 600 V (CAT III 1000 V)
• protection class acc. to EN 60529: IP54

Other technical data

• power supply: alkaline batteries or NiMH rechargeable batteries, size AA (4 pcs)
• number of Z measurements (for alkaline batteries): >3000 (2 measurements per minute)
• time to Auto-OFF: 120 seconds
• data transmission: USB
• memory of measurement results: 990 cells, 3500 entries
• display: LCD segment
• dimensions: 260 x 190×60 mm
• meter weight: ca. 2,2 kg

Rated operational conditions:

• operating temperature: 0…+45°C
• storage temperature: -20…60°C
• humidity 20 – 80%

The instrument meets the requirements of EMC standards