Loop Impedance Meter AMZC-304

The most important features of AMZC-304 are:

Short circuit loop measurement (EN 61557):

Short circuit loop impedance measurement in networks with nominal voltage: 220/380V, 230/400V, 240/415V, with frequency 45…65Hz
Short circuit loop impedance measurement with 15mA current, without triggering RCD.
Detection of the replacement L and N in the socket and automatic swap in the meter.
Low voltage resistance measurement of protective circuits and junctions:
Measurement of resistance with ±200mA current
Calibration of test leads – possibility of using any length of test leads
Rapid check for the correct connection of PE wire using touch electrode.
Measurement of mains voltage and frequency
Power supply from LR6 batteries or NiMH accumulators (option).
The device meets the requirements of IEC 61557 standard.

Short circuit loop impedance Z_L-PE , RCD measurement
Short circuit loop impedance Z_S
Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(6% m.v. + 10 digits)
20,0...199,9Ω	0,1Ω	±(6% m.v. + 5 digits)
200...1999Ω	1Ω
No RCD reaction for I_∆n ≥30mA,
Nominal work voltage Un: 220V, 230V, 240V
Voltage range: 180…270V
Nominal network frequency f_n: 50Hz, 60Hz
Frequency range: 45…65Hz
PE terminal connection correctness check with the help of touch electrode
Short circuit current calculation for nominal voltage

Low voltage resistance measurement

Measurement of continuity of equipotential bondings and protective conductors with ±200mA current

Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(2% m.v. + 3 digits)
20,0...199,9Ω	0,1Ω
200...400Ω	1Ω
Open terminals voltage: 4…9V DC
Output current at R<2Ω: min 200mA ISC: 200...250mA)
Test leads resistance compension
Measurement for both current polarization

“m.v.” - measured value.

Short circuit loop impedance ZL-PE ,ZL-N ,Z L-L , resistance and reactance measurement
Short circuit loop impedance ZS
Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(5% m.v. + 3 digits)
20,0...199,9Ω	0,1Ω
200...1999Ω	1Ω
Nominal work voltage UnL-N / UnL-L : 220/380V, 230/400V, 240/415V
Voltage range 180…270V (for ZL-PE, ZL-N ) and 180…460V (dla ZL-L )
Nominal network frequency fn : 50Hz, 60Hz
Frequency range: 45…65Hz
Maximum measurement current 7,6A for 230V (3x10ms), 13,3A for 400V (3x 10ms)
PE terminal connection correctness check with the help of touch electrode (ZL-PE , ZL-PE(RCD) )
Short circuit current calculation for nominal voltage

Short circuit loop resistance RS and reactance XS

Range	Resolution	Accuracy
0,00...19,99Ω	0,01Ω	±(5% + 5 digits) of ZS value
20,0...199,9Ω	0,1Ω
Calculated and displayed for ZS <200Ω

Low current resistance measurement

Range	Resolution	Accuracy
0,00...199,9Ω	0,1Ω	±(3% m.v. + 3 digits)
200...2000Ω	1Ω
Open terminals voltage4...9V DC
Output current ISC < 8mA
Accustic signal for measured resistance < 30Ω ± 50%
Test leads resistance compensation.

AC voltage measurement
AC voltage measurement
Range	Resolution	Accuracy
0...299,9V	0,1V	±(2% m.v.. + 6 digits)
300...500V	1V	±(2% m.v. + 2 digits)
Frequency range 45...65Hz
Test result refreshing: twice per second

AMZC-304 Specifications
Electrical safety:
Type of insulation	Double, according EN 61010, 61557:2007-01
Measurement category	III 600V (CAT IV 300V)
Protection class acc. to EN 60529	IP67
Other technical data:
Power supply	Package of batteries (AA, 4 pcs.)
Batteries performance (short-circuit loop)	min.5000 measurements
Rated operational conditions:
Operating temperature	0...+50°C
Humidity	20-80%
Rated mains voltage	220/380V, 230/400V, 240/415V

Standard accesories

Optional accesories

Do you want to buy high quality Ohmmeters?

Do not hesitate to contact us, call us today by phone (+34) 982 20 99 20. We are happy to help you.