Cầu đo điện trở 1 chiều SONEL- BA LAN, MMR-620, 0-1999 Ω

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Hãng sản xuất: Sonel- Ba Lan

Xuất xứ: Ba Lan

Bảo hành 12 Tháng

·         Measurement of resistive object type:

– welded and soldered connections, equipotential bonding, earth wire,

– terminals and connectors, rail welded joints, cables and wires,

– measurement 4-pole method.

·         Measurement of inductive object type:

– coils (motors and transformers), low resistance coils.

·         Range selection autoranging or manual (measurement of inductive object type).

·         Selectable measurement mode adjusted to object type:

– for resistive objects – fast mode (3 seconds),

– for inductive objects – long mode with automatic discharge after measurements (or with lower accuracy – shorter mode).

·         Selectable measurement mode adjusted to application:

– normal mode – after pushing „START” button,

– automatic mode – since test leads are connected to the object meters automatically starts measurement with dual direction current flow and gives average result – what eliminates eventual DC voltage on tested object,

– continuous mode – every 3 seconds for resistive objects or continuous measurement for inductive objects.

·         Window mode:

– this option enables setting an upper and a lower limit between which the average measurement result is bound to appear. The results outside of this range will be indicated by two long audible signals and the symbols.

·         MMR-630 is designated not to be effected by interference up to 20 mV and to show noises from 20 to 100 mV (so in edge conditions even 5 times higher than measured drop of potential).

·         Memory store for up to 990 results and a communications facility for transferring data from the device to a PC.

Electric security:

– type of insulation: double, according to EN 61010 – 1 and IEC 61557

– measurement category: CAT III 300 V acc. to EN 61010 – 1

– protection class acc. to EN 60529: IP54

Other technical data:

– meter’s power supply: battery package SONEL/Ni-MH 4,8 V

– battery charging time: approx. 2,5 hours

– number of measurements with the current of 10 A: 300

– auto-off time: 120 seconds

– immunity to interference: additional error ≤1% for voltage 50 Hz ≤100 mV RMS

– maximum leads resistance for the 10 A current: 0,1 Ω

– maximum inductance of the tested object: 40H

– accuracy of the test current: ±10%

– resistance measurement time:

– with the selected resistive object type with the bidirectional current: 3 seconds

– with the selected inductive object type, dependant on the resistance

and inductance of the object: a few minutes (max. 10)

– dimensions: 295 x 222 x 95 mm

– weight: approx. 1,7 kg

Rated operational conditions:

– operation temperature: 0…+40°C

– storage temperature: -20…+60°C

MMR-620 microohmmeter conforms the following directives

or standards according to CE requirements.


Low Voltage Directive (LVD) 73/23/EEC, 93/68/EEC.


EN 61010 – 1:2001 Safety requirements for electrical equipment for measurement, control and laboratory use. General requirements .

EN 61010 – 031:2002: Safety requirements for electrical equipment for measurement, control and laboratory use. Safety requirements for hand-held probe assemblies for electrical measurement and test.


Electromagnetic compatibility (EMC) 89/336/EEC, 92/31/EEC, 93/68/EEC.


EN 61326:1997+A1:1998+A2:2001 Electrical equipment for measurement, control and laboratory use – EMC requirements.

Resistance measurement



Voltage for the

full scale






10 A

20 mV

±(0,25%m.v. + 2 digits)

1,000…1,999 mΩ

0,001 mΩ

2,00…19,99 mΩ

0,01 mΩ

200 mV

20,0…199,9 mΩ

0,1 mΩ

1 A

200…999 mΩ

1 mΩ

0,1 A

2,00…19,99 Ω

0,01 Ω

20,0…199,9 Ω

0,1 Ω

1 mA

200…1999 Ω

1 Ω

0,1 mA

– input impedance of the voltmeter: ≥200 kΩ

„m.v.” – measured value.



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