MRU-21

Earth Resistance Meter

Danh mục: Thiết bị đo điện trở suất và điện trở đất

Datasheet

User Manuals

Declarations of conformity

Mô tả Specs Details Overview Components Packages Resources Additional Modules Complementary products Architecture Tools Benefits Features Customer Ordering
Thông số Specs Details Overview Components Packages Resources Additional Modules Complementary products Architecture Tools Benefits Features Customer Ordering

Possible measurements:

earth resistance measurment with 3-pole method,
measurement of continuity of equipotential bondings and protective conductors with auto-zero function – with current 200 mA,
resistance measurement using 2-pole method.

Measurement of earthing resistance
measurement range to IEC61557 – 5:
0,50 Ω…1,99 kΩ for Un=50 V;
0,68 Ω…1,99 kΩ for Un=25 V;

Range	Resolution	Accuracy
0,00…9,99 Ω	0,01 Ω	±(2% m.v. + 3 digits)
10,0…99,9 Ω	0,1 Ω
100…999 Ω	1 Ω
1,00k…1,99 kΩ	0,01 kΩ

• measurement current: under short circuit >20 mA,
• voltage on open terminals: selectable <25 V AC or <50 V AC,
• frequency of measurement current: 125 Hz

Measurement of interference voltage U_N (RMS)

Range	Resolution	Accuracy
0…100 V	1 V	±(2% m.v. + 3 digits)

• measurement for DC and AC 45…65 Hz

Measurement of resistance of auxiliary electrodes R_H i R_S

Range	Resolution	Accuracy
0…999 Ω	1 Ω	±(5% (R_S+R_E+R_H) + 3 digits)
1,00k…9,99 kΩ	0,01 kΩ
10,0k…50,0 kΩ	0,1 kΩ

Measuremet of continuity of equipotential bondings and protective conductors
measurement range to IEC61557 – 4: 0,13 Ω…199 Ω

Range	Resolution	Accuracy
0,00…9,99 Ω	0,01 Ω	±(2% m.v. + 3 digits)
10,0…99,9 Ω	0,1 Ω
100…199 Ω	1 Ω

measuring method: technical 2-pole method,
max. voltage on open terminals: 13 V,
measurement current: under short circuit >200 mA,
auto-zero function for measurement leads

Electric security:

type of insulation: double, according to EN 61010 – 1and IEC 61557
measurement category: CAT IV 300 V acc. to EN 61010 – 1
protection class acc. to EN 60529: IP54

Rated operational conditions:

operation temperature: -10…+55°C
storage temperature: -20…+70°C
humidity: 20…80%

Other technical data:

LCD display: segment, backlit
interface: USB,
number of measurements carried out of set of batteries: > 1000 (5 Ω, 2 meas./min.)
warranty: 2 years
dimentions: 288 x 223×75 mm
weigth: 1,4 kg