Earth Resistance Meter-MRU 21
Make: Sonel (Made in Poland )
Model Code: Sonel MRU-21
Part Code: MRU-10
Order Code: KLSO091021
MRU-21 is designed as a reliable measuring instrument, which is both technically advanced and easy to use.
Features:
✔ Measurement of resistance of auxiliary electrodes RS and RH
✔ Measurement of interference voltage
✔ Selection of maximum measuring voltage (25 V and 50 V)
✔ Auto-zero function for the resistance of measurement leads (RCONT zero)
SKU: KLSO091010
Brand Category: Sonel (Poland)
Product Category: Earth Resistance
Warranty: 2 Years (against manufacturing defects only)
Note: Demo Available
Basic measurements of earthing systems and continuity of connections
The Earth Resistance Meter-MRU-21 is a simple meter which makes it possible to measure earthing with the use of the technical method and to measure the continuity of protective and equalising connections.
Characteristic features of this model include very simple operation, excellent resistance to interference and high measurement precision. The meter allows for earth resistance measurements with auxiliary electrodes using the 3p method, as well as 2p resistance measurements. The device is also suitable for testing the continuity of equalising and protective connections. The Sonel Earth Resistance Meter- Sonel MRU-21 meter is dedicated to employees of the power and electricity industry.
Measurement methods
- 3-wire method – measurement of earthing systems using auxiliary probes
- 2-wire method – simplified measurement of resistance-to-earth
- Resistance of earth and compensatory conductors measured using current ≥200 mA with auto-zero function – meets the requirements of EN 61557-4
Additional features
- Measurement of resistance of auxiliary electrodes RS and RH
- Measurement of interference voltage
- Selection of maximum measuring voltage (25 V and 50 V)
- Auto-zero function for the resistance of measurement leads (RCONT zero)
Application
MRU-21 is designed as a reliable measuring instrument, which is both technically advanced and easy to use. It is suitable for tests in industrial plants and in companies providing electrical measurement services. MRU-21 allows user to test individual earth electrodes and systems with multiple earthing electrodes.
Technical Data
Technical Specifications
Type of insulation according to EN 61010-1 and IEC 61557
double
Measuring category according to EN 61010
III 600 V / IV 300 V
Ingress protection
IP54
dimensions
288 x 223 x 75 mm
11.3” x 8.8” x 3.0”
weight
ca. 1.4 kg
ca. 3.1 lbsstorage temperature
-20…+70°C
-2...+157°F
operating temperature
-10…+55°C
14...131°Fhumidity
20…90%
Nominal temperature
23 ± 2°C
73.4°F ± 3.6°FReference humidity
40%…60%
Memory of measurement results
990 results
data transmission
USB
Quality standard – development, design and production
ISO 9001
Accessories/ Probes
Reflectors, self-adhesive (1 pack = 5 off, each 150 mm long)
Order Number: 0554 0493
ISO calibration certificate/rpm
Order Number: 0520 0012
Downloads
Product Brochures
➤ Datasheet Earth Resistance Meter- Sonel MRU-21
Manuals
➤ Instruction manual Earth Resistance Meter- Sonel MRU-21
