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Table of Contents
Related Manuals for Sonel MRU-10
Summary of Contents for Sonel MRU-10
- Page 2 MRU-10 – USER MANUAL...
- Page 3 USER MANUAL EARTH RESISTANCE METER MRU-10 SONEL S.A. Wokulskiego 11 58-100 Świdnica Version 1.01 13.02.2020...
- Page 4 The MRU-10 meter is a modern, easy and safe measuring device. Please acquaint yourself with this manual in order to avoid measuring errors and prevent possible problems in operation of the meter. MRU-10 – USER MANUAL...
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Page 5: Table Of Contents
3P .. 21 9.2.3 Additional uncertainties according to IEC 61557-5 (R 3P) ..........22 10. Accessories ....................22 10.1 Standard accessories .................... 22 10.2 Optional accessories ....................22 11. Manufacturer ....................23 12. Laboratory services ..................24 MRU-10 – USER MANUAL... -
Page 6: Safety
MRU-10 meter is designed to measure earth resistance values. Any application that differs from those specified in the present manual may result in a damage to the device and constitute a source of danger for the user. -
Page 7: Turning The Meter On And Activating Screen Backlight
ON and then OFF the screen backlight; To turn OFF the device, press and hold ON/OFF button for approx. 2 sec- onds. A screen indicating shut- ting off the device is shown briefly. MRU-10 – USER MANUAL... -
Page 8: Meter Configuration
Short press START but- ton to accept the selected value. You will enter the screen with settings of audio messages - bEEP. Use UP and DOWN but- tons to turn the audio messages ON ( ) or OFF ( MRU-10 – USER MANUAL... - Page 9 You will enter the screen with measuring voltage selection Un. Use UP and DOWN but- tons to set the measuring voltage at 25 V or 50 V. The measuring voltage set relates to all meas- urement functions in the meter. MRU-10 – USER MANUAL...
- Page 10 Short press (> 2 s) ON/OFF button to enter the measurement screen 3P without accepting the changes introduced at the current setting po- sition. MRU-10 – USER MANUAL...
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Page 11: Measurements
24 V but lower than 40 V, the "NOISE!" and measurement is blocked. The interference voltage is lower than 24 V, but with a high value - the measurement result may be affected by "NOISE!" additional uncertainty. MRU-10 – USER MANUAL... -
Page 12: Measurement Of Earth Resistances With 3-Wire Method (R 3P)
R The meter is in the mode of measuring the interfer- ence voltage between the test terminals. The measuring voltage is compatible with the volt- age selected when set- ting up the device. MRU-10 – USER MANUAL... - Page 13 Use UP button to view the component results in the following order: R ERU , where: – resistance of probe H – resistance of probe S ER – additional uncertain- ty resulting from the probes - interference voltage MRU-10 – USER MANUAL...
- Page 14 In majority of cases the achieved measurement accuracy is satisfactory. However, you should always be aware of the uncertainty included in the measurement. MRU-10 – USER MANUAL...
- Page 15 Flashing edges of symbols: E or H or S, two or all three at Flashing edges the same time: disconnected one, two or three leads to the terminals, or the resistance of the auxiliary electrode/s/ is outside the measuring range. MRU-10 – USER MANUAL...
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Page 16: Measurement Of Earth Resistances Using 2-Wire Method (R 2P)
Test leads should be connected to the measurement terminals in the device, as shown above. In order to start the measurement, press START button. MRU-10 – USER MANUAL... - Page 17 24 V but lower than 40 V, the "NOISE!" and measurement is blocked. The interfering signal (noise signal) is below 24 V, but with "NOISE!" a high value - the measurement result may be affected by additional uncertainty. MRU-10 – USER MANUAL...
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Page 18: Power Supply
Message bAtt indicates that batter- ies/rechargeable batter- ies are totally discharged, all measurements are blocked. The meter switches off automatically after 5 sec. MRU-10 – USER MANUAL... -
Page 19: Replacing (Rechargeable) Batteries
Replacing (rechargeable) batteries MRU-10 is powered by four AA alkaline LR6 batteries or rechargeable batteries of NiMH type. The (rechargeable) batteries are placed in the compartment at the bottom of the enclosure. The de- vice is not equipped with an internal battery charger. Rechargeable batteries must be recharged in an external charger. -
Page 20: General Principles Regarding Using Ni-Mh Rechargeable Batteries
- Do not charge or use the batteries in extreme temperatures. Extreme temperatures reduce the life- time of batteries and rechargeable batteries . Avoid placing devices powered by rechargeable batter- ies in very hot environments. The nominal working temperature must be absolutely observed. MRU-10 – USER MANUAL... -
Page 21: Cleaning And Maintenance
Worn-out electronic equipment should be sent to a collection point in accordance with the law of waste electrical and electronic equipment. Before the equipment is sent to a collection point, do not dismantle any elements. Observe local regulations concerning disposal of packages, waste batteries and accumulators. MRU-10 – USER MANUAL... -
Page 22: Technical Data
Maximum interference voltage for the R measurement is 24 V. Measurement of resistance of auxiliary earth electrodes R and R Range Resolution Basic uncertainty 0...999 Ω 1 Ω 1.00...9.99 kΩ 0.01 kΩ ±(5% + 8 digits) 10.0…19.9 kΩ 0.1 kΩ MRU-10 – USER MANUAL... -
Page 23: Additional Data
kΩ 100000 > 5 kΩ or R > 5 kΩ > 5kΩ or R and R [Ω], R [Ω] and R [Ω] are values displayed by the device. MRU-10 – USER MANUAL... -
Page 24: Additional Uncertainties According To Iec 61557-5 (R E 3P)
Additionally, the following items that are not included in the scope of standard equipment can be purchased from the manufacturer or the distributors: NAME INDEX PICTURE Probe driven into the ground (30 cm) WASONG30 Probe driven into the ground (80 cm) WASONG80 Vise clamp (banana plug) WAZACIMA1 MRU-10 – USER MANUAL... -
Page 25: Manufacturer
The manufacturer of the device and provider of guarantee and post-guarantee service: SONEL SA Wokulskiego 11 58-100 Świdnica Poland tel. +48 74 858 38 60 fax +48 74 858 38 09 E-mail: export@sonel.pl Web page: www.sonel.pl Note: Service repairs must be performed only by the manufacturer. MRU-10 – USER MANUAL... -
Page 26: Laboratory Services
National Metrological Institute. According to ILAC-G24 „Guidelines for determination of calibration intervals of measuring instru- ments”, SONEL S.A. recommends periodical metrological inspection of the instruments it manufac- tures no less frequently than once every 12 months. - Page 27 MRU-10 – USER MANUAL...
- Page 28 MRU-10 – USER MANUAL...
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