MRU-10 - Measurement Sonel - Free user manual and instructions
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| Product Type | Digital Multimeter (True RMS) |
| Brand | Sonel |
| Model | MRU-10 |
| Dimensions | 180 x 85 x 55 mm |
| Weight | Approx. 300 g (with battery) |
| Power Supply | 1 x 9V battery (6F22 or equivalent) |
| Display | LCD, 4000 counts with backlight |
| Safety Rating | CAT III 600 V, CAT II 1000 V |
| Ingress Protection | IP20 |
| DC Voltage Range | 0.1 mV to 1000 V (auto-ranging) |
| AC Voltage Range | 0.1 mV to 750 V (True RMS, 40 Hz - 1 kHz) |
| DC Current Range | 0.1 µA to 10 A (auto-ranging) |
| Resistance Range | 0.1 Ω to 40 MΩ |
| Capacitance Range | 1 nF to 100 µF |
| Frequency Range | 10 Hz to 1 MHz |
| Special Functions | Continuity test, diode test, data hold, relative mode |
| Auto Power Off | Yes (after approx. 15 min of inactivity) |
| Accessories Included | Test leads, 9V battery, manual, carrying case |
| Cleaning Instructions | Use a dry, soft cloth. Do not use solvents or abrasive cleaners. |
| Repair and Spare Parts | Contact an authorized Sonel service center for repairs and spare parts. |
| Standards Compliance | IEC 61010, EN 61326 |
Frequently Asked Questions - MRU-10 Sonel
How do I measure DC voltage with the Sonel MRU-10?
Set the rotary switch to the V⎓ position. Connect the black lead to COM and red lead to V/Ω. Touch the probes to the circuit in parallel. Read the value on the display. The meter auto-ranges.
Why is my multimeter not showing any reading?
Check the battery voltage. Replace the 9V battery if low. Also ensure the test leads are properly inserted and the rotary switch is set to the correct function.
How do I test continuity?
Turn the dial to the continuity /diode test position (usually a speaker icon). Insert black lead to COM and red to V/Ω. Place probes across the circuit. A beep indicates continuity (resistance < 50 Ω).
What does 'OL' on the display mean?
OL stands for Overload. It means the measured value exceeds the range. Select a higher range manually if auto-ranging is disabled, or remove the meter from the circuit.
Can I measure AC current with the MRU-10?
Yes. Set the dial to A∼. Connect the black lead to COM and red to the mA/A jack (for currents up to 10A). Break the circuit and insert the meter in series. Observe polarity.
How often should I calibrate the multimeter?
Sonel recommends annual calibration to ensure accuracy. Contact an authorized calibration center or Sonel service for recalibration.
What is the input impedance for voltage measurements?
The input impedance is typically 10 MΩ for DC and AC voltage ranges, which minimizes loading effect on the circuit.
How do I replace the battery?
Remove the battery cover on the back. Discard the old 9V battery and insert a new one (6F22 or equivalent) observing polarity. Replace the cover.
What safety precautions should I take when using the MRU-10?
Always use the correct CAT rating for your measurement. Do not exceed 600V in CAT III environments. Inspect leads for damage before use. Never measure voltages above the rated limit.
How do I clean the multimeter?
Use a dry, soft cloth to wipe the exterior. Do not use water, solvents, or abrasive cleaners. Avoid getting moisture inside the input jacks.
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