RuoShui Digital Clamp Multimeter User Manual

1. Introduction

This Digital Clamp Multimeter instrument is a 6000 Counts hand-held automatic range True RMS clamp digital meter. Its circuit design is centered around a large-scale integrated circuit ∑/Δ analog-to-digital converter (ADC) and features a full-range overload protection circuit. It is designed to measure AC and DC voltage, low-pass filter VFC voltage, low impedance Low Z voltage, AC and DC current, resistance, diode, continuity, capacitance, frequency, duty cycle, and temperature. The device also includes data retention, relative value measurement, surge current measurement (INRUSH), flashlight function, NCV (Non-Contact Voltage) function, live wire judgment, under-voltage display, and automatic shutdown capabilities.

Figure 1: RuoShui Digital Clamp Multimeter (Model 610B shown)

2. Safety Information

To ensure safe operation and avoid damage to the meter, please read this manual carefully before use. Always adhere to the following safety precautions:

• Do not exceed the maximum input values for any function.
• Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
• Disconnect the test leads from the circuit before changing functions.
• Ensure the function dial is set to the correct range before making measurements.
• Do not operate the meter if it appears damaged or if the case is open.
• Replace the battery immediately when the low battery indicator appears.
• Always use the correct terminals, function, and range for measurements.
• Do not use the meter in explosive atmospheres.

3. Product Features

The RuoShui Digital Clamp Multimeter offers a comprehensive set of features for various electrical measurements:

• Display Type: Digital Only, 6000 Counts.
• Jaw Opening: 40mm, suitable for various wire measurements.
• Measurement Capabilities:
  • AC/DC Current (up to 1000A)
  • AC/DC Voltage (up to 1000V)
  • Resistance (up to 60MΩ)
  • Capacitance (up to 10mF)
  • Frequency (10Hz~10MHz)
  • Temperature (-20℃ to 1000℃ / -4℉ to 1832℉)
• Special Functions:
  • True RMS measurement for accurate readings on non-sinusoidal waveforms.
  • NCV (Non-Contact Voltage) detection.
  • Live Wire Detecting.
  • Low Impedance (LowZ) voltage measurement.
  • VFC (Variable Frequency Control) frequency converter signal measurement (610B+ only).
  • INRUSH current measurement.
  • Data Hold function.
  • Max/Min value recording.
  • Continuity alarm.
  • Diode test.
  • Flashlight for illuminated work areas.
  • Backlit display for low-light conditions.
  • Automatic power off (approx. 15 minutes of inactivity).
  • Low voltage display.
  • Overload Protection.
• Design: Two-color injection molding for durability and ergonomic grip.

Figure 2: Key features of the 610C+ model.

Figure 3: Visual representation of various functions.

4. Components Overview

Familiarize yourself with the main components of your clamp multimeter:

• Clamp Jaw: Used for non-contact current measurement. The jaw can open up to 40mm.
• Function Dial: Rotary switch to select the desired measurement function (e.g., V, A, Ω, Hz, °C/°F, NCV/Live).
• LCD Display: Digital screen showing measurement readings, units, and function indicators.
• Buttons:
  • REL/ button: Relative value measurement.
  • HOLD B/L button: Data hold and backlight control.
  • ZERO/INR button: Zeroing function and INRUSH current measurement.
  • SELECT LowZ VFC button: Selects LowZ or VFC functions.
  • Hz % °C/°F button: Selects Frequency, Duty Cycle, or Temperature units.
• Input Jacks:
  • COM (Common) jack: For black test lead.
  • VΩ-H-Live°C°F jack: For red test lead, used for voltage, resistance, capacitance, frequency, diode, continuity, live wire, and temperature measurements.

Figure 4: Large jaw design for various wire measurements.

5. Setup

5.1 Battery Installation

The multimeter requires two 1.5V AAA batteries (not included). To install or replace batteries:

1. Ensure the meter is turned OFF.
2. Locate the battery compartment cover on the back of the meter.
3. Use a screwdriver to open the cover.
4. Insert two AAA batteries, observing the correct polarity (+ and -).
5. Replace the battery compartment cover and secure it with the screw.

5.2 Connecting Test Leads

For most measurements (voltage, resistance, capacitance, frequency, diode, continuity, temperature, live wire), connect the test leads as follows:

• Insert the black test lead into the COM (Common) jack.
• Insert the red test lead into the VΩ-H-Live°C°F jack.

Current measurements using the clamp jaw do not require test leads.

6. Operating Modes

To select a measurement function, turn the function dial to the corresponding position. Some positions may require pressing the SELECT button to cycle through sub-functions.

6.1 AC/DC Current Measurement

To measure AC or DC current:

1. Turn the function dial to the 60A/600A/1000A position.
2. For AC current, ensure the display shows 'AC'. For DC current (610B+ only), press the FUNC button to switch to 'DC'. (Note: Model 610C+ only measures AC current).
3. Open the clamp jaw and enclose a single conductor (not a power cord with multiple wires) through the center of the jaw.
4. Read the current value on the LCD display.

Figure 5: Measuring AC/DC current using the clamp jaw.

Figure 6: Alternating Current Test setup.

6.2 Voltage Measurement (AC/DC, LowZ, VFC)

To measure voltage:

1. Turn the function dial to the V~ (AC Voltage) or V- (DC Voltage) position. The meter will automatically select the range.
2. Connect the black test lead to the COM jack and the red test lead to the VΩ-H-Live°C°F jack.
3. Touch the test probes to the circuit points where you want to measure voltage.
4. Read the voltage value on the LCD display.

LowZ Voltage: For measurements where ghost voltages might be present, select the LowZ function (if available on your model) to get a more accurate reading by providing a low impedance path.

VFC Voltage (610B+ only): To measure Variable Frequency Control (VFC) signals, turn the dial to the VFC position. This function is designed for fast and high-precision measurements of frequency converter signals.

Figure 7: VFC frequency conversion signal measurement (610B+ only).

6.3 Resistance, Diode, Continuity, Capacitance, Frequency, Duty Cycle, Temperature

These functions are typically grouped on the function dial. Turn the dial to the appropriate symbol (e.g., Ω for resistance, ⊥ for diode, 🔊 for continuity, ⊤ for capacitance, Hz for frequency, °C/°F for temperature). Use the SELECT button to cycle through sub-functions if necessary. Connect test leads as described in Section 5.2 and apply probes to the circuit or component under test.

6.4 NCV (Non-Contact Voltage) Measurement

To detect AC voltage without contact:

1. Turn the function dial to the NCV/Live position. The display will show "NCV".
2. Bring the top of the clamp meter close to the conductor or outlet.
3. The meter will indicate the presence of AC voltage through audible beeps and visual indicators on the display.
   • Weak magnetic field signal: Display shows "---" (short bar characters), slow beep.
   • Strong magnetic field signal: Display shows "----" (long bar characters), rapid beep.

Figure 8: NCV induction measurement.

6.5 Live Wire Detecting

To identify a live wire:

1. Turn the function dial to the NCV/Live position. Press SELECT until "Live" is indicated.
2. Insert the red test lead into the VΩ-H-Live°C°F jack.
3. Touch the red probe to the wire you suspect is live. The meter will indicate if it's a live wire.

6.6 INRUSH Current Measurement

The INRUSH function measures the initial surge current when a device is turned on, which can be significantly higher than the steady-state current.

1. Turn the function dial to an AC current range.
2. Press the ZERO/INR button to activate the INRUSH function.
3. Open the clamp jaw and enclose the conductor of the device you want to test.
4. Turn on the device. The meter will capture and display the peak inrush current.

6.7 Other Functions

• Data Hold: Press the HOLD B/L button to freeze the current reading on the display. Press again to release.
• Backlight: Press and hold the HOLD B/L button to turn the display backlight on or off.
• Max/Min: Press the MAX/MIN button (if available on your model) to record the maximum and minimum values during a measurement.
• Auto Power Off (APO): The meter will automatically power off after approximately 15 minutes of inactivity to conserve battery life.

7. Specifications

Detailed technical specifications for the RuoShui Digital Clamp Multimeter (Models 610B and 610C):

Figure 9: Detailed technical parameters for models 610B+ and 610C+.

8. Maintenance

8.1 Cleaning

Wipe the case with a damp cloth and a mild detergent. Do not use abrasives or solvents. Periodically wipe the terminals with a cotton swab and detergent; dirt or moisture in the terminals can affect readings.

8.2 Battery Replacement

When the low battery indicator appears on the display, replace the batteries as described in Section 5.1. Always use two fresh 1.5V AAA batteries.

9. Troubleshooting

• No display or faint display: Check battery installation and charge. Replace batteries if necessary.
• "OL" or "-OL" on display: Indicates an over-range condition. Select a higher range or ensure the measured value is within the meter's capabilities.
• Inaccurate readings:
  • Check test lead connections.
  • Ensure the correct function and range are selected.
  • Verify battery charge.
  • Clean test leads and input jacks.
• No NCV detection: Ensure the function dial is set to NCV/Live and the meter is brought close enough to an AC voltage source.

10. User Tips

• For current measurements, always clamp around a single conductor, not an entire power cord, to get an accurate reading.
• Utilize the backlight feature in dimly lit environments for better visibility of the display.
• The auto-ranging feature simplifies operation, but always double-check the units displayed to ensure you are reading the correct measurement.
• Remember that the 610C+ model measures only AC current, while the 610B+ measures both AC and DC current.
• The VFC function on the 610B+ is particularly useful for troubleshooting variable frequency drives and other non-sinusoidal AC signals.

11. Warranty and Support

11.1 Warranty

RuoShui (Victor) instruments are 100% genuine and original. A 1-year warranty is provided for all products, excluding items damaged and/or misused after receipt. Accessories come with a 3-month warranty. Defective items must be reported and returned within the warranty period, preferably in their original packaging.

11.2 Support

If you encounter any problems with your order or product, please contact the seller directly for assistance. They will endeavor to provide the best solution. Avoid leaving negative feedback before contacting support, as this may hinder resolution.

Please note that batteries are not included with the product due to safety regulations during shipping. The seller is not responsible for any custom duties or import taxes.