1. Overview
The KUAIQU KM61C is a new generation high-performance True RMS digital multimeter designed for professional electricians, enthusiasts, and families. It features a clear display and intuitive function layout for an enhanced user experience. This instrument is capable of measuring AC/DC voltage, AC/DC current, resistance, capacitance, frequency, duty cycle, and temperature, along with diode and continuity tests, and Non-Contact Voltage (NCV) detection.
2. Package Contents
The KUAIQU KM61C Digital Multimeter package includes the following items:
- 1 x KM61C Multimeter
- 1 pair of alligator clips (red and black)
- 1 pair of multimeter probes (red and black)
- 1 x Temperature probe
- 1 x Color Box
- 1 x User Manual (this document)
3. Instrument Panel Description
Familiarize yourself with the various parts of your multimeter:
- NCV Inductive Indicator: Lights up during Non-Contact Voltage detection.
- LCD Display: Shows measurement readings and other information.
- Function Key (FUNC): Used to switch between multiple measuring functions on a single gear.
- Function Knob: Rotary switch to select the main measurement mode.
- Measure Input Socket: Input for voltage, resistance, capacitance, frequency, and temperature measurements.
- COM Input Socket: Common negative input terminal for all measurements.
- 10A Current Input Socket: Input for high current (up to 10A) measurements.
- Light: Button for backlight and flashlight control.
- Support: Kickstand for propping up the multimeter.
Buttons:
- FUNC Key: When there are multiple measuring functions on a gear, press this key to switch between them.
- HOLD Key: Press to enter/cancel data hold mode, which locks the current reading on the display.
- MAX Key: Press to enter/cancel Maximum measurement mode, which captures the highest reading.
- Light/Flashlight Key: Short press to toggle backlight on/off. Press and hold for more than 2 seconds to turn the flashlight on/off.
4. Setup
4.1 Battery Installation
The multimeter requires 2 x 1.5V AAA batteries. To install or replace batteries, open the battery compartment cover on the back of the device, insert the batteries according to polarity markings, and close the cover securely.
4.2 Connecting Test Leads
Always ensure the multimeter is OFF before connecting or disconnecting test leads. For most measurements, the black probe connects to the 'COM' input socket, and the red probe connects to the 'Measure' input socket (VΩHz). For high current measurements, the red probe connects to the '10A' input socket.
5. Operating Instructions
WARNING: To avoid possible accidents such as electric shock or personal injury, please follow all safety regulations and instructions carefully. Do not measure voltage above 600V or current above 10A, as this may damage the instrument or cause harm.
5.1 DC/AC Voltage Measurement (V)
- Turn the function knob to the 'V' position. Use the 'FUNC' key to switch between AC and DC voltage functions.
- Insert the red probe into the 'Measure' input socket (VΩHz) and the black probe into the 'COM' socket.
- Contact the probes to the measured circuit or power supply in parallel.
- Read the measurement result on the screen.
5.2 DC/AC mV Voltage Measurement (mV)
- Turn the function knob to the 'mV' position. Use the 'FUNC' key to switch between AC and DC mV voltage functions.
- Insert the red probe into the 'Measure' input socket (VΩHz) and the black probe into the 'COM' socket.
- Contact the probes to the measured circuit or power supply in parallel.
- Read the measurement result on the screen.
5.3 Frequency/Duty Measurement (Hz%)
- Turn the function knob to the 'Hz%' position. Use the 'FUNC' key to switch between Frequency and Duty Cycle functions.
- Insert the red probe into the 'Measure' input socket (VΩHz) and the black probe into the 'COM' socket.
- Contact the probes to the measured circuit.
- Read the measurement result on the screen.
5.4 DC/AC Current Measurement (µA, mA, A)
- Turn the function knob to the appropriate current range (µA, mA, or A). Use the 'FUNC' key to switch between AC and DC current functions.
- For µA/mA measurements, insert the red probe into the 'Measure' input socket (VΩHz). For 10A measurements, insert the red probe into the '10A' input socket. Always insert the black probe into the 'COM' socket.
- Disconnect the power of the tested circuit. Connect the multimeter in series with the circuit under test, then turn on the circuit power supply.
- Read the measurement result on the screen.
WARNING: When measuring large currents, continuous measurement should not exceed 15 seconds to prevent damage to the instrument.
5.5 Resistance Measurement (Ω)
- Turn the function knob to the 'Ω' position.
- Insert the red probe into the 'Measure' input socket (VΩHz) and the black probe into the 'COM' socket.
- Contact the probes to the measured circuit or resistance.
- Read the measurement result on the screen.
WARNING: When measuring resistance on a live circuit, disconnect the power supply and discharge all high-voltage capacitors before testing to avoid damage and electric shock.
5.6 Capacitance Measurement (F)
- Turn the function knob to the 'F' position.
- Insert the red probe into the 'Measure' input socket (VΩHz) and the black probe into the 'COM' socket.
- Contact the probes to the capacitor.
- Read the measurement result on the screen.
WARNING: When measuring capacitance on a live circuit, disconnect the power supply and discharge all high-voltage capacitors before testing to avoid damage and electric shock.
5.7 Continuity Measurement
- Turn the function knob to the 'Ω' position and use the 'FUNC' key to switch to Continuity mode.
- Insert the red probe into the 'Measure' input socket (VΩHz) and the black probe into the 'COM' socket.
- Contact the probes to the circuit or component.
- If the resistance is less than 30Ω, the buzzer will sound and the green indicator will light up. If resistance is between 30Ω and 600Ω, the red indicator will light up.
WARNING: When measuring continuity on a live circuit, disconnect the power supply and discharge all high-voltage capacitors before testing to avoid damage and electric shock.
5.8 Diode Measurement
- Turn the function knob to the 'Ω' position and use the 'FUNC' key to switch to Diode mode.
- Insert the red probe into the 'Measure' input socket (VΩHz) and the black probe into the 'COM' socket.
- Touch the diode anode with the red probe and the cathode with the black probe.
- Read the forward voltage value on the screen.
WARNING: When measuring diodes on a live circuit, disconnect the power supply and discharge all high-voltage capacitors before testing to avoid damage and electric shock.
5.9 NCV (Non-Contact Voltage) Test
- Turn the function knob to the 'NCV' position. The display will show 'NCV'.
- Gradually approach the detected point with the top of the multimeter.
- The NCV inductive indicator will light up (green for weak AC signals, red for strong AC signals) and the buzzer will sound with varying frequency (slow beeps for weak signals, fast beeps for strong signals) to indicate voltage presence.
5.10 Temperature Measurement (°C/°F)
- Turn the function knob to the '°C/°F' position.
- Insert the K-type thermocouple's positive (red) into the 'Measure' input socket (VΩHz) and the negative (black) into the 'COM' socket.
- Contact the thermocouple probe to the object being measured.
- Read the temperature result on the display.
WARNING: When measuring temperature with a thermocouple, ensure the probe does not touch any charged objects to avoid damage or electric shock.
5.11 Data Hold, Max Measurement, Backlight, and Flashlight
- Data Hold: Press the 'HOLD' button to freeze the current reading on the display. Press again to release.
- Maximum Measurement: Press the 'MAX' button to capture and display the maximum value measured. Press again to exit.
- Backlight: Short press the 'Light' button to turn the LCD backlight on or off. It will automatically turn off after approximately 30 seconds.
- Flashlight: Press and hold the 'Light' button for more than 2 seconds to turn the flashlight on or off.
5.12 Auto Power Off
The instrument will automatically turn off after 15 minutes of inactivity to save battery energy. To restore operation, press any key. If the 'FUNC' button is pressed when turning on the meter, the auto-shutdown function will be canceled for that session.
6. Specifications
6.1 General Technical Specifications
- Environment Condition: CAT III 600V, Pollution level 2, Altitude < 2000m.
- Working Temperature & Humidity: 0~40°C (<80% RH, <10°C non-condensing).
- Storage Temperature & Humidity: -10~60°C (<70% RH, remove batteries).
- Temperature Coefficient: 0.1 x accuracy/°C (<18°C or >28°C).
- Max. Voltage between Terminals and Earth Ground: 600V.
- Fuse Protection: mA: F600mA/250V fuse; 10A: F10A/250V fuse.
- Sampling Rate: Approximately 3 times/second.
- Display: 6000 counts readout. Automatically displays unit symbols according to the shift of the measurement function.
- Over Range Indication: Displays "OL".
- Low Battery Indication: "" symbol displayed when battery voltage is low.
- Input Polarity Indication: Automatically displays "-".
- Power Requirement: 2 x 1.5V AAA batteries.
- Dimensions: 151mm x 75mm x 46mm.
6.2 Accuracy Specifications
Accuracy applies within one year after calibration. Reference conditions: environment temperature 18°C to 28°C, relative humidity no more than 80%. Accuracy: ± (% reading + word).
| Range | Resolution | Accuracy |
|---|---|---|
| 600mV | 0.1mV | ±(0.5% reading+3) |
| 6V | 0.001V | |
| 60V | 0.01V | |
| 600V | 0.1V |
Input impedance: 10MΩ; Overload protection: 600V; Maximum input voltage: 600V.
| Range | Resolution | Accuracy |
|---|---|---|
| 600mV | 0.1mV | ±(1.0% reading+3) |
| 6V | 0.001V | |
| 60V | 0.01V | |
| 600V | 0.1V |
Input impedance: 10MΩ; Overload protection: 600V; Maximum input voltage: 600V; Frequency Response: 1kHz; TRMS.
| Range | Resolution | Accuracy |
|---|---|---|
| 600µA | 0.1µA | ±(1.2% reading+3) |
| 6000µA | 1µA | |
| 60mA | 0.01mA | |
| 600mA | 0.1mA | |
| 6A | 0.001A | |
| 10A | 0.01A |
Overload protection: µA/mA: F600mA/250V fuse; A: F10A/250V fuse. Maximum input current: mA: 600mA; A: 10A.
| Range | Resolution | Accuracy |
|---|---|---|
| 600µA | 0.1µA | ±(1.5% reading+3) |
| 6000µA | 1µA | |
| 60mA | 0.01mA | |
| 600mA | 0.1mA | |
| 6A | 0.001A | |
| 10A | 0.01A |
Overload protection: µA/mA: F600mA/250V fuse; A: F10A/250V fuse. Maximum input current: mA: 600mA; A: 10A. Frequency Response: 1kHz; TRMS.
| Range | Resolution | Accuracy |
|---|---|---|
| 600Ω | 0.1Ω | ±(1.0% reading+3) |
| 6KΩ | 0.001KΩ | |
| 60KΩ | 0.01KΩ | |
| 600KΩ | 0.1KΩ | |
| 6MΩ | 0.001MΩ | |
| 60MΩ | 0.01MΩ |
Overload protection: 250V.
| Range | Resolution | Accuracy |
|---|---|---|
| 6nF | 0.001nF | ±(4.0% reading+3) |
| 60nF | 0.01nF | |
| 600nF | 0.1nF | |
| 6µF | 0.001µF | |
| 60µF | 0.01µF | |
| 600µF | 0.1µF | |
| 6mF | 0.001mF | |
| 100mF | 0.01mF | ±(5.0% reading+5) |
Overload protection: 250V.
| Range | Resolution | Accuracy |
|---|---|---|
| 10Hz | 0.01Hz | ±(1.0% reading+3) |
| 100Hz | 0.1Hz | |
| 1000Hz | 1Hz | |
| 10kHz | 0.01kHz | |
| 100kHz | 0.1kHz | |
| 1000kHz | 1kHz | |
| 10MHz | 0.01MHz | |
| 1%~99% | 0.1% |
Hz/duty: 1) Range: 0~10MHz; 2) Voltage sensitivity: 0.2~10V AC; 3) Overload protection: 250V. V: 1) Range: 0~100 kHz; 2) Voltage sensitivity: 0.5~600V ACV; µA, mA, A: 1) Range: 0~100 kHz; 2) Voltage sensitivity: ≥ 1/4 Full range; 3) Overload protection: µA/mA: F600mA/250V fuse; A: F10A/250V fuse.
| Function | Description |
|---|---|
| Diode Test | Displays approximate forward voltage value. Forward DC current is about 2.5mA. Reverse DC voltage is about 3V. Overload protection: 250V. |
| Function | Description |
|---|---|
| Continuity Test | Buzzer sounds and green indicator lights up if resistance < 30Ω. Red indicator lights up if resistance is between 30Ω and 600Ω. Open circuit voltage is about 1V. Overload protection: 250V. |
| Range | Resolution | Accuracy |
|---|---|---|
| -20°C~0°C | 1°C | ±5.0% reading or ±3°C |
| 0°C~400°C | ±1.0% reading or ±2°C | |
| 400°C~1000°C | ±2.0% reading or ±4°C | |
| -4°F~32°F | ±5.0% reading or ±6°F | |
| 32°F~752°F | 1°F | ±1.0% reading or ±4°F |
| 752°F~1832°F | ±2.0% reading or ±8°F |
The accuracy does not include the error of the thermocouple probe.
6.3 Model Comparison: KM61C vs. KM61B
The KUAIQU series offers two models, KM61C and KM61B, with slight differences in their capabilities:
| Feature | KM61C | KM61B |
|---|---|---|
| Max. Counts | 6000 | 4000 |
| Resistance | 60MΩ | 40MΩ |
| Capacitance | 100mF | 4mF |
| Frequency/Duty Cycle | 10MHz / 1%~99.9% | Not specified (implied lower range) |
7. Maintenance
7.1 General Care
- Keep the multimeter clean and dry. Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
- Store the instrument in a cool, dry place away from direct sunlight and extreme temperatures.
- If the instrument is not used for a long period, remove the batteries to prevent leakage and damage.
7.2 Battery Replacement
When the low battery indicator appears on the display, replace the batteries promptly to ensure accurate measurements. Refer to Section 4.1 for battery installation instructions.
7.3 Fuse Replacement
If the current measurement function fails, the fuse may need replacement. Ensure the multimeter is OFF and disconnect all test leads before attempting to replace fuses. The fuse specifications are: mA: F600mA/250V; 10A: F10A/250V.
8. Troubleshooting
If you encounter issues with your multimeter, try the following basic troubleshooting steps:
- No Display/Power On: Check battery installation and ensure batteries are not depleted. Replace if necessary.
- Inaccurate Readings: Ensure test leads are properly connected and not damaged. Verify the correct measurement function and range are selected. Check battery level.
- No Continuity Beep: Ensure the continuity function is selected and the circuit is not live.
- NCV Not Detecting: Ensure the NCV function is selected and the multimeter is brought close enough to the AC voltage source.
For persistent issues, consult the full user manual PDF or contact customer support.
9. User Tips
- Always start with the highest range when measuring an unknown value to prevent overloading the meter.
- For precise temperature measurements, allow the thermocouple to stabilize with the environment before taking readings.
- Utilize the 'HOLD' function to capture readings in hard-to-reach or poorly lit areas.
- The 'MAX' function is useful for identifying peak values in fluctuating measurements.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official documentation provided with your product or contact the seller directly. A detailed user manual in PDF format is available for download: View User Manual (PDF).
