KUAIQU SPPS-G Adjustable Laboratory DC Power Supply and KM61C True RMS Digital Multimeter Instruction Manual

1. Introduction

This manual provides detailed instructions for the safe and effective use of your KUAIQU SPPS-G Adjustable Laboratory DC Power Supply and KM61C True RMS Digital Multimeter. These instruments are designed for a wide range of applications, from educational experiments to professional R&D, commissioning, and repair tasks. Please read this manual thoroughly before operation and keep it for future reference.

2. Package Contents

Please check the package carefully upon receipt to ensure all items are present and undamaged:

• 1 * DC power supply
• 1 * Multimeter (KM61C)
• 1 * Multimeter probe
• 1 * Temperature probe
• 1 * Power cord
• 1 * Output cable
• 1 * Output cable (100cm, silicone)
• 1 * Warranty card
• 1 * User Manual
• 1 * Hard Carton

3. Product Overview

3.1. KUAIQU SPPS-G DC Power Supply

The SPPS-G series DC power supply is a high-precision, stable, and continuous output power source featuring low noise and ripple. It incorporates advanced control and safety features for reliable operation.

• Display Screen Protective Film: Protects the display from scratches.
• Voltage Display: Shows the current output voltage.
• Current Display: Shows the current output current.
• Power Display: Shows the current output power.
• Constant Voltage Indicator (C.V): Illuminates when the power supply is operating in constant voltage mode.
• Constant Current Indicator (C.C): Illuminates when the power supply is operating in constant current mode.
• 5V/2A USB Port: Provides a stable 5V/2A output for charging devices.
• Current Adjustment Knob: Adjusts the output current.
• Voltage Adjustment Knob: Adjusts the output voltage.
• Overcurrent Protection (OCP) Button: Activates/deactivates overcurrent protection.
• Overvoltage Protection (OVP) Button: Activates/deactivates overvoltage protection.
• Output Button: Controls the power output to the load.
• Power On/Off: Main power switch.
• Negative Output Port (-): Connects to the negative terminal of the load.
• GND (Ground) Port: Connects to the ground of the load.
• Positive Output Port (+): Connects to the positive terminal of the load.
• Shock Absorber Rubber Feet: Provides stability and reduces vibration.
• Metal Body: Durable enclosure.
• Fuse Box: Contains the main fuse for protection.

Key Features:

• OCP/OVP Button: Allows manual presetting of maximum output current and voltage. If the output exceeds these values, short circuit protection activates to safeguard equipment.
• Stable Output Switch Button: Prevents accidental damage to connected devices by allowing voltage/current adjustments without immediate output.
• Encoder Knobs: Four high-precision encoder knobs for precise adjustment of current and voltage (coarse and fine adjustments). Pressing the knob toggles digits, and rotating sets values (0-9) with resolutions up to 0.01V and 0.001A. A mute function is available by pressing the fine adjustment knob for five seconds.
• Auto Switch C.C/C.V Mode: Automatically switches between constant voltage and constant current modes depending on the load conditions.
• Multiple Protections: Includes over-voltage protection (OVP), over-current protection (OCP), over-heat protection, over-load protection, and termination protection.
• Temperature Control Fan: Automatically activates when the operating temperature exceeds 122°F/50°C for effective heat dissipation and extended equipment life.

3.2. KUAIQU KM61C Digital Multimeter

The KM61C is a versatile True RMS digital multimeter designed for comprehensive electrical measurements, offering high accuracy and user-friendly features.

Key Features:

• 6000 Count: High resolution for precise readings.
• True RMS: Accurate measurements for both sinusoidal and non-sinusoidal AC waveforms.
• DC 600V Voltage: Measures direct current voltage up to 600V.
• AC 600V Voltage: Measures alternating current voltage up to 600V.
• DC AC 10A Current: Measures direct and alternating current up to 10A.
• 60MΩ Resistance: Measures resistance up to 60 megaohms.
• 100mF Capacitance: Measures capacitance up to 100 millifarads.
• 10MHz Frequency: Measures frequency up to 10 megahertz.
• 1%~99% Duty Cycle: Measures the duty cycle of pulsed signals.
• -20°C~1000°C Temperature: Measures temperature using the included probe.
• 1kHz AC Broadband: Ensures accuracy for high-frequency AC signals.
• Auto Range: Automatically selects the optimal measurement range.
• Live Wire Detection: Identifies live electrical wires.
• NCV (Non-Contact Voltage) Detection: Detects AC voltage without physical contact.
• Diode Test: Checks the functionality of diodes.
• Continuity Test: Checks for electrical continuity in circuits.
• MAX Measurement: Records the maximum measured value.
• Data Hold: Freezes the current display reading.
• Low Voltage Indication: Alerts when battery power is low.
• Auto Power Off: Conserves battery life by automatically shutting down after a period of inactivity.
• Built-in Flashlight: Illuminates the work area in dim conditions.

4. Setup

4.1. DC Power Supply Setup

1. Placement: Place the power supply on a stable, level surface with adequate ventilation. Ensure no obstructions block the air vents on the sides and rear.
2. Power Connection: Connect the provided power cord to the AC input socket on the rear panel of the power supply and then to a suitable AC power outlet.
3. Initial Power On: Press the main POWER switch on the front panel. The display should illuminate, showing default voltage and current settings.
4. Load Connection: Before connecting any load, ensure the power supply's OUTPUT button is OFF (indicator light off). Connect the positive (+) terminal of your load to the red output terminal, the negative (-) terminal of your load to the black output terminal, and if necessary, the ground of your load to the green GND terminal. Use the provided output cables.

4.2. Digital Multimeter Setup

1. Battery Installation: Open the battery compartment on the back of the multimeter and insert the required batteries (typically AA or AAA, check the battery cover for specifics) ensuring correct polarity. Close the compartment securely.
2. Test Lead Connection: Insert the red test lead into the 'VΩmA' or '10A' jack (depending on the measurement) and the black test lead into the 'COM' (common) jack. For temperature measurements, connect the temperature probe to the appropriate jacks as indicated on the multimeter.

5. Operation

5.1. Operating the SPPS-G DC Power Supply

1. Power On: Turn on the main POWER switch.
2. Setting Voltage: Rotate the VOLTAGE adjustment knob to set the desired voltage. For fine adjustments, press the knob to select the digit you wish to change, then rotate to adjust its value.
3. Setting Current Limit: Rotate the CURRENT adjustment knob to set the desired current limit. Similar to voltage, press the knob for fine digit-by-digit adjustment.
4. OCP/OVP Function: Press the OCP or OVP button to activate the respective protection. You can then adjust the threshold using the current/voltage knobs. When activated, if the output current/voltage exceeds the set limit, the power supply will cut off output and flash the OCP/OVP indicator.
5. Connecting Load: Ensure the OUTPUT button is OFF before connecting your load. Once the load is securely connected and voltage/current limits are set, press the OUTPUT button to enable power output. The OUTPUT indicator will light up.
6. USB Output: The 5V/2A USB port provides a constant 5V/2A output for charging compatible devices, independent of the main DC output settings.

5.2. Operating the KM61C Digital Multimeter

1. Power On: Rotate the function dial from 'OFF' to the desired measurement function.
2. Selecting Measurement Function: Turn the rotary dial to select Voltage (V~ for AC, V- for DC), Current (A~ for AC, A- for DC), Resistance (Ω), Capacitance (F), Frequency (Hz), Duty Cycle (%), or Temperature (°C/°F).
3. Taking Measurements: Connect the test leads to the circuit or component under test. The multimeter will automatically display the reading (auto-ranging).
4. Special Functions:
   • FUNC Button: Cycles through sub-functions within a dial position (e.g., AC/DC voltage, diode/continuity).
   • HOLD Button: Press to freeze the current reading on the display. Press again to release.
   • MAX Button: Press to display the maximum value measured.
   • NCV/Live Wire: Select the NCV function on the dial. Bring the top of the multimeter near an AC voltage source to detect its presence without contact. For live wire detection, use the single red probe method as indicated in the full manual.
   • Temperature: Connect the temperature probe to the appropriate input jacks and select the temperature function.
5. Auto Power Off: The multimeter will automatically power off after a period of inactivity to save battery. Rotate the dial to 'OFF' and then back to a function to restart.

6. Maintenance

6.1. General Care

• Keep both instruments clean and dry. Wipe surfaces with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Avoid exposing the devices to extreme temperatures, humidity, or direct sunlight.
• Store the instruments in a safe place when not in use, away from dust and potential physical damage.

6.2. Power Supply Maintenance

• Ventilation: Ensure the cooling fan and vents are free from dust and debris to maintain proper airflow and prevent overheating.
• Fuse Replacement: If the power supply fails to power on, check the fuse located in the fuse box on the rear panel. Disconnect the power cord before attempting to replace the fuse. Use only fuses of the specified type and rating.

6.3. Multimeter Maintenance

• Battery Replacement: When the low voltage indicator appears on the display, replace the batteries promptly to ensure accurate readings and proper operation.
• Test Leads: Inspect test leads for any signs of damage (cracks, frayed insulation). Replace damaged leads immediately to prevent electrical shock.

7. Troubleshooting

7.1. DC Power Supply Issues

• No Power: Check the power cord connection and the fuse on the rear panel. Ensure the main power switch is ON.
• No Output: Ensure the OUTPUT button is pressed (indicator light ON). Check if OCP or OVP is active and adjust the limits or disable if not required. Verify load connections.
• OCP/OVP Alarm: This indicates that the output current or voltage has exceeded the preset limit. Reduce the load, increase the current/voltage limit, or disable the protection if appropriate for your application.
• Unstable Output: Ensure connections are secure. Check for proper ventilation to prevent overheating.

7.2. Digital Multimeter Issues

• No Display/Faint Display: Replace the batteries.
• Incorrect Readings: Ensure the correct function is selected on the dial and test leads are connected to the appropriate jacks. Check test leads for damage.
• Continuity/Diode Test Not Working: Ensure the function is correctly selected and probes are making good contact.

8. Specifications

8.1. KUAIQU SPPS-G OCP/OVP Series DC Power Supply

8.2. KUAIQU KM61C Digital Multimeter

• Display: 6000 Counts
• True RMS: Yes
• DC Voltage: Up to 600V
• AC Voltage: Up to 600V
• DC Current: Up to 10A
• AC Current: Up to 10A
• Resistance: Up to 60MΩ
• Capacitance: Up to 100mF
• Frequency: Up to 10MHz
• Duty Cycle: 1%~99%
• Temperature: -20°C~1000°C
• AC Bandwidth: 1kHz
• Ranging: Auto Range
• Special Features: Live Wire Detection, NCV, Diode Test, Continuity Test, MAX Measurement, Data Hold, Low Voltage Indication, Auto Power Off, Flashlight.

9. User Tips

• Always Use the Output Switch: Before connecting or disconnecting a load to the power supply, ensure the OUTPUT button is OFF. This prevents sudden voltage/current surges that could damage your circuit or the power supply.
• Understand OCP/OVP: Utilize the Overcurrent Protection (OCP) and Overvoltage Protection (OVP) features to safeguard your sensitive circuits. Set these limits slightly above your expected operating parameters.
• Fine-Tune with Encoder Knobs: For precise voltage and current settings, use the encoder knobs' digit-by-digit adjustment feature. This allows for very accurate control, especially in sensitive applications.
• Multimeter Auto-Ranging: The KM61C's auto-ranging feature simplifies measurements, but always double-check that you've selected the correct primary function (e.g., Voltage, Current, Resistance) to avoid incorrect readings or potential damage.
• Safety First with Multimeter: When using the multimeter, especially for voltage or current measurements, always ensure the test leads are connected to the correct input jacks and the function dial is set appropriately for the expected range. Use NCV and live wire detection for added safety.

10. Warranty and Support

Your KUAIQU SPPS-G Adjustable Laboratory DC Power Supply and KM61C True RMS Digital Multimeter are covered by a manufacturer's warranty. Please refer to the included Warranty Card for specific terms and conditions, including the warranty period and coverage details.

For technical support, troubleshooting assistance, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt and warranty card handy when seeking support.