KKM828 Digital Oscilloscope Multimeter User Manual

1. Introduction

This manual provides detailed instructions for the safe and effective operation of the SEEIRIR KKM828 Digital Oscilloscope Multimeter. The KKM828 is a versatile 2-in-1 device combining the functionalities of a digital oscilloscope and a multimeter, designed for electronic testing and maintenance. It features a 2.4-inch color screen, 1MHz bandwidth, and a 2.5Msps sampling rate.

Please read this manual thoroughly before using the device to ensure proper handling and to prevent damage or injury.

2. Safety Information

Always adhere to the following safety precautions to prevent electric shock, fire, or damage to the device.

• Do not exceed the maximum input ratings for any function. The device is rated CAT II 1000V.
• Ensure the test leads are in good condition and properly connected before making any measurements.
• Do not use the device if it appears damaged or is operating abnormally.
• Avoid using the device in wet environments or near explosive gases or dust.
• Always turn off the circuit power and discharge high-voltage capacitors before measuring resistance, continuity, diodes, or capacitance.
• Replace the battery only with the specified type and ensure correct polarity.
• Refer to the fuse ratings for current measurement inputs (MAX 10A FUSE, MAX 400mA FUSE).

3. Product Overview

The KKM828 integrates a digital oscilloscope and a full-featured multimeter into a compact, portable design. Below is an overview of its main components and controls.

Figure 3.1: KKM828 Device and Accessories. This image displays the KKM828 Digital Oscilloscope Multimeter along with its included test leads. The device features a central rotary dial, function buttons (F1-F4, R, S), and input jacks for current and voltage measurements. The screen shows an example oscilloscope waveform.

3.1. Front Panel Controls and Display

• Display (2.4-inch Color Screen): Shows oscilloscope waveforms, multimeter readings, and menu options. Resolution: 320*240 Pixels.
• Rotary Dial: Selects measurement functions (Voltage, Resistance, Capacitance, Frequency, Current, Oscilloscope mode).
• Function Buttons (F1-F4): Context-sensitive buttons for menu navigation and setting adjustments in oscilloscope mode.
• R Button: Likely for Range or Reset.
• S Button: Likely for Save or Setup.
• Input Jacks:
  • 10A: Input for high current measurements (up to 10A).
  • mAmF VΩCap: Common input for milliampere, microampere, millifarad, voltage, resistance, and capacitance measurements.
  • COM: Common (negative) input for all measurements.

4. Setup

4.1. Battery Installation

The KKM828 is powered by a demountable battery. Ensure the battery is properly installed before first use.

1. Locate the battery compartment on the back of the device.
2. Open the battery compartment cover.
3. Insert the battery, observing correct polarity (+ and -).
4. Close the battery compartment cover securely.

4.2. Connecting Test Leads

Proper connection of test leads is crucial for accurate and safe measurements.

• For most voltage, resistance, capacitance, and frequency measurements, connect the black test lead to the COM jack and the red test lead to the mAmF VΩCap jack.
• For high current measurements (up to 10A), connect the red test lead to the 10A jack and the black test lead to the COM jack.
• For lower current measurements (up to 400mA), connect the red test lead to the mAmF VΩCap jack and the black test lead to the COM jack.

5. Operating Instructions

5.1. Powering On/Off

Turn the rotary dial from the "OFF" position to any measurement function to power on the device. To power off, turn the rotary dial back to the "OFF" position.

5.2. Multimeter Functions

Select the desired measurement function using the central rotary dial.

• Voltage Measurement (V, mV): Turn the dial to V or mV. Connect test leads in parallel with the circuit or component.
• Resistance Measurement (Ω): Turn the dial to Ω. Ensure the circuit is de-energized. Connect test leads across the component.
• Capacitance Measurement (mF, µF, nF): Turn the dial to mF. Ensure the capacitor is discharged. Connect test leads across the capacitor.
• Frequency/Duty Cycle Measurement (Hz%): Turn the dial to Hz%. Connect test leads to the signal source.
• Current Measurement (A, mA): Turn the dial to 10A or mA. Connect the meter in series with the circuit. Always ensure the correct input jack is used for the expected current range.

5.3. Oscilloscope Function

To enter oscilloscope mode, turn the rotary dial to the "Graphical" or "Oscilloscope" position (indicated by the waveform symbol).

• Connecting the Probe: Connect the oscilloscope probe to the appropriate input jack (usually the VΩCap jack for signal input).
• Adjusting Settings: Use the F1-F4 buttons to navigate and adjust oscilloscope parameters such as:
  • Time Base (M:500uS): Adjusts the horizontal scale (time per division).
  • Vertical Scale (CH:3.0V): Adjusts the vertical scale (volts per division).
  • Trigger Mode (Auto Trig): Sets how the waveform is stabilized on the screen.
  • Measurement Parameters: The display shows automatic measurements like Peak-to-Peak Voltage (VP-P), Average Voltage (Vavg), RMS Voltage (Vrms), and Frequency (kHz).
• Automatic Measurement: The device provides one-click reading of frequency, voltage, and duty cycle in oscilloscope mode.

5.4. USB Storage

The KKM828 supports waveform data export via USB. This feature allows for easy analysis of captured waveforms on a computer.

• Connect the device to a computer using a compatible USB cable (not explicitly mentioned if included, assume standard micro-USB or USB-C).
• Follow on-screen prompts or refer to specific software instructions (if applicable) for data transfer.

6. Maintenance

6.1. Cleaning

To maintain the device's appearance and functionality:

• Wipe the casing with a damp cloth and mild detergent. Do not use abrasives or solvents.
• Ensure the device is powered off and disconnected from any circuits before cleaning.

6.2. Battery Replacement

Replace the battery when the low battery indicator appears on the display. Refer to Section 4.1 for battery installation steps.

6.3. Fuse Replacement

If the current measurement function fails, the fuse may need replacement. Refer to the device's internal markings for fuse specifications (MAX 10A FUSE, MAX 400mA FUSE) and consult a qualified technician if unsure.

7. Troubleshooting

8. Specifications

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact SEEIRIR customer service through the retailer where the product was purchased or refer to the official SEEIRIR website for contact details.

Please retain your purchase receipt as proof of purchase for warranty claims.