VEVOR Digital Multimeter SS101 User Manual

1. Introduction

Thank you for choosing the VEVOR Digital Multimeter SS101. This device is designed for safe and accurate electrical measurements, suitable for both home DIYers and professional applications. Please read this manual thoroughly before use to ensure proper operation and safety.

1.1 Safety Precautions

• Always adhere to local and national safety codes.
• Ensure the multimeter is set to the correct function and range before making measurements.
• Do not exceed the maximum input values for any function.
• Exercise extreme caution when working with live circuits.
• The device complies with CAT II 600V safety standard, ensuring safe operation in high-voltage conditions.
• The housing is made of sturdy plastic with an IP20 protection rating.
• Replace batteries and fuses only with specified types.

2. Package Contents

Verify that all items listed below are included in your package:

• 1 x VEVOR Digital Multimeter SS101
• 2 x Test Leads (Red and Black)
• 1 x Temperature Probe
• 1 x 9V Battery
• 1 x User Manual

Figure 2.1: VEVOR Digital Multimeter SS101 and its accessories.

3. Product Overview

3.1 Front Panel Layout

Figure 3.1: Front Panel Layout of the Multimeter.

• Rotary Switch: Selects the desired measurement function.
• SELECT Button: Toggles between different modes within a function (e.g., AC/DC).
• RANGE Button: Switches between auto-ranging and manual ranging.
• REL Button: Activates relative measurement mode.
• MAX/MIN Button: Records maximum and minimum values.
• HOLD Button: Freezes the current display reading.
• Light Button: Activates/deactivates the display backlight.
• Input Jack (VΩmA): For voltage, resistance, capacitance, frequency, temperature, diode, and continuity measurements.
• COM Jack: Common (negative) input for all measurements.
• 10A Jack: For high current (up to 10A) measurements.

3.2 Display Features

Figure 3.2: Backlit LCD Display.

• 4000-Count LCD: Provides clear digital readings.
• Backlight: Enhances visibility in low-light conditions.
• Auto-Ranging Indicator: Displays 'AUTO' when auto-ranging is active.
• TRMS Indicator: Shows 'TRMS' for True RMS measurements.
• Negative Polarity Indication: Automatically displays '-' for negative readings.
• Over Range Indication: Displays 'OL' when the measured value exceeds the selected range.
• Battery Indicator: Shows remaining battery life.

4. Setup

4.1 Battery Installation

The multimeter requires one 9V battery (included). To install or replace the battery:

1. Ensure the multimeter is OFF and test leads are disconnected.
2. Locate the battery compartment cover on the back of the unit.
3. Use a screwdriver to remove the screw securing the cover.
4. Remove the cover and insert the 9V battery, observing correct polarity.
5. Replace the cover and secure it with the screw.

4.2 Connecting Test Leads

Always connect the test leads correctly for accurate and safe measurements:

• Connect the black test lead to the COM (common) input jack.
• For most measurements (voltage, resistance, capacitance, frequency, temperature, diode, continuity), connect the red test lead to the VΩmA input jack.
• For high current measurements (up to 10A), connect the red test lead to the 10A input jack.

5. Operating Modes

Turn the rotary switch to the desired function. Use the SELECT button to toggle between modes (e.g., AC/DC) if applicable.

5.1 Voltage Measurement (DC/AC)

To measure voltage:

1. Set the rotary switch to the 'V' (Voltage) position.
2. Use the SELECT button to choose between DC (V-) or AC (V~) voltage.
3. Connect the test leads in parallel to the circuit or component being measured.

5.2 Current Measurement (DC/AC)

To measure current:

1. Set the rotary switch to the 'A' (Current) position.
2. Use the SELECT button to choose between DC (A-) or AC (A~) current.
3. Connect the test leads in series with the circuit. Ensure the circuit is open before connecting the meter.

5.3 Resistance Measurement

To measure resistance:

1. Set the rotary switch to the 'Ω' (Resistance) position.
2. Ensure the circuit or component is de-energized before measuring.
3. Connect the test leads across the component.

5.4 Capacitance Measurement

To measure capacitance:

1. Set the rotary switch to the 'F' (Capacitance) position.
2. Ensure the capacitor is fully discharged before measuring.
3. Connect the test leads across the capacitor.

5.5 Frequency Measurement

To measure frequency:

1. Set the rotary switch to the 'Hz' (Frequency) position.
2. Connect the test leads to the signal source.

5.6 Temperature Measurement

To measure temperature:

1. Set the rotary switch to the '°C/°F' (Temperature) position.
2. Connect the temperature probe to the input jacks.
3. Place the probe tip on the object or in the environment to be measured.

5.7 Diode Test

To perform a diode test:

1. Set the rotary switch to the 'Diode' symbol position.
2. Connect the red test lead to the anode and the black test lead to the cathode of the diode.
3. Reverse the leads to check for reverse bias.

5.8 Continuity Test

To perform a continuity test:

1. Set the rotary switch to the 'Continuity' symbol position.
2. Connect the test leads across the circuit or component. A continuous beep indicates continuity.

5.9 Duty Cycle Measurement

To measure duty cycle:

1. Set the rotary switch to the '%' (Duty Cycle) position.
2. Connect the test leads to the signal source.

6. Special Features

6.1 Auto-Ranging

Figure 6.1: Auto-Ranging Function.

The multimeter automatically selects the appropriate measurement range, simplifying operation. You can switch to manual ranging using the RANGE button if needed.

6.2 True RMS (TRMS)

The TRMS function allows for accurate measurement of the true RMS value of non-sinusoidal waveforms (e.g., square waves, sawtooth waves, inverter outputs), providing more precise readings than traditional multimeters.

6.3 Data Hold

Press the HOLD button to freeze the current reading on the display. Press it again to release.

6.4 MAX/MIN Value Recording

Press the MAX/MIN button to enter recording mode. The meter will display the maximum and minimum values measured since activation. Press again to cycle through MAX, MIN, and current readings.

6.5 Automatic Negative Polarity Indication

The display automatically shows a '-' symbol for negative DC measurements, preventing wiring mistakes.

6.6 Over Range Indication

If the measured value exceeds the selected range, the display will show 'OL' (Over Load) to protect the device from damage.

6.7 15-Minute Auto Shut-Off

To conserve battery life, the multimeter automatically powers off after 15 minutes of inactivity. Press any button or turn the rotary switch to reactivate.

6.8 Backlight

Press the Light button to turn the display backlight ON or OFF for improved visibility in dark environments.

7. Maintenance

7.1 Cleaning

Wipe the device with a dry, soft cloth. Do not use abrasives or solvents.

7.2 Battery Replacement

When the battery indicator shows low power, replace the 9V battery as described in Section 4.1.

7.3 Fuse Replacement

If the current measurement function fails, the fuse may need replacement. Refer to the specifications for the correct fuse type and consult a qualified technician if unsure.

8. Troubleshooting

• No Display: Check battery installation and power. Replace battery if low.
• 'OL' Indication: The measured value exceeds the selected range. Switch to a higher range or check for proper connection.
• Inaccurate Readings: Ensure test leads are correctly connected and making good contact. Verify the correct function and range are selected. Check battery level.
• No Current Measurement: Check the fuse. Replace if blown.

9. Specifications

10. Warranty and Support

VEVOR products are designed for durability and performance. For warranty information or technical support, please refer to the warranty card included with your product or visit the official VEVOR website. Keep your purchase receipt for warranty claims.