ANENG SZ202 Digital Multimeter Instruction Manual

Introduction

The ANENG SZ202 is a smart digital multimeter designed for precise and versatile electrical measurements. Featuring a 4000-count display, it is an ideal tool for electricians, hobbyists, and professionals for tasks such as experimental debugging, electric box maintenance, DIY learning, and automotive inspection. This manual provides essential information for safe and effective use of your multimeter.

Figure 1: ANENG SZ202 Smart Digital Multimeter

Safety Information

Always read and understand all safety instructions before operating the multimeter. Failure to follow these warnings could result in serious injury or damage to the instrument.

• Do not touch the probes directly with your hands to avoid electric shock and ensure personal safety during testing.
• Before use, inspect the test probes to ensure there is no damaged insulation or exposed metal. Replace damaged test leads immediately.
• Do not use the current and voltage ranges interchangeably without understanding the circuit. Incorrect range selection can prevent damage to the instrument.
• Never measure voltage with the test leads connected to the current input jacks (10A or mA). This can severely damage the multimeter and pose a safety risk.
• If you do not know the magnitude of the voltage or current to be measured, start with the highest range and then select the appropriate range based on the measured value.
• Ensure the multimeter's CAT rating is appropriate for the circuit you are testing.
• Do not operate the multimeter if it appears damaged or is not functioning properly.

Package Contents

Verify that all items are present in your package:

• 1 x ANENG SZ202 Digital Multimeter
• 1 x Test Pen Line (Test Leads)
• 1 x User Manual
• 1 x Packing Box
• Optional: 1 x 16-in-one combination line (if selected at purchase)

Figure 2: Included Accessories

Product Overview

Familiarize yourself with the components and functions of your ANENG SZ202 Digital Multimeter.

Figure 3: Multimeter Panel and Dimensions

1. Indicator Light: Provides visual feedback for certain functions.
2. Digital Display Bright Screen: High-definition display for clear readings, even in dim environments.
3. Data Hold Key (H): Press to freeze the current reading on the display.
4. Relative Value Measurement Switch Key (REL): Used for relative measurements.
5. Function Switch Key (SET): Cycles through sub-functions within a main rotary switch position (e.g., AC/DC, Diode/Continuity).
6. Shutdown (OFF Position): Turns the multimeter off.
7. AC/DC Voltage (V~): Measures both alternating and direct current voltage.
8. Resistance/Diode/On/Off (Ω/Diode/Continuity): Measures resistance, tests diodes, and checks for circuit continuity.
9. Capacitor (nF/µF): Measures capacitance.
10. NCV (Non-Contact Voltage): Detects AC voltage without direct contact.
11. mA AC/DC Current (mA~): Measures small alternating and direct currents.
12. AC/DC Current (A~): Measures larger alternating and direct currents (up to 10A).
13. Function Turntable (Rotary Switch): Selects the primary measurement function.
14. Current 10A Red Gauge Pen Positive Jack Input (10A): Input for measuring currents up to 10A.
15. Red Gauge Pen Positive Input (INPUT): Input for voltage, resistance, capacitance, diode, and continuity measurements.
16. Black Watch Pen Negative Jack Input (COM): Common (negative) input for all measurements.

Specifications

The following table details the functions, ranges, resolutions, and precision of the ANENG SZ202 Digital Multimeter.

Figure 4: Function and Range Specifications

Setup

Battery Installation

The ANENG SZ202 multimeter requires two 1.5V AAA batteries (not included). To install or replace batteries:

1. Ensure the multimeter is turned OFF.
2. Locate the battery compartment on the back of the device.
3. Open the battery cover.
4. Insert two AAA batteries, observing the correct polarity (+ and -) as indicated inside the compartment.
5. Close the battery cover securely.

Figure 5: Battery Compartment

Operating Instructions

General Operation

• Power On/Off: Rotate the function turntable from the 'OFF' position to any desired measurement function to turn on the multimeter. Rotate back to 'OFF' to power off.
• Auto Power Off: The instrument will automatically shut down after approximately 15 minutes of no operation to conserve battery life.
• Data Hold: Press the 'H' button to freeze the current reading on the display. Press 'H' again to release.
• Function Selection: Use the rotary switch to select the main measurement function. For functions with multiple modes (e.g., AC/DC voltage, Diode/Continuity), press the 'SET' button to cycle through them.

Measurement Functions

Always ensure the test leads are correctly inserted into the appropriate jacks for the desired measurement.

1. DC Voltage Measurement (V–)

To measure DC voltage, such as battery voltage:

1. Set the rotary switch to the 'V~' position.
2. If necessary, press the 'SET' button to ensure DC voltage mode is selected (indicated by 'DC' on the display).
3. Insert the red test lead into the 'INPUT' jack and the black test lead into the 'COM' jack.
4. Connect the test probes across the component or circuit to be measured. The display will show the voltage value. The multimeter can easily detect battery voltage and determine positive and negative electrodes; the red probe will display a '-' symbol when touching the negative electrode.

Figure 6: DC Voltage Measurement Example

2. AC Voltage Measurement (V~)

To measure AC voltage:

1. Set the rotary switch to the 'V~' position.
2. Press the 'SET' button to ensure AC voltage mode is selected (indicated by 'AC' on the display).
3. Insert the red test lead into the 'INPUT' jack and the black test lead into the 'COM' jack.
4. Connect the test probes across the AC source or component.

Figure 7: AC Voltage Measurement Example

3. Current Measurement (mA~ / A~)

IMPORTANT: Current measurements must always be performed in series with the circuit. Never connect the multimeter in parallel when measuring current, as this will short the circuit and damage the instrument.

1. Determine if you need to measure mA (milliamperes) or A (amperes) and select the corresponding position on the rotary switch ('mA~' or 'A~').
2. For mA measurements, insert the red test lead into the 'INPUT' jack. For A measurements (up to 10A), insert the red test lead into the '10A' jack. Always insert the black test lead into the 'COM' jack.
3. Open the circuit where you want to measure current.
4. Connect the multimeter in series with the circuit, so that the current flows through the multimeter.
5. If measuring AC current, press the 'SET' button to select AC mode.

Figure 8: Correct (Series) vs. Incorrect (Parallel) Current Measurement

Figure 9: Correct Current Measurement Setup

4. Resistance Measurement (Ω)

To measure resistance:

1. Set the rotary switch to the 'Ω/Diode/Continuity' position.
2. Press the 'SET' button to select resistance mode (indicated by 'Ω' on the display).
3. Insert the red test lead into the 'INPUT' jack and the black test lead into the 'COM' jack.
4. Connect the test probes across the resistor or component. Ensure the component is de-energized before measuring.

Figure 10: Resistance Measurement Example

5. Capacitance Measurement (nF/µF)

To measure capacitance:

1. Set the rotary switch to the 'Capacitor' position.
2. Insert the red test lead into the 'INPUT' jack and the black test lead into the 'COM' jack.
3. Important: Always discharge capacitors before measuring to prevent damage to the multimeter or injury.
4. Connect the test probes across the capacitor.

Figure 11: Capacitance Measurement Example

6. Diode Test

To test a diode:

1. Set the rotary switch to the 'Ω/Diode/Continuity' position.
2. Press the 'SET' button to select diode test mode (indicated by a diode symbol on the display).
3. Insert the red test lead into the 'INPUT' jack and the black test lead into the 'COM' jack.
4. Connect the red probe to the anode and the black probe to the cathode of the diode. A forward voltage drop will be displayed. Reverse the probes; the display should show 'OL' (Open Line) for a good diode.

Figure 12: Diode Test Example

7. Continuity Test (On-off Beep)

To check for circuit continuity:

1. Set the rotary switch to the 'Ω/Diode/Continuity' position.
2. Press the 'SET' button to select continuity mode (indicated by a buzzer symbol on the display).
3. Insert the red test lead into the 'INPUT' jack and the black test lead into the 'COM' jack.
4. Connect the test probes across the circuit or component. If there is continuity (low resistance), the multimeter will emit an audible beep. This is useful for checking fuses or wire breaks.

Figure 13: Continuity Test Example

8. Non-Contact Voltage (NCV) Detection

To detect AC voltage without direct contact:

1. Set the rotary switch to the 'NCV' position.
2. Bring the top of the multimeter near an AC voltage source (e.g., a live wire or outlet).
3. If AC voltage is detected, the display will show 'EF' (Electric Field), the indicator light will flash, and the buzzer will sound.

Figure 14: NCV Detection Example

Maintenance

Cleaning

To clean the multimeter, wipe the case with a soft, damp cloth. Do not use abrasives or solvents, as these can damage the casing or display. Ensure the device is off and disconnected from any circuits before cleaning.

Storage

When not in use for extended periods, it is best to remove the batteries to prevent potential leakage and corrosion of internal components. Store the multimeter in a cool, dry place, away from direct sunlight and extreme temperatures.

Troubleshooting

If you encounter issues with your ANENG SZ202 multimeter, consider the following:

• No Display/Faint Display: Check the batteries. Replace them if they are low or depleted. Ensure they are installed with correct polarity.
• Incorrect Readings: Verify that the correct function and range are selected for your measurement. Ensure test leads are properly connected to the correct input jacks and making good contact with the circuit.
• Multimeter Not Operating Properly: If there is any problem during the use of the product, please provide a detailed video of the product not operating normally to ANENG customer service. Our experts and technicians can quickly find out the product problem and provide you with a solution.
• Damage from Improper Use: This brand is mostly used to detect electrical and other measurement products. It requires a certain degree of electrical knowledge. Pay attention to the use of certain operating procedures, select the correct measurement method, and avoid dangerous events. If the customer uses the product improperly and the use method is not equal, resulting in damage to the product, it will be judged as man-made damage, which is not within the scope of after-sales service of the product.

User Tips

• Start High, Go Low: When measuring an unknown voltage or current, always start with the highest range setting to prevent overloading the multimeter, then gradually decrease the range if needed for a more precise reading.
• Proper Probe Connection: Double-check that your test leads are in the correct input jacks for the measurement you intend to make (e.g., 'INPUT' for voltage/resistance, '10A' or 'mA' for current).
• Use Data Hold: For fluctuating readings or when working in awkward positions, press the 'H' button to hold the stable reading on the display for easier recording.
• Extension Bracket: Utilize the built-in extension bracket on the back of the multimeter to prop it up on a workbench, allowing for hands-free viewing of the display.
• Discharge Capacitors: Always ensure capacitors are fully discharged before attempting to measure their capacitance or resistance to avoid damage to the meter or personal injury.

Warranty and Support

For after-sales questions or support regarding your ANENG SZ202 Digital Multimeter, please contact ANENG customer service. If you experience quality problems not caused by 'man-made damage' during use, replacement services or refunds may be provided. For specific product issues, please contact ANENG customer service to confirm and discuss solutions.

Figure 15: ANENG After-Sales Service Information