1. Introduction
Thank you for choosing the TESMEN TSM-522S Smart Multimeter and TWS-322 Wire Stripper Bundle. This comprehensive kit provides essential tools for electrical testing and wire handling, designed for both professional electricians and DIY enthusiasts. The TSM-522S Smart Multimeter offers intelligent and precise measurements for various electrical parameters, while the TWS-322 Wire Stripper ensures efficient and safe wire preparation. To ensure safe and optimal performance, please read this manual thoroughly before using the products and retain it for future reference.

Image 1.1: The TESMEN TSM-522S Smart Multimeter and TWS-322 Wire Stripper Bundle.
2. Safety Information
Your safety is paramount. Always adhere to the following safety precautions when using electrical testing equipment.
General Safety Guidelines:
- Always inspect the tools, test leads, and accessories for damage before use. Do not use if any part is damaged.
- Do not exceed the maximum input values specified for each measurement function.
- Exercise extreme caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
- Keep fingers behind the finger guards on the test probes during measurements.
- Ensure the battery compartment is securely closed before operation.
- Do not operate the tools in explosive atmospheres or in the presence of flammable gases or dust.
- Always disconnect power to the circuit before stripping or cutting wires, unless using the non-contact voltage detection feature to confirm absence of voltage.
TSM-522S Multimeter Specific Safety:
- The TSM-522S is rated for CAT III 600V. Adhere to this rating and do not use it for measurements exceeding this category or voltage.
- Never apply voltage to the input terminals when the function switch is set to Resistance, Capacitance, Diode, or Continuity mode.
- Ensure the correct function and range are selected before making a measurement.
TWS-322 Wire Stripper Specific Safety:
- Always confirm the absence of voltage using the integrated NCV function or the TSM-522S Multimeter before stripping or cutting live wires.
- Wear appropriate personal protective equipment, such as safety glasses, when using the wire stripper.
3. Product Overview
3.1 TESMEN TSM-522S Smart Multimeter
The TSM-522S is a smart digital multimeter designed for accurate and versatile electrical measurements. It features both automatic and manual measurement modes, a clear backlit display, and additional functionalities for enhanced usability.
- Measurement Functions: AC/DC Voltage, Capacitance, Resistance, Continuity, NCV (Non-Contact Voltage), Live Wire Detection, Frequency, Diode Test.
- Display: 2.56-inch Color Smart Screen with backlight, 4000 counts.
- Convenience Features: Flashlight, Data Hold, Auto Shut-off.
- Safety Rating: CAT III 600V.

Image 3.1: Key measurement functions of the TSM-522S Smart Multimeter.

Image 3.2: The 2.56-inch color smart screen of the TSM-522S Multimeter.
3.2 TESMEN TWS-322 Wire Stripper
The TWS-322 is a multi-functional wire stripper designed for efficient and precise wire preparation. Its self-adjusting mechanism simplifies operation, and it integrates several tools into one compact design.
- Adaptive Stripping: Automatically adjusts for 10 to 24 AWG (0.2-6mm²) wires.
- 4-in-1 Functionality: Wire stripping, wire cutting, terminal crimping, and non-contact voltage detection.
- Ergonomic Design: Comfortable handle for reduced fatigue.
4. Setup
4.1 TSM-522S Smart Multimeter Battery Installation
The TSM-522S Multimeter requires batteries for operation. Batteries are included in the package.
- Locate the battery compartment cover on the back of the multimeter.
- Use a screwdriver to open the battery compartment.
- Insert the batteries, ensuring correct polarity (+ and -).
- Replace the battery compartment cover and secure it with the screw.
4.2 TSM-522S Multimeter Test Lead Connection
Connect the included test leads to the multimeter before use.
- Insert the black test lead into the 'COM' (Common) input jack.
- Insert the red test lead into the 'INPUT' jack for most measurements (Voltage, Resistance, Capacitance, Frequency, Diode, Continuity).
4.3 TWS-322 Wire Stripper
The TWS-322 Wire Stripper is ready for use out of the box. No assembly or battery installation is required for its primary functions.
5. Operating Instructions
5.1 TSM-522S Smart Multimeter Operation
The TSM-522S features a smart mode that automatically identifies measurement types, as well as manual modes for specific functions.
Power On/Off:
- Press the Power button (U) to turn the multimeter on.
- Press and hold the Power button to turn it off. The device also features an auto shut-off function to conserve battery.
Function Selection:
- Upon powering on, the multimeter typically defaults to Smart Mode, which automatically detects AC/DC voltage, resistance, and continuity.
- Press the FUNC button to cycle through specific measurement modes (e.g., AC Voltage, DC Voltage, Resistance, Capacitance, Diode, Continuity, Frequency).
Common Measurements:
- AC/DC Voltage Measurement:
a. Ensure the multimeter is in the appropriate voltage mode (AC V or DC V, or Smart Mode).
b. Connect the red test lead to the positive (+) side of the circuit and the black test lead to the negative (-) side or ground.
c. Read the voltage value on the display.
Image 5.1: Measuring AC voltage from a wall outlet and DC voltage from a car battery using the TSM-522S Multimeter.
- Resistance Measurement:
a. Ensure the circuit is de-energized before measuring resistance.
b. Select Resistance mode (Ω).
c. Connect the test leads across the component or circuit to be measured.
d. Read the resistance value. - Capacitance Measurement:
a. Ensure the capacitor is fully discharged before measurement.
b. Select Capacitance mode.
c. Connect the test leads across the capacitor terminals.
d. Read the capacitance value. - Continuity Test:
a. Ensure the circuit is de-energized.
b. Select Continuity mode. The multimeter will emit an audible beep if continuity is detected (low resistance).
c. Connect the test leads across the circuit or component. - NCV (Non-Contact Voltage) Detection:
a. Select NCV mode.
b. Place the top of the multimeter (NCV sensing area) near the conductor or outlet.
c. The multimeter will indicate the presence of AC voltage through visual and/or audible alerts.
Image 5.2: Using the TSM-522S Multimeter for Non-Contact Voltage (NCV) detection.
- Live Wire Detection:
a. Select Live mode.
b. Use the red test lead to touch the suspected live wire. The multimeter will indicate if the wire is live.
Additional Features:
- Flashlight: Press the Flashlight button (usually a light bulb icon) to turn the built-in flashlight on or off.
- Data Hold: Press the Hold button (H) to freeze the current reading on the display. Press again to release.
5.2 TWS-322 Wire Stripper Operation
The TWS-322 Wire Stripper is designed for ease of use with its self-adjusting mechanism.
Safety First:
Before any wire manipulation, always confirm the absence of electricity. Use the TSM-522S Multimeter or the TWS-322's integrated NCV function.

Image 5.3: Always test for electricity before stripping wires.
Non-Contact Voltage Detection (TWS-322):
The TWS-322 includes a basic NCV function for quick voltage checks.
- Locate the NCV sensor area on the wire stripper (usually near the pivot point).
- Place the sensor near the wire or electrical component.
- An audible and/or visual alarm (e.g., red LED) will indicate the presence of AC voltage.

Image 5.4: Quickly detect the presence of voltage using the TWS-322's NCV function.

Image 5.5: The TWS-322 provides audible and visual alarms for voltage detection.
Wire Stripping (10-24 AWG):
The self-adjusting mechanism eliminates the need to select specific stripping holes.
- Open the stripper handles.
- Insert the wire into the stripping jaws, ensuring the insulation is positioned correctly.
- Squeeze the handles firmly and smoothly. The stripper will automatically grip, cut, and remove the insulation.

Image 5.6: The TWS-322 Wire Stripper's self-adjusting mechanism for 10-24 AWG wires.
Wire Cutting:
Use the integrated cutting blades for clean wire cuts.
- Position the wire in the cutting section of the stripper.
- Squeeze the handles firmly to cut the wire.
Terminal Crimping:
The TWS-322 includes crimping jaws for various terminal types.
- Select the appropriate crimping slot for your terminal size.
- Insert the terminal and the stripped wire into the slot.
- Squeeze the handles firmly to crimp the terminal onto the wire.
6. Maintenance
6.1 Cleaning
- Wipe the tools with a damp cloth and mild detergent. Do not use abrasive cleaners or solvents.
- Ensure the tools are completely dry before storage or next use.
- For the wire stripper, occasionally apply a small amount of light machine oil to the pivot points to ensure smooth operation.
6.2 TSM-522S Battery Replacement
When the battery indicator on the display shows low power, replace the batteries promptly.
- Turn off the multimeter and disconnect all test leads from any circuits.
- Open the battery compartment as described in Section 4.1.
- Remove the old batteries and dispose of them according to local regulations.
- Insert new batteries of the correct type and polarity.
- Securely close the battery compartment.
6.3 Storage
- Store the tools in a cool, dry place, away from direct sunlight and extreme temperatures.
- If storing for an extended period, remove the batteries from the TSM-522S Multimeter to prevent leakage.
- Use the provided storage bag to protect the tools from dust and damage.
7. Troubleshooting
If you encounter issues with your TESMEN tools, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| TSM-522S does not power on. | Dead or incorrectly installed batteries. | Check battery installation; replace batteries if necessary. |
| Inaccurate readings on TSM-522S. | Incorrect function selected; poor test lead connection; exceeding measurement range. | Ensure correct function/mode; check test lead connections; verify measurement is within specified range. |
| TWS-322 not stripping cleanly. | Dull blades; incorrect wire gauge; insufficient pressure. | Ensure wire is within 10-24 AWG range; apply firm, consistent pressure; inspect blades for damage. |
| TWS-322 NCV not detecting voltage. | No voltage present; sensor not close enough to conductor. | Confirm voltage with TSM-522S; ensure sensor is directly over the live conductor. |
8. Specifications
8.1 TESMEN TSM-522S Smart Multimeter
| Feature | Specification |
|---|---|
| Measurement Type | Smart Multimeter |
| Power Source | Battery Powered |
| Display | 2.56-inch Color Smart Screen, Backlit, 4000 Counts |
| Safety Rating | CAT III 600V |
| Functions | AC/DC Voltage, Capacitance, Resistance, Continuity, NCV, Live Wire, Frequency, Diode Test |
| Additional Features | Auto-Ranging, Flashlight, Data Hold, Auto Shut-off |
| Color | Green |
8.2 TESMEN TWS-322 Wire Stripper
| Feature | Specification |
|---|---|
| Tool Type | 4-in-1 Wire Stripper |
| Stripping Range | 10-24 AWG (0.2-6mm²) |
| Functions | Wire Stripping, Wire Cutting, Terminal Crimping, Non-Contact Voltage Detection |
| Color | Green/Black |
9. Warranty and Support
9.1 Warranty Information
TESMEN products are manufactured to high-quality standards. For specific warranty details, please refer to the warranty card included with your product or visit the official TESMEN website. The warranty typically covers defects in materials and workmanship under normal use.
9.2 Customer Support
If you have any questions, require technical assistance, or need to report an issue, please contact TESMEN customer support. Contact information can usually be found on the product packaging, the official TESMEN website, or through your retailer.
