1. Introduction
This user manual provides detailed instructions for the safe and effective operation of your TESMEN TSM-522S Smart Multimeter and TSM-192 Handheld Multimeter bundle. This kit is designed to provide a comprehensive range of measurement functions for various electrical testing needs, from basic diagnostics to complex system maintenance.

Figure 1: TESMEN TSM-522S and TSM-192 Multimeter Bundle. The image displays both multimeters, highlighting their compact and robust design, ready for various electrical measurements.
2. Safety Information
WARNING: To avoid possible electric shock, fire, or personal injury, please read all safety information before using the product.
- Always adhere to local and national safety codes.
- Do not use the meter if it is damaged or operating abnormally. Inspect the meter before use.
- Do not apply more than the rated voltage, as marked on the meter, between the terminals or between any terminal and earth ground.
- Use caution with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
- Use the correct terminals, function, and range for your measurements.
- Do not use the meter around explosive gas, vapor, or in damp or wet environments.
- Before measuring current, ensure the circuit power is off and the circuit is de-energized.
- Always disconnect the test leads from the circuit before changing functions.
- Replace the battery as soon as the low battery indicator appears to avoid incorrect readings.
3. Product Features
The TESMEN TSM-522S and TSM-192 multimeters offer a robust set of features designed for versatility and ease of use:
- Comprehensive Measurement Capabilities: Measures AC/DC Voltage, Capacitance, Resistance, Frequency, Non-Contact Voltage (NCV), Phase Detection, Continuity, Diode, and Live Wire Detection.
- Smart and Manual Modes: The TSM-192 features an intelligent measurement mode for quick field diagnostics, while the TSM-522S supports switching between intelligent and manual modes for greater flexibility and precision in complex testing scenarios.
- Auto-Ranging Function: Both models simplify operation by automatically selecting the correct measurement range.
- Portable and User-Friendly Design: Compact and lightweight, ideal for various work environments, including tight spaces and automotive maintenance.
- Enhanced Readability: Features a backlit screen and a flashlight for improved visibility in dimly lit conditions.
- Convenience Functions: Includes auto shut-off to conserve battery life and a data hold function to freeze readings on the display.

Figure 2: TSM-522S Measurement Capabilities. This image illustrates the TSM-522S multimeter with its test leads, surrounded by icons representing its diverse measurement functions, including AC/DC Voltage, Diode, Capacitance, Resistance, Continuity, Frequency, NCV, Live Wire, and Flashlight.
4. Package Contents
Upon opening your TESMEN multimeter bundle, please verify that all items listed below are present:
- 1 x TESMEN TSM-522S Digital Multimeter
- 1 x TESMEN TSM-192 Digital Multimeter
- 1 x Set of Multimeter Test Leads (for TSM-522S)
- 1 x Storage Bag
- Batteries (pre-installed or included separately)
- 2 x User Manuals (one for each model)
5. Setup
5.1 Battery Installation
Both multimeters are typically powered by AAA batteries. Refer to the specific manual for each device for detailed battery compartment access and installation instructions. Ensure correct polarity when inserting batteries.
5.2 Connecting Test Leads (TSM-522S)
For most measurements with the TSM-522S, connect the black test lead to the "COM" (Common) input jack and the red test lead to the "INPUT" jack. For current measurements, refer to the specific current measurement section in the TSM-522S manual for correct lead placement.
6. Operating Instructions
6.1 TESMEN TSM-522S Smart Multimeter
The TSM-522S offers both intelligent auto-ranging mode and manual mode for specific measurements.

Figure 3: TSM-522S Large Color Display. This image highlights the 2.56-inch color smart screen of the TSM-522S, emphasizing its intuitive and clear display for easy reading of measurement results.
6.1.1 Smart Measurement Mode
In Smart Mode, the TSM-522S automatically identifies and measures AC/DC voltage, resistance, and continuity. Simply connect the test leads to the circuit, and the meter will display the appropriate reading.
6.1.2 Manual Measurement Functions
Press the "FUNC" button to cycle through various manual measurement modes:
- AC/DC Voltage Measurement: Connect test leads in parallel to the circuit. The meter will display the voltage.
- Resistance Measurement (Ω): Ensure the circuit is de-energized. Connect test leads across the component.
- Capacitance Measurement (F): Ensure the capacitor is discharged before testing. Connect test leads across the capacitor terminals.
- Continuity Test (♫): For checking if a circuit is open or closed. A low resistance indicates continuity, often accompanied by an audible beep.
- Diode Test (→|→): Measures the forward voltage drop of a diode.
- Frequency Measurement (Hz): Measures the frequency of an AC signal.
- Non-Contact Voltage (NCV) Detection: Hold the NCV sensing area near a live conductor. The meter will indicate the presence of AC voltage without direct contact.
- Live Wire Detection: Similar to NCV, specifically designed to identify live wires.

Figure 4: AC/DC Voltage Measurement with TSM-522S. This image illustrates the TSM-522S being used to measure AC voltage from a wall outlet and DC voltage from a car battery, illustrating its versatility for different power sources.

Figure 5: TSM-522S Non-Contact Voltage (NCV) Detection. This image shows the TSM-522S being used for NCV detection near a wall outlet, with visual indicators for low and high voltage, demonstrating its ability to detect live wires without physical contact.
6.2 TESMEN TSM-192 Handheld Multimeter
The TSM-192 is designed for portability and quick, intelligent measurements, making it ideal for field use and tight spaces.

Figure 6: TSM-192 Handheld Design. This image showcases the compact and handheld design of the TSM-192, illustrating its ease of use for testing in various environments, such as automotive maintenance.
6.2.1 Smart Auto-Mode Operation
The TSM-192 primarily operates in an intelligent auto-mode, automatically detecting and measuring common parameters like AC/DC voltage, resistance, and continuity. This simplifies operation, allowing for fast and effective testing.

Figure 7: TSM-192 Smart Auto-Mode. This image highlights the TSM-192's "Auto" mode display, emphasizing its fast, simple, and effective automatic measurement capabilities.
6.2.2 Multi-Functional Measurement (TSM-192)
Despite its compact size, the TSM-192 offers several key measurement functions:
- AC/DC Voltage: Automatically detected and measured.
- Resistance: Automatically detected and measured.
- Continuity: Provides an audible indication for continuous circuits.
- Live Wire Detection: Identifies live conductors.
- Phase Detection: Helps determine the phase of an AC circuit.
- Non-Contact Voltage (NCV): Detects AC voltage without direct contact.

Figure 8: TSM-192 Multi-Functional Measurement. This image shows the TSM-192 in use, demonstrating its ability to perform multiple measurements including AC/DC Voltage, Resistance, Continuity, Live Wire, Phase, and NCV, suitable for various electrical tasks.

Figure 9: TSM-192 Non-Contact Voltage (NCV) Detection. This image illustrates the TSM-192's NCV function, showing how it detects voltage near a wall outlet with visual indicators for low and high voltage, providing a safe way to identify live circuits.
7. Maintenance
7.1 Cleaning
Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents. Ensure the meter is completely dry before use.
7.2 Battery Replacement
When the low battery indicator appears on the display, replace the batteries immediately to ensure accurate readings and proper operation. Refer to the specific manual for each model for battery replacement procedures.
7.3 Storage
If the meter is not used for a long period, remove the batteries to prevent leakage and damage. Store the meters in their provided storage bag in a cool, dry place, away from direct sunlight and extreme temperatures.
8. Troubleshooting
If you encounter issues with your TESMEN multimeters, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on. | Dead or incorrectly installed batteries. | Check battery polarity; replace batteries. |
| No reading or "OL" (Overload) displayed. | Incorrect function selected; open circuit; measurement exceeds range. | Ensure correct function/range; check circuit continuity; verify measurement is within meter's limits. |
| Inaccurate readings. | Low battery; damaged test leads; environmental interference. | Replace batteries; inspect/replace test leads; move away from strong electromagnetic fields. |
| Continuity test does not beep. | Open circuit; high resistance; meter not in continuity mode. | Check circuit; ensure resistance is low enough; select continuity mode. |
If the problem persists after attempting these solutions, please contact TESMEN customer support.
9. Specifications
Below are the general specifications for the TESMEN TSM-522S and TSM-192 multimeters. For detailed electrical specifications for each measurement function, please refer to the individual user manuals included in the package.
| Attribute | Value |
|---|---|
| Brand | TESMEN |
| Models Included | TSM-522S Smart Multimeter & TSM-192 Handheld Multimeter |
| Power Source | Battery Powered |
| Color | Green |
| Measurement Type | Multimeter |
| Manufacturer | TESMEN |
| Date First Available | September 12, 2024 |
10. Warranty and Support
TESMEN products are designed for reliability and performance. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official TESMEN website. For technical support, troubleshooting assistance, or inquiries about replacement parts, please contact TESMEN customer service through their official channels.
You can visit the official TESMEN store on Amazon for more information: TESMEN Store




