1. Introduction
This manual provides detailed instructions for the safe and effective operation, maintenance, and troubleshooting of the TOTAL Digital AC Clamp Meter, model TMT410004. This device is designed for measuring AC current, AC/DC voltage, resistance, continuity, and other electrical parameters. Please read this manual thoroughly before using the instrument to ensure proper function and safety.
2. Safety Information
WARNING: To avoid electric shock or personal injury, read and understand all safety information before using this meter.
- Always adhere to local and national safety codes.
- Do not use the meter if it appears damaged or if the insulation on the test leads is compromised.
- 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 when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
- Remove the test leads from the meter before opening the battery cover.
- Ensure the function dial is set to the correct range before making measurements.
- Do not operate the meter in explosive gas, vapor, or dust environments.
- Always use appropriate personal protective equipment (PPE).
3. Product Overview
The TOTAL Digital AC Clamp Meter TMT410004 is a versatile tool for electrical measurements. Familiarize yourself with its components:

Figure 1: Front view of the TOTAL Digital AC Clamp Meter TMT410004, showing the clamp jaws, display, function dial, and control buttons.
3.1. Components
- Current Clamp Jaws: Used for non-contact measurement of AC current.
- Jaw Trigger: Opens the clamp jaws.
- Function Dial: Selects the desired measurement mode (e.g., ACV, DCV, ACA, Resistance, Continuity).
- LCD Display: Shows measurement readings, units, and function indicators.
- Input Terminals: For connecting test leads (COM, VΩHz).
- Function Buttons:
- FUNC: Selects sub-functions within a dial position (e.g., AC/DC, Diode/Continuity).
- RAN (Range): Manually selects measurement range or toggles auto-ranging.
- MAX (Maximum Hold): Holds the maximum measured value.
- REL (Relative): Measures the difference between a stored value and the current reading.

Figure 2: The TOTAL Digital AC Clamp Meter TMT410004, shown with its protective carrying case and product packaging, highlighting its portability and storage solution.
4. Setup
4.1. Battery Installation
The meter requires batteries for operation. To install or replace batteries:
- Ensure the meter is turned OFF and disconnect all test leads from the input terminals.
- Locate the battery compartment cover on the back of the meter.
- Use a screwdriver to loosen the screw(s) securing the cover.
- Remove the cover and insert new batteries, observing correct polarity (+ and -). The meter typically uses AAA batteries (refer to specifications for exact type).
- Replace the battery compartment cover and secure it with the screw(s).
Note: Batteries are not included with the product and must be purchased separately.
5. Operating Instructions
Before taking any measurements, ensure the meter is in good working condition and the test leads are properly connected (if applicable).
5.1. Measuring AC Current (ACA)
- Turn the function dial to the ACA position.
- Press the jaw trigger to open the clamp jaws.
- Encircle only one conductor of the circuit with the clamp jaws. Ensure the jaws are fully closed.
- Read the AC current value on the LCD display.
- Important: Do not clamp around multiple conductors simultaneously, as this will result in an inaccurate reading (the magnetic fields will cancel each other out).
5.2. Measuring AC/DC Voltage (V)
- Insert the black test lead into the COM terminal and the red test lead into the VΩHz terminal.
- Turn the function dial to the V~ (AC Voltage) or V- (DC Voltage) position. If a combined AC/DC voltage setting exists, use the FUNC button to toggle between AC and DC.
- Connect the test probes in parallel to the circuit or component you wish to measure.
- Read the voltage value on the LCD display.
5.3. Measuring Resistance (Ω)
- Insert the black test lead into the COM terminal and the red test lead into the VΩHz terminal.
- Turn the function dial to the Ω (Resistance) position.
- Ensure the circuit or component under test is de-energized before connecting the test probes.
- Connect the test probes across the component.
- Read the resistance value on the LCD display.
5.4. Continuity Test
- Insert the black test lead into the COM terminal and the red test lead into the VΩHz terminal.
- Turn the function dial to the Ω (Resistance) or Continuity position (if separate). Use the FUNC button if necessary to select continuity.
- Ensure the circuit or component under test is de-energized.
- Connect the test probes across the circuit or component.
- If the resistance is below a certain threshold (typically <50Ω), the meter will emit an audible beep, indicating continuity.
5.5. Diode Test
- Insert the black test lead into the COM terminal and the red test lead into the VΩHz terminal.
- Turn the function dial to the Diode position (often shared with continuity/resistance, use FUNC button to select).
- Ensure the diode is de-energized.
- Connect the red test probe to the anode and the black test probe to the cathode of the diode. The display will show the forward voltage drop.
- Reverse the probes. The display should show "OL" (Open Loop) for a good diode.
5.6. Using Function Buttons (RAN, MAX, REL)
- RAN (Range): Press to switch between auto-ranging and manual ranging. In manual ranging, press repeatedly to cycle through available ranges.
- MAX (Maximum Hold): Press to capture and display the maximum reading. Press again to exit.
- REL (Relative): Press to store the current reading as a reference. Subsequent readings will display the difference from this reference. Press again to exit.
6. Maintenance
6.1. Cleaning
Wipe the meter's case with a damp cloth and mild detergent. Do not use abrasives or solvents. Ensure the meter is completely dry before use.
6.2. Battery Replacement
Refer to Section 4.1 for battery replacement instructions. Replace batteries promptly when the low battery indicator appears on the display to ensure accurate measurements.
6.3. Storage
If the meter is not used for an extended period, remove the batteries to prevent leakage and damage. Store the meter in a cool, dry place, away from direct sunlight and extreme temperatures.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on. | Dead or incorrectly installed batteries. | Check battery polarity or replace batteries. |
| "OL" (Overload) displayed. | Measurement exceeds the selected range or meter's maximum capacity. | Select a higher range (if in manual range) or ensure the measurement is within the meter's specifications. |
| Inaccurate readings. | Low battery, incorrect function selection, poor test lead connection, external interference. | Replace batteries, verify function dial setting, ensure secure test lead connection, move away from strong electromagnetic fields. |
| No continuity beep. | Circuit resistance is too high, or continuity function not selected. | Ensure the circuit is de-energized. Select continuity mode. Check for open circuits. |
8. Specifications
The following are general specifications for the TOTAL Digital AC Clamp Meter TMT410004. Specific ranges and accuracies may vary; refer to the product label for precise details.
- Model: TMT410004
- Brand: TOTAL
- Type: Digital AC Clamp Meter
- AC Current Measurement: Up to 1000A
- AC Voltage Measurement: Up to 750V
- DC Voltage Measurement: Up to 1000V
- Resistance Measurement: Up to 60MΩ
- Power Source: Battery Powered (Requires Yes, Batteries Included? No)
- Item Weight: 690 g (approximately 0.69 Kilograms)
- Product Dimensions (L x W x H): 28.3 x 14 x 6 cm
- Material: Mixed
- Included Components: Test leads, carrying case (implied by "Tools" and image)
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official TOTAL website. Keep your purchase receipt as proof of purchase for any warranty claims.
Manufacturer: TOTAL





