1. Introduction
This manual provides comprehensive instructions for the safe and effective use of the PeakTech True RMS P 3131 Clamp Meter with Multimeter. This device is designed for measuring AC/DC currents without circuit interruption, as well as AC/DC voltage and resistance, with continuity testing capabilities. It features a 3 3/4 digit LCD display with True RMS measurement for accurate readings.
Please read this manual thoroughly before operating the device and retain it for future reference.
2. Safety Information
WARNING: Improper use of this meter can cause damage, shock, injury, or death. Always follow all safety precautions.
- Always adhere to local and national safety codes.
- Do not use the meter if it appears damaged or if the insulation on test leads is compromised.
- Ensure the meter is set to the correct function and range before making measurements.
- Avoid contact with live circuits. Use appropriate personal protective equipment (PPE).
- The device is rated for CAT II 600V. Do not exceed these limits.
- Replace batteries promptly when the low battery indicator appears.
- Do not operate the meter in explosive atmospheres.
3. Product Overview and Components
The PeakTech P 3131 is a robust and reliable clamp meter. Familiarize yourself with its main components:
Figure 1: Front view of the PeakTech P 3131 Clamp Meter, showing the clamp jaw, function selector, LCD display, and input terminals.
- Clamp Jaw: For non-contact AC/DC current measurement.
- Function Selector Dial: To select measurement modes (A~, A=, V~, V=, Ω/Continuity, OFF).
- LCD Display: Shows measurement readings, units, and indicators.
- Buttons: AC/DC, ZERO, H/MAX (Data Hold/Max Hold).
- Input Terminals: COM (common) and VΩ (voltage/resistance) for test leads.
- Hand Guard: Provides protection against accidental contact.
4. Setup
4.1 Battery Installation
The PeakTech P 3131 requires two 1.5V AAA batteries (included). To install or replace batteries:
- Ensure the device is turned OFF.
- Locate the battery compartment cover on the rear of the meter.
- Use a screwdriver to open the compartment.
- Insert the two AAA batteries, observing correct polarity (+ and -).
- Replace the battery compartment cover and secure it with the screw.
When the low battery indicator appears on the display, replace the batteries immediately to ensure accurate measurements.
4.2 Connecting Test Leads
For voltage, resistance, and continuity measurements, connect the supplied test leads:
- Insert the black test lead into the COM (common) input terminal.
- Insert the red test lead into the VΩ input terminal.
Figure 2: PeakTech P 3131 Clamp Meter shown with its carrying case, test leads, batteries, and user manual.
5. Operating Instructions
5.1 Power On/Off
Rotate the function selector dial from the "OFF" position to any desired measurement function to power on the meter. To power off, rotate the dial back to "OFF". The meter features an automatic power-off function (can be deactivated) to conserve battery life.
5.2 AC/DC Current Measurement (Clamp)
To measure current without breaking the circuit:
- Turn the function selector dial to the A~ (AC Current) or A= (DC Current) position.
- Press the AC/DC button if you need to switch between AC and DC current modes (if the dial position combines them).
- Press the ZERO button to zero the display before measuring DC current, especially for small currents, to compensate for residual magnetism.
- Open the clamp jaw by pressing the trigger.
- Enclose only one conductor with the clamp jaw. Ensure the jaw is fully closed.
- Read the current value on the LCD display.
Figure 3: The PeakTech P 3131 Clamp Meter in use, measuring current on a single conductor within an electrical panel.
5.3 AC/DC Voltage Measurement
To measure voltage:
- Connect the test leads as described in Section 4.2.
- Turn the function selector dial to the V~ (AC Voltage) or V= (DC Voltage) position.
- Connect the test probes in parallel to the circuit or component you wish to measure.
- Read the voltage value on the LCD display.
5.4 Resistance and Continuity Measurement
To measure resistance or check for continuity:
- Connect the test leads as described in Section 4.2.
- Turn the function selector dial to the Ω/))) (Resistance/Continuity) position.
- For resistance: Connect the test probes across the component. Ensure the circuit is de-energized.
- For continuity: Touch the test probes to the two points you want to check. A continuous beep indicates a low-resistance path (continuity).
- Read the resistance value on the LCD display.
5.5 Special Functions
- True RMS: The meter measures True Root Mean Square values for AC voltage and current, providing accurate readings for non-sinusoidal waveforms.
- Data Hold (H): Press the H/MAX button briefly to freeze the current reading on the display. Press again to release.
- Maximum Value Hold (MAX): Press and hold the H/MAX button to capture and display the maximum measured value. Press again to exit.
- ZERO Function: Used to zero the display for DC current measurements to eliminate offset errors.
- Auto Ranging: The meter automatically selects the appropriate measurement range.
- Auto Power Off: The meter automatically turns off after a period of inactivity to save battery. This feature can typically be disabled by holding a specific button during power-on (refer to the device's on-screen indicators or a more detailed manual if available).
6. Maintenance
6.1 Cleaning
Wipe the meter's case with a damp cloth and a 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 instructions on battery replacement. Always use two fresh 1.5V AAA batteries. Remove batteries if the meter is not used for an extended period to prevent leakage.
6.3 Storage
Store the meter in a cool, dry place, away from direct sunlight and extreme temperatures. Use the provided carrying case for protection.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on. | Dead or incorrectly installed batteries. | Check battery polarity; replace batteries. |
| "OL" or "OVER" displayed. | Measurement exceeds selected range or meter's maximum capacity. | Select a higher range (if manual ranging) or ensure measurement is within meter's limits. |
| Inaccurate DC current reading. | Residual magnetism in clamp jaw. | Press the ZERO button before measurement. |
| No continuity beep. | Open circuit or high resistance. | Check connections; ensure circuit is complete. |
If problems persist, contact PeakTech customer support or a qualified service technician.
8. Technical Specifications
| Parameter | Specification |
|---|---|
| Display | 3 3/4 digit LCD, max. 3999 counts |
| DC Voltage (DCV) | 0.1 mV to 600 V (Accuracy: 0.5% + 2 digits) |
| AC Voltage (ACV) | 1 mV to 600 V (Accuracy: 1.5% + 5 digits) |
| DC Current (DCA) | 10 mA to 300 A (Accuracy: 1% + 2 digits) |
| AC Current (ACA) | 10 mA to 300 A (Accuracy: 1% + 3 digits) |
| Resistance (Ω) | 0.1 Ω to 40 MΩ (Accuracy: 0.9% + 2 digits) |
| Continuity Test | Buzzer function |
| True RMS | Yes, for AC measurements |
| Jaw Opening | 22 mm max. conductor diameter |
| Safety Rating | EN 61010-1, CAT II 600 V |
| Power Supply | 2 x 1.5V AAA batteries |
| Dimensions (L x W x H) | 192 x 66 x 27 mm (approx. 7.56 x 2.6 x 1.06 inches) |
| Weight | 205 g (approx. 0.45 lbs) |
9. Warranty and Support
PeakTech products are manufactured under strict quality control. This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. Please refer to the warranty card included with your product or visit the official PeakTech website for detailed warranty terms and conditions.
For technical support, service, or calibration inquiries, please contact your local PeakTech distributor or the PeakTech customer service department. Contact information can typically be found on the PeakTech website or in the product packaging.
