1. Introduction
The ETCR3200C Double Clamp Ground Resistance Meter is a versatile instrument designed for precise measurement of earth resistance, DC current, soil resistivity, earth voltage, AC voltage, and grounding lead leakage current. It incorporates advanced technologies such as FFT (Fast Fourier Transform Algorithm) and AFC (Automatic Frequency Control) for enhanced accuracy and anti-jamming capabilities. This manual provides detailed instructions for the safe and effective use of your ETCR3200C meter.
2. Product Features
- Multiple Measurement Methods: Supports 4-wire, 3-wire, simple 2-wire, selection, and double clamp methods for comprehensive earth resistance measurements.
- Advanced Technology: Utilizes FFT (Fast Fourier Transform Algorithm) and AFC (Automatic Frequency Control) for superior anti-jamming performance and environmental adaptability, ensuring high consistency in retests.
- User-Friendly Design: Features unique plug receptacle indicators for easy connection, and a function selection knob that clearly displays all test methods for simple and fast operation.
- Durable Construction: Housed in a waterproof, crash-proof, and anti-drop protective case, making it ideal for outdoor construction sites.
- Large LCD Display: Equipped with a large LCD display with white backlight and bar graph indication for clear visibility of readings.
- Data Management: Includes alarm function, overload protection, automatic shutdown, data storage for up to 2000 groups, data access, and data upload via USB interface.
- Bluetooth Connectivity: Supports Bluetooth communication with Android systems. After installing the dedicated APP, mobile terminals can be used for testing operations and viewing test records.
3. Specifications
The following table details the technical specifications of the ETCR3200C Double Clamp Ground Resistance Meter:
| Parameter | Specification |
|---|---|
| Power Supply | DC7.4V 2600mAh rechargeable lithium battery |
| 2/3/4-wire Method Earth Resistance Range | 0.00Ω~300KΩ; Resolution: 0.01Ω; Accuracy: ±2%rdg±3dgt |
| Selection Method Earth Resistance Range | 0.00Ω~3000Ω; Resolution: 0.01Ω; Accuracy: ±2%rdg±3dgt |
| Double Clamp Method Earth Resistance Range | 0.00Ω~100Ω; Resolution: 0.01Ω; Accuracy: ±10%rdg±5dgt |
| Earth Voltage Measurement Range | 0.0~100V AC; Resolution: 0.1V; Accuracy: ±2%rdg±3dgt |
| Earth Current Measurement Range | 0.00mA~600.0A; Resolution: 0.00mA; Accuracy: ±2%rdg±3dgt |
| Soil Resistivity Measurement (ρ) Range | 0.00Ωm~9000KΩm; Resolution: 0.01Ωm |
| CT Size | φ70mm |
| Short-circuit Test Current | AC 250mA max |
| Open-circuit Test Current | AC 40V max |
| Test Frequency | 128Hz/111Hz/105Hz/94Hz (AFC) |
| Data Storage | 2000 groups |
| Automatic Shutdown | 15 Minutes after power on, automatic shut down without any operation |
| LCD Frame Dimension | 128mm×75mm |
| LCD Display Dimension | 124mm×67mm |
| Tester Dimension | 80mm(L)×260mm(W)×160mm(H) |
| Total Weight | 6700g (including package) |
| Working Current (Standby) | Around 25mA (Backlight close) |
| Working Current (Measurement) | 100mA (Backlight close) |
| Auxiliary Ground Rod | 4PCS: φ10mm×150mm |
| Battery Included | Yes |
| Display Type | Digital Only |
| Certification | CE |
For a visual representation of the specifications, refer to the image below:
4. Package Contents
The ETCR3200C package includes the following items:
- Tester: 1 PC
- Current Clamp Sensor: 2 PCS
- Ground Rod: 4 PCS
- Testing Wires: 6 PCS (Red 40m, Yellow 30m, Green 20m, Black 10m, Red 1.6m, Black 1.6m)
- USB Communication Cable: 1 PC
- Special Recharger: 1 PC
- Tester Bag: 1 PC
5. Setup and Connections
Before operating the ETCR3200C, ensure all components are present and in good condition. The meter is housed in a protective case, which also features wiring diagrams on the inside of the lid for quick reference.
Component Identification:
Refer to Figure 5.2 for the location of the following interfaces:
- Data Line Interface: For USB communication.
- Charging Interface: For connecting the special recharger.
- Jack Indicator Light: Provides visual feedback.
- Auxiliary Grounding Electrode Interface (ES): For connecting auxiliary electrodes.
- Grounding Electrode Interface (E): For connecting the main grounding electrode.
- Voltage Electrode Interface (P/S): For voltage measurements.
- Current Electrode Interface (C/H): For current measurements.
- C1 Same-Name Port & C2 Public Port: Specific ports for certain measurement configurations.
- LCD: Digital display for readings.
- Gear Knob: Rotary switch for selecting measurement functions.
- Function Key Area: Buttons for TEST, HOLD, SET, AL (Alarm), CLR (Clear), READ.
- Test Indicator Light: Indicates test status.
Initial Setup Steps:
- Open the top cover of the protective case.
- Ensure the rechargeable lithium battery is adequately charged. Connect the special recharger to the Charging Interface if needed.
- Familiarize yourself with the wiring diagrams located on the inside of the case lid. These diagrams illustrate the correct connections for different measurement methods.
- Select the appropriate measurement range using the Gear Knob.
- Connect the test wires and ground rods according to the specific measurement method you intend to use.
A visual demonstration of the product setup and operation can be found in the video below:
6. Operating Instructions
The ETCR3200C supports various methods for measuring earth resistance and other parameters. Always refer to the wiring diagrams on the case lid for correct connections.
General Measurement Procedure:
- Power On: Turn the Gear Knob to the desired measurement function. The device will power on.
- Connect Test Leads: Connect the test leads and auxiliary electrodes (ground rods) to the corresponding ports (E, ES, P, C) on the meter and to the system under test as per the chosen measurement method.
- Select Range: Use the Gear Knob to select the appropriate measurement range.
- Initiate Test: Press the TEST button to begin the measurement.
- Read Value: The measurement result will be displayed on the LCD.
- Hold Reading: Press the HOLD button to freeze the current reading on the display. Press again to release.
Specific Measurement Methods:
- 4-wire, 3-wire, and Simple 2-wire Methods: These methods are typically used for measuring earth resistance. Follow the specific wiring diagrams on the case lid for each method. The 4-wire method offers the highest accuracy by eliminating the resistance of the test leads.
- Selection Method: Used for specific earth resistance measurements, refer to the diagram for connection details.
- Double Clamp Method: This method allows for earth resistance measurement without disconnecting the grounding system, using the two current clamp sensors. Connect the clamps as indicated in the diagram and ensure they are properly closed around the conductors.
- Earth Voltage Measurement: Select the Earth Voltage function using the Gear Knob and connect the leads appropriately to measure AC voltage.
- Earth Current Measurement: Use the current clamp sensors to measure earth current. Select the Earth Current function and clamp the sensor around the conductor.
- Soil Resistivity Measurement (ρ): This measurement typically involves the 4-wire method with specific spacing of the ground rods. Refer to the manual's detailed instructions for calculating soil resistivity based on the measured resistance and electrode spacing.
7. Bluetooth Communication and APP Usage
The ETCR3200C supports Bluetooth connectivity with Android devices, allowing for remote testing operations and viewing of test records via a dedicated mobile application.
Steps for Bluetooth Connection and APP Use:
- Download APP: Scan the QR code provided on the meter's lid or in the full user manual to download and install the official ETCR APP on your Android mobile terminal.
- Enable Bluetooth: Ensure Bluetooth is enabled on both your ETCR3200C meter and your Android device.
- Pair Devices: Open the ETCR APP on your mobile device. The app will search for available ETCR devices. Select your ETCR3200C from the list to pair.
- Remote Operation: Once connected, you can use the mobile app to initiate tests, view real-time measurements, and configure certain parameters remotely.
- View Test Records: The app allows you to access and review stored test records directly on your mobile device.
8. Data Storage and Upload
The ETCR3200C can store up to 2000 groups of measurement data. This data can be accessed directly on the device or uploaded to a computer for further analysis and printing.
Data Access on Device:
- Use the READ button in the Function Key Area to browse through stored data records.
- The LCD will display the stored measurements.
Data Upload via USB Interface:
- Connect the provided USB communication cable to the Data Line Interface on the meter and to a computer.
- Install the necessary software (usually provided with the device or available for download from the manufacturer's website) on your computer.
- Use the software to monitor measurements, upload stored data, save records, and print reports.
9. Maintenance and Battery Information
Proper maintenance ensures the longevity and accuracy of your ETCR3200C meter.
Battery Management:
- The meter is powered by a DC7.4V 2600mAh rechargeable lithium battery.
- When the battery voltage decreases to approximately DC 7.2V±0.1V, a low battery voltage symbol (" ") will appear on the display, reminding you to recharge or replace the battery.
- Use only the provided special recharger for charging.
Cleaning and Storage:
- Keep the meter and accessories clean and dry. Wipe with a soft, damp cloth if necessary. Do not use abrasive cleaners or solvents.
- Store the meter in its protective case when not in use to prevent damage from impacts, dust, and moisture.
- Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
Automatic Shutdown:
- The meter features an automatic shutdown function. It will automatically power off after 15 minutes of inactivity to conserve battery life.
10. Troubleshooting
This section addresses common issues you might encounter with your ETCR3200C meter.
Alarm Function:
- If a measured value exceeds a preset alarm setting, the meter will indicate this with a "Toot-toot-toot" alarm. Check your connections and the measurement range if this occurs unexpectedly.
Low Battery Indication:
- A low battery symbol on the display indicates that the battery needs recharging. Connect the special recharger to the device.
For other issues, ensure all connections are secure, the correct measurement method is selected, and the battery is charged. If problems persist, consult the full user manual or contact customer support.
11. User Tips
No specific user tips from reviews or Q&A were available for this product. However, general best practices for using precision electrical testing equipment include:
- Always ensure proper grounding and safety precautions when working with electrical systems.
- Verify the integrity of all test leads and connections before each use.
- For critical measurements, perform multiple readings to ensure consistency.
- Keep the meter clean and free from dust and moisture to maintain accuracy and extend its lifespan.
12. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official documentation provided with your purchase or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.
