ATORCH DT24TW Bidirectional Battery Capacity Monitor: User Manual and Specifications

Introduction

The ATORCH DT24TW is a color screen, Bluetooth-enabled battery capacity monitor designed for data transmission. It measures and displays various battery parameters including voltage, current, power, true capacity, battery temperature, low capacity alarms, low voltage alarms, remaining discharge time, and remaining charging time. It accurately reflects the battery pack's working status.

Important Statement: Upon initial power-on, the meter may not immediately display the battery's capacity. It is crucial to follow the manual's instructions for a series of operations to ensure accurate capacity display. Novice users are advised to read the manual carefully or contact technical support.

Voltage Measurement Range: DC 8~240V

Current Measurement Range: Supports various shunts for ranges including 100A, 200A, 300A, 400A, 500A, 600A, 1000A.

1. Scope of Application and Electrical Measurement Specifications

This instrument is suitable for a wide range of applications, including:

• Electric vehicles, RVs, cars
• Emergency power supplies, energy storage power supplies
• Measuring equipment, medical equipment
• Various instruments and other products utilizing battery equipment.

It is compatible with all types of battery packs, such as:

• Lithium batteries
• Lithium iron phosphate batteries
• Lead-acid batteries
• Nickel hydrogen batteries

The device operates within a voltage range of DC 8~240V.

2. Wiring Instructions

Attention: Please strictly follow the wiring diagram. The sampler (shunt) must be connected in series within the negative (-) circuit of the battery. Do not connect the shunt to the positive (+) circuit.

The data cable length can be customized without affecting data transmission or measurement accuracy.

1. The sampler must be connected in series to the negative circuit of the battery pack. Connect the 'B-' terminal on the sampler to the battery pack's negative terminal ('B-'). Connect the negative electrode 'P-/C-' to the 'P-' terminal for charging and discharging.
2. Use a thin red wire to connect the positive terminal of the battery to the sampler's 'B+' terminal. This provides power to the meter and is used for voltage sampling.
3. Connect the sampler to the control panel using the provided data cable. Ensure connections are correct before powering on.
4. Wiring Principle: All current flowing through the battery must pass through the sampler and shunt.

Warning: The wire connecting the battery pack's negative terminal ('B-') to the sampler's 'B-' terminal should be as short and thick as possible to minimize voltage drop and ensure accurate measurements.

3. Main Description and Key Operation Method

The DT24TW system comprises several key components:

• Current Sampler (Shunt): Connects in series to the battery's negative terminal.
• Battery Temperature Probe: A 1-meter wire to be attached to the battery surface for temperature measurement.
• Bidirectional Current Shunt: Connects to the negative pole of the charging or device.
• Panel Cable: A 3-meter cable connecting the shunt to the display panel.

The main display panel features:

• 2.4-inch High-Definition Digital Color Display: Shows various operating states and parameters.
• Bluetooth Indicator: Shows Bluetooth connectivity status.
• 'Value +' Key: Used to increase values or fill battery capacity (long press 5s).
• 'Mode and Setting' Key ('M'): Long press to enter background settings; short press to switch menus.
• 'Value -' Key: Used to decrease values or reset zero battery capacity (long press 5s).
• 'Power' Button: Long press to access the reset menu; short press to switch menu items.

The display shows parameters like Voltage (Vol), Current (Cur), Power (Pwr), Capacity (Cap), Time (Tim), and battery percentage.

4. Usage Steps

1) Connect and Check the Current:

After wiring, power on the device. The screen should display battery voltage, current, and factory default capacity percentage. If no display appears, power off and re-check connections. Discharge or charge the battery and verify the displayed current matches the actual current. Significant discrepancies may indicate incorrect wiring.

2) Inspection and Setting of Effective Battery Capacity:

For accurate readings, the effective battery capacity must be set correctly upon first use.

1. Long press the 'M' key to enter the background settings interface.
2. Short press 'M' until the second setting item (Capacity setting) is highlighted (turns purple).
3. Use the '+' or '-' buttons to adjust the capacity value. It is recommended to set this value slightly higher than the battery's actual capacity (e.g., 250Ah for a 200Ah battery).
4. Empty the battery pack. Then, long press the '-' key for 5 seconds to reset the battery gauge's capacity to 0%.
5. Charge the battery pack fully.
6. Set the capacity value displayed after full charge into the second capacity setting column in the meter's background to complete the effective capacity setting.

3) Capacity Reset (Battery Capacity Reset and Full Capacity Setting):

The displayed capacity may not be accurate after the first use or battery replacement. A zero capacity or full capacity operation is required, ensuring the background capacity value matches the tested battery's total capacity.

1. After emptying the battery, press and hold the '-' button for 5 seconds to reset the capacity value to 0%.
2. After fully charging the battery, press and hold the '+' button for 5 seconds to set the capacity value to 100%. (The total full capacity value is set in the background).

Warning: Ensure the measured battery capacity parameters are aligned with the meter's settings as described to guarantee accurate readings.

5. Use Settings

To access and modify settings:

1. Long press the 'M' button to enter the background settings interface.
2. Short press the 'M' button to cycle through the settings sections.
3. If a number is flashing, short press '+' or '-' to adjust it.
4. To adjust the flashing number more rapidly (advance or retreat), long press the '+' or '-' buttons.

Key settings include:

• 01. Language: Select between Chinese and English.
• 02. Capacity Setting: Set the battery's total capacity (e.g., 100.00Ah).
• 03. Full Capacity Voltage: Voltage threshold above which capacity is considered 100%.
• 04. Zero Capacity Voltage: Voltage threshold below which capacity is reset to 0%.
• 05. Low Capacity Alarm: Set a capacity threshold for low capacity alerts.
• 06. Low Voltage Alarm: Set a voltage threshold for low voltage alerts.
• 07. Display Brightness: Adjust screen brightness.
• 08. Standby Brightness: Adjust brightness in standby mode.
• 09. Enter Standby Time: Set time before entering standby.
• 10. Temp Calibration: Calibrate temperature readings.
• 11. Default Setting: Restore factory default settings.
• 12. Exit: Return to the main measurement interface.

Important Notes on Voltage Settings: Factory defaults for full capacity voltage and zero capacity voltage are 0V, which is invalid. Set these parameters only after understanding the battery pack's full charge and discharge voltage characteristics. If you know the battery's total capacity, zero capacity voltage, and full capacity voltage, you can set these parameters accordingly.

Simple Tips for Setting Battery Capacity:

• Known Battery Capacity: Set the measured battery capacity (in Ah) directly in the meter's background settings.
• Unknown Battery Capacity: After fully charging or discharging the battery once, use the displayed capacity value to synchronize and align the meter's capacity reading.

7. System Shutdown and Current Reset Interface Usage

To access these functions:

1. Long press the "ON/OFF" button to enter the system interface.
2. Short press the 'M' button to cycle through options.
3. Long press the 'M' button to execute the selected function.

Available options:

• 01. No Load Current Clearing: Reset current to "0A" when the product shows a current value without load. Do not operate when there is a load.
• 02. System Shutdown: Shut down the system to enter zero power mode, useful when the battery is not used for extended periods. Do not shut down while current is flowing to avoid display errors.
• 03. System Reset: Restore the system to its factory default value in case of instability or data disorder. Note that all previously set parameters, including battery capacity, will be cleared.
• 04. Exit: Return to the main measurement interface.

8. Installation and Fixation Instructions for Panel

To install the panel:

1. Cut an installation hole according to the specified dimensions.
2. Peel off the double-sided adhesive tape and protective paper from the back of the panel.
3. Insert the panel into the rectangular hole.
4. Press the edges firmly to ensure the adhesive sticks securely to the panel.

9. User Initiated Calibration

To perform user calibration:

1. While in the background settings interface, long press the '+' and '-' keys simultaneously to enter the user calibration mode.
2. Short press the 'M' key to change the color and switch between columns (e.g., no-load current reset, voltage, current).
3. Short press '+' or '-' keys to perform current reset or adjust calibration coefficients.
4. The goal is to make the calibrated voltage and current values match those displayed by your own standard instrument.

Calibration Example:

10. Connecting a Mobile App via Bluetooth

The DT24TW can connect to a mobile app for enhanced measurement and control.

1) Apple Mobile APP:

Search for "E_test" in the Apple App Store to download and install the application. Open the app, click the Bluetooth icon, and select "DL24-BLE" to connect. This enables remote control, settings adjustments, and real-time monitoring of discharge status, data, and curves.

2) Android Phone APP (Supports Android 5.0 and above):

Scan the QR code on the device or search for "E-test" on Google Play to download and install the app. After installation, open the app and click the Bluetooth icon to select "DL24-BLE" for connection. Bluetooth pairing is not required; direct selection within the app is sufficient.

Android APP Download Address: http://www.mediafire.com/folder/31bc15uhq8odb/E-meter

11. Charging and Discharging Wiring Methods

The device supports bidirectional current, allowing for both charging and discharging measurements. Refer to the diagrams for correct wiring configurations for battery discharge and battery charging.

12. Support Firmware Upgrade for Mobile Apps

The device supports firmware upgrades via mobile apps using Bluetooth. The process involves connecting to the app and initiating the upgrade through the app interface.

Product Parameters:

• Measuring Voltage Range: 8~240V
• Measuring Current Range: Available with different shunts: 0.1~100A, 0.1~200A, 0.2~300A, 0.3~400A, 0.4~500A, 0.5~600A, 1~1000A.
• Measuring Capacity Range: 0~99999Ah
• Panel Size: Length 85.7mm x Width 63mm
• Panel Installation Size: Length 75.8mm x Width 52.6mm
• External Shunt Board Size: Length 58.5mm x Width 54mm

13. Product Series

ATORCH offers various models in the DT24P and DT24TW series, including:

• DT24P-100A Bidirectional Current and Voltmeter
• DT24P-200A Bidirectional Current and Voltmeter
• DT24P-300A Bidirectional Current and Voltmeter
• DT24P-400A Bidirectional Current and Voltmeter
• DT24P-500A Bidirectional Current and Voltmeter
• DT24P-600A Bidirectional Current and Voltmeter
• DT24P-1000A Bidirectional Current and Voltmeter

Each series typically includes the main unit, a 3-meter cable, and a 0.4-meter temperature probe.