DT24P Series User Manual

1. Product Description

This product is a multifunctional type, used for battery internal resistance testing, capacity testing, power testing, voltage and current testing, DC parameter monitoring, percentage power display, modification of electric vehicles, RVs, and many other applications. It is universally applicable for measuring any battery, whether it is a lead-acid battery, ternary lithium battery, lithium iron phosphate, or other types of DC batteries, as long as the operating voltage range (0~1000V) is compatible. It can also be connected wirelessly via a mobile phone/computer inspection APP for testing when installed in a vehicle. Features include set voltage alarms (high and low), over-power alarms, and other protection settings. A separate power-off relay can be purchased to control power cut-off.

ATORCH has developed a new model featuring a wide voltage and high current range (1000V, 1000A), a high-power large color screen, and Bluetooth digital transmission for curve version display. This multi-function electric energy meter supports three major upper computer connection systems and APP software, allowing wireless connection to Android, Apple, and PC computers. It provides readily available measurement parameters for various applications, offering versatility.

2. Product Application

This product is used to detect the capacity of various batteries, perform discharge and aging tests on various power adapters, and measure the voltage, current, and power of various DC power supplies.

3. Matters Needing Attention

• When the test power supply is higher than 36V, please install a switch and pay attention to electrical safety.
• If using the battery power-off relay module, ensure the corresponding parameters of the current battery type are queried and set accurately in the DT24P background menu for low and full values. This allows the system to control the relay during discharge or charging. If the set value exceeds the range, the system will send a control voltage, and the relay will automatically disconnect the power path to prevent over-discharge or over-charge damage to the battery (power-off relay sold separately).
• If enabling the external power-off relay, use a sufficient voltage from the independent power supply for the relay.
• The product must be powered independently with a 5-24V DC power supply; do not input battery power directly to the power input.

4. Appearance Structure Diagram

The display screens are consistent across different shunts. The diagram illustrates the DT24P tester and its shunt. The tester features a 2.4-inch IPS HD digital color screen, a Bluetooth indicator light (visible after successful connection), and a Product Key button. It includes a Relay interface and an NTC JACK for an external temperature probe. The shunt has terminals for connecting the battery's positive and negative poles, labeled 'Connect the positive and negative poles of the battery'. It also has a Relay interface and an NTC JACK. Wiring connections are shown for 'Connect battery V- IN' and 'Connect battery V+ IN'. The shunt is equipped with terminals for 'Load thick wire' and power supply interfaces: 'USB Android power supply interface' and '2PIN red and black wire independent power supply'. Notes indicate that the instrument requires an independent 5-24V DC power supply and warns that connecting the battery directly to the meter's power input (more than 24V) risks damaging the device.

5. Technical Parameters of Different Shunts

6. Function Interface Introduction

This product features a high-definition 2.4-inch color Chinese and English display screen designed for versatile functional interfaces. Various parameters are displayed on a single screen, and different function interfaces can be switched by short-pressing a button.

Interface Operation:

1. Powering On: Connect an independent 5-24V power supply. The startup screen will appear.
2. Switching Interfaces: After powering on, short press the "+" or "-" key to switch between different function interfaces and the battery percentage interface.
3. Function Interface: Short press the "M" key to check the electricity unit price. To adjust the unit price, press "M" to cycle through decimal places, units, tens, and hundreds, then use "+" or "-" to increase or decrease the value.
4. Percentage Interface: The battery percentage is displayed with color coding: green for over 30%, yellow for less than 30%, and red for less than 10%. A blue light indicates power is on. To display battery percentage accurately, long-press the "M" key to set the maximum and minimum voltage in the background. The calculation formula is: battery percentage = (current voltage - minimum voltage) / (full charge voltage - minimum voltage) X100 %.
5. Low-Voltage Alarm Reminder: If the test voltage drops below a set low percentage value (e.g., 306V), this interface appears. To set this, long-press "M" to enter the background, select 'battery voltage percentage low', and adjust using "+" or "-".
6. High-Pressure Alarm Reminder: If the test voltage exceeds a set high percentage value (e.g., 296V), this interface appears. To set this, long-press "M" to enter the background, select 'battery voltage percentage Full', and adjust using "+" or "-".
7. Over-Power Alarm Reminder: If the power threshold is exceeded (e.g., 998.96W), this interface appears. To set this, long-press "M" to enter the background, select 'Over-Power', and adjust using "+" or "-".
8. System Background Interface: Long-press the "M" key to enter background settings. Use "M" to switch between options and "+"/"-" to adjust values. Detailed functions and settings are available in the system background setup.

Key Button Operation Description:

• Use "+" or "-" keys to switch between different function interfaces.
• Long-press the "M" key to enter product background settings; long-press again to return to the test interface.
• In the main interface, short-press "M" to flash the value (e.g., 000.00) and use "+" or "-" to set electricity bill values.
• To switch between Chinese and English, long-press the "M" key to enter background settings, then use "+" or "-" to select the language.

7. Battery Internal Resistance Detection Function

To detect internal resistance, first measure the no-load battery voltage (U1). Then, connect the load and pass current (I), measuring the on-load voltage (U2). The internal resistance (R) can be calculated using the formula: R = (U1 - U2) / I.

The process is illustrated with two diagrams: one showing the battery connected without the load, and the second showing the battery connected with the load after testing the no-load voltage. Both diagrams emphasize the need for an independent 5-24V power supply for the screen to display data.

8. Compatible with Mainstream Online APPS

The DT24P tester is compatible with Android, iOS, and PC systems for online testing via Bluetooth.

1) Apple Mobile APP: Search for "E_test" in the Apple App Store to download and install. Open the app, click the Bluetooth icon, select "DL24-BLE" to connect. This enables remote control, settings, and viewing of discharge status, voltage, current, and power curves.

2) Android Phone APP (Android 5.0 and above): Scan the QR code on the device or search for "E-test" on Google Play. After installation, open the app, click the Bluetooth icon, and select "DL24-BLE" to connect. No Bluetooth pairing is required; the app directly selects the device. The download address for the Android APP is: http://www.mediafire.com/folder/31bc15uhq8odb/E-meter

App Connection Method

To connect the "E-test" APP:

1. When the USB tester is powered on, the Bluetooth indicator flashes. Turn on your phone's Bluetooth and open the "E-test" App. Allow Bluetooth access.
2. Click the Bluetooth icon in the upper left corner of the APP to bring up a menu. Select the USB tester model (e.g., "DL24-BLE") and return to the main APP interface.
3. During measurement, the upper right corner shows the currently online model. The Bluetooth icon in the upper left corner turns blue, indicating successful online communication.

For Computer Bluetooth Connection: Add the Bluetooth device to the serial port device of DT24-SPP on the computer. Scan the QR code on the host to download and store the APP software. Open the software without installing, select the added Bluetooth serial port model, and use it online.

Product List

• 2.4 inch DC color screen voltmeter X1pcs
• Crocodile clip red black male and female X2 set
• 2.54MM terminal temperature probe X1pcs

Product Wiring Method

The diagram shows the wiring for connecting the battery, the tester, and the load. The tester requires an independent DC 5-24V power supply.

DT24P Two Power Supply Methods

The DT24P can be powered via two methods:

1. Micro USB 5V power supply.
2. DC 2PIN independent 5-24V power supply.

The diagrams illustrate these connections. It is noted that if the power supply is not connected, the meter will not display.

User Manual Details

Important Statement: The meter does not display battery capacity immediately. After receiving the product, the battery must be fully charged. Connect the meter and long-press the "+" and "-" buttons simultaneously to reset the capacity to zero. The cumulative measurement of capacity when the battery is depleted through this meter represents the battery's storage capacity. Users should consult the instructions or contact manufacturer technicians for assistance.

This manual applies to 100A/200A/300A/400A/500A/600A/1000A models. The equipment measures and displays voltage, current, power, analog load resistance, discharge capacity, electricity quantity, battery temperature, over-voltage, low-voltage, and over-power prompts, as well as battery voltage percentage. For more details, visit http://en.atorch.cn.

Wiring Instructions (8~240V/0~240V with 9V independent power supply): The diagram shows a battery pack or power supply connected to the tester via a bidirectional current sampler. The sampler connects to the negative circuit of the battery pack (B- to B- on sampler, and P- to P-/C-). The positive terminal (B+) connects to the sampler's B+. The diagram also shows an optional relay interface for cut-off functions, requiring a 9-12V independent power supply for the relay. An independent power supply is necessary if the test voltage is below 8V. The battery temperature probe should be attached to the battery surface. The data cable can be extended as needed.

Main Interface and Button Operation: The main interface displays Voltage, Current, Power, Resistance, Electricity, Capacity, Run Time, and Battery Temperature. Key buttons include:

• Keys "+" / "-": Short press to switch screens; long press "+" or "-" while holding the capacity button to clear capacity.
• Setting Key/Menu Key ("M"): Long press to enter background settings; short press in the background to switch menu columns.
• Keys "+" / "-": Short press to switch forward screen; long press "+" or "-" while holding the capacity button to clear capacity.
• Keys "ON/OFF": Long press to bring up the shutdown and reset interface. Short press to switch menu columns and execute menu items.

Test Method for Output Voltage, Maximum Current, and Maximum Power of DC Power Supply: Connect the meter's input to the DC power supply output. The screen will show the voltage. Connect the meter's output to the load. The current and power values will be displayed. To find maximum current/power, adjust the load to cause a sharp voltage drop. For testing rated current/power and quality, adjust the load to the rated values and age for 4-8 hours. Qualified if stable voltage and normal temperature are maintained.

Use of System Shutdown and Current Reset Interface: Long-press the "ON/OFF" key to enter the background, then short-press "M", and then long-press to select options:

1. No Load Current Clearing: Press and hold to set current to "0A" when no load is present.
2. System Shutdown: For long periods of non-use to prevent power loss.
3. System Reset: Restores factory defaults (clears accumulated data). Operate with caution.
4. Exit: Return to the main measurement interface.

Steps for Connecting Mobile APP via Bluetooth: Ensure mobile Bluetooth, location, and storage permissions are enabled. Search for "E_test" (Apple) or scan QR code (Android) to download and install the app. Open the app, click the Bluetooth icon, select the "DT24PW-BLE" model. The host's Bluetooth icon will turn blue upon successful connection, indicating data synchronization.

Warning: If the "DL24PW-BLE" model does not appear, enable storage and location permissions for the app in phone settings.

User Self-Calibration: In background settings, long-press "+" and "-" simultaneously to enter calibration mode. Use "M" to select the no-load current reset column, then use "+" or "-" to adjust the calibration coefficient to match a standard instrument's readings.

Panel Installation and Fixing Instructions: Dig a rectangular hole according to the installation size. Peel the adhesive tape on the back of the meter and press it firmly into the hole.