KKnoon 150W 20A Adjustable Constant Current Electronic Load User Manual

1. Produktas baigtasview

The KKnoon 150W 20A Adjustable Constant Current Electronic Load is a versatile direct current (DC) electronic load device designed for testing power supplies, batteries, and other DC sources. It features a 2.4-inch TFT color display for real-time monitoring of various parameters and supports four distinct working modes. This manual provides detailed instructions for its setup, operation, and maintenance.

Figure 1: KKnoon 150W 20A Electronic Load with included accessories.

2. Saugos informacija

• Ensure the device is powered by a 12VDC, 1A power adapter.
• Do not exceed the maximum load voltage of 150VDC, load current of 20A, or load power of 150W (max. 60W above 120V).
• Always connect the load correctly using the four-wire system for accurate measurements.
• Avoid touching internal components when the device is powered on.
• Operate in a well-ventilated area to prevent overheating.

3. Pakuotės turinys

Patikrinkite, ar pakuotėje yra visi reikalingi daiktai:

• 1 x Electronic Load Unit
• 1 x 12VDC Power Adapter
• 1 x NTC Temperature Sensor

4. Įrenginio išdėstymas ir jungtys

Familiarize yourself with the main components and connection points of the electronic load.

Figure 2: Key components of the Electronic Load.

1. Operating Power Supply DC Interface: Connect the provided 12VDC, 1A power adapter here.
2. Aušinimo ventiliatorius: Automatically activates when internal temperature reaches ≥40°C or current exceeds 3A.
3. Valdymo klavišai: Used for navigation, setting parameters, and turning the load ON/OFF.
4. 2.4 colių ekranas: TFT color screen showing all operational parameters and settings.
5. Input 4P Terminal Block: For connecting the device under test (DUT). Supports four-wire (A+, V+, V-, A-) and two-wire systems.

3 pav. Išsamus view of the four-wire terminal block and NTC sensor interface.

5. Sąranka ir laidai

Proper wiring is crucial for accurate measurements and safe operation.

5.1 Įrenginio maitinimas

• Connect the provided 12VDC, 1A power adapter to the DC input jack (1) on the electronic load.
• Plug the adapter into a suitable power outlet. The display should illuminate.

5.2 Connecting the Load (Device Under Test)

The electronic load supports both four-wire and two-wire connection methods. The four-wire method provides more accurate voltage measurement by separating the voltage sensing lines from the current carrying lines.

Figure 4: Wiring diagrams for four-wire and two-wire connections.

• Four-Wire System: Connect the positive terminal of the DUT to A+ and the negative terminal to A- for current flow. Additionally, connect a separate pair of wires from the positive terminal of the DUT to V+ and the negative terminal to V- už ttage sensing. This method compensates for voltage drop across the current wires.
• Two-Wire System (Downward Compatible): Connect the positive terminal of the DUT to A+ and the negative terminal to A-. In this configuration, the V+ and V- terminals are internally shorted to A+ and A- respectively. Note that voltage readings may be slightly less accurate due to voltage drop in the current wires.

5.3 Connecting the NTC Temperature Sensor

• Plug the NTC 3950 10K 1% temperature sensor into the dedicated NTC interface next to the 4P terminal block (refer to Figure 3).
• Place the sensor in contact with the component or area whose temperature you wish to monitor (e.g., battery surface). The device will display temperatures from 0-100°C.

6. Naudojimo instrukcijos

The electronic load features a 2.4-inch TFT color display and control buttons for easy operation.

Figure 5: Control buttons for operation.

6.1 Ekranas baigtasview

The 2.4-inch TFT color screen displays real-time values for:

• ttage (V)
• Dabartinė (A)
• Galia (W)
• Cumulative Energy (Wh)
• Cumulative Capacity (Ah)
• Internal Resistance (Ω)
• Load Status (ON/OFF)
• Operating Mode (CC, CV, CP, CR)
• Protection Status (OVP, OCP, OPP)
• Sustabdyti garsumątage
• Time Limit Discharge
• External Temperature (if NTC sensor connected)

6.2 Valdymo mygtukai

• ĮJUNGTA/IŠJUNGTA: Toggles the electronic load ON or OFF.
• '-' (Minus): Decreases parameter values or navigates menu options.
• '+' (Plus): Increases parameter values or navigates menu options.
• NUSTATYTI: Enters parameter setting mode, confirms selections, or switches between display pages.

6.3 Darbo režimai

The device supports four primary working modes:

1. CC (Constant Current) Mode: Maintains a constant discharge current regardless of voltage changes. Ideal for battery capacity testing.
2. CV (Constant Voltage) Mode: Palaiko pastovų tūrįtage across the load.
3. CP (Constant Power) Mode: Maintains a constant power dissipation.
4. CR (Constant Resistance) Mode: Maintains a constant resistance.

Norėdami pasirinkti darbo režimą:

1. Paspauskite NUSTATYTI button to enter the main menu or parameter setting interface.
2. Naudokite „+“ or '-' buttons to navigate to the 'Mode' option.
3. Paspauskite NUSTATYTI , kad pasirinktumėte, tada naudokite „+“ or '-' to choose the desired mode (CC, CV, CP, CR).
4. Paspauskite NUSTATYTI again to confirm the mode selection.

6.4 Parametrų nustatymas

After selecting a working mode, you can set its specific parameters (e.g., target current for CC mode, target voltage for CV mode).

1. In the desired working mode, press NUSTATYTI to highlight the parameter you wish to adjust.
2. Naudokite „+“ or '-' to change the value. A long press may accelerate value changes.
3. Paspauskite NUSTATYTI again to confirm the value and move to the next parameter or exit setting mode.

6.5 Apsaugos nustatymai

The device includes several protection features to prevent damage to the DUT or the electronic load itself.

• Overvoltage apsauga (OVP): Supports up to 150V. Set the maximum allowable input voltage.
• Apsauga nuo viršsrovių (OCP): Supports up to 20A. Set the maximum allowable current draw.
• Over-power Protection (OPP): Supports up to 150W. Set the maximum allowable power dissipation.
• Ribotas tomastage Discharge (Low Voltage apsauga): Allows setting a minimum discharge voltage. If the DUT voltage drops below this threshold, the load will stop. Default is unlimited; set according to your needs.
• Time Limit Discharge: Supports discharge duration up to 99 hours and 59 minutes. The load will stop automatically after the set time.

To set protection parameters, navigate through the menu using the NUSTATYTI, „+“, ir '-' mygtukai.

6.6 Kiti nustatymai

• Chinese and English Interface Switching: Supported. Navigate to the language setting in the menu.
• Zeroing of Total Data: Resets cumulative energy (Wh) and capacity (Ah) measurements.
• ttage and Current No-Load Nulling: Calibrates the zero point for voltage and current readings when no load is connected.
• ttage Open Calibration: Allows for fine-tuning voltage matavimo tikslumas.
• Current Open Calibration: Allows for fine-tuning current measurement accuracy.
• Ekrano ryškumo reguliavimas: Adjust display brightness for optimal visibility.
• Screen Hibernation Standby Setting: Configures display standby behavior.
• Atkurti gamyklinius nustatymus: Resets all parameters to their default values.

7. Priežiūra

• Laikykite įrenginį švarų ir be dulkių. Valymui naudokite minkštą, sausą šluostę.
• Ensure proper ventilation around the device, especially the cooling fan, to prevent overheating.
• Laikykite prietaisą sausoje vietoje, atokiau nuo tiesioginių saulės spindulių ir ekstremalių temperatūrų.
• Do not attempt to disassemble the device beyond what is necessary for sensor connection or cleaning, as this may void the warranty.

8. Problemų sprendimas

• Įrenginys neįsijungia: Check if the 12VDC power adapter is correctly connected and functioning. Ensure the power outlet is active.
• Nėra apkrovos srovės / voltage. skaitymas: Verify that the DUT is properly connected to the 4P terminal block (A+, A-, V+, V-). Ensure the DUT is powered on and supplying voltage. Check if the load is enabled (ON/OFF button).
• Load stops unexpectedly: Check if any protection (OVP, OCP, OPP, Low Voltage Protection, Time Limit Discharge) has been triggered. Adjust protection limits if necessary.
• Netikslūs rodmenys: Atlikti ttage and current open calibration. Ensure a four-wire connection is used for maximum accuracy.
• Cooling fan not running: The fan activates automatically when the internal temperature reaches ≥40°C or current exceeds 3A. If these conditions are met and the fan is still not running, contact support.

9. Specifikacijos

10. Garantija ir palaikymas

For warranty information and technical support, please refer to the retailer where the product was purchased or visit the official KKnoon websvetainėje. Išsaugokite pirkimo kvitą kaip pirkimo įrodymą.