ITECH IT6721 Variable DC Power Supply User Manual

1. Introduction and Overview

This manual provides essential information for the safe and efficient operation of the ITECH IT6721 Variable DC Power Supply. The IT6721 is a digital-control lab bench power supply offering adjustable voltage and current outputs, designed for a wide range of applications in electronics, research, and education.

Figure 1: ITECH IT6721 Variable DC Power Supply

Key Features:

• Digital Control: Output Voltage: 0~60V, Output Current: 0~8A, Power: 0~180W. Resolution: 0.01V/0.001A.
• CC/CV Automatic Conversion: Seamless switching between constant voltage and constant current modes.
• High Reliability Protection: Equipped with Over Current Protection (OCP), Over Voltage Protection (OVP), and Over Temperature Protection (OTP).
• Wide Application Range: Suitable for various testing needs, providing flexible Volt/Amp combinations within rated power.
• Memory Function: Allows saving and recalling frequently used settings.

Applications:

• Aging test of power modules, display boards, DC contacts, and fuses.
• Various consumer electronics testing.
• Low-power battery charging tests.
• Auxiliary power supply (12V/24V or 48V).
• Electronic water pump/fuel pump and other low power product tests.
• Suitable for university laboratories, testing, and certification authorities.

Figure 2: Overview of typical applications for the ITECH IT6721

2. Safety Information

Please read and understand all safety instructions before operating the device. Failure to comply with these instructions may result in electric shock, fire, or damage to the product.

• Always connect the power supply to a grounded outlet.
• Do not operate in wet or damp conditions.
• Ensure proper ventilation to prevent overheating. Do not block air vents.
• Do not open the casing; there are no user-serviceable parts inside. Refer servicing to qualified personnel.
• Verify input voltage settings (110V/220V) match your local power supply before connecting.
• Use only the specified power cord and accessories.
• Disconnect power before making any connections or disconnections to the output terminals.

3. Package Contents

Upon unpacking, please verify that all items listed below are present and undamaged:

• ITECH IT6721 Bench Power Supply x 1
• Power Cord x 1
• Ex-factory Test Report x 1

If any items are missing or damaged, please contact ITECH customer support immediately.

4. Component Identification

Front Panel:

Figure 3: Front Panel Layout

1. CC/CV Indicator: Lights up to indicate Constant Current (CC) or Constant Voltage (CV) mode.
2. OCP/OVP Indicator: Lights up when Over Current Protection or Over Voltage Protection is active.
3. Memory Save Buttons (A, B, C, D): Used to save and recall settings.
4. Keyboard Lock Button: Locks the front panel controls to prevent accidental changes.
5. Output ON/OFF Button: Toggles the power output.
6. Voltage/Current Adjust Knob: Rotary encoder for adjusting voltage and current values.
7. Display Switch Button: Cycles through different display modes or parameters.
8. Air Flow Input: Vents for cooling air intake.
9. Power ON/OFF Switch: Main power switch for the unit.
10. Output Terminals (+, -, Ground): Connectors for positive, negative, and ground output.

Rear Panel:

Figure 4: Rear Panel Layout

1. Power Switch (Voltage Selector): Used to select between 110V and 220V input voltage. Ensure this matches your local power supply before connecting.
2. AC Power Input: Connector for the main AC power cord.
3. 9-pin Connector: For factory use only.
4. Cooling Fan: Provides active cooling for the internal components.

5. Setup

1. Unpacking: Carefully remove the power supply from its packaging and inspect for any signs of damage.
2. Placement: Place the unit on a stable, level surface with adequate ventilation. Ensure that the front and rear air vents are not obstructed.
3. Voltage Selection: On the rear panel, verify that the power switch (voltage selector) is set to the correct voltage for your region (110V or 220V).
4. Power Connection: Connect the provided power cord to the AC power input on the rear panel and then to a grounded wall outlet.
5. Initial Power On: Flip the main power ON/OFF switch on the front panel to the 'ON' position. The display should illuminate.

6. Operating Instructions

This section details the basic operation of the ITECH IT6721 power supply.

Basic Operation Overview:

Setting Voltage and Current:

1. Ensure the output is OFF (Output ON/OFF button is not illuminated).
2. Use the Voltage/Current Adjust Knob to set the desired voltage. Press the knob to switch between coarse and fine adjustment modes.
3. Press the Shift button and then the Voltage/Current Adjust Knob to switch to current setting mode. Adjust the current limit using the knob.
4. The display will show the set voltage and current values.

Figure 5: Adjust Step Value for Voltage and Current

Output Control:

• After setting the desired voltage and current, press the Output ON/OFF button to enable the output. The button will illuminate.
• To disable the output, press the Output ON/OFF button again.

Memory Function:

The power supply allows you to save and recall up to four sets of voltage and current settings.

1. Saving Settings: Set the desired voltage and current. Press and hold one of the Memory Save buttons (A, B, C, or D) until the display indicates the setting is saved.
2. Recalling Settings: Briefly press the corresponding Memory Save button (A, B, C, or D) to recall the saved settings.

Keyboard Lock:

To prevent accidental changes to settings during operation, you can lock the front panel controls.

• Press the Keyboard Lock button to activate or deactivate the lock function. A lock icon may appear on the display when active.

Figure 6: Keyboard Lock Feature

Software Control:

The ITECH IT6721 can be controlled via software for advanced applications and data logging.

Figure 7: Power Supply with Free Software Interface

Refer to the separate software manual for detailed instructions on installation and usage.

7. Maintenance

Proper maintenance ensures the longevity and reliable operation of your power supply.

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners or solvents.
• Ventilation: Regularly check that the air vents are clear of dust and debris to ensure proper cooling.
• Storage: When not in use for extended periods, store the power supply in a cool, dry environment, away from direct sunlight and extreme temperatures.
• Calibration: Periodic calibration by qualified personnel is recommended to maintain measurement accuracy.

8. Troubleshooting

This section provides solutions to common issues you might encounter.

If the problem persists after attempting these solutions, please contact technical support.

9. Specifications

Detailed technical specifications for the ITECH IT6721 Variable DC Power Supply.

Figure 8: Product Dimensions

Figure 9: Standard Size for 19" Rack Mount (multiple units shown)

10. Warranty and Support

ITECH provides professional technical support for its products.

• For technical assistance, product inquiries, or warranty claims, please contact our technical support team.
• Email: fae@itech.sh

Please have your product model and serial number ready when contacting support.