Introduction
The ITECH IT6720 is a high-performance digital-control variable DC power supply designed for a wide range of applications, from laboratory research to production line testing. It provides stable and precise voltage and current output with automatic constant current (CC) and constant voltage (CV) conversion modes. Equipped with multiple protection functions, this power supply ensures safe and reliable operation.
Figure 1: Front view of the ITECH IT6720 Variable DC Power Supply.
Product Overview
Front Panel Layout
Figure 2: Detailed view of the front panel, showing the CC/CV indicators, OCP/OVP indicators, memory save buttons, keyboard lock, voltage/current adjust knob, output ON/OFF button, and display switch button.
Rear Panel Layout
Figure 3: Detailed view of the rear panel, indicating the power switch, AC power input, 9-pin connector (for factory use only), and cooling fan.
Setup
- Power Connection: Connect the supplied power cord to the AC power input on the rear panel (Figure 3). Ensure the power switch is in the OFF position before connecting.
- Voltage Selection: Verify the voltage selector switch on the rear panel is set to the correct local AC voltage (110V or 220V). Adjust if necessary using a small flat-head screwdriver.
- Output Connections: Connect your load to the output terminals on the front panel. The red terminal is positive (+), the black terminal is negative (-), and the green terminal is ground. Ensure secure connections.
- Initial Power On: Flip the power switch on the rear panel to the ON position. The display on the front panel should illuminate.
Video 1: A brief demonstration of the ITECH IT6700 series DC power supply, including power-on and basic operation.
Operating Instructions
- Setting Voltage and Current: Use the large rotary knob to adjust the voltage and current values. Press the 'Shift' button to toggle between coarse and fine adjustment modes for precise control. The display will show the set values.
- Output ON/OFF: Press the 'On/off' button to enable or disable the output. The display will indicate if the output is active.
- CC/CV Automatic Conversion: The power supply automatically switches between Constant Voltage (CV) and Constant Current (CC) modes depending on the load. The corresponding indicator (CC or CV) on the display will light up.
- Protection Functions: The unit is equipped with Over Current Protection (OCP), Over Voltage Protection (OVP), and Over Temperature Protection (OTP). If any of these conditions are met, the output will shut down and the respective indicator will light up.
- Memory Functions: Use the 'Save' and 'Prog' buttons (A, B, C, D) to store and recall frequently used voltage and current settings. Refer to the detailed manual for specific programming steps.
- Keyboard Lock: The 'Lock' button can be used to prevent accidental changes to settings during operation.
Video 2: An overview of the IT6700 DC Power Supply's features, including its bright display, high resolution, and CV/CC modes.
Figure 4: The key lock feature helps prevent accidental changes to settings.
Figure 5: Table illustrating the different adjustment step values for voltage and current (e.g., 1V, 0.1V, 0.01V for voltage; 1A, 0.1A, 0.01A, 0.001A for current).
Maintenance
Fuse Replacement
The ITECH IT6720 power supply is equipped with a replaceable fuse for protection against overcurrent. If the unit fails to power on or experiences unexpected shutdowns, the fuse may need replacement. The fuse holder is located on the rear panel, near the AC power input.
- Disconnect Power: Ensure the power supply is completely disconnected from the AC mains before attempting any maintenance.
- Locate Fuse Holder: Identify the fuse holder on the rear panel (refer to Figure 3). It is typically a small, cylindrical cap that can be twisted or pulled out.
- Remove Old Fuse: Use a small flat-head screwdriver or your fingernail to gently pry open or twist the fuse holder cap. Carefully remove the old fuse.
- Check Fuse Rating: The required fuse rating is printed on the rear panel near the fuse holder. For 110V AC operation, the fuse is typically 3.15A/250V. For 220V AC operation, it is 1.5A/250V. Always replace with a fuse of the exact same type and rating.
- Insert New Fuse: Place the new fuse into the fuse holder cap and reinsert it into the power supply, ensuring it is securely seated.
- Reconnect Power: Reconnect the power supply to the AC mains and test its operation.
Note: If the fuse blows repeatedly, there may be an underlying issue with the unit or your electrical setup. Contact technical support for assistance.
Specifications
| Specification | Value |
|---|---|
| Output Voltage | 0-60V |
| Output Current | 0-5A |
| Power | 0-100W |
| Voltage Resolution | 0.01V |
| Current Resolution | 0.001A |
| Voltage Accuracy | <0.05%+10mV |
| Current Accuracy | <0.1%+2mA |
| Product Dimensions (L x W x H) | 11.1 x 6.9 x 3.5 inches |
| Item Weight | 7.7 pounds |
| Cooling Method | Air |
For a complete list of specifications, please refer to the official product documentation.
Figure 6: Product dimensions of the ITECH IT6720.
Figure 7: Power curve illustrating the voltage and current capabilities within the rated power.
Troubleshooting
- Unit does not power on:
1. Check if the power cord is securely connected to both the unit and the AC outlet.
2. Verify the power switch on the rear panel is in the ON position.
3. Inspect the fuse on the rear panel. If blown, replace it with a fuse of the correct rating (refer to Maintenance section). - No output voltage/current:
1. Ensure the output ON/OFF button on the front panel is enabled.
2. Check if any protection indicators (OCP, OVP, OTP) are lit. If so, resolve the overload/overvoltage/overtemperature condition and reset the unit.
3. Verify that the voltage and current settings are not set to zero. - Difficulty with user interface/modes:
The IT6720 uses a single control knob with multiple modes. Refer to the detailed user manual (PDF link provided in product documents) for a comprehensive explanation of each mode (Mode A, B, C, D) and how to navigate them using the 'Shift' and 'Setup' buttons. Practice adjusting values in different modes to become familiar with the interface.
Warranty and Support
ITECH provides professional technical support for its products both before and after sale. For any technical inquiries, operational assistance, or warranty claims, please contact ITECH customer service directly.
Refer to the official ITECH website or the documentation included with your product for the most up-to-date contact information and warranty details.
Figure 8: Contact information for ITECH Technical Team.
