ITECH IT-M7722L Programmable AC Power Supply User Manual

1. Safety Instructions

Please read and understand all safety instructions before operating the ITECH IT-M7722L Programmable AC Power Supply. Failure to follow these instructions may result in electric shock, fire, or damage to the product.

• Grounding: Ensure the power supply is properly grounded to prevent electric shock.
• Power Source: Connect the unit only to a power source with the specified voltage and frequency.
• Ventilation: Do not block ventilation openings. Adequate airflow is essential to prevent overheating.
• Environment: Operate the device in a dry, well-ventilated area, away from flammable materials, moisture, and extreme temperatures.
• Servicing: Refer all servicing to qualified service personnel. Do not attempt to open or repair the unit yourself.
• Emergency Shutdown: Familiarize yourself with the location of the power switch for immediate shutdown in case of an emergency.

2. Product Overview

The ITECH IT-M7722L is a compact, high-performance programmable AC power supply designed for laboratory and industrial applications. It offers precise control over AC and DC output, along with advanced measurement capabilities.

Figure 2.1: Front view of the ITECH IT-M7722L Programmable AC Power Supply, showing the display, control buttons, and rotary encoder.

Key Features:

• Compact Design: 1U Half-Rack size, weighing approximately 10 lbs, making it portable and suitable for bench testing or system integration.
• Versatile Output Modes: Supports AC, DC, and AC+DC output modes, expanding its application range for various testing requirements, including DC offset elements.
• Built-in AC Power Meter: Accurately measures and displays 12 parameters, including RMS voltage, RMS current, output frequency, active power, and power factor, eliminating the need for an external power meter.
• Comprehensive Protection: Includes Over Voltage Protection (OVP rms, OVP peak), Under Voltage Protection (UVP rms), Over Current Protection (OCP rms, OCP peak, OCP delay), Over Power Protection (OPP), Over Temperature Protection (OTP), and smart fan dysfunctional protection.
• High Resolution and Accuracy: Offers precise control with 0.1V/10mA resolution and high accuracy for reliable test results.
• Multiple Interfaces: Optional RS232, CAN, LAN, GPIB, USB, and external analog interfaces for remote control and automation.

Figure 2.2: The IT-M7700 series integrates the functionalities of a DC power supply, AC power supply, power meter, and waveform generator into a single unit.

3. Setup

3.1 Unpacking and Inspection

Carefully unpack the IT-M7722L power supply and its accessories. Verify that all items listed in the package contents are present:

• IT-M7722L Lab AC Power Supply
• Power Cord
• Ex-Factory Test Report

Inspect the unit for any signs of physical damage. If any damage is found or items are missing, contact your supplier immediately.

3.2 Physical Installation

The IT-M7722L features a 1U Half-Rack design, allowing for flexible installation.

• Benchtop Use: Place the unit on a stable, level surface, ensuring adequate space around the unit for ventilation.
• Rack Mounting: For rack integration, use appropriate rack mounting kits (sold separately) to secure the unit in a standard 19-inch rack. Ensure proper airflow within the rack.

Figure 3.1: Physical dimensions of the IT-M7722L, illustrating its compact 1U Half-Rack form factor.

3.3 Power Connection

Connect the provided power cord to the AC input receptacle on the rear panel of the power supply and then to a grounded AC power outlet. Ensure the power source matches the voltage requirements specified on the unit's label.

4. Operating Instructions

4.1 Powering On/Off

• Power On: Press the 'Power' button located on the front panel. The display will illuminate, indicating the unit is active.
• Power Off: Press and hold the 'Power' button until the display turns off.

4.2 Setting Output Parameters

Use the front panel controls to set voltage, current, and frequency.

1. Press the V-set button to enter voltage setting mode. Use the rotary encoder to adjust the voltage value.
2. Press the I-set button to enter current setting mode. Use the rotary encoder to adjust the current value.
3. Press the F-set button to enter frequency setting mode. Use the rotary encoder to adjust the frequency value.
4. Press Enter to confirm settings or Esc to cancel.

4.3 Selecting Output Modes (AC, DC, AC+DC)

The IT-M7722L supports multiple output modes:

• Press the AC button for pure AC output.
• Press the DC button for pure DC output.
• Press the AC+DC button for combined AC and DC output.

Figure 4.1: Examples of AC, DC, and AC+DC output waveforms, demonstrating the versatility of the power supply.

4.4 Using the Built-in AC Power Meter

The integrated power meter automatically displays key electrical parameters on the screen. To view specific parameters or cycle through display modes:

• Use the Display button to cycle through various measurement parameters such as RMS voltage, RMS current, output frequency, active power, and power factor.
• The display provides real-time readings, eliminating the need for external measurement devices.

4.5 Output On/Off

After setting the desired parameters, press the On/Off button to enable or disable the output to the load.

5. Maintenance

5.1 Cleaning

To maintain optimal performance and longevity, keep the unit clean.

• Wipe the exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Ensure no liquids enter the unit.

5.2 Ventilation and Fan Maintenance

The IT-M7722L relies on proper ventilation to prevent overheating. Regularly check that the air intake and exhaust vents are clear of dust and obstructions.

• The unit features smart fan dysfunctional protection. If a fan issue is detected, the unit may display an error or shut down to prevent damage.
• Do not attempt to open the unit to clean internal components. Refer to qualified service personnel if internal cleaning is required.

6. Troubleshooting

This section provides solutions to common issues. For problems not covered here, contact ITECH support.

6.1 Protection Features

The IT-M7722L incorporates comprehensive protection mechanisms to safeguard the unit and connected devices. If a protection event occurs, the output will be disabled, and an error message may be displayed.

Figure 6.1: Visual representation of the various protection features: OVP, UVP, OCP, OPP, and OTP.

• OVP (Over Voltage Protection): Protects against excessive output voltage.
• UVP (Under Voltage Protection): Protects against output voltage dropping below a set threshold.
• OCP (Over Current Protection): Protects against excessive output current.
• OPP (Over Power Protection): Protects against excessive output power.
• OTP (Over Temperature Protection): Shuts down the unit if internal temperature exceeds safe limits.

To clear a protection fault, identify and resolve the underlying issue, then cycle the output power or restart the unit if necessary.

7. Specifications

Detailed technical specifications for the ITECH IT-M7722L Programmable AC Power Supply.

8. Warranty and Support

8.1 Warranty Information

The ITECH IT-M7722L comes with an Ex-Factory Test Report, confirming its quality and performance at the time of manufacture. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact ITECH directly.

8.2 Technical Support

For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact ITECH customer support. You can find contact information on the official ITECH website or through your local distributor.

Visit the ITECH Store on Amazon for more product information and support resources.