1. Вступ
Thank you for choosing the S7 TIG-250P 250A TIG Welder with Pulse. This versatile 110V/220V TIG/ARC Welding Machine features HF Start and 2T/4T modes, making it ideal for welding aluminum, stainless steel, and various metal fabrication tasks. This manual provides essential information for safe and effective operation, setup, and maintenance of your new welding machine.
The S7 TIG-250P is designed for both hobbyists and professionals, offering precise control for various welding applications. Its portable inverter design ensures flexibility for use in garages, workshops, and job sites.

Figure 1.1: The S7 TIG-250P 250A TIG Welder and its complete set of accessories.
2. Інформація про безпеку
Always prioritize safety when operating welding equipment. Failure to follow safety guidelines can result in serious injury or death. Read and understand all warnings and instructions before use.
- Електрична безпека: Ensure proper grounding. Do not operate in wet conditions. Always use appropriate voltage (110V or 220V) as indicated.
- Небезпека випарів: Welding fumes can be hazardous. Work in a well-ventilated area or use a fume extractor.
- Промені дуги: Дугові промені можуть опікати очі та шкіру. Завжди одягайте зварювальну маску з відповідним захистом від світла, захисний одяг та рукавички.
- Пожежа та вибух: Keep flammable materials away from the welding area. Ensure a fire extinguisher is readily available.
- Автоматичний захист: The TIG-250P features automatic protection functions for over-current, over-voltage, and over-heating. If the machine shuts down, allow it to cool before resuming operation.
- Електромагнітні поля (ЕМП): Welding current creates electromagnetic fields. Consult a physician if you have a pacemaker or other medical implant.

Малюнок 2.1: Закінченоview of the S7 TIG-250P's built-in safety features, including protection against overheating, overload, and electrostatic discharge, along with its IP21 protection standard.
3. Вміст упаковки
Carefully unpack your S7 TIG-250P welder and verify that all items listed below are present and undamaged. If any items are missing or damaged, contact customer support immediately.
- S7 TIG-250P Welder Unit
- 13.2ft/4m WP-17 TIG Torch
- TIG Torch Consumables (collets, collet bodies, ceramic nozzles)
- Адаптер 220 В на 110 В
- 6ft/2m Ground Clamp
- 6ft/2m Electrode Holder

Figure 3.1: Visual representation of the S7 TIG-250P welder and its standard accessories, including the TIG torch, ground clamp, electrode holder, and power adapter.
4. Налаштування
Follow these steps to set up your S7 TIG-250P welder for operation.
4.1 Connecting the Cables and Gas
- Підключення живлення: Connect the power cable to a suitable 110V or 220V power outlet. Use the provided adapter if necessary. The machine automatically adapts to the input voltage.
- Наземний Clamp: Підключіть заземлення клamp cable to the appropriate output terminal on the front panel. For DC TIG welding (steel), connect to the negative terminal (-). For AC TIG welding (aluminum), connect to the positive terminal (+). Secure the ground clamp до заготовки.
- Пальник TIG: Connect the TIG torch cable to the corresponding terminal on the front panel. Ensure a secure connection.
- Підключення газу: Connect your inert gas supply (e.g., Argon) to the gas inlet on the rear of the machine. Ensure the gas hose is securely attached and leak-free.
- Electrode Holder (for ARC/Stick Welding): If performing ARC welding, connect the electrode holder cable to the appropriate terminal.

Малюнок 4.1: Детально view of the S7 TIG-250P's front and rear panels, highlighting connection points and controls for proper setup.
Відео 4.1: Короткий оглядview demonstrating the connection of cables and components to the S7 TIG-250P welding machine.
5. Інструкція з експлуатації
The S7 TIG-250P offers intuitive controls for various welding modes. Familiarize yourself with the control panel before beginning operation.
5.1 Панель керування надview
The front panel features a digital display, mode selection buttons, and an amperage adjustment knob. Indicators show active welding mode (TIG/ARC, DC/AC) and pulse settings.
5.2 Режими та налаштування зварювання
- Зварювання TIG: Select TIG mode. For aluminum, use AC (Alternating Current) and ensure the torch is connected to the positive terminal (DCEP). For stainless/carbon steel, use DC (Direct Current) and connect the torch to the negative terminal (DCEN).
- ARC/Stick Welding: Select ARC mode for stick welding.
- Імпульсна функція: The pulse function allows for precise heat input control, ideal for thinner materials and improved weld bead appearance. Adjust pulse frequency, base current, and pulse width as needed.
- Режими 2T/4T:
- 2T (Два дотики): Press and hold the torch trigger to start the arc; release to stop. Suitable for short welds.
- 4T (чотири дотики): Press and release the trigger to start the arc; press and release again to stop. Provides flexible, finger-free control for longer welding jobs.
- HF Start: High-frequency non-touch arc starting ensures clean arc initiation without contaminating the workpiece.
5.3 Recommended Settings (TIG Welding)
The following table provides general guidelines for TIG welding settings. Adjustments may be necessary based on material type, thickness, and desired weld characteristics. Always use green tungsten for welding aluminum.
| Товщина зварювання | Welding Tungsten | Поточне налаштування (A) | Argon Rate (L/min) |
|---|---|---|---|
| 1 мм (0.04 дюймів) | 1.6 мм (1/16 дюйма) | 25-30 | 8 XNUMX л |
| 2 мм (0.08 дюймів) | 2.4 мм (3/32 дюйма) | 35-60 | 10 XNUMX л |
| 3-4 мм (0.12-0.16 дюйм) | 3.2 мм (1/8 дюйма) | 65-100 | 12 XNUMX л |

Figure 5.1: The S7 TIG-250P is suitable for welding a wide range of materials, including aluminum, various steels, iron, and copper.
Video 5.1: Demonstration of the S7 TIG-250P welder in operation, showcasing its performance on various materials.
6. Технічне обслуговування
Regular maintenance ensures the longevity and optimal performance of your S7 TIG-250P welder. Always disconnect the power before performing any maintenance.
- Прибирання: Periodically clean the internal components using compressed air to remove dust and debris, especially from the cooling fan and vents.
- Перевірка кабелю: Inspect all cables, connections, and the TIG torch for wear, damage, or loose connections before each use. Replace damaged components immediately.
- Витратні матеріали: Regularly check and replace TIG torch consumables (tungsten, collets, collet bodies, ceramic nozzles) as they wear out to maintain weld quality.
- Зберігання: Store the welder in a clean, dry environment, protected from dust and moisture.
7. Вирішення проблем
If you encounter issues with your S7 TIG-250P welder, refer to the following common troubleshooting steps:
| проблема | Можлива причина | Рішення |
|---|---|---|
| Немає живлення | Вимкнено живлення, нещільно закріплений кабель живлення, спрацював автоматичний вимикач. | Ensure power switch is ON. Check power cable connection. Reset circuit breaker. |
| Немає дуги / Слабка дуга | Improper ground connection, incorrect amperage setting, worn tungsten/consumables, no gas flow (TIG). | Перевірте землю клamp connection to workpiece. Adjust amperage. Replace worn consumables. Verify gas supply and flow rate. |
| Індикатор перегріву увімкнено | Prolonged use, insufficient cooling. | Allow the machine to cool down. Ensure cooling vents are clear and fan is operating. Reduce duty cycle. |
| Погана якість зварювання | Incorrect settings, contaminated material, improper technique, wrong gas type/flow. | Налаштувати amperage, pulse, and 2T/4T settings. Clean workpiece thoroughly. Practice welding technique. Verify correct gas and flow. |
If the issue persists after attempting these steps, contact S7 customer support for further assistance.
8. Технічні характеристики
Key technical specifications for the S7 TIG-250P welder:
- модель: TIG-250P
- Вхідний об'ємtage: 110V/220V (Automatic Adaptation)
- Зварювальний струм: До 250А
- Режими зварювання: TIG (DC/AC with Pulse), ARC (Stick)
- Запуск дуги: High-Frequency (HF) Non-Touch
- Режими управління: 2T/4T
- Protection Standard: IP21
- Вага товару: Приблизно 17.96 фунта
- Розміри упаковки: Приблизно 17.5 x 13.5 x 11 дюйма
- Країна походження: Китай

Figure 8.1: Dimensions and power input details for the S7 TIG-250P welder.
9. Гарантія та підтримка
For warranty information, product support, or to purchase replacement parts and accessories, please contact S7 customer service. Refer to your purchase documentation for specific warranty terms and contact details.
You can also visit the official S7 store for more information and product offerings: S7 Official Store.