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Adjustable Electric Hot Plate with Microcomputer Digital Temperature Control
The outer casing is stamped from high-quality cold-rolled steel sheet with surface spray coating treatment. The working plate is machined from cast iron or stainless steel to prevent direct open flame heating. Featuring flameless operation, fast temperature rise and high safety reliability, this stainless steel hot plate is widely used for sample baking, drying and various thermal tests. It serves as an ideal laboratory instrument for biology, genetics, medical care, environmental protection, biochemical labs, analytical rooms, education and scientific research.
1. Product Features
- The heating element adopts special forming technology, no warping or deformation under high temperature.
- Working panel made of stainless steel with excellent corrosion resistance and uniform surface temperature.
- Equipped with high-precision intelligent digital temperature controller and advanced AI PID regulation algorithm. It causes no temperature overshoot and supports auto-tuning (AT), delivering high precision, safe and simple operation.
- Adopts PID fuzzy control technology. Advanced digital technology adjusts proportional, integral and differential parameters to form fuzzy control and eliminate inertial temperature errors.
- Different from traditional thermostats that only perform on-off control via thermocouple signals, PID fuzzy control effectively solves the problem of inertial temperature deviation.
2. Main Technical Specifications (ET-4030)
- Temperature Range: Room Temperature ~ 350°C
- Heating Power: 2100W
- Temperature Control Accuracy: ±1~2%°C
- Working Size: 400×300 mm
- Overall Dimension: 400×300×160 mm
- Power Supply: 220V 50Hz ±10% | Packaging: 1 unit per carton
3. Complete Model Specifications (Dual Digital Display)
| Model | Working Voltage | Max Power | Temperature Range | Control Accuracy | Heating Plate Size (mm) | Overall Size (mm) | Net Weight |
|---|---|---|---|---|---|---|---|
| ET-100 | 220V AC (50/60Hz) | 400W | RT ~ 350°C | ±1°C | 100×100×20 | 200×200×150 | 3.5Kg |
| ET-150 | 220V AC (50/60Hz) | 600W | RT ~ 350°C | ±1°C | 150×150×20 | 200×200×150 | 3.5Kg |
| ET-200 | 220V AC (50/60Hz) | 800W | RT ~ 350°C | ±1°C | 200×200×20 | 200×200×150 | 4.5Kg |
| ET-3020 | 220V AC (50/60Hz) | 1200W | RT ~ 350°C | ±1-2%°C | 300×200×20 | 300×200×150 | 6Kg |
| ET-360 | 220V AC (50/60Hz) | 1500W | RT ~ 350°C | ±1-2%°C | 360×250×20 | 360×250×150 | 7.5Kg |
| ET-400 | 220V AC (50/60Hz) | 1800W | RT ~ 350°C | ±1-2%°C | 400×300×20 | 400×300×150 | 10Kg |
| ET-6040 | 220V AC (50/60Hz) | 3200W | RT ~ 300°C | ±1-2°C | 600×400×20 | 600×400×150 | 20Kg |
| ET-8040F | 220V AC (50/60Hz) | 3600W | RT ~ 300°C | ±1-3%°C | 800×400×20 | 800×400×75 | 30Kg |
| ET-13015F | 220V AC (50/60Hz) | 2300W | RT ~ 280°C | ±1-3%°C | 1300×150×20 | 1300×150×120 | 18Kg |
| ET-13020F | 220V AC (50/60Hz) | 3400W | RT ~ 280°C | ±1-3%°C | 1300×200×20 | 1300×200×120 | 25Kg |
| ET-13030F | 220V AC (50/60Hz) | 4600W | RT ~ 280°C | ±3-5%°C | 1300×300×20 | 1300×300×120 | 40Kg |
4. Operation Instructions
4.1 Temperature Setting
Press the SET key to enter temperature setting mode. The lower digital tube flashes while the upper one displays real-time temperature. Press ▲ to increase value and ▼ to decrease value; hold the key for fast adjustment. Press SET again to confirm and return to normal operation.
4.2 Sensor Error Calibration
Press and hold SET for 3 seconds to enter the hidden menu. Select parameter Sc and adjust the value via ▲ / ▼. Calibration range: -50°C ~ +50°C. Press and hold SET for 3 seconds again to exit. Factory default calibration value is 0. Do not adjust if the reading is accurate.
4.3 Auto-Tuning Activation
Enable auto-tuning only when temperature control performance is unsatisfactory. Press and hold SET for 3 seconds to enter hidden menu, select parameter At and turn on auto-tuning. The AT indicator flashes during the process. The system fluctuates twice around the set temperature. Auto-tuning finishes when the light goes out, and new PID parameters will be saved automatically.
5. Usage & Safety Precautions
- Clean the working surface thoroughly before use. No water droplets, dirt or foreign residues are allowed.
- Connect power supply and turn on the switch. Set target temperature and the hot plate starts working.
- Assign dedicated personnel to supervise during operation.
- Turn off the switch and cut off power after use, then wipe up any overflow substances.
- Do not place flammable and explosive materials on the surface before it cools down completely.
6. Function & Technical Principle
Traditional heating elements such as heating rods and coils are made of heating wires, whose internal temperature can exceed 1000°C during operation. For equipment working within 0~400°C, even if the thermostat cuts off power, residual heat will cause the sample temperature to keep rising, resulting in obvious inertial temperature error. The temperature will then drop continuously before reheating starts, affecting control accuracy.
PID fuzzy control is designed to solve this problem. It adopts advanced digital technology to adjust Proportional, Integral and Differential parameters, effectively eliminating inertial temperature deviation.
Many users choose voltage regulators instead of thermostats for high-precision scenarios, but manual regulation cannot adapt to changing environmental conditions and multiple temperature control points. In contrast, PID fuzzy control realizes fully automatic and stable temperature regulation. Its proportional parameter can automatically increase power output along with higher operating speed, which perfectly matches the working requirements of equipment such as hot stamping machines and guarantees product quality.
