1. Pengenalan
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of the Corning PC-420D Stirring Hot Plate. Please read this manual thoroughly before operating the device to ensure proper usage and to prevent injury or damage.
1.1 Langkah Keselamatan
- Always operate the hot plate on a stable, level, and heat-resistant surface.
- Ensure proper ventilation to dissipate heat and fumes.
- Do not touch the hot plate surface when the hot top indicator is illuminated or immediately after use, as it can remain hot for an extended period.
- Use appropriate personal protective equipment (PPE) such as heat-resistant gloves and eye protection.
- Jangan rendam unit ke dalam air atau cecair lain.
- Disconnect the power cord before cleaning or servicing the unit.
- Avoid spilling liquids onto the control panel or into the internal components. The two-piece casting design helps deflect spills, but caution is still advised.
- Pastikan bekalan kuasa memenuhi keperluan unit (100V, 60Hz).
2. Komponen dan Ciri Produk

Rajah 2.1: Depan view of the Corning PC-420D Stirring Hot Plate, showing the white Pyroceram top, gray base, two digital displays for RPM and temperature, and two control knobs.
The Corning PC-420D Stirring Hot Plate is designed for precise temperature control and stirring of various solutions. Key components and features include:
- Pyroceram Glass-Ceramic Top: A durable 5 x 7 inch (12.7 x 17.8cm) surface for heating samples.
- Digital LED Temperature Display: Shows the current and set temperature in 5°C increments.
- Digital LED Stirring Speed Display: Shows the current and set stirring speed in RPM.
- Tombol Kawalan Suhu: Digunakan untuk menetapkan suhu pemanasan yang dikehendaki.
- Stirring Speed Control Knob: Used to set the desired stirring speed.
- Hot Top Indicator: A bright LED icon that illuminates when the top plate temperature exceeds 60°C, even when the unit is turned off.
- Built-in Support Rod Mount: Allows for the attachment of an optional 18-inch (45.7cm) support rod.
- Spill Deflection Design: A two-piece casting design that helps direct spills away from internal electronics.
- Perlindungan Terlalu Panas: A separate temperature sensor provides power cutoff if the unit overheats.
3. Persediaan dan Pemasangan
- Membongkar: Carefully remove the hot plate from its packaging. Inspect the unit for any signs of damage incurred during shipping. Retain packaging materials for future transport or storage.
- penempatan: Place the hot plate on a stable, level, and non-flammable surface. Ensure there is adequate clearance around the unit for ventilation. Avoid placing it near flammable materials or in areas with excessive moisture.
- Sambungan Kuasa: Connect the standard US three-prong plug to a grounded 100V, 60Hz electrical outlet. Verify that the power supply matches the unit's requirements to prevent damage.
- Optional Support Rod Installation: If using a support rod (available separately), insert it into the built-in mount located at the rear of the unit and secure it.
4. Arahan Operasi
4.1 Menghidupkan/Mematikan
Once connected to power, the unit is ready for operation. The hot top indicator will illuminate if the surface temperature is above 60°C, even when the unit is off.
4.2 Kawalan Suhu
- Turn the temperature control knob clockwise to increase the desired temperature. The digital LED display will show the set temperature.
- The temperature can be set from 5°C (if ambient temperature is 0°C or lower) up to 550°C, in 5°C increments.
- The digital LED temperature display will blink until the set temperature is reached, indicating that the heating element is actively working to achieve the target temperature.
- For precise temperature control within the vessel, an optional external temperature controller can be connected (sold separately). This bypasses the need for constant monitoring of liquid temperature.
- Always observe the hot top indicator. It remains lit as long as the plate temperature is above 60°C, serving as a safety warning.
4.3 Stirring Control
- Place a suitable stir bar into the vessel containing the solution to be stirred.
- Place the vessel centrally on the Pyroceram top.
- Turn the stirring speed control knob clockwise to increase the stirring speed. The digital LED display will show the set RPM.
- The stirring speed can be adjusted from 60 RPM to 1150 RPM.
- The exclusive closed-loop stirring control monitors and regulates the stirring speed, ensuring consistent and repeatable performance for aqueous, viscous, or semi-solid solutions.
- The unit features a stronger, larger magnet and automatic ramp-up speed adjustment to minimize stir bar decoupling, especially when starting or changing speeds.
5. Penyelenggaraan dan Penjagaan
- Pembersihan: Always disconnect the unit from the power supply before cleaning. Allow the hot plate to cool completely. Wipe the Pyroceram top and the exterior surfaces with a damp cloth and mild detergent. Do not use abrasive cleaners or solvents that could damage the surface.
- Tumpahan: The two-piece casting design is intended to deflect spills away from the electronics. In case of a spill, immediately disconnect power, allow the unit to cool, and clean thoroughly.
- Storan: Store the hot plate in a clean, dry environment when not in use.
- Pemeriksaan: Periodically inspect the power cord for any signs of damage. If the cord is damaged, it must be replaced by qualified personnel.
6. Penyelesaian masalah
| Masalah | Kemungkinan Punca | Penyelesaian |
|---|---|---|
| Unit tidak dihidupkan. | No power supply; faulty power cord; internal fuse. | Check power outlet and cord connection. Ensure power switch is on. If problem persists, contact qualified service personnel. |
| Temperature not reaching set point or fluctuating. | Improper vessel placement; external factors (drafts); sensor issue. | Ensure vessel is centered. Minimize drafts. Consider using an external temperature controller for precise liquid temperature. |
| Stir bar decouples or does not spin. | Incorrect stir bar size; too viscous solution; vessel not centered; excessive speed change. | Use appropriate stir bar size. Reduce viscosity if possible. Center the vessel. Increase speed gradually. |
| Hot top indicator remains off despite high temperature. | Kerosakan lampu penunjuk. | Assume surface is hot regardless of indicator. Contact service for repair. |
| Unit ditutup tanpa diduga. | Perlindungan terlalu panas diaktifkan. | Allow unit to cool down. Ensure proper ventilation. If frequent, contact service. |
If you encounter problems not listed here or if the suggested solutions do not resolve the issue, please contact Corning customer support.
7. Spesifikasi
| Nombor Model | 6797-420D (PC-420D) |
| Bahan Plat Atas | Pyroceram Glass-Ceramic |
| Saiz Plat Atas | 4.25 x 7.55 x 11 Inches (10.8 x 19.7 x 28cm) |
| Julat Suhu | 5°C (if ambient is 0°C or lower) to 550°C |
| Kenaikan Suhu | 5°C |
| Stirring Speed Range | 60 hingga 1150 RPM |
| Keperluan Kuasa | 100V, 60Hz |
| Amppemadam | 6.3 A |
| Watt | 623 W |
| Dimensi Produk (L x W x H) | 4.25 x 7.55 x 11 Inches (10.8 x 19.7 x 28cm) |
| Berat badan | 3.2 kg (7.05 paun) |
8. Maklumat Waranti
For detailed warranty information regarding your Corning PC-420D Stirring Hot Plate, please refer to the warranty card included with your product packaging or visit the official Corning webtapak. Simpan bukti pembelian anda untuk tuntutan waranti.
9. Sokongan Pelanggan
If you have any questions, require technical assistance, or need to order replacement parts, please contact Corning customer support. Contact details can typically be found on the official Corning webtapak atau pada pembungkusan produk anda.
Pengeluar: Corning
Webtapak: www.corning.com