Product Overview
The Corning PC-420D Stirring Hot Plate is a precision instrument designed for heating and stirring various liquids and solutions in laboratory environments. It features a durable Pyroceram top plate, digital displays for both stirring speed (RPM) and temperature (degrees Celsius), and intuitive control knobs for precise adjustments. This unit is suitable for a wide range of applications in chemistry, biology, and other scientific fields.
An overhead view of the Corning PC-420D Stirring Hot Plate. The unit features a white Pyroceram top plate, a grey base with two black control knobs (Stir and Heat), and two red LED digital displays for RPM and temperature. A power cord with a three-prong plug is visible on the right side.
Safety Information
Please read and understand all safety precautions before operating the Corning PC-420D Stirring Hot Plate. Failure to follow these instructions may result in injury or damage to the equipment.
- Electrical Safety: Ensure the unit is connected to a properly grounded 120V/60Hz power source. Do not operate with a damaged power cord or plug. Avoid spills near electrical components.
- Burn Hazard: The Pyroceram top plate can reach temperatures up to 550°C. Always use appropriate personal protective equipment (PPE), such as heat-resistant gloves. Allow the unit to cool completely before handling or cleaning. The "HOT TOP" indicator will illuminate when the surface is hot.
- Chemical Safety: Use caution when heating or stirring flammable or corrosive materials. Ensure adequate ventilation in the work area.
- Stable Placement: Always place the hot plate on a stable, level, and heat-resistant surface away from combustible materials.
- Supervision: Do not leave the hot plate unattended while in operation, especially when heating liquids.
- Ventilation: Ensure proper ventilation to dissipate heat and any fumes generated during operation.
Setup
- Unpacking: Carefully remove the hot plate from its packaging. Inspect the unit for any signs of damage during transit. Retain packaging for future storage or transport.
- Placement: Position the hot plate on a clean, stable, and level laboratory bench or work surface. Ensure there is sufficient clearance around the unit for ventilation and safe operation.
- Power Connection: Connect the three-prong power cord to a grounded 120V/60Hz electrical outlet. The unit is designed for U.S. power standards.
- Rod Mount Support: If using a support rod (sold separately), attach it to the built-in rod mount support on the rear of the unit.
Operating Instructions
The Corning PC-420D features intuitive controls for both heating and stirring functions.
Controls Overview:
- Power Indicator: An illuminated indicator light confirms the unit is powered on.
- Stir Knob: Located on the left, this knob controls the stirring speed. Turn clockwise to increase RPM. The digital display will show the set RPM.
- Heat Knob: Located on the right, this knob controls the heating temperature. Turn clockwise to increase temperature. The digital display will show the set temperature in degrees Celsius.
- Digital Displays: Two red LED displays show the current stirring speed (RPM) and the set temperature (°C). The temperature display will blink until the set temperature is reached.
- HOT TOP Indicator: A warning light indicates when the top plate is hot, even if the heat function is turned off.
Procedure:
- Power On: Ensure the unit is plugged in. The power indicator light will illuminate.
- Setting Stirring Speed: Place a stir bar into your vessel and position the vessel on the center of the Pyroceram top plate. Turn the "Stir" knob clockwise to the desired RPM. The digital display will show the set speed. Adjust as needed for proper mixing.
- Setting Temperature: Turn the "Heat" knob clockwise to the desired temperature in degrees Celsius. The digital display will show the set temperature and will blink until the set temperature is achieved. The temperature can be set in 5-degree C increments, ranging from 5°C to 550°C.
- Monitoring: Continuously monitor the process. The microprocessor-based control maintains consistent and repeatable temperature settings within ±2°C.
- Power Off: When finished, turn both the "Stir" and "Heat" knobs counter-clockwise to the "Off" position. Unplug the unit from the power source when not in use. Allow the hot plate to cool down completely before cleaning or moving. The "HOT TOP" indicator will remain lit until the surface temperature is below 60°C.
- External Temperature Control: The unit can be used with an external temperature controller and support rod (sold separately) for enhanced temperature precision. Refer to the external controller's manual for specific instructions.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your Corning PC-420D Stirring Hot Plate.
- Cleaning:
- Always ensure the unit is unplugged and completely cool before cleaning.
- The Pyroceram top plate is scratch, corrosion, and chemical resistant. Clean spills immediately with a damp cloth and mild detergent. Avoid abrasive cleaners or scouring pads that could damage the surface.
- The two-piece casting design helps deflect spills away from electrical areas, simplifying cleaning.
- Wipe down the exterior of the unit with a damp cloth. Do not immerse the unit in water or spray liquids directly onto it.
- Inspection: Periodically inspect the power cord for any signs of damage (fraying, cuts). Check the control knobs for smooth operation.
- Storage: Store the hot plate in a clean, dry environment when not in use.
Troubleshooting
This section addresses common issues you might encounter with your hot plate.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | No power to outlet; power cord not fully plugged in; unit malfunction. | Check power outlet with another device. Ensure power cord is securely connected. If problem persists, contact customer support. |
| Temperature not reaching set point or fluctuating. | Vessel too large for hot plate; insufficient power; external factors (drafts); unit malfunction. | Ensure vessel size is appropriate. Minimize drafts. Verify power supply. If issue continues, contact customer support. |
| Stirrer not working or inconsistent. | Stir bar not present or incorrect size; vessel not centered; liquid too viscous; unit malfunction. | Ensure a suitable stir bar is in the vessel. Center the vessel on the plate. Reduce liquid viscosity if possible. Contact customer support if problem persists. |
| Digital display is blinking. | Temperature has not yet reached the set point. | This is normal operation. The blinking will stop once the set temperature is achieved. |
For issues not listed here or if troubleshooting steps do not resolve the problem, please contact Corning customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Number | PC-420D (6795-420D) |
| Plate Material | Pyroceram Glass-Ceramic |
| Plate Dimensions | 5" x 7" (approx. 12.7 cm x 17.8 cm) |
| Temperature Range | 5°C to 550°C |
| Temperature Accuracy | ±2°C |
| Temperature Increments | 5°C |
| Stirring Speed Range | Variable (±5% of set speed) |
| Power Source | 120V/60Hz |
| Amperage | 5.9 A |
| Watts | 698 W |
| Product Dimensions (L x W x H) | 7"D x 5"W x 5"H (approx. 17.8 cm x 12.7 cm x 12.7 cm) |
| Item Weight | 7.05 Pounds (approx. 3.2 kg) |
| Included Components | Stirrer apparatus (stir bar) |
Warranty and Support
The Corning PC-420D Stirring Hot Plate comes with a two-year warranty from the date of purchase, covering defects in materials and workmanship under normal use. This warranty meets European Standards (EN).
For technical assistance, warranty claims, or service inquiries, please contact Corning customer support. Please have your model number (PC-420D or 6795-420D) and purchase date available when contacting support.
For the most up-to-date contact information, please visit the official Corning website or refer to the documentation included with your product.
