Fisher Scientific Isotemp Muffle Furnace 550 Series Manual

The Fisher Scientific Isotemp Muffle Furnace 550 Series is a high-performance laboratory furnace designed for applications requiring precise temperature control up to 1100°C. Features include digital temperature control, programmable settings, ceramic fiber insulation, over-temperature protection, and durable stainless steel construction. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Operating Procedures 7. Maintenance & Cleaning 8. Safety Features 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Digital temperature controller, ceramic heating chamber, stainless steel exterior, safety door interlock, overtemperature protection.

Feature	Description
Temperature Range	Ambient to 1100°C
Controller Type	Digital PID with LED display
Chamber Material	Ceramic fiber insulation
Exterior Construction	Stainless steel
Safety Features	Door interlock, overtemperature protection
Power Requirements	120V/240V AC, 50/60Hz
Chamber Dimensions	Various sizes available
Programmability	Multi-segment temperature programming
Certifications	CE, UL, cUL listed
Warranty	1-year limited warranty

Installation

Unpack and inspect contents. Place on stable, level surface away from flammable materials.

Location: Install in well-ventilated area with minimum 6-inch clearance on all sides.
Power Connection: Connect to appropriate voltage outlet (120V or 240V as specified).
Grounding: Ensure proper grounding of electrical supply.
Initial Inspection: Check for shipping damage before operation.

WARNING! Furnace reaches extremely high temperatures; install away from combustible materials. Ensure proper ventilation.

First-Time Setup

Power on furnace; follow initial setup procedure.

Initial Burn-off: Run empty at 500°C for 2 hours to remove manufacturing residues.
Temperature Calibration: Verify temperature accuracy using calibrated thermometer.
Program Setup: Configure default temperature programs if needed.
Safety Check: Test door interlock and overtemperature protection.

CAUTION! Wear appropriate personal protective equipment (PPE) when operating furnace.

Specifications

Temperature Range: Ambient to 1100°C
Temperature Stability: ±1°C at 1000°C
Heating Rate: Up to 20°C per minute
Controller: Digital PID with 30-segment program capacity
Chamber Volume: Various models from 1.2L to 9.0L
Power Requirements: 120V/240V AC, 50/60Hz
Exterior Dimensions: Varies by model
Weight: 15-45 kg depending on model
Certifications: CE, UL, cUL

Controls and Settings

Access control panel via front digital display and keypad.

Control Panel: POWER, SET, UP/DOWN arrows, ENTER, PROGRAM, START/STOP.

Temperature Settings: Set point temperature, ramp rate, hold time. Safety: Overtemperature protection set point, door interlock. Programming: Multi-segment programs with ramp and soak capabilities. Display: Current temperature, set point, program status, error codes.

Operating Procedures

Standard operating procedure for sample processing.

Preparation: Load samples using heat-resistant crucibles or containers.
Program Selection: Choose pre-set program or create new temperature profile.
Start Cycle: Close door securely, press START to begin heating cycle.
Monitoring: Observe temperature display and program progress.
Completion: Allow furnace to cool before opening door.
Sample Removal: Use appropriate tongs and heat-resistant gloves.

WARNING! Do not open door during high-temperature operation. Always use thermal protection when handling hot materials.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and longevity.

Daily: Wipe exterior with damp cloth; inspect door seal.
Weekly: Vacuum chamber to remove debris and ash.
Monthly: Inspect heating elements and thermocouple.
Annually: Professional calibration and safety inspection.

CAUTION! Always disconnect power before performing maintenance. Allow furnace to cool completely before cleaning.

Safety Features

Multiple safety systems protect users and equipment.

Door Safety Interlock: Prevents operation when door is open
Overtemperature Protection: Independent backup controller
Thermal Insulation: Low exterior surface temperature
Ground Fault Protection: Electrical safety circuit
Error Display: Visual indicators for fault conditions

Regulatory Information

Complies with UL Standard 3101-1, CSA C22.2 No. 1010.1, and CE directives for laboratory equipment. Manufactured under ISO 9001 quality system. Copyright © Fisher Scientific. For technical support, contact Fisher Scientific Customer Service at 1-800-766-7000 or visit www.fishersci.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't heat	Power supply, heating elements	Check power connection; verify circuit breaker; inspect heating elements.
Temperature inaccurate	Calibration, thermocouple	Recalibrate temperature; check thermocouple connection.
Error code displayed	Overtemperature, sensor fault	Refer to error code table in manual; reset if safe.
Door won't lock	Interlock mechanism	Check door alignment; inspect interlock switch.
Excessive exterior heat	Insulation, ventilation	Ensure proper clearance; check insulation integrity.

Reset: Power cycle unit; clear error codes from control panel.

Service: 1-800-766-7000; www.fishersci.com