Barnstead International 30400 Series

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Overview

Function Description
Important Technical Specifications
General Specifications (for F30420C, -33, -60, -80; F30428C, -60, -80; F30430CM, -33, -60; F30438CM, -60)
Environmental Conditions
Usage Features
Maintenance Features
Safety Information

This document describes the Barnstead International Type 30400 Thermolyne Furnace, an automatic and programmable laboratory and heat-treating furnace designed for optimum element life. It is suitable for applications requiring temperatures from 400°F (204°C) to 1800°F (982°C) for continuous use, or temperatures from 1800°F (982°C) to 2000°F (1093°C) for intermittent use (more than 3 hours) and intermittent use (less than 3 hours) respectively.

Function Description:

The Type 30400 furnace is equipped with a heating chamber, an automatic proportioning digital set, digital read control with overtemperature protection, and a door interlock relay for user safety. Programmable models allow for varying temperature or process value over time, with programs stored as a series of segments that can be run once, repeated a set number of times, or run continuously. The controller features sensor break protection, self-tuning capability, and over-temperature protection (OTP). Ashing furnaces (-60 models) include a feature to provide air (or inert gas) flow within the furnace chamber.

Important Technical Specifications:

The furnace models include:

Single Setpoint Models with OTP: F30420C, F30420C-33, F30428C
8 Segment Programmable Models with OTP: F30420C-33-80, F30420-33-60-80, F30420C-60-80, F30420C-80, F30428C-60-80, F30428C-80
4 X 16 Segment Programmable Models with OTP: F30430CM, F30430CM-33, F30430CM-33-60, F30430CM-60, F30438CM, F30438CM-60

General Specifications (for F30420C, -33, -60, -80; F30428C, -60, -80; F30430CM, -33, -60; F30438CM, -60):

Overall Dimensions (IN. (CM)): Width 21 1/2 (55), Height 29 1/2 (75), Depth 25 1/2 (65)
Chamber Dimensions (IN. (CM)): Width 14 (35), Height 14 (35), Depth 14 3/8 (37)
Weight (Lbs. (KG)): 188 (86)
Electrical Ratings: Volts 240, Amps 22.9, Watts 5500, Freq. 50/60, Phase 1 (for 208V models: Volts 208, Amps 26.4, Watts 5500, Freq. 50/60, Phase 1)
Temperature Ratings: Cont. 400°F-1800°F (204°C)-(982°C), Intermittent 1800°F-2000°F (982°C)-(1093°C). Maximum continuous temperature for ashing furnaces (-60 models) is 1787°F (975°C).

Environmental Conditions:

Operating: 17°C - 27°C, 20% to 80% relative humidity, non-condensing. Installation Category II (over-voltage) in accordance with IEC 664. Pollution Degree 2 in accordance with IEC 664.
Altitude limit: 2,000 meters.
Storage: -25°C to 65°C; 10% to 85% relative humidity.

Usage Features:

Unpacking: Visually inspect for damage, remove packing material from the chamber, vacuum the chamber to remove insulation dust, and retain packaging for potential reshipment.
Site Selection: Install on a sturdy surface with adequate space for ventilation. Ambient temperature should not exceed 40°C (104°F).
Electrical Connections: Ensure the electrical ratings match the specification plate on the back of the furnace.
Operation (All Models):
- Power Switch: Turns the furnace ON/OFF. The digital display illuminates, and the furnace begins to heat to the controller's setpoint.
- Cycle Light: Amber light illuminates when heating elements are being applied.
- Door Safety Switch: Removes power from heating elements when the door is opened. The cycle light switches OFF when the door is opened.
Single Setpoint Models w/OTP:
- Basic Operation: Displays measured value (process value) in the HOME DISPLAY upon startup.
- Buttons: PAGE (selects parameter lists), SCROLL (selects parameters within a list), DOWN (decreases value), UP (increases value).
- Viewing/Changing Setpoint: Press UP or DOWN buttons to view/change the setpoint.
- Viewing Display Units: Press SCROLL button to view temperature units (°C/F/K).
- Viewing % Output Power: Press SCROLL button twice to view % output power (read-only).
- Sensor Break Protection: Digital display blinks "S.br" and power to heating element shuts OFF if thermocouple opens.
- Over-Temperature Protection (OTP): Activates during alarm conditions when temperature deviates beyond the limit. "Deviation High" alarm (idHi) can be adjusted.
- Tuning: Self-tuning feature optimizes temperature accuracy. Press PAGE, SCROLL, UP/DOWN buttons to initiate and monitor tuning.
Single Ramp & Dwell: This controller type offers single ramp and dwell programming capabilities with five different modes.
8 Segment & 4x16 Segment Programmable Models w/OTP:
- Basic Operation: Performs a self-test and displays measured value in the HOME DISPLAY.
- Buttons: AUTO/MAN (automatic mode, manual disabled), RUN/HOLD (starts/holds/cancels program, exits program, indicates program end or holdback), PAGE, SCROLL, DOWN, UP.
- Viewing Display Units & % Output Power: Similar to single setpoint models.
- Programming: Create new programs or edit existing ones by navigating through program lists (ProG LiSt) and setting parameters like target setpoint (tGt), ramp rate (rAtE), dwell time (dwEll), number of cycles (CYC.n), and end segment type (End).
- Holding/Cancelling Programs: Press/hold RUN/HOLD button.
- Tuning: Similar to single setpoint models, with automatic tuning features.
Installation and Operation of Air Control (for -60 models):
- Requires a pressurized air line (0-40 psi).
- Connect tubing to the furnace's input fitting and a regulated air service line.
- Turn flow control valve to closed, then regulator to 30 psi.
- Open flow control valve slowly until flow meter reads 40-45 liters/minute.
- Check for air exhausting from the manifold in the chamber.
- Exhaust Tubing Hook-up: Connect flexible tubing from the vent port to a negative pressure exhaust system capable of handling smoke and gases.
Furnace Loading: Use only the center two-thirds of the chamber. Use a hearth plate to elevate loads from the bottom heating element. Spread small parts evenly. Keep objects away from the thermocouple. Use insulated tongs and mittens, and wear safety glasses.

Maintenance Features:

Preventative Maintenance:
- Ensure proper ventilation.
- Regularly clean the furnace (run empty at 1600°F for 4 hours to burn off contamination).
- Wipe exterior surfaces with lightly dampened cloth and mild soap solution.
Problem Solving: A comprehensive chart lists common problems, probable causes, and corrective actions (e.g., furnace not heating, slow heatup, inaccurate readings, element burnout, door switch malfunction).
Servicing:
- Replacing a Heating Element: Disconnect power, remove back terminal cover, loosen screws on terminals, pull out defective element, slide in new element, reconnect leads, replace cover, test.
- Replacing a Platinel II Thermocouple: Disconnect power, remove back terminal cover, remove screws on thermocouple terminals, pull out thermocouple, insert new thermocouple (observing polarity), secure connections, replace cover, test.
- Replacing Solid State Relay: Disconnect power, remove back cover, remove element lead wires, remove control section, install new relay, reassemble, test.
- Replacing Door Switch (Microswitch): Disconnect power, remove back cover, remove element lead wires, remove control section, remove screws from microswitch, insert new microswitch, reassemble, test.
- Realigning Door Strike: Disconnect power, loosen screws on door strike, adjust bracket position until door switch clicks when door is approximately 1" from being closed, tighten screws.
- Replacing Control Module: Gently pry retaining tabs, pull out control, install new controller.

Safety Information:

Alert Signals: Warning (personal injury), Caution (damage to equipment), Note (pertinent facts/conditions), Hot Surface (personal injury).
Electrical Shock: Disconnect power before servicing.
Burns: Do not touch hot interior/exterior surfaces.
Personal Injury: Do not use in the presence of flammable/combustible materials. Wear safety glasses and high-temperature gloves when loading/unloading.
WARNINGS: This product contains refractory ceramic fiber or fiberglass insulation, which can produce respirable dust or fibers during disassembly. Dust or fibers can cause irritation and aggravate pre-existing respiratory diseases. Refractory ceramic and refractory ceramic fibers (after reaching 1000°C) contain crystalline silica, which can cause lung damage (silicosis). Refer to Material Safety Data Sheets (MSDS) for handling information.
General Usage: Use a properly grounded electrical outlet. Disconnect power supply prior to maintenance. Have the door switch operating properly.
Hot Surface: Allow furnace to cool before contact.
To avoid personal injury: Do not use in the presence of flammable or combustible materials; fire or explosion may result. This device contains components which may ignite such materials. Refer servicing to qualified personnel.
Electrical Safety: Ensure proper grounding and correct voltage.
Overloading: Do not overload the furnace chamber; load should not occupy more than two-thirds of the chamber.
Exhaust: Connect exhaust port to an appropriate exhaust system to prevent smoke and gases from filling the work area.