Muffle Furnace Parameter Settings

‌I. Core Parameter Configuration‌

  1. ‌Temperature Settings‌

    • ‌Target Temperature (SV)‌: Set according to material requirements (e.g., 1000–1300°C for ashing, 1400–1700°C for sintering).‌

    • Control Accuracy‌: PID algorithms ensure ±0.5°C precision in advanced models.

    • ‌Uniformity‌: Dependent on chamber size and heating element distribution (e.g., three-sided embedded elements for improved gradient).

  2. ‌Heating Rate‌

    • Standard rate: 5–20°C/min; high-performance models support programmable rates (e.g., 50°C/min with silicon carbide elements).

    • Material compatibility: Adjust rates for brittle materials (5–10°C/min recommended)

  3. ‌Dwell Time‌

    • Set via "ST" (soak time) parameter; for example, 120 mins for complete organic decomposition.

    • Programmable controllers allow multi-step timing (e.g., 8-step profiles with hold functions).

  4. ‌Atmosphere Control‌

    • ‌Ambient mode‌: Default air environment for oxidation.

    • ‌Inert gas‌: Use rear gas ports (0.95 cm diameter) for N₂/Ar supply to prevent oxidation.


‌II. Control Panel Functions (English Terms)‌

‌Symbol‌‌English Label‌‌Function‌
SVSet ValueInput target temperature (e.g., 500°C).
RUN/HOLDStart/PauseInitiate heating or pause the program.
A/MAuto/Manual ModeSwitch between preset programs and manual adjustments.
STSoak TimeSet duration for maintaining target temperature (e.g., 60 mins).
EndProgram CompleteDisplayed when the timer finishes; triggers an alarm.

‌III. Operational Guidelines‌

  1. ‌Preheating‌

    • Initial current: 25–30 A; preheat to 300°C for 2 hrs to protect heating elements.

  2. ‌Cooling‌

    • Natural cooling to <200°C before opening the chamber to avoid thermal shock.

  3. ‌Safety Features‌

    • Overheat protection: Adjustable limit to prevent exceeding 1600°C (element max).

    • Door safety switch: Cuts power when opened.


‌IV. Model Selection‌

‌Chamber Size‌‌Typical Use‌‌Controller Type‌
1.99–5.3 LSmall-sample ashing/ignition testsSingle setpoint (e.g., Thermolyne B1)
18.4–42.5 LBulk material sintering8-step programmable controller (C1)

‌Key Terminology‌

  • ‌PLC‌: Programmable Logic Controller (manages heating logic)
    .

  • ‌Thermocouple‌: K-type sensors for temperature monitoring.

  • ‌Moldatherm‌: Ceramic fiber insulation for rapid heat-up



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