English Product Name

Overview

The North Guang Precision Instrument CZF-51 Horizontal & Vertical Combustion Tester is a laboratory-scale apparatus engineered for standardized flammability assessment of non-metallic materials—primarily plastics, polymers, and insulating composites—under controlled 50 W flame exposure. It implements the core principles of ASTM D635, ASTM D3801, ISO 9772, ISO 10093, and GB/T 2408 (equivalent to IEC 60695-11-10), enabling both horizontal (HB) and vertical (V-0, V-1, V-2) burning classification tests in accordance with UL 94 requirements. The instrument utilizes a calibrated Bunsen burner with precise gas flow control and thermally stable ignition geometry to deliver reproducible flame impingement at defined angles (0°–45°), ensuring compliance with regulatory test protocols used in electronics, automotive, construction, and wire & cable industries for material qualification and safety certification.

Key Features

• Microprocessor-controlled operation with digital timer resolution of 0.1 s (range: 1.0–999.9 s) for both ignition duration and afterflame time measurement
• Motor-driven specimen holder positioning for automatic retraction of the Bunsen burner post-ignition—eliminating manual intervention during critical test phases
• Adjustable burner tilt mechanism (0°–45°) with engraved angular scale for precise orientation alignment per test method requirements
• Integrated auto-ignition system using piezoelectric spark ignition—ensuring consistent flame initiation without operator variability
• Standardized combustion chamber volume options: 0.5 m³, 0.75 m³ (default), or 1.0 m³—designed to meet ventilation and smoke accumulation criteria specified in ISO 10093 and ASTM E136
• Robust steel enclosure with epoxy-coated finish; rear-mounted 100 mm diameter exhaust port compatible with standard fume hood ducting
• Dual-mode operation: independent selection of horizontal or vertical test configuration via mechanical fixture adjustment

Sample Compatibility & Compliance

The CZF-51 accommodates rectangular specimens up to 125 mm × 13 mm × maximum thickness (typically ≤13 mm), conforming to UL 94 specimen dimensional tolerances. Test substrates include thermoplastics, thermosets, laminates, foams, and fiber-reinforced composites. The system supports use of certified calibration reference materials—including standardized cotton gauze as ignition substrate—and is fully compatible with optional traceable temperature verification hardware: imported K-type insulated mineral-insulated thermocouples (Ø0.5 mm) and NIST-traceable copper calibration masses (Ø5.5 mm, 1.76 ± 0.01 g; or Ø9 mm, 10.00 ± 0.05 g). All operational parameters—including flame temperature ramp profile (100 °C ±5 °C to 700 °C ±3 °C within 44 ±2 s or 54 ±2 s)—are verifiable using external temperature calibration rigs compliant with ISO/IEC 17025-accredited metrology practices.

Software & Data Management

While the CZF-51 operates via embedded microcontroller logic (no PC dependency), it provides full audit trail capability through non-volatile memory storage of up to 100 test records—including ignition time, afterflame time, afterglow time, flame height observation, and pass/fail classification per UL 94 rating. Digital display outputs support GLP-compliant documentation: date/time stamp, operator ID input field (via keypad), and configurable pass/fail thresholds aligned with V-0/V-1/V-2 criteria. Optional RS-232 interface enables data export to LIMS or QA databases. System firmware adheres to functional safety principles outlined in IEC 61508, and all electrical components meet CE marking requirements under EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU.

Applications

• Pre-certification screening of polymer formulations prior to third-party UL/CSA/CCC testing
• QC release testing for injection-molded housings, PCB enclosures, and connector bodies in electronics manufacturing
• R&D evaluation of flame-retardant additive efficacy (e.g., brominated, phosphorus-based, or mineral-filled systems)
• Material substitution validation in automotive interior trim and HVAC ducting applications
• Supporting ISO 14040-compliant life cycle assessment where fire performance is a critical environmental impact parameter

FAQ

What gases are acceptable for flame generation in the CZF-51?

Certified 98% methane (CH₄), natural gas with calorific value 37 MJ/m³ ±1 MJ/m³, or propane (C₃H₈) may be used. Gas supply must include pressure regulator, flow meter, and flashback arrestor meeting EN ISO 25037 requirements.

Is the CZF-51 suitable for testing thin films or foams?

Yes—provided specimens meet minimum dimensional stability requirements (e.g., no curling or melting-induced detachment during flame exposure) and are supported by the standard specimen holder or auxiliary fixtures per ASTM D3801 Annex A1.

Does the unit include temperature calibration validation hardware?

No—the thermal verification system (copper mass + K-type thermocouple) is an optional accessory. Users must procure it separately to perform periodic temperature profile verification per ISO 5657 or UL 94 Clause 7.3.

Can test results be exported electronically?

Yes—via optional RS-232 serial output. Raw timer logs and pass/fail status can be transmitted to external software for automated report generation and 21 CFR Part 11-compliant electronic signatures when integrated with validated QA platforms.

What electrical safety certifications does the CZF-51 hold?

The unit complies with GB/T 14048.1 (equivalent to IEC 60947-1) for low-voltage switchgear and controls, and carries CCC mark for domestic China market. CE documentation is available upon request for EU shipment.