Standard Smoke Tunnel – Lab Version
Equipment Function：
Standard smoke box is used to test the sensitivity, directionality, repeatability, high and low temperature, dazzling and other characteristics of smoke alarm. The equipment meets the requirements of GB 20517, GB4715, EN 14604, EN 54-7 and ISO standards. Standard test tunnel is composed of smoke tunnel, photoelectric smoke density meter, heater, chiller, dazzling device, computer, etc., and has high quality optical obscuration meter used to measure the smoke concentration value in the smoke tunnel. The equipment can be equipped with heater and refrigerator, which can automatically control the temperature in the box to drop to 0°+/-2°C at a rate of less than 1°C/min, or rise to 55+/-2°C range, and test the alarm sensitivity value in high and low temperature state.
Heat alarm test function are able to perform 0.2 to 30°C per minutes temperature rise test up to 160°C as required by EN 54-5, GB4716 or BS 5446-2
Wind speed, smoke rate and temperature are settable in software to meet standard test requirements. The specially developed Zomtest Smoke Test Tunnel software continuously monitors the Smoke concentration, Smoke rising speed, and temperature rate, and records the alarm sensitivity.
Equipment Parameters ：
Model: ZNEN54-7HC
Power Supply: 220V AC Power: 20KW
Tunnel size: 3.1m * 0.7m * 1.4m. Tunnel section size: 450mm * 400mm
Smoke rising rate: 0.015~0.1 dB/m/mi, preset 0.005dB/m, software can be set
Wind speed: 0~ 1.2m /s, brushless DC motor speed control, software speed setting
Optical smoke density meter: transmitted light, wavelength 880nm~950nm, range: 0~2 dB/m
High temperature test function: room temperature ~55°C, temperature control accuracy +/-1°C, AIPID intelligent temperature control system.
Low temperature test function: 0°C to room temperature, temperature control accuracy +/-1°C, AIPID intelligent temperature control system.
Anti-ambient light interference test device
Constant smoke control function
Computer: including computer and monitor
Heat detector test: perform 0.2 to 30°C/Min.
Standards:
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GB20517-2006, GB4715-20005,
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EN 14604:2005+AC:2008Smoke alarm devices
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EN 54-7:2018 Fire detection and fire alarm systems- part 7: Smoke detectors – Point smoke detectors that operate using scattered light, transmitted light or ionization
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EN54-29:2015 Fire detection and fire alarm systems - Part 29: multi-sensor fire detectors – point detectors using a combination of smoke and heat sensors
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ISO 7240-7
Test Items：
Smoke alarm and smoke detector
1． Initial sensitivity
2． Directional dependence
3． Air movement
4． Repeatability
5． Dry heat
6． Dazzling
7. Other sensitivity test