| Laboratory fume hood: |
| inside volume 0.5m3 |
| chamber permits observation of tests |
| normal thermal circulation of air during burning |
| inside surface should be dark color |
| light level shall be less than 20lx |
| exhaust fan to remove combustion |
| exhaust fan should be turned off during testing |
| Optional: mirror to capture rear view |
| Laboratory burner: |
| tube with length 100±10mm |
| inside diameter 9.5±0.3mm |
| compliance with ASTM D 5025 |
| IEC TS60695-11-4 Method A (tech equ ASTM D 5025) |
| and ignition source P/PF2 os ISO 10093 (tech equ ASTM D 5025) |
| Burner Wing Tip (used in HBF, HF-1 HF-2) |
| length of slit 48±1mm |
| width 1.3±0.05mm |
| Burner Mounting Fixture: |
| 20 degree from vertical axis (used in 5VA,5VB) |
| Ring stands |
| for horizontal and vertical postioning of specimen or wire gauge |
| stands with clam adjustable to desired angles and heights constructed from aluminium or steel |
| Timing devices- accurate to 0.1sec |
| measuring scale- graduated in mm |
| gas supply- technical grade methane gas (min 98% pure) with regulator and meter for uniform gas flow |
| Wire gauze: |
| approximatel 20 opening per 25mm |
| made with 0.43±0.03mm diameter iron or steel wire and cut to approx 125mm squares (used in HB) |
| conditioning room or chamber : 23± 2 deg C temp |
| Humdity 50±10 % |
| HB support Fixture-(used in HB) |
| metal support fixture for specimen that are not supporting |
| Micrometer- capable of being read to 0.01mm |
| cotton- a supply if absorbent 100% cotton |
| dessicator- containing anhydrous calcium chloride |
| maintaining at relative humidity exceeding 20% at 23±2deg C |
| conditioning oven- min of 5 air changes per hour, maintained at 70±2deg C |
| specimen mandrel form- 12.7±0.5mm diameter rod with min 250mm length (used in VTM-0, VTM-1, VTM-2) |
| Tape-pressure sensitive adhesive (used in VTM-0, VTM-1, VTM-2) |
| Support gauze (used in HBF, HF-1, HF-2) |
| wire cloth plain weave, low caron, plain steel or stainless steel |
| approx 215mm longX75mm wide having 13mm length bent to form a right angle at one end |
| consist of 6.4mm mesh gauze constructed of 0.88±0.05mm dia steel wire |
| cloth mesh and wire dia to be determined as per ASTM E 437 |
| Foam support fixture(used in HBF, HF-1, HF-2) |
| fixture capable of holding support gauze including height adjustment |
| Manometer/ pressure gage- capable of measuring 200mm of water with increment of 5mm |
| Flow meter- a rotameter calibrated as per practice of rotameter calibration D 3195, with correlation curve appropriate to gas, or a mass flow meter with ± 2 percent accuracy. |
