Level 1 Level 1 Level 1 Level 1 Level 2 Level 2 Level 2 Level 2 Level 3 Level 3 Level 3 Level 3 Level 4 Level 4 Level 4 Level 4 Test Test Test Test Measured in: Measured in: Measured in: Measured in: Convective Heat Radiant Heat Drops of Molten Metal Molten Metal Seconds Seconds Number of Drops Gram Resistance to Convective Heat: The length of time is measured for the heat from a gas flame to increase the WHPSHUDWXUH RI WKH JORYHV LQVLGH PDWHULDO E\ Ý& Resistance to small splashes of molten metal: The test is based on the total number of drops of molten metal required to increase WKH WHPSHUDWXUH E\ Ý& EHWZHHQ WKH LQVLGH RI WKH JORYH DQG WKH VNLQ Resistance to Large splashes of molten metal: 6LPXODWHG VNLQ LV DWWDFKHG WR WKH LQVLGH RI WKH JORYH PDWHULDO 0ROWHQ PHWDO LV WKHQ SRXUHG RYHU WKH JORYH PDWHULDO 7KH WRWDO QXPEHU RI JUDPV LV PHDVXUHG RI KRZ PXFK PROWHQ PHWDO LV UHTXLUHG WR GDPDJH WKH VLPXODWHG VNLQ Resistance to Radiant Heat: 7KH JORYHV PDWHULDO LV VWUHWFKHG LQ IURQW RI D KHDW VRXUFH ZLWK DQ HIIHFW RI NZ NYP 7KH DYHUDJH WLPH LV PHDVXUHG IRU WKH KHDW SHQHUWUDWLRQ RI NZ NYP 263
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