comparison: www/js/global.js
www/js/global.js
- changeset 561
- dc618b8a9552
- parent 554
- c62ff53cfc3d
- child 577
- b4bfed3684d0
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| 560:850e82c1021d | 561:dc618b8a9552 |
|---|---|
| 1071 return sg_to_plato(sg) * my_brix_correction; | 1071 return sg_to_plato(sg) * my_brix_correction; |
| 1072 } | 1072 } |
| 1073 | 1073 |
| 1074 | 1074 |
| 1075 | 1075 |
| 1076 function brix_to_fg(OBrix, FBrix) { | |
| 1077 // Brouwhulp, werkt zonder brix_correctie, waarom? | |
| 1078 var FGbh = Round(1.0031 - 0.002318474 * OBrix - 0.000007775 * (OBrix * OBrix) - 0.000000034 * Math.pow(OBrix, 3) + | |
| 1079 0.00574 * (FBrix) + 0.00003344 * (FBrix * FBrix) + 0.000000086 * Math.pow(FBrix, 3), 4); | |
| 1080 | |
| 1081 // from http://seanterrill.com FGoc = old cubix, FGnc = new cubic, FGnl = new linear | |
| 1082 var OBc = OBrix / my_brix_correction; | |
| 1083 var FBc = FBrix / my_brix_correction; | |
| 1084 | |
| 1085 // Old Cubic, almost the same a BrouwHulp, different offset and with brix_correction. | |
| 1086 var FGoc = Round(1.001843 - 0.002318474 * OBc - 0.000007775 * (OBc * OBc) - 0.000000034 * Math.pow(OBc, 3) + | |
| 1087 0.00574 * (FBc) + 0.00003344 * (FBc * FBc) + 0.000000086 * Math.pow(FBc, 3), 4); | |
| 1088 | |
| 1089 // New cubic. This looks the best to use. | |
| 1090 var FGnc = Round(1 - 0.0044993 * (OBc) + 0.0117741 * (FBc) + | |
| 1091 0.000275806 * (OBc * OBc) - 0.00127169 * (FBc * FBc) - | |
| 1092 0.00000727999 * Math.pow(OBc, 3) + 0.0000632929 * Math.pow(FBc, 3), 4); | |
| 1093 | |
| 1094 // New linear, results are pretty much too high and way off for heavy beers. | |
| 1095 var FGnl = Round(1 - 0.000856829 * OBc + 0.00349412 * FBc, 4); | |
| 1096 | |
| 1097 console.log('brix_to_fg(' + Round(OBrix, 2) + ', ' + FBrix + ') FGbh:' + FGbh + ' FGoc:' + FGoc + ' FGnc:' + FGnc + ' FGnl:' + FGnl); | |
| 1098 return FGnc; | |
| 1099 } | |
| 1100 | |
| 1101 | |
| 1102 | |
| 1076 function estimate_sg(sugars, batch_size) { | 1103 function estimate_sg(sugars, batch_size) { |
| 1077 | 1104 |
| 1078 var plato, sg, i; | 1105 var plato, sg, i; |
| 1079 | 1106 |
| 1080 plato = 100 * sugars / batch_size; | 1107 plato = 100 * sugars / batch_size; |
