comparison: www/includes/formulas.php
www/includes/formulas.php
- changeset 100
- 08c92cb740b9
- parent 96
- 107c12c3e49d
- child 101
- 5b6bb99bc52a
equal
deleted
inserted
replaced
| 99:f433193f7bb6 | 100:08c92cb740b9 |
|---|---|
| 19 define('MMCaOH2', '74.06268'); | 19 define('MMCaOH2', '74.06268'); |
| 20 | 20 |
| 21 | 21 |
| 22 function ebc_to_srm($ebc) | 22 function ebc_to_srm($ebc) |
| 23 { | 23 { |
| 24 // Srm = -1.32303E-12*Ebc4-0.00000000291515*Ebc3+0.00000818515*Ebc2+0.372038*Ebc+0.596351 | 24 $srm = -1.32303E-12 * pow($ebc, 4) - 0.00000000291515 * pow($ebc, 3) + 0.00000818515 * pow($ebc, 2) + 0.372038 * $ebc + 0.596351; |
| 25 return -1.32303E-12 * pow($ebc, 4) - 0.00000000291515 * pow($ebc, 3) + 0.00000818515 * pow($ebc, 2) + 0.372038 * $ebc + 0.596351; | 25 if (($ebc < 0) || ($srm < 0)) |
| 26 // return $ebc * 0.508; | 26 syslog(LOG_NOTICE, "ebc_to_srm(".$ebc.") = ".$srm); |
| 27 return $srm; | |
| 27 } | 28 } |
| 28 | 29 |
| 29 | 30 |
| 30 | 31 |
| 31 function srm_to_ebc($srm) | 32 function srm_to_ebc($srm) |
| 32 { | 33 { |
| 33 // EBC = 0.000000000176506*Srm4+ 0.000000154529*Srm3-0.000159428*Srm2+2.68837*Srm-1.6004 | |
| 34 // | |
| 35 // Formule van Adrie Otten. brouwhulp. | 34 // Formule van Adrie Otten. brouwhulp. |
| 36 $ebc = 0.000000000176506 * pow($srm, 4) + 0.000000154529 * pow($srm, 3) - 0.000159428 * pow($srm, 2) + 2.68837 * $srm - 1.6004; | 35 $ebc = round( 0.000000000176506 * pow($srm, 4) + 0.000000154529 * pow($srm, 3) - 0.000159428 * pow($srm, 2) + 2.68837 * $srm - 1.6004 ); |
| 37 return round($ebc); | 36 if (($ebc < 0) || ($srm < 0)) |
| 37 syslog(LOG_NOTICE, "srm_to_ebc(".$srm.") = ".$ebc); | |
| 38 return $ebc; | |
| 38 } | 39 } |
| 39 | 40 |
| 40 | 41 |
| 41 | 42 |
| 42 function ebc_to_color($ebc) | 43 function ebc_to_color($ebc) |
