KALIBRASI ALAT UKUR DEBIT PADA MODEL SALURAN DENGAN RECHBOX (HULU) DAN THOMPSON (HILIR)

Abstract

Measure instrument of discharge in this experiment was calibrated before the experiment took place, in order to decrease the experiment relative error smaller   than 5%. Physical model of distribution box has ratio 1 : 1 in prototype and it has used verification in order to get result carefulness that fulfils the prerequisite. There are three conditions in this testing, that is one channel operations, three channels operation and three channels operation with discharge plan on two channels (right and left) and one door operation to frontal side. It using six variations discharge testing to stream flow type respectively on distribution box in order to get discharge distribution pattern. One channel has gotten the same headwaters discharge and downstream discharge. Three channels has gotten discharge coefficient (Cd) 0.56 and friction coefficient (f) 0.046, where as discharge distribution has gotten ratio 11.44%, 71.24% and 18.35% (no door). Three channels that using door has gotten discharge distribution in ratio 12.68%, 65.89%, and 21.05% (a = 4 cm, frontal) and 11.77%, 68.90% and 19.33% (a = 8 cm, frontal) on discharge plan has gotten equation on pipe one y = 0.1097 (h) ^1.4901 and on  pipe three y = 0.1017 (h) ^1.566, with the result that discharge that happen is reasonable to pipe diameter, discharge variation and high variation of opening door (a)