Ana amfani da na'urar gwajin 'yanci ta Kanada (Canada Standard Freeness Tester) don tantance adadin tace ruwa na dakatarwar ruwa na nau'ikan ɓaure daban-daban, kuma ana bayyana shi ta hanyar ra'ayin 'yanci (CSF). Yawan tacewa yana nuna yadda zare yake bayan an yi masa niƙa ko kuma an niƙa shi da kyau. Ana amfani da na'urar auna 'yanci ta yau da kullun a cikin tsarin yin takarda, kafa fasahar yin takarda da gwaje-gwaje daban-daban na cibiyoyin bincike na kimiyya.
Kayan aiki ne mai matuƙar muhimmanci don aunawa da kuma yin takarda. Kayan aikin yana ba da ƙimar gwaji da ta dace da sarrafa fitar da ɓawon itace da aka niƙa. Haka kuma ana iya amfani da shi sosai ga canje-canjen tace ruwa na sinadarai daban-daban yayin da ake bugun da tacewa. Yana nuna yanayin saman zare da yanayin kumburi.
Ƙarfin ƙa'idodin Kanada yana nufin cewa a ƙarƙashin sharuɗɗan da aka tsara, amfani da su don gwada aikin dakatar da ruwa na 1000 mL shine (0.3 + 0.0005)%, zafin jiki shine 20 °C, girman (mL) na ruwan da ke fitowa daga bututun gefen kayan aikin yana nufin ƙimar CFS. An yi kayan aikin da dukkan bakin ƙarfe, yana da tsawon rai na aiki.
Na'urar gwajin 'freeness' ta ƙunshi ɗakin tacewa da mazurari mai aunawa wanda ke juyawa daidai gwargwado, an haɗa shi a kan maƙallin da aka gyara. An yi ɗakin tace ruwa da bakin ƙarfe. A ƙasan silinda, akwai farantin allo mai rami mai bakin ƙarfe da murfin ƙasa mai rufewa, wanda aka haɗa shi da ganye mai laushi a gefe ɗaya na ramin zagaye kuma an ɗaure shi da kyau a ɗayan gefen. Murfin sama yana rufewa, lokacin da aka buɗe murfin ƙasa, ɓangaren ɓangaren zai fita.
Ana tallafawa silinda da mazubin matattarar mai siffar mazubi ta hanyar amfani da flanges guda biyu na mashinan da aka yi amfani da su a kan mashin ɗin bi da bi.
TAPPI T227
ISO 5267/2, AS/NZ 1301, 206s, BS 6035 sashi na 2, CPPA C1, da SCAN C21;QB/T1669一1992
| Abubuwa | Sigogi |
| Nisan Gwaji | 0~1000CSF |
| Amfani da masana'antu | Ɓangaren zare, mai haɗakarwa |
| abu | Bakin ƙarfe 304 |
| nauyi | 57.2 kg |