球員和場地的相互作用特點是人造草坪場地建生和維護所要考慮的重要因素，一種重要的相互作用我們叫做牽引力或者扭轉力，也叫做傳動阻力。當阻力對應旋轉力太高時，對運動員來說壓力就變大，當阻力太小時，運動員可能會滑倒。因為這個原因，FIFA和IRB都制定了場地牽引力系數(shù)的測試流程，這也是Deltec牽引力系數(shù)測試儀所要測試的內容。檢測的自由落體模塊重量是46公斤，在制定的高度墜落來檢測牽引里系數(shù)。獨特的人類學設計使得檢測設備的測試方式簡單。自由落體重量模塊包含幾個不同的重量塊。測試儀器還包含一個三腳架和一個軸承來保證自由降落和牽引力的測試包含最少的摩擦。檢測重量模塊自由降落后，扭矩待定值的結果由特制的扭矩扳鉗來旋轉測試表的角度來表現(xiàn)（最少45度）。

特點

堅固耐用；

自由落體模塊可以分解成幾塊；

儀器可以分解，組裝；

航空箱包裝；

可選搬運組件可以在測試場地上靈活搬運測試儀

應用場地：足球，橄欖球

應用標準：EN15301，EN15330，FIFA06

Rotational Resistance Tester

The interaction between player and field is an important factor in the assessment of an artficial turf surface.One of these interactions is the torsion or traction,also known as the rotational resistance.When the resistance against rotation is too high,too much stress may be placed on the joints of the sportsman.When the resistance is too low,the result can be insufficient grip with the effect of the sports-man slipping.For thisreasons the FIFA and IRB have made a testing procedure which can be performed with the Deltec Rotational Resistance Tester.The test foot must be loaded with weights till it reaches 46kg and must fall from a predetermined height before determining the resistance against rotation.The Deltec Rotational Resistance Tester performs the measurements in a simple manner.During the development,special attention was given to ergonomic characteristics of the device.The weight