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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯
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網球拍線張力測試器ERT 300(開箱)
. f U v: l* Q9 JERT 300 Manual
4 B6 |# o( v! n! x2 i' jThe right tension for every type of player
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! U. K0 p6 E. p9 f' Q+ t6 |Dynamic Tension DT ( DT-value) / DT is the string bed stiffness
. } Z0 i. e c7 {* p8 X# KDT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)0 g4 {5 X* D: K
DT determines the playing characteristics power and control.9 `9 m- l7 D5 x% ?. o
Higher DT for more control / Lower DT for more power
0 i, R1 U1 w! k1 WNot recommended to play tennis when DT below 289 i8 }+ P5 F! O. h! v0 c. P
Restring the racquet when the DT-value has decreased by 10% to 20%
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Lo DT 28-34 Defensive play / Club
- r4 F0 w0 y% }* ~; L- P z6 sMid DT 35-41 Dynamic,offensive play / Club,WTA
& P' N5 D; `3 z" q# a5 u" n, W; YHi DT 42-46 Fast,aggressive play / Club , WTA , ATP
+ m5 `+ p" j. l8 C {9 b, \% lHi+ DT 47-54 Very fast,extremely aggressive play / ATP
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# E4 u/ F- F2 ]! I8 M2 F) j% v& }Within the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.
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& U7 e* c( }, @5 L" F( j1 Q在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.0 q% m8 ^3 c' p
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發表於 2011-6-30 11:21:01
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