ERT-300 / 張力計

henrylin424

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網球拍線張力測試器ERT 300(開箱)
ERT 300 Manual
* j) H! S# p/ `1 x7 _The right tension for every type of player
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# G& X) R) m! n( a# m: T3 D5 xDynamic Tension DT ( DT-value) / DT is the string bed stiffness
DT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)
/ A& |: _7 m7 y0 p9 o9 V- |9 WDT determines the playing characteristics power and control.
- \& o) O1 U& v' b0 H- i) AHigher DT for more control / Lower DT for more power
Not recommended to play tennis when DT below 28
Restring the racquet when the DT-value has decreased by 10% to 20%
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3 w  y' A* z) C# u+ p) j2 Y; WLo     DT 28-34      Defensive play / Club
Mid    DT 35-41      Dynamic,offensive play / Club,WTA
- R% W# J' t& o, y- _7 FHi      DT 42-46      Fast,aggressive play / Club , WTA , ATP
Hi+    DT 47-54     Very fast,extremely aggressive play / ATP

Within the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.

6 h& z$ F. w/ Z7 Y8 s5 F在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart.
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Gamma ATS ERT 300 Tenniscomputer
, O+ _6 N" ]1 o; A" [4 F* STW上售價169美金,海外運費36美金