ERT-300 / 張力計

henrylin424

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6 K5 ^# R* Y& f% |. |網球拍線張力測試器ERT 300(開箱)
ERT 300 Manual
' v9 P4 j* s! e; V' D6 T. bThe right tension for every type of player
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* T# @$ t2 H; R5 n5 KDynamic 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)
DT determines the playing characteristics power and control.
Higher DT for more control / Lower DT for more power
2 A4 j3 \4 J/ a' [7 DNot recommended to play tennis when DT below 28
1 X, n) u, y9 ]  u4 ^Restring the racquet when the DT-value has decreased by 10% to 20%
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; k, r; X- S/ }Lo     DT 28-34      Defensive play / Club
Mid    DT 35-41      Dynamic,offensive play / Club,WTA
5 R" d: ]' L& d& y  ?; L$ _Hi      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.

0 _+ S" S5 g  m% {& Z# |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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8 U$ R1 N0 r2 M% Z# s' `7 S- CGamma ATS ERT 300 Tenniscomputer
3 f8 P  O/ A4 I) Y$ C' ]TW上售價169美金,海外運費36美金
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