ERT-300 / 張力計

henrylin424

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7 u) O5 s/ W( V6 p- O  g網球拍線張力測試器ERT 300(開箱)
: e, {5 {/ @. aERT 300 Manual
: z; x0 J. B* k" x& A2 LThe right tension for every type of player
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7 I  a. k+ a/ s" Q3 uDynamic 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)
, {; M9 t( j0 Q2 y3 \7 bDT determines the playing characteristics power and control.
Higher DT for more control / Lower DT for more power
5 R4 v% A# F$ H- s: p2 n$ x/ V, a5 |9 A, JNot 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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Lo     DT 28-34      Defensive play / Club
: \- d# n# ?5 z3 X3 aMid    DT 35-41      Dynamic,offensive play / Club,WTA
Hi      DT 42-46      Fast,aggressive play / Club , WTA , ATP
! P; s- N# a  d8 i9 z8 {; `5 h2 _Hi+    DT 47-54     Very fast,extremely aggressive play / ATP
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1 g1 C/ V" c$ c+ M0 Z2 |3 iWithin the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.

: W# b( ?) _7 p# v+ `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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henrylin424

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! b$ m$ [& P& qGamma ATS ERT 300 Tenniscomputer
5 F( X; u& t6 K5 bTW上售價169美金,海外運費36美金