GAMMA ERT 300 - Manual

All string materials start loosing tension after the racquet is strung through repeated
impacts and through aging even if it has not been used
Restring the racquet when the DT-value has decreased
by 10% to maximum 20%
Never play tennis when the DT-value below 28 !
(Low ball control, risk of tennis elbow and back problems)
Technical data ERT 300 TENNISCOMPUTER
Field of application Tennis racquets
Dynamic system Electronic simulation of ball impact
Measuring of the resonance frequency Converting the string bed stiffness DT
DYNAMIC TENSION DT 20...65 DT (kp/cm; Newton/mm)
Accuracy +/- 1 kp/cm (+/- 1 digit)
Display Measurement 4...6 sec., Display 8 sec.
Dimensions 110 x 50 x 25 mm
Weight 50 g
Ambient temperature 5...45˚ Celsius / 40...115˚ Fahrenheit
Relative humidity 20%...80% (not waterproof)
Batteries 2 x CR 2032 coin type
Replace batteries when battery sign appears in display.
Caution: Do not loose the tiny screws.
Always use a proper desk top. plus pole up
All rights reserved
BEERS Technic GmbH
Professional Sports Equipment
CH-6330 Cham, Switzerland
www.beers-technic.ch
Know when to restring
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