GAMMA ERT 300 User Manual

Page 3

1. Clip the ERT 300 in the center of the string bed
2. Push the button
3. After a few seconds read out the values determing the playing characteristics

How to measure the string bed stiffness

Hold the racquet at throat as shown

During the measurement hold the racquet steady, do
not touch or put down the racquet

Clip the ERT 300 in the center of the string

bed

The 3 claws hold the device parallel to the strings by
gentle spring tension (jump one cross string).

Push button to start the DT test

The ball impact is simulated electronically
(gentle vibrations).
The exact readings are displayed after 6...8 seconds.
(The device switches-off automatically)

DT-range / Power and aggressiveness of play

Example: Mid, dynamic and offensive play

DYNAMIC TENSION DT

Example: 38 DT

String tension kp, lbs.

To be read out at the DT-disc (page 38)

Important: The ERT 300 Tennis computer must be clipped at the center of the string
bed. If it is placed outside the center, e.g. towards the top or bottom, the measured
value will change. Normally in such a case the stringing appears to be tighter. This
corresponds to the reality. We however are interested in the impact zone. Variations
can also occur as a result of incorrect or defective stringing. For exact comparative
measurements (rechecks) the ERT 300 must always be applied to exactly the same
point, count or mark the strings.

Instructions