And if you are testing the tension in a strung racket the size of the head, string, pattern, vibration dampening devices, among other things may make the tension appear to be non linear. There is not just one way to test tension in a strung racket. You usually have to include all those variables in order to get accurate readings.
When you're dead you don't know you're dead. It's the same way when you're stupid.
Balance - 31.0 cm, Weight - 358 g, SW - 346 Kgcm^2