ADXL345 manual reset

Hi,

I'm currently in sketching part of the device that I'm trying to realize, so I need some advices about this sensor.
For example, I will set conditions for X and Y axis values, and when the reading are in desired range, device have to perform some action.
But, if device is moved to another place, axis readings will be different and device will not work as it should.
So, is there any way to "manually" set it axis readings to zero?
I mean, to set axis values to zero in my sketch, so whenever device restars readings start from these values, or something like that?
Sorry for maybe stupid question, but currently I'm waiting to my sensor arrive so I can't try anything...

Thanks in advance...