Sound level datalogger calibration certificate

K8200 3D Printer K8200 - Wiring and electronics
1

I bought sound level datalogger (Velleman ref : DVM173SD from amazone.fr. I received ir without calibration certificate. I need this certificate as soon as possible. Please, can anyone help me ?

2

You should post your question in this link.
https://www.velleman.eu/support/contact/?product=384492