I bought velleman sound level datalogger (DVM173SD) from amazone.fr. I received it without calibration certificate. The compagny I’m working is asking for this certificate. Please could you help me to get this certificate. I could pay by credit card.
Hi
Please use this contact form to request support for this kind of product
https://www.velleman.eu/support/contact/?product=384492
Best Regards,
VEL337