新西兰采购需求：燃气轮机流量计、液体涡轮流量计、涡轮流量计、流量计

I'm reaching out because I have a flow meter that resembles the one in the photo with three buttons. Unfortunately, I've misplaced the operation manual and need a replacement to help me navigate the button functions and menu options effectively. It would be great if you could send me a digital copy or any resources related to the operation of this meter. Your assistance will be very much appreciated, as it will enable me to use the device properly. Thank you!