Siemens Mag5000 connected with datalogger

Hallo, everyone, I nedd your advice. A have already connected siemens MAG5000 output pulse with data logger. I wanted to record the flow value to the logger. But the flow data in logger not same with the meter. ( Flow in meter 200 l/s; flow in data logger 80 l/s). Any suggestion

Check the gain/bias values or similar parameters in the data logger and set them accordingly.