How to increase fping timeout on per device basis?

Hello,
We have a site where devices takes longer time to respond (ping rtt 2000-2500ms) and due to this we are receiving false alarms (Device status changed to Up/Down from icmp check.).
I would like to know if there’s a way how to increase fping timeout only on per device (or per location) basis. So far I have found only “Device -> Edit -> Misc -> Disable ICMP Test?”.
Thanks in advance