IPMonitor: How to do a "Force Test" on hundreds of machines at the same time?

Hello,

We got a failure of network for about 7 hours ... 300 machines went off the network and appeared as not responding Ping, CPU, Memory, Drives, Services, etc... on IP monitor. I would like to send a force test to all those machines as now they are online and working... I started to do the force test from the toolbar menu and it works perfectly but due to the number of monitors (at least 5 per machine) and 300 machines this could take for ever... Any powershell command available.

Thanks,

Dom