... line for relay, dry contactVibration signal inputChannelsMax.16 Channels, 8,12,16 Optional8,12,16 OptionalSynchronous measurementsynchronous sampling at 4 channels,synchronous sampling ... , Rectangle window Averaging typeLinearity, peak hold Averaging times1,2,4,8,16,32,64 Process informationChannels8, Isolation inputSignal range±12V or ...