I will tell you now the whole problem about the measurement task, maybe you can give me better support. I have to control one contact of a relay, as starting point of the measure I have the digital relay control signal. When the control signal is going to high I should measure the time to the point when the signal from the contact is going to low. Also I have to check if the contact signal is low over the whole time to the next trigger pule from the control signal. The control signal is a 12V DC voltage, the signal from the contact is 50V AC voltage, The device is a PicoScope 6402 and I am working with LabView 2011. I am sure that these measurement task can be done with the device but now I am trying about 2 Weeks to do these but something I do wrong. Please help me you are my last chance.