insulation resistance

Hello everyone! I am trying to build a sample device which needs to have inside a >21gigaohm and it has to pass a test, an insulation resistance tester applies 1000V DC and then it shows the resultant resistance. I already build one but unfortunately it didn't work. I connected in series 10G...

hi, Ove just had an eicr carried out, the engineer found a low insulation resistance reading on a circuiit with a pir sensor controlling a lamp. He queried whether those sensors can cause such a reading even if they arent faulty. Can anyone please tell me if thats the case ?