Thanks for the responses, much appreciated. I have solved the first problem, during the summer I had to put the standard settings back in. On mine for the rain bucket, it has three calibrations ie 0.01inch, 0.1mm and 0.2mm. I had selected 0.1mm in error. I not convinced I have the metric measurement adapter, if this is the case then it will be measuring in 0.01 inch increments ie 0.254mm. Which will make it closer to the correct value in my calibration exercise.