It is presented a method for obtaining data for an Electrocardiogram, ECG, using a portable sensor device comprising two electrodes. The method comprising the steps of: receiving a trigger to obtain measurements for the ECG； setting at least one switch in a conducting state to close a connection between the two electrodes； setting the at least one switch in a blocking state to conductively separate the two electrodes； and capturing measurements for the ECG using the at least two electrodes.
