UK Different test results after DB change

[Welsh_sparky_21]

Is it common to get different test results when upgrading a db? Basically I done an EICR in November and came back to upgrade the db and done live tests on all the circuits, but my results were quite different. Like 0.30 ohms out on one circuit

 

[UNG]

A lot can depend on the environment the MFT was kept / transported to site in prior to the testing being carried out and if it was given time to acclimatise to the conditions of the premises being tested

This is one of the reasons why I'm not a fan of wholesalers on the day calibration events as it is difficult to produce accurate calibration results without the lab conditions to give a baseline to qualify the results to the required standard