Instrument Controls www.megger.comDLRO2 and DLRO2X18First measurement is complete. The Difference Meter is now active. The first measurement is shown as a green ring at the centre of the scale with +0% below. A second measurement is made, the Difference Meter shows result relative to reference measurement (+30% in this case) showing an increase. Shown as a blue ring NOTE : For each successful measurement the needle leaves a blue marker on the Difference Meter (a red marker if the reading contains noise).Third measurement is made, the Difference Meter shows it’s result relative to the first (>+1000% in this case) showing an increase. The 1000% difference shows clearly that something isn’t right. Check the leads, connections, unit under test, etc.NOTE : The units on the main display have changed from μΩ to mΩ and are now indicated in blue to highlight the change.Fourth measurement is made, the Difference Meter shows it’s result, again relative to the first measurement. The new reading is -1% showing a possible return to the expected result.NOTE : The units on the main display have changed back to μΩ and are shown in blue indicating another change.Fifth measurement is made, the Difference Meter shows it’s result, relative to the reference measurement. This reading is now just -1% lower than the reference measurement.NOTE : NThe units remained unchanged as μΩ and are shown in black.
