Fluke 1625 FE 1625 Users Manual - Page 51
Correcting Clip-on Transformer Errors, Press START TEST again.
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START TEST 1625 EARTH / GROUND TESTER H /C2 DISPLAY MENU Earth/Ground Resistance 300 k RA CHANGE ITEM 4 POLE 3 POLE 4 POLE 3 POLE AC Resistance 300 k R DC Low Resistance 3k R 2 POLE 2 POLE 4 POLE SELECT OFF S/P2 ES/P1 E /C1 Earth/Ground Tester Procedure of Measurements Figure 14. Correcting Clip-on Transformer Errors 2. Turn central rotary switch to position "A RE 3pole". 3. Press "START TEST"-button and note result of RE value. 4. Connect clip-on transformer. edw017.eps START TEST 1625 EARTH / GROUND TESTER H /C2 DISPLAY MENU Earth/Ground Resistance 300 k RA AC Resistance 300 k R DC Low Resistance 3k R 4 POLE 3 POLE 2 POLE 2 POLE CHANGE ITEM 4 POLE 3 POLE 4 POLE SELECT OFF S/P2 ES/P1 E /C1 5. Turn central rotary switch to position "A RE 3pole". edw018.eps 6. Press "START TEST" again. If the thus measured value RE deviates from the RE value determined without clip-on transformer by more than 5 %, adjust the clip-on transformation ratio (tr) correspondingly: trnew = trold × RE (withclip − ontransformer) RE (withoutclip − onTransfprmer) 43
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