Megger DET4TR2 - Page 44

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6. Press and release the TEST button [by holding the TEST button, the resistance measurement will
be continually updated].
7. The instrument will perform pre-measurement check, the status of which will be indicated on the
display.
8. The three-terminal resistance with lead-null reading will be displayed as shown in Figure 26.
Figure 26: example three-terminal resistance with lead-null reading
(DET4 display shown)
Note:
 The instrument will display the warning triangle and an excessive noise voltage indicator if the ground
noise voltage is above 40 V pk-pk (14 Vrms).
 The instrument will display the warning triangle and a voltage over-range condition if the ground
noise voltage is above 100 V – no resistance reading is possible under this condition.