Compensation Of Earth Electrode Connecting Lead - Fluke 1625-2 User Manual

Compensation of Earth Electrode Connecting Lead

If the line resistance to the earth electrode cannot be ignored, a compensation of the
connecting lead resistance to the earth electrode is possible.
Measuring process:
Figure 10. Compensation of Earth Electrode Connecting Lead
To do a compensation:
1. Turn central rotary switch to position "R
2. Wire instrument as shown in Figure 10.
3. Call display R
4. Implement compensation with "START TEST" button.
The compensation resistance is displayed only for as long as the "START TEST" button
is kept pressed. After releasing the "START TEST" button the measured value is stored
and the measuring instrument returns to the standard settings at the beginning of the
measurement so that a succeeding measurement of the earthing resistance can be
implemented by pressing "START TEST" again. Thereafter, R
actual measured value.
If the compensation value has to be reset to the basic setting (0.000 Ω), the
compensation sequence has to be implemented with an open (disconnected) measuring
lead or turn the switch to the next position and back.
Earth
electrode
with "DISPLAY MENU" button.
K
3pole".
E
is subtracted from the
K
Earth/Ground Tester
Advanced Operation
Auxiliary
earth
electrode
edw019.eps
31