12
4. A resistance reading will be displayed on the LCD display as shown in
Figure 4.
Figure 4: Two point resistance reading
Note:
The test voltage used to make resistance measurements is a.c. and
because of this may not suitable for continuity testing in accordance with
local regulations.
Three-terminal ground rod resistance measurement (DET3TC,
DET3TD, DET4TD)
Figure 5: Connections for measuring three-terminal ground rod resistance
To measure the ground noise voltage:
1. With the selector switch set to the ‘OFF’position, connect the
instrument as shown in Figure 2.
2. Set the selector switch to the ground noise voltage setting marked ‘V’.
3. The ground noise voltage reading will be displayed on the LCD display
as shown in Figure 3.
Figure 3: Ground noise voltage reading
Two-terminal resistance measurement (DET3TC, DET3TD,
DET4TD)
1. With the selector switch in the ‘OFF’ position connect the instrument as
shown in Figure 2, but connected to the part of the installation you wish
to test
2. Set the selector switch to the 2 point resistance measurement setting
marked ‘2P’.
3. Press and release the TEST button [by pressing and holding the TEST
button, the resistance measurement will be continually updated and
displayed].
Earth electrode
(rod) under test
Earth electrode
(rod) under test
Earth
electrode
(rod)
under test
Current
spike
Current
spike
Current
spike
Potential
spike
Potential
spike
Potential
spike
DET4TD
