MI 3102(H) BT
Eurotest
XE
Measurements
39
5.4
Resistance of earth connection and equipotential
bonding
The resistance measurement is performed in order to ensure that the protective measures
against electric shock through earth connections and bondings are effective. Two sub-functions
are available:
R LOWΩ - Earth bond measurement according to EN 61557-4 (200 mA) and
CONTINUITY - Continuous resistance measurement performed with 7 mA.
selection for
instructions on key functionality.
Figure 5.11
: 200 mA RLOW Ω
Test parameters for resistance measurement
Test
Resistance measurement sub-function
[R LOWΩ, CONTINUITY]
Limit
Maximum resistance
[OFF, 0.1
Ω ÷ 20.0 Ω]
Additional test parameter for
Continuity sub-function
Buzzer
On (sound if resistance is lower than the set limit value) or Off
Additional key:
HELP
Click
Calibrates test leads in Continuity functions.
Keep pressed for 1s
Enters Help screen
5.4.1
R LOWΩ, 200 mA resistance measurement
The resistance measurement is performed with automatic polarity reversal of the test voltage.
Test circuit for R LOWΩ measurement
Figure 5.12: Connection of 3-wire test lead plus optional extension lead
