METREL EasiPLUS MI 3000 User Manual

MI 3000 EasiPLUS Measurements
26
5.2 Continuity
Two continuity sub-functions are available:
 RLow, 200mA continuity test with automatic polarity reversal
 Low current (ca 7mA) continuous continuity test, useful when testing inductive
systems (e.g. motors, see section 5.2.2 for more details).
5.2.1 R LowΩ test
This function is used to test the resistance between two different points of the
installation to ensure that a conductive path exists between them. The test ensures that
all protective conductors, earth conductors or bonding conductors are correctly
connected, terminated and have the correct resistive value.
The measurement of the Low resistance is performed with a test current of more than
200mA. An automatic pole reversal of the test voltage and the test current is performed
during the test. This test checks for any components (e.g. diodes, transistors, SCRs)
that may have a rectifying effect on the circuit which could cause problems when a
voltage is applied.
This measurement completely complies with EN61557-4 regulations
How to perform a Low resistance measurement
Step 1 Select the Continuity function with the function selector switch and the sub-
function with the / keys. The following menu will be displayed:
Figure 5.4: Low  resistance measurement menu
Step 2 Set the following limit value:
 High limit resistance value.
Step 3 Connect test cable to the EasiPLUS instrument. Before performing an Low
resistance measurement, compensate for the test leads resistance as follows:
1. Short test leads first as shown in figure 5.5.
N
/
L
2
L
/
L
1
L
/
L
1
P
E
/
L
3
N
/
L
2
P
E
/
L
3
p
rolongation lead
Figure 5.5: Shorted test leads

METREL EasiPLUS MI 3000 Specifications

General

Brand	METREL
Model	EasiPLUS MI 3000
Category	Test Equipment
Language	English