4
RMO100G Functionality
• Do not use RMO100G without the extra protective ground (PE) cable set connected. Always establish
this connection as the first one before you do any other connections, and separate this connection as
the very last one.
Operator Qualifications
• Testing with RMO100G should only be carried out by authorized and qualified personnel.
• Personnel receiving training, instruction, direction or education on the RMO100G should remain under
the constant supervision of an experienced operator while working with the test set and the test object.
Power Supply
• Supply RMO100G only from a power outlet that is equipped with protective ground.
• Instead of supplying RMO100G from phase – neutral (L1-N, A-N), it may also be supplied from phase
– phase (e.g., L1-L2; A-B). However, the voltage must not exceed 240 V AC, please refer to section
Technical Data.
Warning
This is a class A product. In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
3 Designated Use
The Micro OhmMeter RMO100G is designed for measuring contact resistances of non-inductive test
objects used in the electric power industry or similar branches. It is employed for resistance
measurement during manufacturing, commissioning and testing of:
power circuit breakers,
interrupters,
bar installation,
cable splices,
welded joints,
grounding.
Any other use of the RMO100G than the ones mentioned above is to be considered improper and will
not only invalidate all customer warranty claims but also exempt the manufacturer from its liability for
repair or exchange.
4 Functionality
4.1 Single Test
The RMO100G generates a filtered (true) DC current and outputs it in an automatically regulated current
ramp. The current increases with a constant slope from zero up to a set maximum value. When the
current has reached its maximum, RMO100G measures the resistance of the test object. After test the
output current ramps back down to zero with a constant slope. By sloping the current up and down,
magnetic transients are virtually eliminated.
4.2 Continuous Test
RMO100G can generate DC current continuously using the
Contin
menu. In this menu the current can
be chosen the same way like in the
Single
menu, but the duration of the test can be preset. The test is
started pressing the
START
button. By pushing
Ω
button current test result is stored in internal memory.
During the test, a new result is shown on the display and stored into the PC (DV-Win) approximately
each second. Using DV-Win the result can be printed like an Excel table which later can be shown as a
diagram and used for a report.
Test is completed when the test time previously set in the menu has elapsed, or when the
STOP
button is
pressed.
