5
RMO500 Functionality
4 Functionality
4.1 Single Test
The RMO500 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,
RMO500 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
RMO500 can generate DC current continuously using the
Cont
menu. In this menu
the current can be chosen the same way like in the
Sing
menu, but the duration of
the test can be preset. The test is started pressing the
Ω
button. During the test, a
new result is shown on the display and stored into the PC (RMOWin) each second.
Using RMOWin 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.
By pushing
STOP
button test could be performed at any time. In case of test
interruption by pushing the
STOP
button, the last measured result will remain saved
in the internal memory.
Upon expiry of the selected test lasting time, the last result remains saved at
selected memory location.
Note:
At the start of the test (Single and Continuous), a check of cables
connection is done. In case of disconnection, an alarm is activated, and the
error message is shown on the display.
Voltage sense cables disconnection, occured during the test, will cause an
erroreous result. The display will not show this asan error message.
During tests the high continued DC current will heat up the test set. To
prevent RMO500 from overheating, duty cycles apply. The duty cycles
depend on the used test current, please refer to section "Duty Cycles".
