Test Modes; Normal Mode; Automatic Mode; Continuous Mode - Megger DLRO-10 Guide De L'utilisateur

TEST MODES

TEST MODES
DLRO 10 has 4 test modes which are selected by repeated presses of the
Mode button. At the end of each test, DLRO 10 will display the average of
the values obtained with forward and reverse current.
DLRO 10X has 5 modes. On DLRO 10X these modes are selected from the
TEST menu using the cursor control and Enter key. At the end of a test,
DLRO 10X will show three resistance values; that obtained with forward
current, that obtained with reverse current and the average value.

Normal mode

Normal mode makes a single measurement of the resistance of the sample
using forward and reverse current
Please note that in this mode both the current and voltage leads
must be connected across the test sample before the Test button
is pressed. To make another measurement, ensure the test leads
are connected and press the test button.

Automatic mode

If Automatic mode is selected, your instrument will remain in a state of
readiness waiting for both the current AND voltage measuring leads to
be connected to the test piece. When this is done, a forward and reverse
current test will be started automatically.
To make another measurement simply break contact with the test sample
and remake contact.
For example, if measuring joints in a long bus bar, you may leave the
current circuit connected at opposite ends of the bus bar. Simply making
contact with voltage probes across the joint(s) you wish to measure will
then activate the measurement.
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Continuous mode

Continuous mode requires the connections to be made before pressing
the Test button. Your instrument will then repeat its forward and reverse
measurements and display the results approximately every 3 seconds until
contact is broken or the Test button is pressed.
Inductive mode
DLRO 10 and DLRO 10X are able to make d.c. resistive measurements on
loads that exhibit an inductive component using the test mode indicated
by the inductor symbol on the DLRO 10, or by using the inductive mode
on the DLRO 10X.
When measuring inductive loads it is essential that the current
carrying leads are securely clamped to the item being tested and
that they are not removed before any stored charge has been
discharged at the end of the test. Failure to comply with these
instructions might result in an arc being produced, which might
be dangerous for the instrument and the operator.
Having selected inductive mode, connect all four leads to the item being
tested and press the Test button.
DLRO will check that all four leads are in adequate contact with the test
piece and will then apply a test current and try to find the correct range.
The display will show 1 - - followed by 1 - - - -. During this time you may
see the current range increasing or decreasing. On the DLRO 10 the "I"
lamp will flash and the message "Current Flowing" will appear on the
DLRO 10X display.
After a short time resistance readings will appear on the display, reducing
gradually over aperiod of time until eventually a stable reading will be
obtained.