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m) 3-Phase rotating direction display "Motor"
The DMM may identify the rotating direction in a 3-phase current network via the measuring function “Motor”. Only 2
measuring lines are needed to display the rotating direction. During identification, the outer conductors L1, L2 and L3
must be scanned in sequence. The DMM recognises the phase offset and shows the rotating direction (rotating field)
with an arrow subsequently.
The 3-phase rotating direction display can be chosen only in the AC-V-range.
Proceed as follows to identify the 3-phase rotating direction:
- Turn the DMM on and select measuring function ”Motor”.
The display shows “AC” and the unit “V”.
- Plug the red measuring line into the V measuring jack (E)
and the black measuring line into the COM measuring jack
(D).
- Keep the button “SELECT” pressed for approx. 2 s. Two
beeps are output and the lock icon (H19) will flash. The
automatic measuring range setting is deactivated and the
600 V-range is selected. The display will show approx. 0.0
V
- Connect the black measuring prod to the outer conductor
L3. This connection remains unchanged throughout the
test. Connect the red measuring prod to the outer conduc-
tor L1.
- Once the meter recognises two outer conductors, the nor-
mal voltage will be displayed and the lock icon will remain
lit.
- Now switch the red measuring prod to outer conductor L2
within 5 seconds. If the time for measuring point change
is exceeded, the DMM will interrupt the measurement and
the function must be restarted.
- The meter will evaluate the phase offset of the three sub-
sequently determined outer conductors at correct meas-
uring point change of the red measuring line, and display
the rotating direction via two symbols in the display. The
arrow direction of the symbols shows the respective rotat-
ing direction:
Clockwise = right turning
Counter-clockwise = left-turning
- For another measurement push the button “SELECT” once
briefly. To deactivate the function, keep the “SELECT” but-
ton pushed for at least 2 seconds.
- Remove the measuring lines from the object to be meas-
ured after completion of the measurement and switch off the DMM.
The function buttons “RANGE”, “MAX MIN”, “REL” and “PEAK” are deactivated in this measuring function
and cannot be selected.
