VOLTCRAFT 1665555 Bedienungsanleitung Seite 55

Proceed as follows to measure direct currents (A
- Turn on the DMM using the rotary switch (13) and select the measuring range "A
display shows "A" and the symbol for direct current "
- In the direct current measuring range, a low current may be shown in the display due to the
high sensitivity and the ambient magnetic field (i.e. the Earth's magnetic field, etc.) even if the
clamp is closed. You must manually set the display to zero directly prior to each measurement
or when changing a power cable. Perform a zero adjustment without the conductor and with
the clamp closed. To do so, briefly push the ZERO key. A beep sounds and the display shows
"ZERO" to confirm the zero adjustment. Each time you push the ZERO key, the display is
zeroed. Push and hold the ZERO key for approx. 2 seconds to deactivate this function. The
display no longer shows the ZERO symbol. The device is now in normal measurement mode
without zero adjustment.
- Push the open lever (4) to open the current clamp.
- Heed the correct polarity of the clamp for direct current
measurement. The polarity symbols are visible on the
front and back of the clamp. When the connection is
correct, the cable leads from the current source (+)
through the front of the clamp to the load.
- Clamp the individual conductor to be measured and
reclose the clamp. Position the conductor in the middle
of the two triangular position symbols on the clamp.
- The display shows the measurement.
When in direct current measurement a minus sign "-" precedes the measurement, the
current is traveling in the opposite direction (or the clamp is inverted).
- Remove the clamp from the measuring object and turn off the device after measurement.
Turn the rotary switch to "OFF".
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VC-590OLED SE
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