Measuring Current - VOLTCRAFT VC-337 Bedienungsanleitung

b) Measuring current
Never exceed the maximum permitted input values. Never touch circuits or parts of circuits when
they may contain voltages greater than 33 V/ACrms or 70 V/DC! Fatal hazard!
The maximum permissible voltage in the current measuring circuit against ground potential must
not exceed 600 V in CAT II or 300 V in CAT II.
Pay attention to the necessary safety information, regulations and protective measures for your
own safety.
Disconnect all measuring leads from the measuring instrument.
The current is measured via the current clamp (1). The sensors in the current clamp detect the magnetic field created
by current-carrying conductors. You can take measurements on insulated and uninsulated conductors. Make sure the
conductor is centred through the current clamp and the clamp is always closed.
Do not use the current clamp to surround more than one conductor. If the supply and return conductors
(e.g. L and N) are measured, the currents will cancel each other out and no measurement will be displayed.
If several supply conductors (e.g. L1 and L2) are measured, the currents will be added together.
At low currents, the conductor can be wound around one side
of the current clamp to increase the total measured current.
Divide the measured current by the number of coils. You will
then receive the correct current value.
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