H) Contactless Clamp Current Measurement " A - VOLTCRAFT VC281 TRMS Bedienungsanleitung

h) Contactless clamp current measurement "
Never exceed the maximum permitted input values. Do not touch any circuits or circuit compo-
nents if the circuit has voltages higher than 33 V ACrms or 70 V DC. Danger of death!
The voltage in the measured circuit must not exceed 600 V.
Pay attention to the necessary safety information, regulations and protective measures for your
own safety.
The "clamp current measurement" measurement range is a high-impedance range and can only be
used with the "CLA60" clamp transformer. Direct measurement is not permissible.
Through a clamp transformer (current clamp), the DMM enables the measurement of direct and alternating currents
up to 60 A. Measurement is carried out contactlessly using a fold-out clamp current sensor. For clamp measurement,
the current circuit does not need to be disconnected.
The sensors in the current clamp detect the magnetic field created by current-carrying conductors. You can take
measurements on insulated and uninsulated conductors. Always ensure that the conductor passes through the centre
of the current clamp (pay attention to the arrow marks) and that the clamp is closed.
The clamp transformer can be used for direct and alternating current measurements. 10 mV per measured ampere is
output at the output.
The measurement is indicated on the display in amperes. Conversion as with conventional adapters is not required.
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.
The slide switch (X) of the clamp transformer also works as battery replacement indicator. If the
switch flashes in the "ON" position or does not light up, the batteries must be replaced immedi-
ately, otherwise measurement errors may occur.
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