Contacted Current Measurement Up To 600 Ma - VOLTCRAFT VC292 Bedienungsanleitung

12.9 Contacted current measurement up to 600 mA

Never exceed the maximum permitted input values. Do not touch
any circuits or circuit components if the circuit has voltages higher
than AC 30 Vr.m.s, 42.4 V peak or DC 60 V. Danger of death!
The voltage in the measured circuit must not exceed 600 V.
Always start contacted current measurement with the highest
measurement range and switch down to lower ranges if necessary.
Before connecting the multimeter and before changing the
measurement range, always de-energise the circuit. All current
measurement ranges are provided with fuses and thus protected
against overload.
Never measure currents above 600 mA in the mA/µA range as this
will cause the PTC protection elements to trip.
The µA/mA measurement input has a self-resetting PTC fuse, which
means that you do not need to replace the fuse in the event of an
overload.
Perform the current measurement in the mAµA measurement range as
quickly as possible. Continuous measurements are to be avoided. The
PTC technology heats the protective components in the measurement
circuit with increasing current strength or measurement duration. Conse-
quently, the internal resistance increases and the current flow is limited.
Please take this into account when performing series of measurements.
An optical and acoustic alarm are triggered when the measurement
range is exceeded.
If the PTC fuse has been triggered (steadily declining measurement in-
dicator, "OL" or alarm), stop the measurement and switch the DMM off
(OFF). Wait for approx. 5 minutes. The self-resetting fuse cools down and
then functions again.
When the meter is being used for mA/µA measurement, but the meter is
mistakenly connected to a high-energy high-voltage power supply, then
the ceramic tube fuse will work and probably blow to protect the meter. In
such case, the blown ceramic tube fuse is required to be replaced by a
new one.
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