Measuring Current (A) - VOLTCRAFT VC272 Bedienungsanleitung

12.5 Measuring current (A)

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.
Measurements greater than 6 A must only be made for a maximum
of 30 seconds in 15-minute intervals.
Always start the current measurement with the largest measurement
range and switch to a smaller range 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.
Do not measure any currents above 10 A in the 10A range and no
currents above 600 mA in the mA/µA range, otherwise the fuses
trigger.
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 a series of measurements.
An optical and acoustic alarm is triggered when the measurement range
is exceeded.
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.
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.
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