H) Taking Current Measurements - VOLTCRAFT VC271 TRMS Bedienungsanleitung

h) Taking current measurements

Never exceed the maximum permitted input values. Never touch circuits or circuit components if
they may carry voltages greater than 33 V/ACrms or 70 V/DC! This may cause a fatal electric shock!
The voltage in the measured circuit must not exceed 600 V.
Measurements greater than 6 A must only be made for a maximum of 10 seconds in 15-minute
intervals.
Always start each measurement using the largest measuring range, and then switch to a smaller
range if necessary. Always disconnect the circuit before connecting the multimeter and changing
the measurement mode. All measurement ranges are protected against overload.
Do not measure any currents above 10 A in the A range or currents above 200 mA in the mA/µA
range, as this will trigger the fuses.
The µA/mA input has a resettable PTC fuse, meaning that you do not need to replace the fuse in the
event of an overload.
Current measurements in the mAµA range should be made as quickly as possible. Avoid taking measure-
ments for prolonged periods. Due to the PTC technology, increasing currents/prolonged measurements
cause the protective components in the circuit to increase in temperature. This increases the internal resist-
ance and restricts the current flow. Bear this in mind when taking a series of measurements.
An optical and acoustic alarm is triggered when the measurement range is exceeded.
If the PTC fuse is triggered (the measurement steadily decreases, "OL" appears on the display or the alarm is trig-
gered), stop the measurement and switch off the DMM. Wait for approximately 5 minutes for the resettable fuse to
cool down and reset itself.
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