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Voltcraft VC271 SE Manual

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46
b) Incorrect wiring alarm
The DMM automatically detects which terminals are connected to
the test leads. If the test leads are connected to the wrong terminals
(which can be dangerous for the user and damage the DMM), the
DMM triggers an acoustic and optical alarm.
If you switch to another measurement mode (except current mode)
when the test leads are connected to the terminals, the DMM triggers
an alarm. The alarm is also triggered when the measuring input is
switched from the 10 A terminal to the mAµA terminal.
If the alarm is triggered and “LEAd” appears on the display, check that
the leads are connected to the correct terminals and that you have
selected the correct measurement mode.
The diagram shows an example of incorrectly connected leads that
need to be reconnected.
The multimeter triggers the alarm when the terminals are connected
as follows:
Measurement mode
V/Ω/
/
mA/µA/ 10 A
Connected terminals
mA/µA/
/10 A
10 A
mA/µA/
If the alarm is triggered, check that you have selected the correct measurement mode and that the cables
are connected to the correct terminals. The correct terminals are indicated on the display for each meas-
urement range.
c) AC voltage mode (“V ”)
Follow the steps below to measure V/AC voltages:
- Switch on the DMM and select the “V
” measurement mode.
“AC” and “V” will appear on the display.
- For lower voltages up to max. 400 mV, select the “mV
” meas-
uring range.
- Plug the red lead into the V terminal (G) and the black lead into the
COM terminal (H).
- Connect the two measuring probes in parallel to the object that
you want to measure (e.g. generator or circuit).
- The measurement will appear on the display.
- After taking a measurement, remove the leads from the measured
object and switch off the DMM.
The “V/AC” range has an input resistance of ≥10 MΩ.
This means that there is almost no load on the circuit.
… 46 …


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