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b) Incorrect wiring alarm
Measurement socket monitoring is integrated into the DMM. If
the test leads are connected to the wrong sockets (which can be
dangerous for the user and damage the DMM), the DMM triggers
an acoustic and optical alarm.
As soon as the test leads are inserted into the current measure-
ment sockets and another measurement mode (excluding current
measurement) is selected, the DMM emits a piercing warning
sound. This is also the case if the measurement input between
the 10 A socket (F) and mAµA socket (E) is swapped.
If the alarm is triggered and "LEAd" appears on the display, check
that the leads are connected to the correct sockets 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 sockets are con-
nected as follows:
Measurement
V/mV/Ω/°C°F/Hz%/
mode
/
Connected
mA/µA//10A
sockets
Interrupt the test setup immediately in the event of an alarm and check that the correct measure-
ment mode/measurement connection has been selected. The display also indicates the correct
measurement sockets to use for each measurement range.
mA/µA
/
10A
A
mA/µA
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