B) Incorrect Measurement Socket Warning; C) Ac Voltage Mode "V - VOLTCRAFT VC281 TRMS Bedienungsanleitung

b) Incorrect measurement socket warning

Measurement socket monitoring is integrated into the DMM. If the
test leads are connected to the wrong sockets (which can be dan-
gerous 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 current clamp 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:
V/mV/Ω/Hz/
Measurement
mode
Connected mA/µA/
sockets
Interrupt the test setup immediately in the event of an alarm and check that the correct measurement mode/
measurement connection have been selected. The display also indicates the correct measurement sockets
to use for each measurement range.

c) AC voltage mode "V "

Proceed as follows to measure "V/AC" voltages:
- Switch the DMM on and select the "V
mode. "AC" and "V" will appear on the display.
- For lower voltages up to max. 600 mV, select the "mV
measurement range.
- Insert the red lead into the V socket (G) and the black lead into
the COM socket (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 meas-
ured object and switch the DMM off.
The voltage measurement range "V/AC" has an input
resistance of ≥10 MΩ. This (almost entirely) prevents
a load on the circuit.
mA/µA
/ /
A
A
A
mA/µA
" measurement
"
51