Current Measurement; Resistance Measurement; Continuity Buzzer - Monacor DMT-4004 Manual De Instrucciones

5.2 Current measurement

G
The current to be measured must not ex-
ceed 10 A!
G
Currents between 1 A and 10 A must not be
measured for more than 30 seconds, other-
wise the meter and the test leads may be
damaged.
1) For measurements up to 400 mA, connect
the red test lead to the jack µA/mA (5); for
measurements between 400 mA and 10 A,
connect it to the jack 10A (4). In case of un-
known currents, start the measurement with
the 10 A range as a precaution.
Caution! Never make a voltage measure-
ment when the test lead is connected to the
jack µA/mA or 10A, otherwise the meter and
the voltage source may be damaged.
2) According to the current to be measured,
set the selector switch (10) to the following
position:
Current measured
< 4000 µA
4 – 400 mA
400 mA – 10 A
3) After switching on, the direct current meas-
urement will always be activated: The dis-
play (6) will indicate "DC" at the top on the
left. For alternating current measurements,
switch over to the indication "AC" with the
button MODE (3). The button MODE also al-
lows to return to the direct current measure-
ment.
4) Insert the meter via the test leads into the
circuit to be measured and read the meas-
ured value on the display. If, for direct current
measurements, the red probe tip is applied
to the negative pole and the black tip to the
positive pole, a minus sign will precede the
measured value.
If the current measured exceeds the
admissible value of the measuring range,
warn ing signals will sound and "OL." (over-
load) will appear on the display. In this case,
select the next higher range.
5) During an alternating current measurement,
the button Hz% (2) allows to switch over to
frequency measurement and duty cycle
measurement, however, the input sensitivity
will not be as high and the frequency range
will not be as large as that for a measure-
Position
µA
mA
10A
ment in the position Hz% of the selector
switch.
Measuring range Sensitivity
400 mA~ ≥ 45 mA
10 A~ ≥ 4 A
To return to alternating current measure-
ment, press the button Hz% once or twice
so that the display will indicate "AC" and "A",
"mA", or µA" again.

5.3 Resistance measurement

G
Never measure a resistor when voltage is
applied, and always measure it separately,
otherwise the measurement will be inaccu-
rate. For this purpose, it may be necessary
to solder it out of the circuit.
Set the selector switch (10) to the position Ω
and apply the probe tips to the resistor. Read
the resistance value on the display. As long as
there is no resistor between the probe tips or
the probe tips are not shorted, the display will
show "OL." to indicate an infinitely high value.

5.4 Continuity buzzer

The continuity buzzer is used for checking if
current flows without interruption.
G
Never perform a continuity test when volt-
age is applied, otherwise the meter may be
damaged and the measurement will be in-
accurate.
1) Set the selector switch (10) to the position
. At the top of the display the symbol
for diode test will appear.
2) Switch over to continuity test with the button
MODE (3). At the top of the display the
buzzer symbol
3) Apply the probe tips to the corresponding
measuring points. If the resistance between
the points is less than 40 Ω, the continuity
buzzer will sound. The resistance value will
be indicated on the display up to 400 Ω; in
case of higher values, the overload indica-
tion "OL." will appear.
Frequency range
5 Hz – 5 kHz
5 Hz – 1 kHz
will appear.
GB
15