Monacor DMT-2004, Instruction Manual

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For measurements up to 200 mA, set the switch (4) to one of the three
ranges “A
DC
”. For measurements exceeding 200 mA to 10 A, connect the
red test lead to the jack “10A” (5) and set the switch to the position “10A”.
Insert the meter via the test leads into the circuit to be measured and read
the measured value on the display. If the red test tip is applied to the neg-
ative pole and the black tip to the positive pole, there will be a minus sign
in front of the value displayed.
5.3 Measuring resistances
G
Never measure a resistor when voltage is applied; always measure it
separately, otherwise the measurement will be inaccurate. For this pur-
pose, it may be necessary to solder it out of the circuit.
Set the selector switch (4) to one of the ranges “Ω”. Apply the test tips to
the resistor and read the value on the display.
If there is no resistor between the test tips or if the resistor value is
≥ 2 MΩ, “1” will be displayed.
5.4 Testing the continuity
G
Never test the continuity when voltage is applied, otherwise the meas-
urement will be inaccurate.
The continuity test will check the current flow for interruption. Set the se-
lector switch (4) to the position
. Apply the test tips to the measuring
points. The resistance value (up to 1999 Ω) will be displayed. If it is
smaller than 20 Ω approx., the internal buzzer will sound.
If the circuit is open, “1” will be displayed.
5.5 Testing diodes
G
Never measure a diode when voltage is applied; always measure it
separately, otherwise the measurement will be inaccurate. For this pur-
pose, it may be necessary to solder the diode out of the circuit.
Set the selector switch (4) to the position . Apply the black test tip to
the cathode of the diode and the red test tip to the anode. With a meas-
urement current of 1 mA max., the forward voltage up to 1.999 V will be
displayed.
If a value around 0 V is displayed, the diode has a short circuit.
If “1” is displayed, the diode is interrupted, reverse-biased (reverse the po-
larity of the diode) or has no contact to the test tips.
16
GB