Velleman DCM267N - Manual (Page 5)

DCM267N
00 (04/11/2008) 5 Velleman ®
AC/DC VOLTAGE MEASUREMENT
• Connect the red test lead to the "V Ω °C/°F" jack [10] and the black lead
to the "COM" jack [9].
• Set the rotary function switch [3] in the position.
• Use the mode button [5] to choose between AC and DC voltage.
• Connect the test leads parallel to the source being measured.
• Read the voltage value on the LCD display [8] along with the polarity of
the red lead connection.
AC CURRENT MEASUREMENT
• Make sure no test leads are connected to the “V Ω °C/°F” [10] or “COM”
[9] jacks.
• Set the rotary switch [3] in the desired range (40A, 400A or 1000A). If
the current to be measured is unknown beforehand, set the range switch
in the highest range position and then reduce gradually until the ideal
resolution is obtained.
• Press the trigger [2] to open the jaws [1] of the clamp. Enclose a single
conductor within the clamp and release the trigger [2]. Enclosing
multiple conductors at the same time will result in faulty measurements.
• Read the current value on the LCD display.
RESISTANCE, AUDIBLE CONTINUITY, DIODE and CAPACITY TEST
• Connect the red test lead to the "V Ω °C/°F" jack [10] and the black lead
to the "COM" jack [9].
• Set the rotary switch [3] in the " " position.
• For resistance test and continuity test, press the mode button [5] until
the “Ω” symbol appears in the display. Connect the test leads to the
resistor to be measured and read the value in the LCD display.
Disconnect one side of the device under test to avoid interference from
the rest of the circuit. When the resistance is <100Ω, a continuity buzzer
will sound.
• For diode measurements, press the mode button [5] until the " "
symbol appears in the display. When the diode passes the test, indicated
forward voltage will be 0.4~0.7V while reverse voltage will indicate “OL”.
When the diode is short circuited, both readings will be ±0mV; when
open, both measurements will shown “OL”.
Notes: forward DC current: ±0.3mA
open circuit voltage: ±1.5V
• For capacity measurements, press the mode button [5] until “F” is shown
in the display. Warning: disconnect power to the device under test
(including batteries!) and discharge all capacitors before measuring
capacitance. Connect the test leads to the capacitor to be measured and
read the value in the LCD display.
FREQUENCY or % DUTY CYCLE measurement
• Connect the red test lead to the "V Ω °C/°F" jack [10] and the black lead
to the "COM" jack [9].
• Set the rotary switch [3] in the "Hz·%" position. Select Hz or % duty
with the Hz - % select button [6], the selection is indicated in the
display.
• Connect the test leads to the circuit under test and read the value in the
LCD display.
TEMPERATURE
• Set the rotary switch [3] in the "°C·°F" position. Select °C or °F with the
mode select button [5], the selection is indicated in the display.