Voltage Measurements; Current Measurements; Temperature Measurements - Velleman DVM205AM Manual Del Usuario

2. Press the REL(ative) button to store the reading in the display and the REL indication will appear on
the display.
3. The display will now indicate the difference between the stored value and the measured value.
4. Press the REL button to switch the relative function off and return to normal operation.
d) Data Hold / Backlight Button (fig. p.2 #5)
The data hold function allows the meter to "freeze" a measurement for later reference.
1. Press the DATA HOLD button to freeze the reading on the display. The HOLD indication will be
displayed.
2. Press the DATA HOLD button again to return to normal operation.
Press the button for more than 2 seconds to switch the display backlight on or off.
e) Mode Button (fig. p.2 #6)
Use the Mode button to select AC/DC voltage, AC/DC current, resistance, diode, continuity or capacitance
check.
f) °C/°F Button (fig. p.2 #7)
The °C/°F button is used to switch between °C and °F when measuring temperature.
The default temperature unit is °C.
6. Operating Instructions
1. Set the selection switch to the OFF position when the device is not being used. In order to prevent
battery leakage, the device automatically powers down when it has not been used for approx. 15
minutes.
2. If "OL" appears in the display during a measurement, the value exceeds the selected range. Select a
higher range.
3. When a low voltage range is selected, the display may show a varying reading although the leads are
not connected to a device or circuit. This is normal and is caused by the high input sensitivity. The
reading will stabilize and give a proper measurement when connected to a circuit.
a) Voltage Measurements
1. Plug the black test lead in COM (fig. p.2 #10) and the red test lead in the + connector (#11).
2. Set the selection switch (#8) to the Vdc/ac position and press MODE (#6) to select AC or DC voltage.
3. Put the leads over the load to be measured and read the measured value from the LCD.
NOTE: Pressing the Hz/% button will cause the display to switch to frequency or duty cycle.
b) Current Measurements
CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds every 15
minutes. Exceeding 30 seconds may cause damage to the meter and/or the test leads.
1. Plug the black test lead in the COM jack (#10) and the red test lead in the + jack (11) for max.
400mA measurements, or in the 10A jack (#9) for max. 10A measurements.
2. Set the selection switch (#2) to the desired current measuring position (µA, mA or A).
3. Press MODE (#6) to select AC or DC current.
4. Put the leads in series with the load under test and read the measured value from the LCD.
NOTE: Pressing the Hz/% button will cause the display to switch to frequency or duty cycle.
c) Resistance / Diode / Continuity / Capacitance Measurements
CAUTION: To avoid electric shock, make sure all power of the circuit to be measured is off and all
capacitors are fully discharged when measuring resistance or capacitance.
1. Plug the black test lead in COM and the red test lead in the + connector (#11).
2. Set the selection switch (#8) to the Ω
3. Press the MODE button to select Ω,
4. Connect the test leads to the component or circuit to be measured and read the measured value from
the LCD.
5. When testing continuity, a beeping sound shall be heard if the resistance is <30Ω.
6. When measuring the forward voltage across a diode, a normal diode will indicate 0.4V or 0.7V. The
reverse voltage will indicate "OL" (same as in open condition). A short-circuited diode will have a
0mV reading.
d) Frequency or Duty Cycle Measurements
1. Plug the black test lead in COM and the red test lead in the + connector (#11).
2. Set the selection switch (#8) to the Hz/%duty position.
3. Press the Hz/% button to select "Hz" or "%".
4. Connect the test leads to the circuit under test and read the frequency or the duty cycle on the
display.
e) Temperature Measurements
1. Insert the type K thermocouple in the appropriate sockets: negative plug in COM, positive plug in +.
2. Set the selection switch (#2) to °C/°F.
3. Press the °C/°F button to select °C or °F.
05.01.2010
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