Velleman DVM851 - Manual (Page 7)

DVM851
01.08.2012 7
9.3 AC VOLTAGE
Do not measure circuits that may contain voltages > 600V
Range Resolution Accuracy
200V 100mV
± 1.2% of rdg
600V 1V
Frequency range: 40Hz to 400Hz.
9.4 DIODE & CONTINUITY
Do not conduct diode- or continuity measurements on live circuits.
Range Description
If continuity exists (less than 60 Ω ), built-in buzzer will sound
Displays the diode's approx. forward voltage drop
9.5 RESISTANCE
Do not conduct resistance measurements on live circuits.
Range Resolution Accuracy
200 Ω 0.1 Ω
± 0.8% of rdg
2k Ω 1 Ω
20k Ω 10 Ω
200k Ω 100 Ω
2M Ω 1k Ω ± 1.0% of rdg
Maximum open circuit voltage : 3.2V
9.6 TRANSISTOR hFE TEST (0-1000)
Do not conduct transistor measurements on live circuits. For transistor test use the
included adaptor socket.
Range Tested range Tested current
NPN & PNP 0-1000 Ib = 10µA
10. Operating instructions
10.1 DC VOLTAGE MEASUREMENT
Do not measure circuits that may contain voltages > 600V
Use extreme caution when measuring voltages higher than 60Vdc or 30Vac rms.
Always place your fingers behind the protective edges of the test probes while measuring!
1. Connect the red test lead to the "V Ω mA" jack and the black lead to the "COM" jack.
2. Set the rotary switch in the desired DCV position. If the voltage to be measured is unknown
beforehand, you should set the range switch in the highest range position and then reduce gradually
until the ideal resolution is obtained.
3. Connect the test leads to the source being measured.
4. Read the voltage value on the LCD display along with the polarity of the red lead connection.
10.2 DC CURRENT MEASUREMENT
Do not measure current in circuits with voltages > 250V
Use extreme caution when measuring voltages higher than 60Vdc or 30Vac rms.
Always place your fingers behind the protective edges of the test probes while measuring!
1. Connect the red test lead to the "V Ω mA" jack and the black test lead to the "COM" jack (switch the
red lead to the "10A" jack for measurements between 200mA and 10A).
2. Set the rotary switch (DCA) in the desired position.
3. Open the circuit in which the current is to be measured and connect the test leads to the circuit
SERIES.
4. Read the current value and the polarity of the red lead connection on the LCD display
©Velleman nv
Accuracy
1.2% of rdg ± 10 digits
or continuity measurements on live circuits.
in buzzer will sound
lays the diode's approx. forward voltage drop
Accuracy
0.8% of rdg ± 2 digits
1.0% of rdg ± 2 digits
Do not conduct transistor measurements on live circuits. For transistor test use the
Tested voltage
Vcd = 3V
Use extreme caution when measuring voltages higher than 60Vdc or 30Vac rms.
the test probes while measuring!
mA" jack and the black lead to the "COM" jack.
Set the rotary switch in the desired DCV position. If the voltage to be measured is unknown
ch in the highest range position and then reduce gradually
Read the voltage value on the LCD display along with the polarity of the red lead connection.
Use extreme caution when measuring voltages higher than 60Vdc or 30Vac rms.
Always place your fingers behind the protective edges of the test probes while measuring!
mA" jack and the black test lead to the "COM" jack (switch the
current is to be measured and connect the test leads to the circuit IN
Read the current value and the polarity of the red lead connection on the LCD display