Transistor Hfe Test; Dc Voltage Measurement; Dc Current Measurement - Velleman DVM850BL Manual Del Usuario

5.5. RESISTANCE
Range
200Ω
2kΩ
20kΩ
200kΩ
2MΩ
Maximum open circuit voltage : 3.2V
Overload protection : 250Vdc or rms ac for all ranges.

5.6. TRANSISTOR hFE TEST (0-1000)

Range
NPN & PNP
6. OPERATING INSTRUCTIONS

6.1. DC VOLTAGE MEASUREMENT

1. Connect the red test lead to the "VΩmA" 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.

6.2. DC CURRENT MEASUREMENT

1. Connect the red test lead to the "VΩmA" 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 IN SERIES.
4. Read the current value and the polarity of the red lead connection on the LCD display
Resolution
0.1Ω
1Ω
10Ω
100Ω
1kΩ
Tested range
0-1000
Accuracy
±0.8% of rdg ± 2 digits
±0.8% of rdg ± 2 digits
±0.8% of rdg ± 2 digits
±0.8% of rdg ± 2 digits
±1.0% of rdg ± 2 digits
Tested current
Ib = 10µA
Tested voltage
Vcd = 3V