Resistance; Transisitor Hfe Test (0-1000); Operating Instructions; Dc Voltage Measurement - Velleman LAB-1 Handbuch

5.

RESISTANCE

Range
200Ω
2kΩ
20kΩ
200kΩ
2MΩ
Maximum open circuit voltage : 3.2V
Overload protection : 250Vdc or rms ac for all ranges.
6. TRANSISTOR hFE TEST (0-1000)
Range
NPN & PNP

OPERATING INSTRUCTIONS

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.
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
3.

AC VOLTAGE MEASUREMENT

1. Connect the red test lead to the "VΩmA" jack and the black test lead to the "COM" jack.
2. Set the rotary switch in the appropriate ACV position.
3. Connect the test leads to the source to be measured.
4. Read the voltage value on the LCD display.
4. RESISTANCE
1. Connect the red test lead to the "VΩmA" jack and the black test lead to the "COM" jack (the red lead has a
positive polarity "+").
2. Set the rotary switch in the appropriate "Ω" range position.
3. Connect the test leads to the resistor to be measured and read the LCD display.
4. If the resistance being measured is connected to a circuit, turn off the power and discharge all capacitors
before applying the test probes.
Resolution
0.1Ω
1Ω
10Ω
100Ω
1kΩ
Tested range Tested current
0-1000 Ib = 10µA
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 voltage
Vcd = 3V
Digital multimeter
9