Velleman MMPR1 Uživatelský manuál stáhnout pdf (Strana 7)

5.5. RESISTANCE

Range Resolution Accuracy

200Ω 0.1Ω

0.8% of rdg ± 2 digits

2kΩ 1Ω

0.8% of rdg ± 2 digits

20kΩ 10Ω

0.8% of rdg ± 2 digits

200kΩ 100Ω

0.8% of rdg ± 2 digits

2MΩ 1kΩ

1.0% of rdg ± 2 digits

Maximum open circuit voltage : 3.2V

Overload protection : 250Vdc or rms ac for all ranges.

5.6. TRANSISTOR hFE TEST (0-1000)

Range Tested range Tested current Tested voltage

NPN & PNP 0-1000 Ib = 10µA Vcd = 3V

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

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Velleman MMPR1 Uživatelský manuál Strana 7