Velleman DVM870 Bedienungsanleitung PDF herunterladen (Seite 8)

DVM870 Rev. 01

04.02.2010 ©Velleman nv

Range Resolution

Range Resolution Range Resolution

200µA 0.1µA 20mA 10µA 10A 10mA

2mA 1µV 200mA 100µA

RESISTANCE

• Connect the red test lead to the "VΩmA" jack [9] and the black test lead

to the "COM" jack [7] (the red lead has a positive polarity "+").

• Set the rotary switch [3] in the "Ω" range position.

• Connect the test leads to the resistor to be measured and read the LCD

display.

• If the resistance being measured is connected to a circuit, turn off the

power and discharge all capacitors before applying the test probes.

Note:

wait a few seconds for a stable reading when measuring resistors >

1M.

Range Resolution

Range Resolution Range Resolution

200 0.1 20K 10 2M 1k

2k 1 200k 100 20M 10k

DIODE TEST AND AUDIBLE CONTINUITY TEST

• Connect the red test lead to "VΩmA" jack [9] and the black one to the

"COM" jack [7] (the red lead has a positive polarity "+").

• Set the rotary switch [6] in the position and use the select button

[3] to choose between diode or continuity test. Do not apply input

voltage at this setting!

• For diode tests, connect the red test lead to the anode of the diode to be

tested and the black test lead to the cathode of the diode. The approx.

forward voltage drop of the diode will be displayed. If the connection is

reversed, the display will show “OL”.

• For continuity tests, connect the test leads to two points of the circuit to

be tested. If continuity exists, the built-in buzzer will sound.

Notes:

forward DC current: ±0.5mA

backward DC voltage: ±1.5V

open circuit voltage: ±0.5V

buzzer sounds when resistance < 50

TEMPERATURE

• Set the rotary switch [6] in the °C/°F position and use the select button

[3] to choose between °C and °F. Do not apply input voltage at this

setting!

• Insert the cathode (black pin) in the "COM" jack [7], and the anode (red

pin) in the "VΩmA" jack [9].

• Use the other end of the thermocouple to measure temperatures.

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