DVM345DI GB
5
4.7. Diode Test
1. Connect the black test lead to the "COM"-
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-jack. The
polarity of the red test lead is positive (+).
2. Place the function switch in the "
"-position.
3. Connect the red test lead to the anode and the black test lead to the cathode of the diode to
be tested.
4. The forward voltage drop of the diode will be displayed on the LCD.
4.8. Transistor Test
1. Place the function switch in the "hFE"-position.
2. Determine whether the transistor is NPN or PNP and locate the emitter, base and collector
leads. Insert the leads into the proper holes of the hFE-socket on the front panel.
3. The display will show the approximate hFE-value at the moment of testing. Base current
10µA, Vce 3.0V.
WARNING :
Disconnect all test leads from the circuit to be tested before connecting the transistor with the
hFE-socket. Make sure that no components are connected to the hFE-socket when performing
voltage measurements with test leads.
4.9. Interfacing the Meter with a PC
1. Run the RS232C-cable from the computer
's serial ports to the meter.
2. Press "ON/OFF" to activate the meter and turn on the computer.
WARNING :
1. Only use a RS232C serial interface cable. Do not attempt to modify the length of this cable.
2. Please read the information on the supplied disk.
5. SPECIFICATIONS
Max. accuracy is achieved during a one-year period after calibration. Ideal circumstances
require a temperature of 18 to 28°C (64 to 82°F) and a max. relative humidity of 75%.
5.1. General Specifications
Max. Voltage between
Terminals and Earth Ground : 1000VDC or 750 Vrms AC (sine wave)
Power Supply
: 9V-battery (NEDA1604 or 6F22)
Ranging Method
: Auto/Manual
Display
: 3 ¾ digit LCD, 38-segment bar graph
Overrange Indication
: "OL" appears on display
Polarity Indication
: "-" is displayed automatically
Battery-Low Indication
: The "
"-symbol is displayed
Operating Temperature
: 5 to 35°C (41 to 95°F)
