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Summary of Contents for Velleman DVM850BL
- Page 1 DVM850BL User Manual Gebruikershandleiding Manuel d’utilisation Gebrauchsanleitung...
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Page 2: Safety Symbols
F 200mA / 250V (Quick acting) • Do not use the device unless the back cover is in place and securely fastened. • Do not apply abrasives or solvents to the meter. Use a damp cloth and mild detergent for cleaning purposes. DVM850BL... -
Page 3: During Use
• Before attempting to insert transistors for testing, always verify if the test leads have been disconnected. • Components should not be connected to the hFE socket while test leads are being used to execute voltage measurements. • Never perform resistance measurements on live circuits. DVM850BL... -
Page 4: General Description
The device is a battery-operated, hand-held 3 ½ digital multimeter for measuring DC and AC voltages, DC current and resistance. It also offers the possibility of executing continuity tests and of testing diodes and transistors. The back light is optional. 4.1. FRONT PANEL DVM850BL... -
Page 5: Front Panel Description
Only figure "1" on the display Polarity indication "-" displayed for negative polarity Operating temperature 0 to 40°C Storage temperature -10°C to 50°C Low battery indication " " appears on the display Dimensions 138 x 69 x 31mm Weight Approx. 170g DVM850BL... -
Page 6: Diode & Continuity
Frequency range : 40Hz to 400Hz. Response : average, calibration in rms of a sine wave. 5.4. DIODE & CONTINUITY Range Description If continuity exists (about less that 1.5kΩ), built-in buzzer will sound Displays the diode's approx. forward voltage drop Overload protection : 250Vdc or rms ac DVM850BL... -
Page 7: Transistor Hfe Test
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 DVM850BL... -
Page 8: Ac Voltage Measurement
2. Determine whether the transistor under testing 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. Read the approximate hFE-value obtained under the following test conditions : a base current of 10µA and Vce 3V. DVM850BL... -
Page 9: Audible Continuity Test
Before attempting to open the case, verify if the test leads have been disconnected. Before using the meter, please remember to close the case and tighten the screws properly in order to avoid electroshocks. 9. ACCESSORIES • User manual • Set of test leads • Gift box • 9V battery • Holster DVM850BL...
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