VOLTCRAFT LSG-4 - Voltage Measurement (V); Resistance Measurement (Ω)

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 Priortoworkingwiththemeasuringdevice,yoursthavetoinserttheenclosedbatteries.Insertingand
changing the battery is described in the chapter “Maintenance and cleaning”.
b) Voltage measuring “V”
1Proceed as follows to measure DC voltages “V DC”:
• Turn the DMM on and select measuring range “V DC”.
• Plug the red measuring lead into the V measuring socket (8) and the black
measuring lead into the COM measuring socket (7).
• Now connect the two measuring prods to the object to be measured (bat-
tery, switch etc.). The red measuring tip indicates the positive pole, the black
measuring tip the negative pole.
• The polarity of the respective measuring value is indicated on the display
together with the current measuring value.
As soon as a minus “-” appears for the direct voltage in front of the
measuring value, the measured voltage is negative (or the measuring
tips have been mixed up).
• After measuring, remove the measuring leads from the measuring object and turn the DMM off.
2Proceed as follows to measure AC voltages “V AC”:
• Turn the DMM on and select measuring range “V AC”. “AC” appears on the display.
• Plug the red measuring lead into the V measuring socket (8) and the black measuring lead into the
• COM measuring socket (7).
• Now connect the two measuring prods to the object to be measured (generator, switch etc.).
• The measuring value is indicated on the display
• After measuring, remove the measuring leads from the measuring object and turn the DMM off.
c) Resistance measurement “Ω”
Make sure that all the circuit parts, switches and components and other objects of measurement are dis-
connected from the voltage and discharged.
1Proceed as follows to measure the resistance:
• TurntheDMMonandselectmeasuringrange“Ω”.
• PlugtheredmeasuringleadintotheΩmeasuringsocket(8)andtheblackmeasuringlead
into the COM measuring socket (7).
• Check the measuring leads for continuity by connecting both measuring prods with one
another. After that the resistance value must be approximately 0 to 0.5 Ohm (inherent
resistance of the measuring leads).