LEARN TO USE THE TOOL MEASURE (MULTI TESTER) & REPAIR

Skala Multimeter

How to Use a Multimeter1. Measure the DC voltageo Set the selector to the position of DCV.o Select the scale limits based on an estimate of the voltage measurement to be in check, if the voltage is in check around 12volt then set the position of the scale in the limit of measuring 50V.o To measure the voltage of the unknown magnitude of the measuring set limits on the multimeter to the highest position is not damaged.o Connect the multimeter probes or stick to the point of tension that will be checked, the red probe to the position of (+) and black probe to the point (-) can not be reversed.o Read the measurement on the multimeter.

2. Measure the AC voltageo Set the selector to the position of ACV.o Select the scale limits based on an estimate of the voltage measurement to be in check, if the voltage is in check around 12volt then set the position of the scale in the limit of measuring 50V.o To measure the voltage of the unknown magnitude of the measuring set limits on the multimeter to the highest position is not damaged.o Connect the multimeter probes or stick to the point that the voltage will be checked. Installation should be reversed multimeter probe.o Read the measurement on the multimeter.3. Strong measure DC currentso Set the selector to the position of DCA.o Select the scale limits based on an estimate of the current measure to be in check, for example: the current in check around 100mA then set the position of the scale in measuring 250mA or 500mA limit.o Pay attention to the correct maximum limit of strong currents that can be measured by the multimeter because if it exceeds the limit of the fuse (fuse) on the multimeter will drop out and can not be used while the multimeter and the fuse (fuse) should be replaced first.o Installation of a multimeter probe is not the same as the current DC and AC voltage measurements, because measuring the flow means we cut off one power supply connection to the load current to be checked, and then make the multimeter as a liaison.o Connect the red multimeter probe on the output voltage (+) power supply and probe (-) on the input voltage (+) of the load / circuit to be checked for current usage.o Read the measurement on the multimeter.4. Measuring the resistance value of a fixed resistoro Set ohmmeter selector on position.o Select the scale limits based on the measured value of the resistor to be measured.o Limit ohmmeter measure is usually preceded by X (times), meaning that the appointment of a needle will be multiplied by the multiplier numbers within the limits of measuremento Connect the multimeter probes on both ends of the resistor should be reversed.o Read the measurement on the multimeter, make sure the multimeter designation equal to the value indicated by color band resistor.5. Measuring the resistance value of a variable resistor (VR)o Set ohmmeter selector on position.o Select the scale limits based on the measured value of the variable resistor (VR) to be measured.o Limit ohmmeter measure is usually preceded by X (times), meaning that the appointment of a needle will be multiplied by the multiplier numbers within the limits of measurement.o Connect the multimeter probes on both ends of the resistor should be reversed.o As you read the gauge on the multimeter, rotary / slide position and confirm the appointment of a variable resistor to change in accordance with the multimeter needle VR round.6. Check for short circuit / connectiono Set ohmmeter selector on position.o Select the scale measuring the limit X 1 (times one).o Connect the multimeter probes on both ends of the wire / terminal connections to be checked.o Read the measurement on the multimeter, the smaller the value of resistance indicated the better connectivity.o If the needle does not point to the possibility multimeter wires or terminals is broken.7. Checking the diodeo Set ohmmeter selector on position.o Select the scale measuring the limit X 1K (one kilo = X times 1000).o Connect the multimeter probe (-) at the anode and the probe (+) at the cathode.o If a LED diode is checked then the limit measure on X1 and when checked, the LED will light.o If the multimeter pointing to a specific number (usually around 5-20K) diode means good, if not broken break point means a diode.o Remove the probe and connect the multimeter probe (+) at the anode and the probe (-) at the cathode.o If the needle does not point multimeter (not moving) means the diode is good, if the move means the diode is defective leaking through the cathode-anode.8. NPN transistor checko Set ohmmeter selector on position.o Select the scale measuring the limit X 1K (one kilo = X times 1000).o Connect the multimeter probe (-) at the base and the probe (+) on the collector.o If the multimeter pointing to a specific number (usually around 5-20K) transistor means good, if not broken break point means the transistor BC.o Remove the probe and connect the multimeter probe (+) at the base and the probe (-) on the collector.o If the needle does not point multimeter (not moving) means a good transistor, if the move means the transistor is damaged leaking through BC.o Connect the multimeter probe (-) at the base and the probe (+) on the emitter.o If the multimeter pointing to a specific number (usually around 5-20K) transistor means good, if not broken break point means the transistor BE.o Remove the probe and connect the multimeter probe (+) at the base and the probe (-) on the emitter.o If the needle does not point multimeter (not moving) means a good transistor, if the move means the transistor is damaged leaking through BE.o Connect the multimeter probe (+) on the emitor and the probe (-) on the collector.o If the needle does not point multimeter (not moving) means a good transistor, if the move means the transistor is damaged leaking through CE.o Note: check the multimeter probe (-) on the emitor and the probe (+)  collector not required.9. Check the PNP transistoro Set ohmmeter selector on position.o Select the scale measuring the limit X 1K (one kilo = X times 1000).o Connect the multimeter probe (+) at the base and the probe (-) on the collector.o If the multimeter pointing to a specific number (usually around 5-20K) transistor means good, if not broken break point means the transistor BC.o Remove the probe and connect the multimeter probe (-) at the base and the probe (+) on the collector.o If the needle does not point multimeter (not moving) means a good transistor, if the move means the transistor is damaged leaking through BC.o Connect the multimeter probe (+) at the base and the probe (-) on the emitter.o If the multimeter pointing to a specific number (usually around 5-20K) transistor means good, if not broken break point means the transistor BE.o Remove the probe and connect the multimeter probe (-) at the base and the probe (+) on the emitter.o If the needle does not point multimeter (not moving) means a good transistor, if the move means the transistor is damaged leaking through BE.o Connect the multimeter probe (-) on the emitter and the probe (+) on the collector.o If the needle does not point multimeter (not moving) means a good transistor, if the move means the transistor is damaged leaking through CE.o Note: check the multimeter probe (+) on the emitter and the probe (-) on the collector is not required.10. Checking the electrolyte capacitor (Elko)o Set ohmmeter selector on position.o Select the scale limits for measuring X-1 above the value of 1000uF Elko, X 10 to the above for the 100uF-1000uF Elko, Elko X 100 for the value of 10uF-100uF and X 1K 10uF for the Elko below.o Connect the multimeter probe (-) in the feet (+) Elko and the probe (+) at the foot of (-) Elko.o Make sure the multimeter needle moves to right until a certain value (depending on the value of Elko) and then returned to its original position.o If the needle moves and not back then certainly Elko leak.o If the needle does not move the Elko dry / no leads.