Imprint Contact 868 Videos
900.000 Callings


Wheel change
Save Energy

Video Workshop Tester 1
Video Workshop Tester 2
Video Workshop Tester 3
Video Workshop Tester 4
Video Clean engine compartment
Video Multimeter
Video Clamp-on Ammeter
Video Alternator (Test)
Video Scanner 1
Video Scanner 2
Video Micrometer
Video Dial Gauge
Video Caliper Gauge
Video Oblique angle
Video Pulling Tools
Video Gaskets 1
Video Gaskets 2
Video Screws
Video Data for Monitoring
Video Leakage Test
Video On Board Diagnosis
Video ACC-control
Video Test Analyser
Video Compression Check 1
Video Compression Check 2
Video Loss in Pressure Test
Video RPM-Measuring
Video Fiberscope
Video Stethoscope
Video Refractometer
Video Magn field cur. sensor
Video Temperature measuring
Video Layer thickness
Video Microscope
Video Anemometer
Video Engine Test Bench
Video Perf. Measurement 0
Video Perf. Measurement 1
Video Perf. Measurement 2
Video Brake Test Stand 1
Video Brake Test Stand 2
Video Axle Alignment 1
Video Axle Alignment 2
Video Axle Alignment 3
Video Axle Alignment 4
Video Axle Alignment 5
Video Axle Alignment 6
Video Shock Absorber Test 1
Video Shock Absorber Test 2
Video Fault finding
Video Searching f. noises
Video Hoist
Video Separation
Video Wheel Balancing
Video Petrol Injection Signal
Video Trigger
Video Alternator Analysis
Video Voltage Regulation
Video Lambda Sensor
Video Mains voltage 1
Video Mains voltage 2

Video Workshop 1
Video Workshop 2
Video Workshop 3
Video Workshop test 1
Video Workshop test 2

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z



With a multimeter (even a simple one), one can find the reason for a number of electrical failures. It completely replaces the diode proof-lamp. In fact proof-lamps with electric light bulbs should be replaced anyway, because in integrated circuits, they do more damage than good. With a multimeter, one can not only find out if there is voltage, but also how much. Cables, plug-in connectors and coils (windings) can be checked for the passage of continuous voltage. Together with a thermometer, one can even get to the bottom of sensor behaviour.

ACAlternating CurrentWechselspannung
DCDirect CurrentGleichspannung
Always begin measuring with the instrument set to the highest range

How it works

There are two areas in the above shown multimeter with which, when using, one must exercise particular caution. If one uses, e.g. the ohm area (resistance), a voltage is laid onto the circuit to be examined by the multimeters own battery. This does not get on well with the perhaps existing voltage within the circuit. This voltage must be completely switched off. The multimeter reacts even more sensitively to current measurement in the milliampere range. If the current allowed here is exceeded, e.g., through direct contact of both measuring cables with a power source (battery), this part of the measuring instrument is gone for good.On the contrary, the voltage- (DCV) and 20 A current measurement (DCmA), have no problems with it at all. In addition, because in the automobile, almost only DC voltage is found, one can safely ignore the ranges 'ACV', 'ACA' and 'AcmA'. Only then, must the connection of the red measuring cable fit to the respective measuring range. The black cable should always be plugged into 'COM'. The individual prefixes are explained in formulary.

If one has done a little experimenting with the simple multimeter, one finds oneself wishing for a multimeter with better possibilities:
- multimeters which adjust themselves to the measuring range,
- (inductive) current measurement without opening the connection,
- the measurement of quickly changing voltages. 11/09               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

Our E-Book advertising