Conrad Electronic ME-42 Operating Instructions Manual
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Conrad Electronic ME-42 Operating Instructions Manual

Conrad Electronic ME-42 Operating Instructions Manual

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Version
Digitalmultimeter
D
M E - 4 2
Seite 4 - 34
Digital Multimeter
M E - 4 2
Page 35 - 64
M E - 4 2
Page 65 - 98
M E - 4 2
Best.-Nr. / Item-No. / No de commande / Bestnr.:

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Summary of Contents for Conrad Electronic ME-42

  • Page 1 Version Digitalmultimeter M E - 4 2 Seite 4 - 34 Digital Multimeter M E - 4 2 Page 35 - 64 M E - 4 2 Page 65 - 98 M E - 4 2 Best.-Nr. / Item-No. / No de commande / Bestnr.:...
  • Page 2 Diese Bedienungsanleitung geh6r-t zu diesem Produkt. Sie bung. Achten Sie darauf, such wenn Sie dieses Produkt an Dritte weitergeben. Bewahren Sie deshalb diese Bedienungsanleitung zum Nachlesen auf.! Eine Auflistung der lnhalte finden Sie im lnhaltsverzeichnis mit Angabe der entsprechenden Seitenzahlen auf Seite 7. These operating instructions belong with this product.

  • Page 4: Introduction

    Introduction Dear Customer, With the Digital Multimeter ME-42 you have acquired a new-gene- ration measuring instrument built to the latest technological Stan- dards. Construction complies with DIN VDE 0411, part 1 for measu-. ring instruments = EN 61010-I. In addition it has been EMC-te- sted (for domestic use) and fulfils the requirements of the ap- plicable national and European directives.

  • Page 5: Intended Use

    Intended use of the Digital Multimeter ME-42: DC voltage measurement up to a maximum of 1000 VDC AC voltage measurements up to 750 VAC rms max Measurement of DC and AC current up to max. 20 A, for a max. of...

  • Page 6: Operating Elements (Fold-Out Page)

    Operating elements (for illustration see page) Unit “ON/OFF” (see also 53.2) This push button is used to switch the digital multimeter on and off. The DMM is ready for operation shortly after switching on. (data hold) button = captures the measured value. Holding/switching through the measurement ranges = manual range selection Rotary switch (= measuring function switch) for setting the...

  • Page 7: Table Of Contents

    Range hold means the measurement range is not switched au- tomatically (auto range), but by hand, manually 1 4 -<- = diode test 15 ((a)) = symbol for acoustic continuity test 16 AC = symbol for alternating voltage or current II I II = minus sign, or symbol for negative polarity 18 = Battery symbol...

  • Page 8: Safety Instructions

    Safety information Damage resulting from non-observance of this manual renders void any claim under the guarantee! We accept no responsibility for consequential damage. We accept no responsibility for damage to property or injury to per- sons caused by improper operation or failure to obsen/e the safety instructions.
  • Page 9 In commercial facilities the accident-prevention regulations of the Industrial Employers’ Liability Association for electrical sys- tems and equipment must be observed. In schools, training facilities, hobby and self-help workshops, the handling of measuring instruments must be supervised responsi- bly by trained personnel. When effecting replacements, it must be ensured that only fuses of the specified type and specified current rating are used.
  • Page 10 instrument is not set to the current measuring range. Before every change in measuring range, the test leads or adap- ter must be removed from the object being measured. Before each measurement check your measuring instrument and test leads for damage. For measurements, only use the test leads which are supplied with the measuring instrument.

  • Page 11: Presentation

    PC becomes possible. The 3 3/4-digit liquid crystal display (LCD) allows resolutions of up to a maximum of 3 digits after the decimal point. The Digital Multi- meter ME-42 can be used universally in hobby, educational and (non-industrial) commercial applications, etc.

  • Page 12: Handling, Putting Into Service

    Handling, Putting into operation A Installation of batteries - changing batteries For the measuring instrument to function perfectly, it must be fitted with a 9V battery. When the change-battery symbol appears in the display, the batteries must be replaced. .Proceed as follows: Disconnect the unit from the circuit being measured, remove the measuring leads from the measuring instrument, switch it off and...
  • Page 13 The supplied connecting leads are suitable for voltages up to 1000 V max. The Digital Multimeter ME-42 is designed for voltages to 1000 VDC max. or 750 VAC rms max. Take particular care when dealing with voltages greater than 25 V AC or 35 V DC.
  • Page 14 2 Button assignments The “ON/OFF” button (1) switches the instrument both on and off: press the button once and the unit will be switched on; press it a second time and it will be switched off. In addition a so-called Auto Power Off circuit is incorporated which automatically switches the instrument off after approx.
  • Page 15 Attention! The measuring function switch must not on any ac- count be positioned on voltage measurement (=-V) during current measurement. b) mA socket For DC or AC current measurement up to 400 mA maximum, the red test lead must be plugged in here when the measurement function switch (4) is set either to 4mA or 400mA during current measurement.
  • Page 16 = AC voltage measurement (auto range) Ohm ((+)) = Continuity testing and resistance measurement (auto range) -<- = Diode test (no auto range) = DC current measurement to 4 mA max. (no auto range range) = DC current measurement to 20 A max. (no auto range) = AC current measurement to 20 mA max.
  • Page 17 C 5 Operating modes, display details and symbols a) Diode test The value displayed during diode test is the forward voltage at the approx. 1 mA test current. The measuring range here is 0 to approx. 2.0 V. b) Continuity testing In continuity testing, the continuity of voltage-free leads, plug-in connections or fuses can be checked both acoustically and opti- cally.
  • Page 18 An alkaline 9V battery in this measuring device lasts on average approx. 100 hours. About 8 hours before the battery becomes empty, the “change battery” indicator appears in the display. A battery check is performed in between each individual measu- ring cycle.

  • Page 19: Performing Measurements

    Performing measurements A DC voltage measurement Attention! Never exceed the maximum permissible input le- ..: . y : . : ..: : . vels, not even when measuring superimposed di- rect voltages (e.g.
  • Page 20 B AC voltage measurements ..A . : . Attention! . . . , ; . I : : ‘ _ : : Never exceed the maximum permissible input le- vels, not even when measuring superimposed di- rect voltages (e.g.
  • Page 21 surement input automatically to the AC voltage present, i.e. the required measurement range is selected automatically. 3. Connect the test probes to the test object (load, circuit, etc.). 4. The respective polarity of the measured value is shown in the display, together with the present measured value.
  • Page 22 Attention! Do. not measure any currents in circuits in which voltages greater than 250 VDC or VACrms can oc- cur, to avoid damaging the measuring device and endangering life as a result. Never measure cur- rents over 20 A. Measure only in circuits themselves fused at 16 A and in which no power greater than 4000 VA can occur.
  • Page 23 Attention! Do not measure any currents in circuits in which voltages greater than 250 VDC or VACrms can oc- cur, to avoid damaging the measuring device and endangering life as a result. Never measure cur- rents over 20 A. Measure only in circuits themselves fused at 16 A and in which no power greater than 4000 VA can occur.
  • Page 24 F Resistance measurement Attention! Ensure that all circuit elements, circuits and com- ..I . , . , . ponents and other objects to be measured are ab- solutely voltage-free. To perform a resistance measurement, proceed as follows: Connect the black test lead to the COM socket and the red test lead to the V/Ohm socket.
  • Page 25 G Diode test To measure diodes or semiconductor paths, proceed as follows: I. Connect the black test lead to the COM socket and the red test lead to the V/Ohm socket. 2. Set the rotary switch to ‘- I<-” and connect the test probes to the . object to be measured, a voltage-free semiconductor path, with the red test probe to the anode and the black test probe to the cathode (which is usually indicated by a coloured ring, spot or si-...
  • Page 26 BLACK PROBE Cathode Mark H Using the analogue bar graph The bar graph is easy to operate and understand. It is comparable with the pointer of an analogue measuring instrument without its mechanical disadvantages. It is particularly suitable for fast-chan- ging measured signals, for which the digital display is too “slow”.
  • Page 27 Now switch on the measuring device and the computer. b) Using the optional software (not supplied with the multimeter) The MS DOS program is called METEX and is stored under GRA- PHIC on a floppy disk. The Windows program is called Scopeview and is stored under SCOPE on another floppy disk.
  • Page 28 5. . To start the program, type METEX and confirm with Enter. Note! To stop the program or should errors occur, “warm boot” the computer (Ctrl+Alt+Del). The use of Windows software is described below: Attention! The following steps presuppose basic knowledge of .

  • Page 29: Disposal

    Rectification of faults With the Digital Multimeter ME-42 you have acquired a product built to the latest technological standards. However, problems or faults can arise. Because of this, the following describes how some of these problems can be resolved by the user relatively easily;...

  • Page 30: Service And Calibration

    Fault Possible cause No current measure- Fuses for the current ranges O.K.? ment possible Are the test leads making good contact in their sockets? Are the test leads in the A or uA/mA socket and COM? No display when Is the battery exhausted? unit switched on Has the measuring instrument switched itself off after 15 minutes of no activity?

  • Page 31: Technical Data And Measurement Tolerances

    Changing a fuse is described under 3. Safety requirements. Chan- ging the battery can be found under 5.1. To clean the unit or the display window, use a clean, lint-free, anti- static, dry cleaning cloth. Attention! Do not use any carbonaceous cleaning agents or .
  • Page 32 Measurement tolerances Accuracy specified in *(% of reading + number of digits) Accuracy over 1 year at a temperature of +23”C rt5K, at a relative humidity of less than 75 %. The warm-up time is 1 minute. Operating Measurement Accuracy Resolution mode range...
  • Page 33 Test current 1.5 mA max. (at 1 kOhm) Diode test Test voltage 2.0 VDC max. acoustic signal with resistances Continuity test: lower than 50 Ohm Maximum input quantities, overload protection : 1000 VDC or 750 VAC Voltage measurement : 20 A AC / DC in the A range, 30 Current measurement seconds duration max.
  • Page 34 The operating instructions reflect the current technical specifications at time of print. We reserve the right to change the technical or physical specifications. N o t e d e Cette notice est une publication de la sock% Conrad Electronic GmbH, Klaus-Conrad- reproduction, quel que soit le type, par Toute exemple photocopies microfilms ou saisie dans des traitements de texte electronique est soumise 8 une autorisation prealable &rite de I’editeur.

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