Conrad Electronic ME-42 User manual

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Version 12/99
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Digitalmultimeter
ME-42 Seite 4
- 34
Digital Multimeter
ME-42 Page 35
- 64
Multimktre numbrique
ME-42 Page 65
- 98
G9 Digitale multimeter
ME-42
Pagina 99 - 129
Best.-Nr.
/ Item-No. / No de commande / Bestnr.:
12 01 30

0
D
Diese Bedienungsanleitung geh6r-t zu diesem Produkt. Sie
enthslt wichtige Hinweise zur lnbetriebnahme und Handha-
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.
0
GB
These operating instructions belong with this product. They
contain important information for putting it into service and
operating it. This should be noted also when this product is
passed on to a third party.
Therefore look after these operating instructions for future
reference!
A list of contents with page numbers can be found on
page 38.
F
Ce mode d’emploi appartient a ce produit. II contient des
recommandations en ce qui concerne sa mise en service et
samanutention. Veuillez en tenir
compte et ceci egalement
lorsque vous remettez le produit a des tiers.
Conservez ce mode d’emploi afin de pouvoir vous docu-
menter en temps utile.!
Vous trouverez le recapitulatif des indications du contenu i
la table des matieres avec mention de la page correspon-
dante h la page 68.
0
NL Deze handleiding
hoort bij dit product. Zij bevat belangrijke
aanwijzingen voor de inbedrijfstelling en de hantering.
Ne-
em deze aanwijzingen in acht, ook wanneer u dit product
aan derden doorgeeft.
Bewaar daarom deze handleiding zorgvuldig zodat u hem
later kunt raadplegen.!
Een opsomming van de inhoud met aanduiding van de
overeenkomstige paginanummering vindt u op pagina 102.
2

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Introduction
DearCustomer,
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. Conformance to the-
se has been proven; the relevant documents are lodged with
the manufacturer.
To maintain this condition and to guarantee safe operation, the
user must observe these operating instructions without fail!
:
In case of query, consult auf
Technical Advisory Service:
Germany: Tel. +49 (0) f 80 53121 19
Mon - Fri 08.00 to 18.00
Austria: Tel, +43
(0) 72 42
20 30
60
Mon - Thu 08.30
to 12.00, 13.00
to
f6.00
Fri 08.30 to f2.30
Switzerland: Tel, +4f (0)848 87 78 f f
Mon
- Thu 08.00 to f2.00, f3.00 to f 700
Fri 08.00 to
f2.00
35

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
30 s (protected)
Resistance measurement up to 40 MOhm max
Continuity testing and diode testing.
Measurements must not be performed under unfavourable ambient
conditions. Unfavourable ambient conditions include:
l wetness or excessive humidity,
l dust and combustible gases, fumes or solvents,
l thunderstorms or storm conditions producing strong electrosta-
tic fields, etc.
.-
Any use other than as described above can lead to damage to the
instrument; in addition this is accompanied by dangers such as
short circuit, fire, electric shock, etc. No part of the product must
be modified or converted! The safety instructions are to be follo-
wed without fail !

Operating elements (for illustration see fold-out page)
1
2
3
4
5
6
7
8
9
10
11
12
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.
“D-H” push button
(data hold) button = captures the measured value.
“R-H” push button
Holding/switching through the measurement ranges = manual
range selection
Rotary switch (= measuring function switch) for setting the
different operations (voltage measurement, current measure-
ment, etc.).
20 A input
This measuring input is protected with a 20 A fuse and is suita-
ble for DC and AC currents up to max. 20 A (max. 30 s durati-
on with 15 minute pause between measurements).
mA input
This input is for measuring DC and AC currents up to 400 mA
max. (protected with a quick-blow 800mA fuse)
COM (0) input socket (COM or negative connection)
V-Ohm-(+) input socket (= positive connection)
Multifunction LCD display
(3-?&-digit, greatest indication: 3999) with
Analogue bargraph
Bar graph sub-graduations
Overload display
When “OL” appears in the display and an acoustic signal so-
unds, this means overflow = range exceeded (no acoustic sig-
nal during resistance measurement, diode test or temperature
measurement).
Attention!
Observe the maximum input levels.
37

13a “R-H” Range Hold
Range hold means the measurement range is not switched au-
tomatically (auto range), but by hand, manually
13b ‘ID-H” Data Hold
14 -<- = diode test
15 ((a)) = symbol for acoustic continuity test
16 AC = symbol for alternating voltage or current
17
II I II
= minus sign, or symbol for negative polarity
18
= Battery symbol
If this symbol appears in the display, the battery must be chan-
ged
19 Various units of measurement
Contents
Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Intended use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36
Operating elements (fold-out page) ................................................ 37
Contents .........................................................................................
38
Safety instructions .......................................................................... 39
Presentation
....................................................................................
42
Handling, putting into service
.........................................................
43
Performing measurements
.............................................................
50
Disposal
..........................................................................................
60
Rectification of faults
......................................................................
60
Service and calibration
................................................................... 61
Technical data and measurement tolerances
................................. 62
38

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. Such cases void the guarantee.
l This unit is constructed and tested in accordance with DIN 57
411 part IA/DE 0411 part I, safety precautions for electronic
measuring devices or IEC 1010-I and left the factory in sound,
technically-safe condition. To maintain this condition and to en-
sure safe operation, it is essential for the user to observe the sa-
fety instructions and warning notes which are contained in these
operating instructions. The following symbols should be ob-
served:
:c.:
:g..
A
:.i&; .I.!.:
cr
=Attention!
.::.
Dangerous voltages! Danger to life!
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=Read the operating instructions
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CAT II
=Overvoltage categoryII
•l
=Safety class II .’
l Current measurements may only be carried out in circuits which I Y
are themselves fused at 16 A or in which no voltage greater than
250 VDCNACrmsor powers greater than 4000 VA can arise. The
measuring instrument must not be used in installations of Over-
voltage Category III in accordance with IEC 664. The measuring
instrument and instrument leads are not protected against arcing
(IEC 101 o-2-031, Section 13 I Of .I 01).
l Measuring instruments and accessories are not toys and do not
belong in the hands of children!
39

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. The
use of a repaired fuse or the bridging of the fuse holder is not
permitted. To change the fuses, disconnect the measuring in-
strument from the circuit being measured and switch it off. Re-
move all connected leads and test probes. Select a suitable
crosspoint screwdriver and carefully open the housing. Remove
the defective fuse(s) and replace with identical type(s) and nomi-
nal current ratings.
0.8 A, quick-blow, 250 V; usual description: F 0.8 A / 250 V or
F800mAI250Vand for the A range 15 A super fast-acting, 250 V;
usual description: FFI 5 A/ 250 V.
Having successfully changed the fuse(s), carefully close and
screw the case up once more, in reverse order.
Only put the measuring instrument into operation once again
when the case is securely closed and screwed up.
Take particular care when dealing with voltages greater than 25
VAC or greater than 35 VDC. Even at these voltages it is possible
to receive a lethal electric shock if electrical conductors are tou-
ched.
Therefore, first of all switch off the voltage source to be mea-
sured, connect the measuring instrument to the voltage source,
set the required measurement range on the unit and only then
switch on the voltage source.
After completing measurements, switch off the voltage source
and remove the test leads from the voltage source connecting
points.
40
-. :

9 Before any voltage measurement, ensure that the measuring
instrument is not set to the current measuring range.
l Before every change in measuring range, the test leads or adap-
ter must be removed from the object being measured.
l Before each measurement check your measuring instrument and
test leads for damage.
l For measurements, only use the test leads which are supplied
with the measuring instrument. Others should not be used.
l To avoid electric shock, care should be taken during measure-
ment not to touch the test probes and the connections (points of
measurement), not even indirectly.
l The voltage between a chosen 4 mm socket of the unit and
ground may not exceed 500 VDCNAC rms.
l The measuring instrument should not be used in areas or under
adverse environmental conditions in which inflammable gas, fu-
mes or dust are present or can occur. For your own safety it is
essential to avoid the measuring instrument or its wiring beco-
ming damp or wet. Avoid operation in the immediate vicinity of:
a) strong magnetic fields (loudspeakers, magnets)
b) electromagnetic fields (transformers, motors, coils, relays,
contactors, electromagnets,etc..)
c) electrostatic fields (charges/discharges)
d) transmission aerials or HF generators
l Do not use the multimeter shortly before, during, or shortly after
a thunderstorm (lightning strike! / high energy overvoltages! En-
sure without fail that the hands, shoes, clothing, floor and the
measuring instrument and its test leads, switches and compo-
nents, etc. are dry.
l If it can be assumed that safe operation is no longer possible,
then the unit must be switched off and protected against unin-
tentional operation. It can be assumed that safe operation is no
41