Conrad M-4660 M User manual

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OPERATING INSTRUCTIONS
Digital-Multimeter
M-4660M
Item-No.: 12 48 00
NOTICE D´EMPLOI
Multimètre numérique
M-4660M
No de commande: 12 48 00
BEDIENUNGSANLEITUNG
Digitalmultimeter
M-4660M
Best.-Nr.: 12 48 00
GEBRUIKSAANWIJZING
Digitale Multimeter
M-4660M
Best.-Nr.: 12 48 00
NL
D
F
GB
Imprint
These operating instructions are published by Conrad Electronic GmbH, Klaus-
Conrad-Str. 1, 92240 Hirschau/Germany
No reproduction (including translation) is permitted in whole or part e.g. photo-
copy, microfilming or storage in electronic data processing equipment, without
the express written consent of the publisher.
The operating instructions reflect the current technical specifications at time of
print.We reserve the right to change the technical or physical specifications.
©
Copyright 1998 by Conrad Electronic GmbH. Printed in Germany.
Note de l´éditeur
Cette notice est une publication de la société Conrad Electronic GmbH, Klaus-
Conrad-Str. 1, 92240 Hirschau/Allemagne.
Tous droits réservés, y compris traduction. Toute reproduction, quel que soit le
type,par exemple photocopies,microfilms ou saisie dans des traitements de texte
electronique est soumise à une autorisation préalable écrite de l`éditeur.
Impression, même partielle, interdite.
Cette notice est conforme à la règlementation en vigueur lors de l´impression.
Donnéestechniques etconditionnementsoumisàmodifications sansaucun préalable.
©
Copyright 1998 par Conrad Electronic GmbH. Imprimé en Allemagne.
Impressum
Diese Bedienungsanleitung ist eine Publikation der Conrad Electronic GmbH.
Alle Rechte einschließlich Übersetzung vorbehalten.Reproduktionen jederArt, z.B.
Fotokopie, Mikroverfilmung, oder die Erfassung in elektronischen Datenverarbei-
tungsanlagen, bedürfen der schriftlichen Genehmigung des Herausgebers.
Nachdruck, auch auszugsweise, verboten.
Diese Bedienungsanleitung entspricht dem technischen Stand bei Drucklegung.
Änderung inTechnik undAusstattung vorbehalten.
©
Copyright 1998 by Conrad Electronic GmbH. Printed in Germany.
Impressum
Deze gebruiksaanwijzing is een publikatie van Conrad Electronic Ned BV.
Alle rechten, inclusief de vertaling, voorbehouden. Reprodukties van welke aard
dan ook, fotokopie, microfilm of opgeslagen in een geautomatiseerd gegevens-
bestand, alleen met schriftelijke toestemming van de uitgever.
Nadruk, ook in uittreksel, verboden.
Deze gebruiksaanwijzing voldoet aan de technische eisen bij het ter perse gaan.
Wijzigingen in techniek en uitrusting voorbehouden.
©
Copyright 1998 by Conrad Electronic Ned BV. Printed in Germany. *02-987/M
NL
D
F
GB
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Page 2 - 34
Page 35 - 70
Seite 71 - 105
Pagina106 - 139

3
Contents page
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2. Safety rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3. Description of the control elements . . . . . . . . . . . . . . . . . . . . . . . .7
4. Use of the multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5. Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
6. Maintenance and calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
7. Technical data and accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
1. Introduction
This 4 1/2-digit Multimeter with multi-display is equipped with several
special features which are useful fo some measurements:
With the key FUNC several special functions can be selected which are
supported by the buttons SET/R, UP and DOWN. These special functions
are shown in the top line of the display. The function D-H (= Data Hold)
for example, variable measuring values are "frozen" to use them after-
wards for further evaluation, e. g. measuring reports. The frozen value
can be read in the middle sub display.
With the next special function (A-H = Auto-Hold) the meter will auto-
matically record the minimum (= MIN), the maximum (= Max) and the
average (= AVG) display reading.
The next special funtion is the relative mode "RE"L, it enables the ope-
rator to compare a manually preset reference value with the subsequent
measurement. The three subdisplays show from the left to the rigth the
deviation in %, the difference to the reference value and the preset refe-
rence value.
With the function "MEMORY" up to 10 display contents can be stored
and be recalled with the function RCL later from the memory.
The special function "CMP" (= Comparison) enables you to compare a
reference value (High/Low) with the subsequent readings.
The function "LOGIC" included on the rotary function switch allows
measurement of various logic levels. In addition to the display Lo, - - - -
(=pass) and Hi, the level frequency and voltage level are shown in the
2
Digital Multimeter M-4660M,
Order-No. 12 48 00
Attention! Read before operation!
Read these operating instructions carefully and completely. In the case
of damage caused by ignoring the instruction, the claims under gua-
rantee lapse. No legal liability can be accepted for any damage from the
multimeter being used for the wrong purpose or operated improperly.
Thus cannot take any liability for consequential damage.
The proper operation of the measuring unit includes:
• measurement of DC voltage to 1000 VDC max in five steps
• measurement of AC voltge to 750 VAC max in five steps
• measurement of DC and AC currents to 20 A max., for max. 30 s (un-
fused), in 3 steps each
• measurement of resistance to 20 MΩ, in 6 steps
• measurement of capacity to max. 200 µF in 2 steps: Hi and Lo
• measurement of inductance (coils) up to 200 mH max.
• measurement of frequencies up to 20 MHz max.
• measurement of power up to 3680 W max. via the optionally available
item power adapter
• continuity check, diode and transistor test, logical test
• measurements under adverse environmental conditions is not permis-
sible. Adverse environmental conditions are:
- dampness or excessive atmospheric humidity,
- dust and combustible gases, vapors or solvents,
- storms, or stormy conditions, such as strong electrostatic fields, etc.
Other applications than those described above will damage the measu-
ring device, and are also liable to cause hazards, such as short-circuits,
fire, electrocution, etc. Nothing in the device should be changed or
modified! It is mandatory to observe the safety rules!
GB

5
wed to use the unit for installations in the overload range III according
to IEC 664. The unit and the measuring cables are not protected
against arcing (IEC 1010-2-031, section 13.101).
• Keep children away from measuring units!
• Observe the accident prevention measures in the workplace prescibed
by the Associations of Employer’s Liability Insurance for electrical plant
and operating material.
• When using the unit in schools, training centers and hobby-workshops
the use of the measuring equipment must be responsibly supervised by
teachers or trained personnel.
• If covers are opened or parts are removed, except it is possible without
tools, voltage-carrying components may be accessable. Terminals can
also carry voltage. If it is necessary to open the unit before adjustment,
maintenance, repair or exchange of parts or modules, the measuring
unit has to be disconnected from all voltage sources and measuring cir-
cuits. If adjustment, repair or maintenance to the measuring unit must
proceed to the unit open, it must only be carried out by qualified ser-
vice personnel or qualified electricians/engineers, familiar with the
dangers and the relevant rules (VDE 0100, VDE-0701, VDE-0683).
• Capacitors in the unit may still carry voltage, even if the unit has been
separated from all power voltage sources and measuring circuits.
• Please ensure to use new fuses of the proper current rating and the
specified type. Do not use repaired fuses and do not bridge the fuse
holders. When replacing the fuse separate the measuring unit from the
measuring circuit, remove any input signal and switch it off. Remove all
connected cables and probe tips ! Use a suitable crosspoint screw dri-
ver and carefully open the case. Remove faulty fuse(s) and replace
them with fuse(s) of the same type and nominal current rating 0.8 A
fast-blow, 250 V; standard designation: F 0.8 A / 250 V or F800mA/250V,
or for the ampere range, 15A quick-acting, 250 V; standard des-
ignation: F15 A/250 V or BUSS ABC15.
After the fuse has been exchanged close the cabinet. Do not operate
the unit before it has been closed and screwed safely.
4
sub-displays. The function "hfe" allows testing of low-rated transistors.
The function CAP Hi and CAP Lo are used to check the capacitance of
capacitors. You can use the function "FREQ" to measure the frequencies
of measurement signals (not mains voltage) up to 20 MHz. The function
"mH" (= milli Henry) allows the measurement of dead coils (inductance)
up to 200 mH max. at the CAP measurement socket. Via an optionally
available power adapter, the DMM can be converted into an actual
power meter with simultaneous display of the actual power consump-
tion of the consumer, current consumption of the consumer, AC voltage
and power factor (Cos Phi).
It is also possible to connect the DMM with a respective cable (option)
which is connected to the built-in interface to a personal computer. After
installation of the respective software on the PC a communication bet-
ween the multimeter and the PC is possible.
The 4 1/2-digit LCD allows value definition up to 4 digits after the deci-
mal point. An Auto-Power-Cut-Off-Function prevents unnecessary drain
on the battery, i.e. when not in use (or display unchanged). After approx.
15 minutes the Multimeter switches to stand by mode.
The M-4660M can be used universally both in the hobby and industriel
(restricted) sectors, or in schools, etc.
2. Safety Rules
• CE coding: the digital Multimeter M-4660M is EMV-tested and meets
Guideline 89/336/EWG. The device is also GS-tested and meets the low-
voltage Guideline 73/23/EWG.
• This unit is constructed and checked according to DIN 57 411 Part 1/
VDE 0411 Part 1, Safety Requirement for Electronic Measuring Units
and IEC 1010-1. This unit left the factory in a technically safe and per-
fect condition. To maintain this condition and to guarantee safe ope-
ration, the user must observe the safety rules and warnings (Attention)
contained in these operating instructions, by all means.
• This multimeter must only be used in fuse lines which are protected
with 16 A. The voltage existing/appearing must not exceed 250 VDC/
VACrms and the maximum load must not exceed 4000 VA. It is not allo-

7
• If there are doubts whether a risk-free use is still possible the unit has
to be put out of operation and be secured against unintentional use.
It must be assumed that a risk-free operation is no longer possible if
- the unit shows visible damage
- the unit does not work and
- longterm storage under adverse conditions or
- stress during transport took place
• Don't switch on the measuring unit immediately after transferring it
from a cold to warm room. Condensed water might impair or destroy
your unit. Give the unit time to warm up to room temperature before
you switch it on.
3. Description of the Control Elements
Picture 1 (page 140)
1. Power ON/OFF (see also 4.3.2)
With this push-button the measuring unit is turned on and off. A
short time after turning the unit on it is ready for operation.
2. Push button "FUNC" for special function (see 4.3.2 and 4.3.4)
3. Push button "SET/R"
To set/reset the special functions.
4. Push button "UP" additional button to set the special functions (see
4.3.2 and 4.3.4)
5. Push button "DOWN" additional button to set the special functions
(see 4.3.2 and 4.3.4)
6. Terminal block for measuring capacitance (capacitors) and inductance
(coils = L)
7. Transistor Socket
This socket is for testing the hfe-parameter of low power transistors.
6
• Take special care when working with voltage above 25 V (AC) and
above 35 V (DC). Even such voltage might cause a life-dangerous elec-
trical shock when electrical conductors are touched.
First switch off voltage source, connect the measuring unit with the
terminals of the voltage source to be measured, set the measuring unit
to the necessary voltage range and afterwards switch on voltage source.
After measurement has been finished, switch off the voltage source
and remove the measuring cables from the terminals of the voltage
source.
• Make sure before each voltage measurement the unit is not set to the
amperage range.
• Before changing the measuring range remove the probe tips from the
object to be measured.
• Control before each measurement the measuring unit and your test
leads to make sure they are not damaged.
• To avoid an electrical shock, don't touch directly or indirectly the test
probes and the test points during measurement.
• Do not use this measuring unit in environments or rooms with adverse
environmental conditions where combustible gases, vapors or dusts
exist or may exist. For your own safety avoid under all circumstances
that the measuring unit or the test leads become damp or wet.
Avoid the usage near
a) strong magnetic fields (loudspeakers, magnets)
b)electromagnetic fields (transformers, motors, coils, relays, contactors,
electromagnets etc. )
c) electrostatic fields (charge/discharge).
d)transmission antennas or hf-generators
• Do not use the Multimeter shortly before, during, or shortly following
a storm (lightning!/high-energy overvoltages!). Make absolutely sure
that your hands, shoes, clothes, floor, measuring device/connecting
cables, switches and switch components, etc. are dry.

9
19. REL = Relative = Reference Value
20. MEM = Memory = to memorize the value
21. RCL = Recall = to get back the memorized reading on the display.
22. CMP = Comparison = Compare a Reading
23. Reference No. (0 to 9)
24. / = Diode Test and acoustic continuity check
25. AC = Symbol for AC current or voltage
26. " − "= Minus Sign or Symbol for Negative Polarity
27. FREQ = Frequency
this symbol is displayed in the frequency count mode
28. CAP = Capacitance
CAP is for Capacitance => Measurement of capacitors
29. hFE This symbol indicates the transistor test.
30.1., 2. and 3. Sub-Display
These three small sub-displays with 4 1/2digits are activated during
the different function modes.
31. = Low Battery
When this symbol is displayed, it is time to change the battery
32. Different Units of the Display Values
33. = Inductance measurement (coils)
34. = cos phi sign (for power factor)
+
-
8
8. Rotary function switch (=measurement function switch) for setting
the various modes of operation (voltage measurement, current mea-
surement, etc.) and measurement ranges.
9. 20-A Input Socket
This input socket is fused with 20 A and is designed for measuring DC
and AC current to max. 20 A (max. 30 s with 15 min. interruption bet-
ween the measurements).
10. mA-input
This socket is for measuring DC and AC current to 200 mA max. (fused
with 800 mA quick blow)
11. COM (−) -Input Socket (COM or Minus Terminal)
12. V/Ω-(+)-Input Socket (Plus Terminal)
13. Multifunction Liquid Crystal Display
(LCD) (4 1/2digit, max. display value 19999) with three 4 1/2subdis-
plays.
14. Analogous Bargraph
15. Bargraph-Segments
16. Overload "OL"-Indication
"OL" is displayed and an acoustic signal is emitted when the range is
exceeded = overflow (no acoustic signal during resistance measure-
ment, or diode test).
Attention!
Observe the max. input limits.
17. Data Hold D-H
Data Hold means the meter will "freeze" a display reading.
18. A-H "Auto-Hold" = Min, Max and AVG holding with simultaneous
display

11
4.2 Connection of Connecting Cables
When measuring, always use only the connecting cables, or adapter/
cables supplied, which are an optional item of DMM and thus specially
adapted to it. Before any connection, make sure that the connectors, or
measurement clips, are in good condition, and that the insulation is free
of damage.
The connecting cables supplied are approved for voltages up to 1000 V
max. Your measuring device, M-4660M has been designed for voltages
up to 1000 VDC/750 VACrms max. Please take special care with voltages
higher than 25 V AC/35 V DC.
Attention!
To avoid the risk of electrical shock, instrument damage and/or equip-
ment damage, input limits must not be exceeded.
4.3 Operation
4.3.1 Basic Settings
Hint
The numbers which are put in brackets in the following text refer to
"Description of the control elements", point 3.
Press the button "ON" (1). Turn the rotary function switch to the desired
position. Now the meter is ready for "normal" operation without addi-
tional function. Even without additional functions "small" displays (sub-
displays) support measurement.
To select such additional function press the key FUNC (2). Press it again
to scroll through the different sub-functions.
To exit the menu press SET/Rest-key twice: to operate the SET/Rest-key
press once to enter, press button twice to exit/reset (depending on the
preset sub-function)
10
4. Use of the Multimeter
4.1 Inserting the Battery - Battery Exchange
To guarantee precise measurement, insert a standard 9 V battery. If the
battery symbol appears in the display, it is time to change the battery.
Proceed as follows:
• disconnect your measuring unit from the measuring circuit
• disconnect the test-leads from the measuring unit and turn off the
power.
• remove with a crosspoint screw driver the fastening screw to open the
battery compartment.
• now lift the cover carefully.
• separate the old battery from the battery snap and fasten a new one
of the same type.
• after the battery has been changed reinsert the battery into the batte-
ry case and close it carefully
• secure it with the screw.
• be careful that the battery leads (red/black) are not pinched between
the housing and the cover.
Attention!
Never use the measuring unit before the cover has been closed comple-
tely, to avoid an electrical shock!
Never leave empty batteries in the measuring unit, as even corrosion-
free batteries might leak and chemicals could be released, which are
detrimental to your health and disturb the battery compartment.
Please remember batteries - due to their heavy metal content - are no
ordinary refuse. They must be disposed of in special containers (collec-
ting points) or in a safe manner that complies with all applicable laws.

13
4.3.3 Terminal and Switch Imprint
a) Transistor Socket hfe
The eight pole transistor terminal is lettered symmetrically with (E)
Emitter,(B) Base, (C) Collector. Insert the transistor pins into the tran-
sistor socket as in the drawing according to transistor type, remove
voltage before measurement.
b) Terminal block for capacitance (poled "+" and "-") and inductance
measurements "mH"
Connect the discharged (!) capacitor to the sockets, checking that
poles are connected correctly.
Make sure that the connecting cables are long enough, since measu-
rement errors may otherwise occur.
For measuring inductance, insert the dead coil in the coded sockets.
Important!
The upper terminals are marked "+", and the lower terminals "-". Make
sure, especially when measuring unipolar capacitors ("Elkos") that the
polarity is correct. Please refer to the diagram shown below:
c) Rotary Function Switch = Measuring Function Switch (8)
Attention!
Never turn the measuring function switch during measurement, as there
is the risk of instrument damage and danger to life if there are voltages
exceeding 25 VAC or 35 VDC.
inductance
measurement
+
-
-
+capacitance
measurement
12
4.3.2 Terminal and Switch Imprint
a) Press the ON/OFF-key (1) to turn the unit on and off: Press the key
once to turn the power on, press it again to turn the DMM off.
AUTO-POWER-CUT-OFF extends the life of the battery by turning off
the meter: if neither the rotary function switch nor a button is ope-
rated for 12 minutes the DMM is automatically turned off. During
"communication" of the multimeter with a PC, i.e exchange of data,
AUTO-POWER-OFF is disabled.
b) FUNC
Press this button to select the function modes. The following symbols
appear in the display when you scroll in the function modes:
D-H -> A-H -> REL -> MEM -> RCL -> CMP
c) SET/R (= Set / Reset)
Press this button once to activate or to enter the selected function
mode. Press this key only once.
- Press the function mode the button D-H again to return to basic set-
ting (press until the beeper sounds).
- In the function mode A-H (MIN-MAX and AVG) the A-H symbol is dis-
played. After the first push of the SET/R key the A-H symbol is set and
will stop blinking. If the SET/R-key is pressed again, the R-H symbol is
fixed. You can commence measurement. Another push of the SET/R
key discards the function and the previous normal mode is restored.
- In the function modes REL, MEM, RCL and CMP push SET/R button
several times to return to normal mode. Another possibility to exit
from these modes is either to press the button FUNC or ON/OFF once
or to move the rotary function switch to an adjacent position (observe
all safety rules!).
d) UP/DOWN
Press UP or Down button to determine the reference value in the fun-
ction modes REL or CMP or to address the stored value (reference
numbers) in the subfunctions MEM or RCL (recall memory).

15
f) COM = common socket
In this case, the black connecting cable must be inserted for all mea-
su rements, except capacitance or inductance measurements (common-
socket signifies minus or "−" or ground socket).
g) V/Ω-Socket
For measurement of voltage, frequency, resistance, continuity, diodes
and logic tests plug in the red test-lead in this terminal.
h) For power measurement, the measurement adapter (optionally avai-
lable) must be fitted to all sockets.
4.3.4 Display Explanation and Symbols
a) Digital Display
Digital readings are displayed the main- and the sub-displays (small
displays) on a 19999-count basis with automatic polarity indication (-),
(for negative voltage or reversed polarity). There are four decimal
point positions.
b) Analogous Bargraph
The bargraph consists of 43 segments and is faster than the digital
display. It functions like the needle of an analogous measuring instru-
ment, but without its mechanical disadvantages. Is is especially for
quick changing measuring signal, for which the digital display is too
"slow". So you can quickly see tendencies in the measuring values.
If the measuring range is exceeded "OL" for Overload is displayed the
bargraph is flashing and a warning sound sound is emitted (no acou-
stic signal during measurement of resistance, and diode).
c) Data-Hold "D-H"
In this mode you can freeze a reading in the second ("small") display
by pressing the SET/R button. To exit this subfunction hold down
SET/R button or FUNC for a few seconds or turn the function selector
switch (observe the safety rules). Afterwards you return to the basic
setting.
d) Auto Hold A-H
In this function the meter will automatically record the minimum and
the maximum display reading, MIN and MAX values. These values are
currently updated = refreshed. The MIN-value is shown on the left
14
The different basic measuring ranges are selectable by turning the
switch:
DCV = DC voltage (blue, 5 ranges)
ACV = AC voltage = alternating voltage (blue, 5 ranges)
ACA = AC ampere (red, 3 ranges)
DCA = DC ampere = direct current measurement
(red, 3 ranges)
hFE = Transistor test (yellow, 1 range)
LOGIC = Logic measurement (yellow, 1 range)
CAP = Capacitance measurement (yellow, 2 ranges
Hi and Lo, and/or 2 internal with automatic
switching)
FREQ = Frequency measurement (yellow, 1 range and/or
4 internal with automatic switching)
mH = Inductance measurement (yellow, 1 range)
POWER = True power measurement (red 1 range or 2
internal with automatic switching)
/ = Diode test/acoustic continuity test (grey, 1 range)
Ohm = Resistance measurement (grey, 6 ranges)
d) 20-A-Input Socket
For DC- and AC-current measurements to max. ! 20 A. Insert the Red
test-lead into the input socket.
Attention!
During current measurement the measuring function switch must never
be set to voltage measurement (mV or V).
e) mA-Measuring Socket
For measurements to 200 mA max.!, connect the red test-lead, pay
attention that the measuring function switch is set to position
"2 mA" or "200 mA".

17
Make again your measurement and push the key SET/R once. This selec-
ted memory now is addressed. If a memory number which has been
used before is selcted, the previous value is updated and stored with
the new measurement value.To exit this function mode turn the func-
tion switch (observe the safety rules!) or press the buttons FUNC or
SET/R.
Hint
If you exit the function mode because you pushed the SET/R button too
often, this function mode is left, but the memory is not erased and can
be "recalled" with the following function mode.
g) RCL (= Recall)
This function enables you to get the memorized reading back on the
LCD. Follow these steps:
- Push FUNC key until RCL flashes. Push SET/R once. RCL is fixed but the
reference number flashes. Press UP or DOWN buttons to address the
desired number where the measurement has been memorized. Press
SET/R button to get the memorized value back on the display. Then
the chosen value will appear on the left sub-display. The following
memory locations are displayed in the other smaller displays. To exit
this function mode turn the function switch (observe the safety rules!)
or press the buttons FUNC or SET/R, afterwards return to basic set-
tings.
h) CMP (= Comparison)
This function mode enables you to make the High/Low comparison of
subsequent readings, by comparing a reading with both the stored
high reference value and the stored low reference value.
On the sub-display "Lo" appears for reading less than the low refe-
rence value, "Hi" is displayed for reading more than the highest refe-
rence value and "Pass" for a middle value between the low and the
high reference value.At the same time an interval signal is emitted.
To activate this function mode, push "FUNC" until the symbol "CMP
appears on the top of the display and "LOW" flashes over the left
sub-display. Now push again SET/R button and then "UP" and
"DOWN" to set the minimum reference value with polarity. Press
after each change SET/R button again, to enter the setting and to go
16
sub-display, the MAX-value on the right sub-display. On the middle
sub-display the average value = AVG is shown. This value is currently
"refreshed".
To exit this function mode press SET/R again or press FUNC or turn the
rotary function switch (observe the safety rules!), afterwards return
to normal settings.
e) REL (= Relative)
The relative mode enables the operator to compare the reference
value with a subsequent reading. Proceed as follows:
- Set the function mode at REL mode and press once the button SET/R
- Store the polarity by pressing the UP and DOWN keys, afterward press
SET/R button.
- Press UP and DOWN buttons again to set the desired reference value.
Press SET/R by turns to move to the next digit.
- For final setting of the reference value press SET/R button once again.
- The meter will now display the difference between the stored refe-
rence value and the subsequent readings on the sub-displays, while
the present (true) measurement is on the main-display. The left sub-
display will show the difference in %, the middle sub-display will
show the offset and the right sub-display the preset reference.
To exit this function mode press SET/R again or press FUNC or turn the
rotary function switch (observe the safety rules!), afterwards return
to normal settings.
f) MEM (= Memory)
Up to 10 measurements (reference number 0 to 9) can be stored and
recalled. Proceed as follows:
1. Push function button until MEM flashes in the display, afterwards press
the key SET/R once. MEM is fixed and the reference number flashes.
Make your measurements and push the SET/R key once to store the
present measurement value in the first free memory location = refe-
rence no. 0.
2. Press UP/DOWN button to go to the next free memory location (refe-
rence no. between 0 and 9).

19
g) rDY = ready = Logictest
This function enables you to check and to display all usual logic levels.
h) Low Battery
A 9-Volt alkaline battery in this meter has an avery life of approx. 100
to 150 hours. Low battery indication approx. 8 hours before battery is
"dead". Battery check between the measurements.
i) The following symbols indicate the unit of the value displays:
AC = AC current or voltage
DC = DC current or voltage
mV = Millivolt (exp.-3)
V = Volts
mA = Milliampere (exp.-3)
A = Ampere
Hz = Hertz
kHz = kilohertz (exp.3)
MHz = Megahertz (exp.6)
µF = Microfarad (exp.-6)
nF = Nanofarad (exp.-9)
pF = Pikofarad (exp.-12)
KΩ= Kiloohm (exp.3)
MΩ= Megaohm (exp.6)
mH = milli-Henry (exp. -3)
dB = Decibels
5. Measurement
5.1 Voltage Measurement
Attention!
Never exceed the maximum input limits. of max. 1000 VDC or 750 VACrms.
Do not touch circuits or parts of circuits, if you measure voltage more
than 25 VACrms or 35 VDC.
If you measure voltage the aperage terminals must not be connected.
18
to the next digit. As soon as the minimum reference (MIN) value has
been fixed, "HIGH" flashes over the right sub-display. Set this high
reference value respectively (with polarity and four digit value). After
the reference values have been defined press SET/R key again. Now
"R-H" for Range Hold flashes in the top line of the display. Set with
the UP and DOWN buttons the measuring range (e.g. voltage control
in a circuit under worst-case conditions). After the measuring range
has been entered (as far as a manual selection is possible) Comparison
= CMP is activated.
To exit CMP mode turn the rotary function switch (observe the safety
rules!) to an adjacent range or press "FUNC". Reset with the SET/R
button is also possible, even during measurement.
4.3.5 Display Annunciators and Symbols for the Modes
a) Diode Test and Continuity Check
The value displayed is the forward voltage at approx. 1 mA test current.
Range of 0 - 2.0 V.
The contnuity test enables you to check continuity of wiring, connec-
tions or fuses. Either acoustic or visual test (display of measurement)
is possible. An acoustic signal is emitted at resistors below 30 Ω.
b) Negative Polarity
Shows if test-leads are confused or indicates (with a " − ") negative
input before the measurement.
c) FREQ Frequency Measurement
You can measure frequency up to 20 MHz.
d) CAP Capacitance Measurement
The capacitance ranges lets you measure discharged capacitors of 10 nF
to 200 µF.
e) mH inductance measurement
The inductance measuring range permits measurement of dead coils
(windings, filter coils, etc.) of approx. 0.05 to 200 mH
f) hFE Transistor Test
Enables you to measure the hFE value.

21
Fig.2 AC voltage/DC voltage, (page 141)
5.2 Current Measurement
Follow these steps to measure DC or AC current:
1. Connect the black test-lead with the COM-socket (11) and the red
test-lead with the mA-socket (10), if you want to measure current to
200 mA max. and with the 20-A-Socket (9), if you want to measure
current over 200 mA to 20 A max.
2. Set the rotary function switch to current measurement (2m or 200 m
or 20 DCA/ 2m or 200 m or 20 ACA).
3. Connect the test-leads in series with the circuit or load. (See following
drawing).
Attention!
Never measure currents in circuits in which voltages over 250 VDC/
VACrms could exist, this is life dangerous! Never measure currents
exceeding 20 A.
Only measure in circuits which are fused with 16 A or in which powers
exceeding 4000 VA could not exist. Current measurements of 20 A may
not last longer than 30 seconds and may only be executed in intervals
of 15 minutes.
During AC current measurement the middle sub-display will show the
frequency of the AC voltage (in the range of 40 Hz to 400 Hz) and the
main display shows the present measurement.
During DC current measurement the three sub-displays below the main-
display are active. In the left sub-display the present reading is taken
1 second later, the middle display the reading is taken 2 seconds later
and in the right display the reading appears 3 seconds later.
~
A
current source
multimeter
object
20
To measure DC or AC voltage proceed as follows:
1. Connect the red test-lead with the V/Ωsocket (12) and the black test-
lead with the COM-socket (11).
2. Set the rotary function switch to the desired position (range). You
have 5 ranges for dc voltage ( DCV) or AC voltage (ACV) measurement
each. During AC voltage measurement the right sub-display will show
the dB-value of the AC voltage, the middle sub-display the frequency
and the main display the present measuring value.
3. Connect the test-lead tips with the object to be measured (load, cir-
cuit etc).
4. The respective polarity of the value is displayed together with the cur-
rent measuring value in the main display.
Each of the five voltage ranges presents an input impedance of 10 mΩ
(in parellel with < 20 pF). AC-voltage input is AC-coupled.
As soon as " −" is set before the value during DC voltage measurement,
the voltage is negative (or the test leads are confused).
Hint
Due to the sensitive nature of the input terminal your meter might dis-
play any small values (not connected with the object). This residual
value will not affect the actual measurements. It will vanish as soon as
you start measurement. But Auto-Power-Off is not active when the
"phantom-measurements" are displayed.
During DC voltage measurement the three sub-displays below the main
display are active. In the left sub-display the measuring value appears
1 second later, in the middle sub-display the measuring value appears
2 seconds later and in the right sub-display the measuring value appears
3 seconds later.
~V
voltage source object

23
or similar, etc. This might seriously influence the measuring result.
If resistance over 1 MΩis measured, the display might need a few
seconds to stabilize.
During resistance measurement the three sub-displays below the main-
display are active. In the left sub-display the present reading is taken
1 second later, the middle display the reading is taken 2 seconds later
and in the right display the reading appears 3 seconds later.
5.5 Capacitance Measurement
Follow these steps to measure capacitance:
Set the rotary function switchto CAP (Lo) or CAP (Hi) and insert the
discharged capacitor into the appropriate socket observe the correct
polarity ("+" and "-"). If the are relatively low capacities as 100 pF or
smaller it better to use the special function "REL" (described under 4.3.4 e)
to set the display to "0000". In the other ranges (200 n or 200 µ) wait a
few seconds until the off-set sets the display to "0000".
Attention!
When shorting capacitors (discharge), high-energy discharge may take
place. Caution life danger! Do not touch the terminals if there are capa-
citors with voltages over 35 VDC or 25 VAC. Use special caution in envi-
ronments or rooms with adverse environmental conditions where
flammable gases, vapour or dusts exist or may exist ==> explosion
hazard!
During capacitance measurement the three sub-displays below the
main-display are active. In the left sub-display the present reading is
taken 1 second later, the middle display the reading is taken 2 seconds
later and in the right display the reading appears 3 seconds later.
+
-
capacitance measurement
22
5.3 Continuity Test
With this function you can test dead leads, fuses, circuits.
Proceed as follows :
1. Connect the black test-lead with the COM-socket (11) and the red
test-lead with the V/Ωsocket (12).
2. Set the rotary function switch to /(= diode test or conti-
nuity test). Afterwards connect the test-lead tips to the object to be
measured (all voltage must be removed).
3. If the line resistance is less than 40 Ωa test buzzer sound is emitted.
Attention!
Never measure capacitors which carry voltage, as a possible discharge
could destroy your measuring unit.
5.4 Resistance Measurement
Attention!
Make sure all objects, circuits and components under test are without
voltage! During continuity check the voltage measuring socket and the
current sockets must not be connected.
Proceed as follows:
1. Connect the black test-lead with the COM-socket (11) and the red
test-lead with the V/Ωsocket (12).
2. Set the rotary function switch to resistance measurement Ohm.
Connect both test-lead tips to check the continuity of the test-leads.
3. Now connect the test-lead to the device you want to measure.
Fig. 4 Resistance Measurement, (page 142)
Hint
During resistance test, make sure that the contact between probes and
circuit is good. Make sure the test points are free of dirt, oil or solder flux

25
Attention!
Observe the max. input limits. Never connect voltages over 50 VDC/
VACrms (rms = eff). It is life dangerous to touch the terminals or probe
tips when measuring voltages over 25 VAC or 35 VDC.
Disconnect the test-leads from the contact points before changing the
meter function and range. The sensitive electronic of the measuring unit
might be destroyed and you expose yourself to severe shock hazard.
If there are voltages below 50 mVrms (at 1 Khz) no frequency measure-
ment is possible.
During frequency measurement, the level of AC voltage is shown on the
small central display in V. In the right-hand small display, the dB value
for the AC voltage is shown.
Fig.5 Frequency measurement, (Page 142)
5.8 Transistor Test
Attention!
The transistor jack is not protected against overload.
To measure the hFe-parameter (of amplification) of a transistor follow
these steps:
1. Set the rotary function switch to hFE position.
2. Insert the transistor you want to measure into the appropriate transi-
stor socket.
Pay attention to the following points:
Hints
• observe the sequence of connection of the transistor (e.g. C-B-E) (you
will find it in the transistor comparative table).
24
5.6 Diode Test
To test diodes proceed as follows:
1. Connect the lack test lead with the COM-socket (11) and the red test-
lead with the V/Ω-socket (12).
2. Setthe measuringfunctionswitch to" /". Nowconnect the test-
lead tips with the object under measurement to an off-circuit semi-
conductor line, the RED probe-tip to the anode, the BLACK test-lead
tip to the cathode (as a rule it is marked with a coloured ring, point
etc.)
If you check a diode's forward voltage, you will measure voltage of
approx. 0.25 V (Germanium) or 0.7 V (Silicium) to 2.5 (or 250 mV, 700 mV
to 2500 mV), if the diode is not defective. The middle sub-display will
show 9ood for "good".
If you reverse the probe-tips, this means red to the cathode and black
to the anode, you check the so called reverse direction.
If "OL" is displayed and "Open" in the middle sub-display, the diode
is good. However, if any voltage is displayed, you connected the
object wrong or the diode is defective.
Attention!
During diode test, observe that the diode or the circuit in which it is
built in, must be without voltage. All existing capacities must be
discharged.
Fig. 3 Diode test, (page 141)
5.7 Frequency Measurement
Follow these steps to measure frequency:
1. Connect the black test-lead with the COM-socket (11) and the red
test-lead with the V/Ωsocket (12).
2. Set the rotary function switch (7) to "FREQ" and connect the test-lead
tips with the frequency source (generator, etc.).

27
• if the level at the test-point is between 30 % and 70 % of Vcc, "----" is
displayed.
To check the logic level and to set the level rans proceed as follows:
1. Switch on your measuring unit.
2. Set the rotary switch to "LOGIC". This function displays "rdY"
(= ready for measurement).
3. Connect the test-leads with the COM-input socket (black lead) and
the V-Ωsocket (red lead).
4. Now connect the other end of the black test-lead to the "ground"
point of the digital circuit = " − " (normally).
5. While keeping the black test-lead connected to the ground touch
with the red test-probe to the supplying voltage point Vcc (or V++ or
V+ or Vc etc.) If the supply voltage is below 20 VDC and you confirm
once the button "SET/R", a buzzer sound is emitted and "Hi" is dis-
played.
Attention!
If this supply voltage is more than 20 VDC, a buzzer sound is emitted,
too and "OL" for Overload is displayed.
6. Now the multimeter is "ready" to check the logic level test points of the
circuit in question. Separate the red test-probe from the supplying
voltage point. Now move the red test-pobes to the points in question.
Hint
During logic-level measurement, the right sub-display will show the pre-
sent DC current value and the middle sub-display displays the frequency.
26
• Sometypes of transistors contain internal base-to-emitter resistance
which could cause undependable measuring results.
• The hFE-measuring value is no absolute measurement. It only indicates
if the transistor is operating or not. The true amplification of a transi-
stor depends on its operating current. This multimeter supplies a base
current up to 10 uA at a Uce of 2.8, the collector current is measured
to calculate the respective hFE-value.
• It is not possible to measure transistors which are connected in a circuit.
• It is not possible to measure the hFE-value of FETs or other unipolar
transistors.
• If a transistor (e.g. BD 242 etc.) has too large terminals for the test
socket, do not force it into the test socket, as it could be damaged.
• The hFE-measurement is affected by temperature differences As soon
as you touch the transistor when you plug it in the socket and warm it
with you fingers the measuring result could be influenced. If the hFE
reading is not stable, take the transistor out and let it come to room
temperature.
During hfe-paramenter measurement of small power transistors the
three sub-displays below the main-display are active. In the left sub-dis-
play the present reading is taken 1 second later, the middle display the
reading is taken 2 seconds later and in the right display the reading
appears 3 seconds later.
5.9 Logic Test
This measuring function lets you easily check logic levels in digital circuits
(5 V or 12 V or 18 V logic etc.).
The multimeter will display one of the three modes:
• if the high level at the test point exceeds 70 % of Vcc (or V++ or Vc or
V+ etc.) "Hi" is displayed (to max. 18 VDC, above "OL" for "Overload"
is displayed).
• if the test point shows a low-level falls below 30 % of Vcc, "Lo" is dis-
played.

29
full contact and that the polarity of the multiconnector at the
Multimeter is correct. The multiconnector includes: left, the current path
"20 A", half-right the ground connection "COM" and on the far right,
the current path "V/Ω". The multiconnector must be connected to the
Multimeter in accordance with the marking.
"20A" in the 20A socket, "COM" in the COM socket and "V/Ω" in the V/Ω
socket.
Important!
Incorrect or faulty connection of the Multimeter may cause irreparable
damage to the Multimeter, adapter or consumer. Potentially lethal
hazard!
To measure the actual power, Cos Phi, kWh price setting and measuring
the kWh proceed as follows:
1. Connect the measurement adapter, as described above, to the mea-
suring device.
2. Set the rotary function switch to the setting "POWER", and then
switch the measuring device and consumer on.
3. The following displays are active in this basic setting: bottom left the
reference number "0" is displayed. Beneath this, the small display on
the left measures current in "A", while that on the right measures AC
voltage (mains voltage), and the display on the far right the cos Phi
(power factor). Cos Phi is the phase angle between current and vol-
tage and is in the case of rein ohmic consumers always "1". With
inductive consumers, cos Phi is between 0.3 and 0.98.
In the "main" display you can read off the actual power consumption
of your consumer.
4. In the second measurement program, press the button "UP" once,
and with the reference number "1", the cost per hour is shown in the
small display on the left (the setting is made in the next program
=Ref.-no. 2), while in the small display in the middle the number of
kWh is measured/shown, and the small display on the right shows the
total cost.
28
5.10 Inductance measurement
For measuring dead coils, proceed as follows:
Set the rotary selection switch to "mH" and connect the connecting
cables of the dead coil you are measuring into the measurement termi-
nal block. With very low inductance, such as 100 µH or lower, it is appro-
priate to use the special function "REL" (described under 4.3.4 e), to set
the display to "0000".
Important!
Do not connect voltages. These could irreparably damage the device.
When measuring inductance, the three small displays beneath the main
display are also active. The small display on the left shows the current
measurement value with 1 second delay. The middle display shows the
measurement value with 2 seconds delay, and the small display on the
right shows the measurement value with 3 seconds delay.
5.11 Usage of the Analogous Bargraph
The bargraph is easy to use and to understand. Is is comparable with the
needle of an analogous measuring instrument, but without its mechani-
cal disadvantages. Is is especially for quick changing measuring signals,
for which the digital display is too "slow". So you can quickly recognize
see tendencies in the measuring values. The measuring rate is 3-4 mea-
surements/s.
5.12 CMPower measurement
For measuring the power consumption of a consumer, e.g. TV or stereo
system in "standby", or irons or bulbs, etc., you require the power adap-
ter, which consists of a connector/socket unit on one side and the multi-
connector for connecting the Multimeter on the other side. Always first
connect the multiconnector to the Multimeter.
Next, connect the deactivated load/the deactivated consumer to the
safety socket of the adapter. Finally, connect the safety connector of the
adapter to a safety socket. Make sure that all connections are making

31
Now switch on the measuring device and the computer.
b) The data format consists of a frame of 14 bytes. The frames are set
as follows:
BYTE 1 2 3 4 5 6 7 8 9 A B C D E
Example 1) DC - 3 . 9 9 9 V CR
Example 2) 3 . 9 9 9 Mo h m CR
Communication Specifications for Data-Transfer:
Transfer Rate . .: 9600 Baud
Character Code .: 7-bit ASCII
Parity . . . . . . . .: None
Stop Bits . . . . . .: 2
6. Maintenance and Calibration
To ensure the long-term accuracy of the Multimeter, it should be cali-
brated annually. Our Calibration Dept. in "Service 2000" can complete
the calibration for you at a competitive price.
Fuse replacement is described in Section 2. (Safety rules). See Section 4.1
for battery replacement.
For cleaning the device and display, use a clean, dry, anti-static and lint-
free cleaning rag.
Attention!
When cleaning the housing, do not use detergents containing hydrog-
carbons, petrol, alcohol or similar. These chemicals could damage the
surface of the measuring unit. Besides solvent vapors are dangerous to
your health and explosive.
7. Technical Data and Accuracy
7.1 Technical Data
Display . . . . . . . . . . . . . . . .: 41/2-digit liquid cystal display (LCD),
maximum reading 19999 with automatic
polarity display
Max. Measuring Rate . . . . .: 2.5 measurements per second
Max. Input Current DC/AC .: 20 A
Operating Temperature . . .: 0 °C to +40 °C
30
5. In the third measurement program, (press the ”UP” button again)
with the reference number ”2”, the time-counter displays hours,
minutes and seconds. In the sub-display on the left the hours of the
power measurement are counted; in the centre sub-display the min-
utes and seconds are counted. The time display is activated as soon as
a consumer is connected and switched on, thereby using power.
6. In the fourth measurement program (press the ”UP” button again)
with the reference number ”3” you can set a so-called timer, a type
of time limit for the measurement time. The reference number
flashes. You can set the measurement time in hours (max. 99), min-
utes (max. 59) and seconds (max. 59) by using the ”SET/R”, ”UP” and
”DOWN” buttons. You can use this function for example to deter-
mine the stand-by consumption of a television or the power con-
sumption of a refrigerator or freezer over a period of 24 hours.
7. In the fifth measurement program (press the ”UP” button again) with
the reference number ”4”, the reference number flashes. You can
enter the kWh price here, e.g. 0.23 cents, using the buttons "SET/R",
"UP" or "DOWN". For a kWh price of 23 cents, the first digit position
remains at "0", i.e. press the button "SET/R" once. The second digit
position then starts to flash. Enter the digit 2 (=2 x UP) and press SET/R
to confirm. The third digit position then starts to flash. Enter the digit
3 (=3 x UP or 7 x DOWN) and press the button SET/R again to confirm.
Since the final digit position is also "0", re-confirm by pressing the
button SET/R again. The price per 1 kWh (in the center display) is now set.
8. The accumulated total costs as well as the overall performance can be
reset (to „0“) by switching off the meter and switching it back on
again.
5.13 Usage of the Mulitmeter in connection with a
Personal Computer
An extensive Windows software package (diskette and interface cable)
for interfacing to a computer is optionally available.
a) Connection
Connect an RS-232 interface cable (optionally available with the soft-
ware) to the Multimeter and with a serial interface of the deactiva-
ted computer.
Fig.6 Connection to a computer, (page 142)

33
Mode Accuracy Resolution
Measuring
Range
measuring voltage at the open circuit: < 1,2 V
time display needs to stabilize: 2 M
Ω approx. 5s
20 M
Ω approx. 15s
Resistance 200 Ω±(0,2%+10dgts) 0,01 Ω
Capacitance 2000 pF ±(2%+5dgts) 1
pF
200 kHz -"- 10 Hz
2 MHz -"- 100 Hz
20 MHz -"- 1 kHz
Diode test
buzzer sound for resistance < 30 Ω, 2.8 VDC max.
input sensitivity: > 50 mVrms (rms = effektiv)
max. input sensitivity: 250 VDC/VACrms
Logic test DC 20 V ±(0,05%+3dgts) 1 mV
frequency ±(0,1%+2dgts) range-depend.
Inductance 200 mH ±(3,0+10dgts) 0,01 mH=10 µH
Power 2000 W ±(3,0+10dgts) 0,1 W
measurement 3680 W ±(3,0+5dgts) 1 W
AC current (16 A max.): ±(2%+5dgts)
AC voltage (190 V – 250 V): ±(3%+3dgts)
Power factor (cos Phi): 0.000 – 1.000
Transistor test range: hFE 0 - 1000
Basis current: approx. 10 µA
VCE (UCE):
max. 2.8 V
test current: 1.0 mA max.
measuring voltage: 2.8 VDC max.
20 µF
±(3%+8dgts) 1 nF
200 nF -"- 10 pF
20
MΩ±(0,5%+5dgts) 1KΩ
2 KΩ±(0,15%+3dgts) 0,1 Ω
20 KΩ-"- 1 Ω
200 KΩ-"- 10 Ω
2
MΩ-"- 100 Ω
200 µF -"- 10 nF
32
Storage Temperature . . . . .: −10 °C to +50 °C
Relative Humidity . . . . . . . .: 0 to 90 % (0 °C to 35 °C)
0 to 70 % (35 °C to 50 °C)
Temperature Coefficient
for Guaranteed Accuracy . .: +23 °C ± 5 K (= Kelvin)
Battery Type . . . . . . . . . . . .: NEDA 1604 9V or 6F22 9V, alkaline
Weight . . . . . . . . . . . . . . . .: 350 g (without battery)
Dimensions (L x W x H) . . .: 187 x 87 x 34 mm
7.2 Accuracy
• Accuracies are ±(% of reading = rdg + number of digit(s) = dgt(s)).
• Accuracy is specified at 23 °C ±5 °C with a relative humidity of below
75 %.
• Warm-up time is 1 minute.
Mode
DC 200 mV ±(0,05%+3dgts) 10 µV
Voltage
20 V ———”——— 1 mV
200 V ———”——— 10 mV
1000 V ±(0,1%+5dgts) 100 mV
AC 10 µV
Voltage 2 V ———”——— 100 µV
20 V ———”——— 1 mV
200 V ———”——— 10 mV
Applies to the frequency range from 40 Hz to 1 kHz
True RMS measurement
DC Current
Frequency range, see AC voltage
True RMS
measurement
Measuring
Range Accuracy Resolution
200 mV ±(0,8%+10dgts)
750 V ±(1,0%+10dgts) 100 mV
2 mA ±(0,8%+10dgts) 100 nA
200 mA ±(1,0%+10dgts) 10 µA
20 A ±(1,2%+15dgts) 1
mA
2 V ———”——— 100 µV
200 mA ±(2,5%+5dgts) 10 µA
20 A ±(2,5%+15dgts) 1
mA
AC Current 2 mA ±(2,0%+5dgts) 100 nA
Frequency 20 kHz ±(0,1%+3dgts) 1 Hz

35
Multimètre numérique M-4660M
Nº de commande 12 48 00
Important ! A lire impérativement !
Lisez cette notice attentivement. Tout dégât causé par le non respect de
ce mode d’emploi annule automatiquement le droit de recours à la
garantie. Nous n’assumons aucune responsabilité quant aux dommages
secondaires.
Le cahier des charges de cet appareil répond aux critères suivants :
• Mesure de tensions continues jusque max. 1000 VDC en 5 niveaux
• Mesure de tensions alternatives jusque max. 750 VAC en 5 niveaux
• Mesure de courants continus et alternatifs jusque max. 20 A, pendant
max. 30 sec (non protégé), chacun en 3 niveaux
• Mesure de résistances jusque max. 20 MΩen 6 niveaux
• Mesure de capacités jusque max. 200 µF en 2 niveaux : Hi et Lo
• Mesure d’inductance (bobines) jusqu’à 200 mH
• Mesure de fréquence jusqu’à 20 MHz
•
Mesure de puissance jusqu’à 3680 W à l’aide de l’adaptateur (en option)
• Test de continuité, la vérification des diodes, des transistors, le test
logique
• N’utilisez pas cet appareil dans de mauvaises conditions. On entend
par là :
- l’humidité des lieux ou une atmosphère excessivement humide,
- la présence de gaz, de vapeurs, de solvants ou des poussières
inflammables,
- le temps orageux ou les champs électrostatiques puissants.
Toute autre utilisation de l’appareil risque de l’endommager et comporte
des risques de court-circuit, d’incendie, de choc électrique etc. Il est inter-
dit de modifier l’appareil. Respectez les consignes de sécurité !
F
34
7.3 Max. Input Limits
Voltage Measurement . . .: 1000 VDC or 750 VACrms
Current Measurement . . .: 20 A DC/AC A-range, max. 30 s with cool-off
time of at least 15 minutes max. 250 VDC/
VACrms
overload protection: quick-acting 15A 250 V
fuse (size: 6 x 30 mm)
200 mA AC/DC in the mA range, max. 250
VDC/VACrms
overload protection: quick-acting 0,8 A 250 V
fuse (size: 5 x 20 mm)
Resistance Measurement .: 20 MΩoverload protection: 250 V DC/ACrms
Frequency Measurement .: 20 MHz with max. 250 V DC/ACrms input
voltage
Logic Test . . . . . . . . . . . . .: overload protection 250 VDC/AC
Power measurement . . . .: 3680 W
Attention!
The measurement functions transistor test, diode test, capacitance and
inductance are not protected against excess load or input voltage(s)
which is/are too high.
Exceeding of the max. input limits will damage the measuring unit and
endanger the life of the user.