Sonel CMM-10 Manuale utente
OPERATING MANUAL
AUTORANGING MULTIMETER
CMM-10
Version 1.7
2
Multimeter CMM-10 has been designed for the purpose of
measurements of AC/DC voltage, AC/DC current, resistance,
capacitance, frequency, duty cycle, temperature and also for testing
diodes and continuity.
The most important features of CMM-10 are:
•automatic or manual regulation of the measurement range,
•DATA HOLD function, which facilitates readings of
measurements in the case of insufficient lighting or in
inaccessible places,
•REL function, which allows you to make measurements relative
to a stored reference value,
•circuit continuity sound signalling,
•the function of automatic switching of the meter into the standby
mode in order to prolong the durability of batteries,
•3 7/8 digits display (5000 counts).
3
1
INTRODUCTION...................................................5
2
SAFETY...................................................................6
3
PREPARATION OF THE METER FOR
OPERATION .................................................................... 7
4
FUNCTIONAL DESCRIPTION............................9
4.1
MEASUREMENT SOCKETS AND ELEMENTS OF SELECTION OF THE
MEASUREMENT FUNCTION....................................................................9
4.1.1
Sockets..............................................................................10
4.1.2
Elements of selection of the measurement function...........10
4.2
LCD DISPLAY...........................................................................11
4.3
TEST LEADS..............................................................................11
5
INTERNATIONAL SAFETY SYMBOLS..........12
6
MEASUREMENTS...............................................12
6.1
DC VOLTAGE MEASUREMENTS.................................................12
6.2
AC VOLTAGE MEASUREMENTS.................................................13
6.3
DC CURRENT MEASUREMENTS.................................................14
6.4
AC CURRENT MEASUREMENTS.................................................15
6.5
RESISTANCE MEASUREMENTS ..................................................16
6.6
CONTINUITY MEASUREMENTS .................................................16
6.7
DIODE MEASUREMENTS...........................................................17
6.8
CAPACITANCE MEASUREMENTS ...............................................18
6.9
FREQUENCY OR %DUTY CYCLE MEASUREMENTS ....................18
6.10
TEMPERATURE MEASUREMENTS ..............................................18
7
SPECIAL FUNCTIONS.......................................19
7.1
AUTORANGING/MANUAL RANGE SELECTION............................19
7.2
RELATIVE MODE.......................................................................19
7.3
DATA HOLD FUNCTION .........................................................20
7.4
DISPLAY BACKLIGHT................................................................20
8
BATTERY REPLACEMENT.............................. 20
9
THE FUSES REPLACEMENT........................... 22
10
CLEANING AND MAINTENANCE ..................22
11
STORAGE .............................................................23
4
12
DISMANTLING AND UTILIZATION ..............24
13
ATTACHMENTS..................................................24
13.1
TECHNICAL DATA.....................................................................24
13.2
STANDARD EQUIPMENT............................................................27
13.3
MANUFACTURER......................................................................27
5
1 Introduction
The CMM-10 meter is a modern, high-quality measuring device,
which is easy and safe to use. Please acquaint yourself with the
present manual in order to avoid measuring errors and prevent
possible problems related to operation of the meter.
In the present manual we apply three kinds of warnings. These
are texts in frames, which describe possible dangers both for the
user and the meter itself. The messages starting from the word
‘WARNING:’ describe situations which imply a risk for life or health
should the recommendations presented in the present manual not
be observed. The word ‘CAUTION!’ introduces a description of a
situation where non-observance of the recommendations presented
in the present manual may imply damage for the meter. Indications
of possible problems are preceded by the word ‘Note:’.
WARNING:
The purpose of the CMM-10 meter is to realise
measurements of AC/DC voltage, AC/DC current, resistance,
capacitance, frequency, duty cycle, diode test, continuity
and temperature. Using the meter in a manner which does
not comply with the recommendations specified in the
present manual may lead to its damage and constitutes a
source of a serious risk for the user.
WARNING:
The CMM-10 meter may be operated solely by qualified and
properly authorised personnel for work at electric
installations. Using the meter by unauthorised personnel
may lead to its damage and constitutes a source of a serious
risk for the user.
6
WARNING:
Before using the instrument acquaint yourself with the
present manual and observe the safety regulations and
recommendations specified by the manufacturer.
2 Safety
In order to guarantee proper operation and correctness of the
obtained results it is necessary to observe the following
recommendations:
•Before commencing operation of the meter please acquaint
yourself thoroughly with the present manual,
•The instrument should be operated solely by properly qualified
personnel, who also must be trained regarding the industrial
safety regulations,
•Use great care when making measurements if the voltages are
greater than 30VAC rms or 60VDC. These voltages are
considered a shock hazard,
•Do not exceed the maximum allowable input range of any
function,
•Never ground yourself when taking electrical measurements.
Do not touch exposed metal pipes, outlets, fixtures, etc., which
might be at ground potential. Keep your body isolated from
ground by using dry clothing, rubber shoes, rubber mats, or any
approved insulating material,
•Turn off power to the circuit under test before cutting,
unsoldering, or breaking the circuit. Small amounts of current
can be dangerous,
•When using the probes, keep your fingers behind the finger
guards on the probes,
•If “OL” appears in the display during a measurement, the value
exceeds the range you have selected. Change to a higher ran-
ge,
•It is prohibited to operated the meter:
⇒If it is damaged and completely or partially out of order,
⇒If the insulation of the test leads has been damaged,
7
⇒If it has been stored for an excessive period of time in
inadequate conditions (e.g. if it is humid),
•Repairs must be realised solely by an authorised service
workshop.
WARNING:
Do not realise measurements in environments in which there
are inflammable gases. Otherwise operation of the meter
under such conditions may cause sparking and explosion.
CAUTION!
Input Limits
Function Maximum Input
V DC or V AC 600VDC/AC rms
mA AC/DC 500mA 250V fast acting fuse
A AC/DC 10A 250V fast acting fuse
Frequency, resistance,
capacitance, duty cycle, diode
test, continuity 250VDC/AC rms
Temperature 250VDC/AC rms
3 Preparation of the meter for operation
Having purchased the meter examine completeness of the
contents of the package.
Before measurements commence, it is necessary to realise the
following actions:
•Make sure the conditions of the batteries or accumulators
permit to realise measurements,
•Make sure the casing of the meter and the insulation of the test
leads are not damaged,
8
•Insert the black test lead into the negative COM terminal and
the red test lead into the other positive terminal,
•ALWAYS turn the function switch to the OFF position when the
meter is not in use. This meter has Auto OFF that automatically
shuts the meter OFF if 30 minutes elapse between uses.
WARNING:
Connection of inappropriate or damaged test leads
constitutes a risk of an electric shock with a dangerous
voltage.
Note:
On some low AC and DC voltage ranges, with the test leads
not connected to a device, the display may show a random,
changing reading. This is normal and is caused by the high-
input sensitivity. The reading will stabilize and give a proper
measurement when connected to a circuit.
9
4 Functional description
4.1 Measurement sockets and elements of
selection of the measurement function
CMM-10
10
4.1.1 Sockets
3 measurement socket 10A
Measurement socket for the purpose of measurements of
direct current up to 10A.
4 measurement socket COM
Measurement socket common for all the measurement
functions.
5 measurement socket VΩTEMPHz%mAµA
Measurement socket for all the measurement functions
except of 10A current measurements.
4.1.2 Elements of selection of the measurement function
1 5000 count Liquid Crystal Display with symbolic signs
2 Rotational selector
Selection of function:
•Temp – Celsius or Fahrenheit temperature measurement
•Hz% – frequency and duty cycle measurement
•ΩCAP –resistance, capacitance and continuity
measurement and diode testing
•V–AC and DC voltage measurement
•OFF – meter off
•10A –AC and DC current measurement up to 10A
•mA –AC and DC current measurement up to 400mA
•µA–AC and DC current measurement up to 400µA
6 MODE button
•Measurement mode selection: Ohm / Diode / Continuity /
Cap, DC / AC, Hz / %Duty
7 RANGE button
•Manual range selection
8 HOLD button
•Data Hold function
•Back Light function
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