Sonel CMM-11 Multimeter User Manual

**Sonel CMM-11 Multimeter User Manual

**

CMM-11 multimeter is intended for measuring direct and alternating voltage, direct and alternating current, resistance, capacitance, frequency, duty cycle (filling) and for testing diodes and circuit continuity.

The most important features of CMM-11 include:

• Bluetooth wireless communication used for transmitting the measurement results to mobile devices with Android OS,
• automatic and manual range setting,
• HOLD function used to maintain the read-pot on the meter screen,
• the backlight of the screen to read the measurement results in poor light,
• built-in flashlight for lighting the measurement location,
• sound signal for circuit continuity,
• AUTO-OFF function,
• 4-digit display (read-out 9999).

Introduction

Thank you for purchasing Sonel multimeter. CMM-11 meter is a modern, easy and safe measuring device. Please acquaint yourself with this manual in order to avoid measuring errors and prevent possible problems in operation of the meter.

This manual contains three types of warnings. They are presented as a framed text describing the possible risks for the user and the device. Texts starting with word ‘WARNING’ describe situations, which may endanger user’s life or health, when instructions are not followed. Word ‘CAUTION!’ begins a description of a situation, which may result in device damage, when instructions are not followed. Indication of possible problems is preceded by word ‘Note’.

WARNING:

CMM-11 meter is designed to measure the current and AC/DC voltage, frequency, resistance, capacitance, as well as to test the circuit continuity and diodes. Any application that differs from those specified in the present manual may result in a damage to the device and constitute a source of danger for the user.

WARNING:

CMM-11 meter must be operated only by appropriately qualified personnel with relevant certificates authorising the personnel to perform works on electric systems. Unauthorized use of the meter may result in its damage and may be a source of serious hazard to the user.

WARNING:

Before operating the device, read thoroughly this manual and observe the safety regulations and guidelines provided by the producer. Failure to follow instructions specified in this manual may result in a damage to the device and be a source of serious hazard to the user.

Safety

General rules

In order to provide conditions for correct operation and the correctness of the obtained results, the following recommendations must be observed:

• before using the meter read carefully this manual,
• the meter should be operated only by qualified persons that have passed health and safety training,
• be very careful when measuring voltages exceeding (as per IEC 61010-1:2010/AMD1:2016):
  • 60 V DC,
  • 30 V AC RMS,
  • 42.4 V AC of peak value, as they generate a potential risk of electric shock,
• do not exceed the maximum limits of the input signal,
• during the voltage measurements do not switch the device in the current or resistance measuring mode and vice versa,
• when changing ranges, always disconnect the test leads from the tested circuit,
• measuring probes should be kept in the space provided, restricted by a special barrier to avoid accidental contact with exposed metal parts,
• If during the measurement symbol OL appears on the screen, it indicates that the measured value exceeds the measurement range,
• It is unacceptable to operate:
  • a damaged meter which is completely or partially out of order,
  • a device with damaged insulation of test leads,
  • a meter stored for an excessive period of time in disadvantageous conditions (e.g. excessive humidity).
• repairs may be carried out only by an authorised service point.

WARNING:
Never start the measurements if you have wet or damp hands.

WARNING:
Do not perform measurements in explosive atmosphere (e.g. in the presence of flammable gases, vapours, dusts, etc.). Using the meter in such conditions may result in sparking and cause an explosion.

CAUTION!
The limit values of the input signal

Safety symbols

This symbol located near another symbol or terminal, indicates that the user should read the further information contained in the manual.

This symbol located near the terminal, indicates that in normal use there is a possibility of dangerous voltages.

Protection class II – double insulation

Preparing the meter for operation

After purchasing the meter, check whether the content of the package is complete.

Before performing the measurement:

• make sure that the battery level is sufficient for measurements,
• make sure that the device has fuse installed and efficient,
• check whether the meter casing and insulation of the test leads are not damaged,
• to ensure consistent measurement results it is recommended to connect black lead to COM terminal and red lead to other terminals,
• when the meter is not in use, set the function switch in OFF position.

The device has the AUTO-OFF function triggered after approx. 15 minutes of user inactivity. To turn the meter on again, set the function switch to OFF position and then set it at the desired function.

WARNING:
Connecting wrong or damaged leads may cause electric shock.

WARNING:
The meter must not be connected to the voltage source when it is set to current or resistance measurement or to diode test. Failure to observe this precaution may damage the meter! 

When using the meter, be sure to:

• discharge capacitors in the tested power sources,
• disconnect the power supply when measuring the resistance and diode tests,
• turn off the meter and disconnect test leads before removing the back cover to replace the battery or fuses.

WARNING:
Do not use the meter if the cover of battery and/or fuse compartment is removed.

Note:
It is possible that in certain low ranges of AC or DC voltage, when the meter is not connected to the leads, the screen will show random and variable readings. This is a normal phenomenon, which results from the input sensitivity with high input resistance. When connected to a circuit, the read- out will stabilize and the meter will provide the correct value.

Functional Description

Measuring terminals and functions

LCD with 4-digit display

MAX/MIN/R button

• Displaying the highest / lowest value from those currently recorded
  • To enable the function – press shortly
  • Selection of maximum or minimum value – press shortly
  • To disable the function – press and hold longer than 1 s.
• Manual change of the measuring range
  • To enable the function – press and hold longer than 1 s.
  • Range selection – press shortly
  • To disable the function – press and hold

Function button

• Flashlight mode (press shortly)
• Wireless communication mode (press and hold)

Button HOLD

• Freezing the measurement results on the display (press shortly)
• Activating the backlight of the display (press and hold)

Rotary switch

Function selection:

• μA – measurement of direct and alternating current, up to 400.0 μA
• mA – measurement of direct and alternating current, up to 400.0 mA
• 10A – measurement of direct and alternating current, up to 10 A
• OFF – the meter is switched off
• – measurement of AC voltage, frequency, and duty cycle
• **– DC** voltage measurement
• ** CAP** – measurement of resistance, continuity, capacitance, diode test

1. Measuring terminal VΩHz% mACAP
   Measuring input for measurements other than current measurement up to 10 A.

2. COM measuring terminal
   Measuring input, common for all measuring functions.

3. Measuring terminal 10A
   Measuring input for AC and DC measurements, up to 10 A.

4. MODE button
   Changing the measurement mode: DC / AC / Hz / % / V / resistance / continuity / diode test / capacity

5. Battery compartment cover (at the rear of the device)

6. Fuse compartment cover (at the rear of the device)

Display

Leads

The manufacturer guarantees the correctness of read-outs only when original test leads are used.

WARNING:
Connecting wrong leads may cause electric shock or measurement errors.

Note:
The probes are equipped with additional removable tip guards.

Measurements

The content of this chapter should be thoroughly read and understood since it describes methods of measurements and basic principles of interpreting measurement results.

Measurement of alternating voltage (AC)

WARNING:
Electric shock hazard. The ends of measuring probes, due to their length, may not reach the live parts inside some network connections of low-voltage electrical equipment, because the contacts are arranged inside the sockets. In such a case, the read-out will be 0 V with the simultaneous presence of voltage in the socket. Before acknowledging the absence of voltage in the socket make sure that the ends of the of the probe touch the metal contacts inside the socket.

NOTE
Do not measure the voltage when an electric motor located within the circuit is being switched on or off. Resulting voltage spikes may damage the meter.

To perform AC voltage measurement:

• set the rotary switch at ,
• shortly press MODE button, until symbol AC is shown on the display,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• contact the tips of test probes to the points of measurement,
• read the measurement result on the display.

Frequency measurement

To perform frequency measurement:

• set the rotary switch at ,
• press MODE button, until symbol Hz is shown on the display,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• contact the tips of test probes to the points of measurement,
• read the measurement result on the display

Measurement % of duty cycle (pulse filling indicator)

To perform the measurement:

• set the rotary switch at ,
• press MODE button, until symbol % is shown on the display,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• contact the tips of test probes to the points of measurement,
• read the measurement result on the display.

DC voltage measurement

WARNING:
Electric shock hazard. The ends of measuring probes, due to their length, may not reach the live parts inside some network connections of low-voltage electrical equipment, because the contacts are arranged inside the sockets. In such a case, the read-out will be 0 V with the simultaneous presence of voltage in the socket. Before acknowledging the absence of voltage in the socket make sure that the ends of the of the probe touch the metal contacts inside the socket.

NOTE
Do not measure the voltage when an electric motor located within the circuit is being switched on or off. Resulting voltage spikes may damage the meter.

To perform DC voltage measurement:

• set the rotary switch at ,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• contact the tips of test probes to the points of measurement; red probe should be applied to the point of higher potential,
• read the measurement result on the display.

Measurement of resistance

WARNING:
Do not perform measurements on the circuit under the voltage. Before the measurement disconnect the power and discharge capacitors.

To perform the resistance measurement:

• set the rotary switch at Ω CAP,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• press MODE button, to display Ω on the screen,
• contact the tips of test probes to the points of measurement; the best solution is to disconnect one side of the tested element, to prevent the remaining part of the circuit interfere with the read-out of the resistance value,
• read the measurement result on the display.

Circuit continuity test

WARNING:
Do not perform measurements on the circuit under the voltage. Before the measurement disconnect the power and discharge capacitors.

To perform the continuity test:

• set the rotary switch at Ω CAP,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• press MODE button, to display on the screen,
• contact the tips of test probes to the points of measurement,
• read the measurement result on the display; the beep will be activated when resistance values are below approx. 50 Ω.

Diode test

WARNING:
Do not perform measurements on the circuit under the voltage. Before the measurement disconnect the power and discharge capacitors. Do not test the diode under voltage. 

To perform the diode test:

• set the rotary switch at Ω CAP,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• press MODE button, to display and V on the screen,
• contact the tips of test probes to the diode. The red test probe should contact the anode and the black should contact cathode,
• read the test result on the display – the forward voltage is displayed.
  • For a typical silicon rectifier diode, it is approx. 0.7 V, and for a germanium diode it is approx. 0.3 V
  • For LEDs with a low power, typical voltage value is in the range of 1.2…5.0 V depending on the colour.
  • If the diode is polarized in the reverse direction, or there is a break in the circuit, the display will show OL.
  • When the diode is shorted, the meter will show a value near 0 V,
• after completing the measurements, remove test leads from the terminals of the meter.

Measurement of capacitance

WARNING:
Risk of electric shock. Disconnect the power supply from the tested capacitor and discharge all capacitors before any starting capacity measurements.

To perform the measurement:

• set the rotary switch at Ω CAP,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• press MODE button, to display nF on the screen,
• contact the probe tips to the tested capacitor,
• read the measurement result on the display.

Current measurement

WARNING:
To avoid the electric shock, the device must not be connected to circuits in which the measuring voltage exceeds 600 V.

NOTE
Do not make current measurements of 10 A for longer than 30 seconds. Exceeding this time may cause damage to the meter and/or test leads.
When the current of 10 A, the interval between successive tests should be approx. 15 minutes.

The range of 10 A

To perform the current measurement:

• set the rotary switch at 10A,
• press MODE button to display the following values on the display:
  • AC, if you measuring Alternating Current,
  • DC, if you measuring Direct Current,
• connect black test lead to COM terminal and red test lead to 10A terminal,
• disconnect the power supply from the tested circuit and then connect the meter in series (for DC circuits: connect the red probe to the positive pole),
• turn on the power supply of the circuit,
• read the measurement result on the display.

Range of mA, µA

To perform the current measurement:

• set the rotary switch at mA or μA (it is recommended to start the measurement from the position of the rotary switch in the higher range)
• press MODE button to display the following values on the display:
  • AC, if you measuring Alternating Current,
  • DC, if you measuring Direct Current,
• connect black test lead to COM terminal, and red test lead to VΩHz% mACAP terminal,
• disconnect the power supply from the tested circuit and then connect the meter in series (for DC circuits: connect the red probe to the positive pole),
• turn on the power supply of the circuit,
• read the measurement result on the display.

Special Features

MAX/MIN/R button

MAX/MIN function

• To enable the mode, press MAX/MIN/R.
  • Press MAX/MIN/R button to switch between the extreme values of the on-going measurement.
  • MAX control light – the meter displays the highest value out of existing measurement readings.
• MIN control light – the meter displays the lowest value out of existing measurement readings.
• To disable the function, press and hold MAX/MIN/R button for approx. 1 second.

Manual change of the range

• To enable the function, press and hold MAX/MIN/R button longer than 1 second.
• Press MAX/MIN/R, to switch the measuring range.
• To disable the function, press and hold MAX/MIN/R button

Button

Flashlight

Shortly press button, to turn on or off the flashlight mode.

Wireless communication

The multi meter is equipped with a wireless data transfer mode for devices with installed Sonel Multi meter Mobile MM software. To enable the mode, long press button. The meter will be visible in the Bluetooth manager of any receiver device as CMM-11.
Details of cooperation with the mobile application are provided in Sonel Multimeter Mobile MM manual.

Button HOLD

HOLD function

This function is used to ‘freeze’ the measurement result on the display. To do this, shortly press HOLD button. When the function is enabled, the display shows symbol H .
To return to the normal operation mode of the device, press HOLD button again.

Display backl ight

Pressing and holding HOLD button for 2 seconds will turn ON/OFF the display back light function.

Auto-Off

The meter automatically shuts off after 15 minutes of user inactivity. Symbol in the upper left corner of the display indicates activated function.

Auto-off function may be temporarily disabled. For this purpose:

• set the rotary switch at OFF position,
• press and hold MODE button,
• set the rotary switch at the desired measuring function,
• wait until the meter reaches the measurement readiness,
• release MODE button.

Note:
Each pass of the rotary switch through “OFF” position with non-pressed MODE button, will activate again the Auto-Off function.

Replacing the battery

CMM-11 is powered by two LR03 AAA 1.5 V batteries or two NiMH LR03 AAA 1.2 V rechargeable batteries. It is recommended to use alkaline batteries.

Note:
While performing the measurements with the battery symbol displayed, the user must be aware of additional measurement uncertainties or unstable operation of the device.

WARNING:
If the test leads are left in the terminals during replacement of the batteries, they may generate a risk of electric shock. 

To replace the battery:

• remove test leads from the terminals of the meter.
• set the rotational function selector at OFF,
• lift the foot at the back of the meter,
• use a Phillips screwdriver to loosen the three screws fixing the rear cover,
• remove the cover,
• replace discharged batteries with new ones, observing the polarity,
• put on the cover and tighten the fixing screws.

WARNING:
To avoid electric shock, do not use the meter if the battery compartment cover is not in place or is not properly fastened.

Note:
If the meter does not work properly, check the fuses and batteries in order to ensure that they are in proper condition and properly installed in the device.

Fuse replacement

WARNING:
If the test leads are left in the terminals during replacement of the fuses, they may generate a risk of electric shock.

To replace the fuse:

• remove test leads from the terminals,
• set the rotational function selector at OFF,
• lift the foot at the back of the meter,
• use a Phillips screwdriver to loosen the three screws fixing the rear cover,
• remove the cover,
• gently pry and remove the blown fuse from its bracket,
• install a new fuse,
• put on the cover and tighten the fixing screws.

NOTE
Always use fuses ceramics of the same type (0.5 A/600 V quick acting fuses for the range of µA and mA and 10 A/600 V quick acting fuses for the range of 10 A).

WARNING:
To avoid electric shock, do not use the meter if the fuse compartment cover is not in place or is not properly fastened.

Maintenance and care

The digital multimeter has been designed for many years of reliable use, provided that the following recommendations are observed for its maintenance and care:

1. THE METER MUST BE DRY. Wipe the dampened mater.
2. THE METER MUST BE USED AND STORED IN NORMAL TEMPERATURES. Extreme temperatures may shorten the life of electronic components and distort or melt plastic parts.
3. THE METER MUST BE HANDLED CAREFULLY AND GENTLY. Dropping the meter may damage its electronic elements or the housing.
4. THE METER MUST BE KEPT CLEAN. From time to time wipe the housing with a damp cloth. DO NOT use chemicals, solvents or detergents.
5. USE ONLY NEW BATTERIES OF RECOMMENDED SIZE AND TYPE. Remove the old or discharged batteries from the meter to avoid leakage and damage.
6. IF THE METER IS TO BE STORED FOR LONGER THAN 60 DAYS, remove the batteries and keep them separately.

Note:
The electronic system of the meter does not require maintenance.

Storage

During the storage of the device, the following recommendations must be observed:

• disconnect the test leads from the meter,
• make sure that the meter and accessories are dry,
• when the device is to be stored for longer time, remove the battery.

Dismantling and Disposal

Worn-out electric and electronic equipment should be gathered selectively, i.e. it must not be placed with waste of another kind. Worn-out electronic equipment should be sent to a collection point in accordance with the law of waste electrical and electronic equipment.
Before the equipment is sent to a collection point, do not dismantle any elements.
Observe local regulations concerning disposal of packages, waste batteries and accumulators.

Specifications

Technical data

• “m.v.” means a standard measured value.

True RMS measurement for AC current

• Frequency range:
  • 50 Hz…60 Hz (other cycles)

DC current measurement

True RMS voltage measurement

• Input Impedance: 10 M
• Frequency range:
  • 50 Hz…60 Hz (other cycles)

DC voltage measurement

• Input impedance: 10 M

Measurement of resistance

Measurement of capacitance

Measurement of frequency

Duty cycle measurement

• Sensitivity: the minimum value of the effective voltage of 8 V
• Pulse width: 100 µs – 100 ms
• Frequency: 5 Hz to 99.99 kHz

Operating data

a) measurement category according to IEC 61010-1……………………………………CAT III 600 V
b) type of insulation ……………………………………………………………………………….double, Class II
c) degree of housing protection acc. to PN-EN 60529 ……………………………………………….IP65
d) pollution degree …………………………………………………………………………………………………….. 2
e) power supply of the meter………………………………………………………….2 x AAA 1.5 V battery
…………………………………………………………………. 2 x AAA NiMH 1.2 V rechargeable battery
f) diode test …………………………………………………………………………. I = 0.3 mA, U0 < 3.3 V DC
g) continuity test …………………………………………………I < 0.5 mA, acoustic signal for R < 50 Ω
h) indication for range exceeding …………………………………………………………………..OL symbol
i) low battery indication ……………………………………………………………………….. symbol
j) measurement rate ………………………………………………………….2 measurements per second
k) input impedance …………………………………………………………………………….~6 MΩ (V AC/DC)
l) AC read-out …………………………………………………………………….True RMS (A AC and V AC)
m) LCD Display,………………………………………………………………………………… 4 digit with backlit
…………………………………………………………………………..9999 counts with function indicators
n) dimensions…………………………………………………………………………………….121 x 67 x 45 mm
o) meter weight ……………………………………………………………………………………………………206 g
p) meter weight (without batteries)…………………………………………………………………………181 g
q) fuses………………………………………………………………….mA and µA range: 0.5 A / 600 V fast,
…………………………………………………………………………………………A range: 10 A / 600 V fast
r) operating temperature ………………………………………………………………………………. +5..+40C
s) operating humidity …………………………………………………………………< 80% for temp. ≤ 31C
………………………………………………………………….. decreasing linearly to 50% at temp. 40C
t) storage temperature …………………………………………………………………………………-20..+60C
u) storage humidity ……………………………………………………………………………………………..< 80%
v) maximum operating altitude ……………………………………………………………………………2000 m
w) Auto-Off function ………………………………………………………………………………..approx. 15 min
x) compliance with the requirements of the following standards ………………………………………..
……………………………………………………………………………………………………………..EN 61010-1
………………………………………………………………………………. EN 61010-031, EN 61010-2-033
……………………………………………………………………………………….EN 61326-1, EN 61326-2-2
y) quality standard …………………………………………………………………………………………ISO 9001

Note:
SONEL S.A. hereby declares that the radio device type CMM-11 complies with Directive 2014/53/EU. The full text of the EU Declaration of Conformity is available at the following website address:
https://sonel.pl/en/download/declaration-of-conformity/

Bluetooth specification

Version …………………………………………………………………………………………. v4.0+EDR
Frequency range ………………………………………. 2400 MHz…2483,5 MHz (ISM band)
Guard band………………………………………………………………………2 MHz < f < 3,5 MHz
Modulation method…………………………………………………… GFSK, 1 Mbps, 0,5 gauss
Receiving signal range………………………………………………………………. -82…-20 dBm
Transmission power minimum ………………………………………………………-18…+4 dBm

Standard accessories

The standard set of equipment supplied by the manufacturer includes:

• CMM-11 meter,
• test leads (2 pcs) – WAPRZCMM1,
• two LR03 AAA 1.5 V batteries,
• user manual,
• factory calibration certificate.

The current list of accessories can be found on the manufacturer’s website.

Service

The provider of guarantee and post-guarantee services is:

SONEL S.A.
Wokulskiego 11
58-100 Świdnica
Poland
tel. +48 74 858 38 60
fax +48 74 858 38 09
e-mail: export@sonel.pl
web page: www.sonel.pl

Note:
Service repairs must be performed only by the manufacturer.

v1.09 05.04.2023

References

• Offer to sell domain: somel.pl
• Sonel S.A.
• Sonel S.A.
• Sonel S.A.
• Sonel S.A.

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