CMP-402 - Measurement Sonel - Free user manual and instructions

Product Type	Clamp Meter (True RMS)
Measurement Functions	AC/DC Voltage, AC Current (400 A), Resistance, Capacitance, Frequency, Duty Cycle, Temperature (-20 to +1000°C), Diode Test, Continuity Test
AC Current Range	40.00 A / 400.0 A (auto/manual ranging)
AC Voltage Range	4.000 V to 1000 V (True RMS)
DC Voltage Range	4.000 V to 1000 V
Resistance Range	400.0 Ω to 40.00 MΩ
Capacitance Range	9.999 nF to 99.99 mF
Frequency Range (Voltage)	99.99 Hz to 99.99 kHz
Special Functions	NCV Detector, VFD Mode, INRUSH (starting current), PEAK MAX/MIN, HOLD, REL, Backlight, Flashlight, Auto-Off
Display	4-digit LCD, 4000 counts, with backlight and function indicators
Power Supply	3 x AAA 1.5 V batteries (alkaline recommended)
Battery Life	Not specified; typical alkaline life ~200 hours
Dimensions (L x W x H)	220 x 80 x 39 mm
Weight (with batteries)	266 g
Safety Rating	CAT III 600 V, double insulation, Class II
Ingress Protection	IP30
Operating Temperature	+5 to +40°C
Storage Temperature	-20 to +60°C
Accessories Included	Test leads, temperature probe (K-type thermocouple), batteries, manual
Warranty	Standard manufacturer warranty; service by SONEL S.A.

Frequently Asked Questions - CMP-402 Sonel

How do I measure AC current with the CMP-402?

Set the rotary switch to 40A~ or 400A~. Press MODE/VFD to select AC (~). Clamp the jaws around a single conductor and read the display.

Can I measure DC current?

The CMP-402 measures AC current only. For DC current, consider the CMP-403 model which supports both AC and DC.

How do I use the non-contact voltage (NCV) detector?

Set the rotary switch to any position. Touch the tip of the detector (top of the clamp) to the object. If AC voltage is present, the indicator light glows red. It detects 100-1000 V AC.

How do I perform a continuity test?

Set the rotary switch to •))) . Connect black lead to COM and red to VΩCAP terminal. Touch probes to the circuit. The meter beeps if resistance is below ~50 Ω.

How to measure resistance?

Set the switch to Ω CAP. Connect leads as for continuity. Touch probes to the resistor (disconnect from circuit). Read the value on the display.

How do I measure temperature?

Set the switch to Temp °C °F. Connect the K-type thermocouple adapter to COM and VΩCAP terminals. Insert the probe into the adapter (red +, black -). Touch the probe tip to the object and wait for stable reading.

What is the INRUSH function and how do I use it?

INRUSH captures starting current during the first 100 ms of device startup. To use: set to AC current range, press PEAK/INRUSH briefly, clamp around the power cord, then turn on the device. The display shows the inrush current.

How do I replace the batteries?

Set the rotary switch to OFF. Remove test leads. Unscrew the battery compartment cover at the back. Replace with 3 x AAA 1.5 V batteries observing polarity. Reattach cover and tighten screw.

What does 'OL' on the display mean?

OL means Over Limit – the measured value exceeds the current range. Switch to a higher range manually or use autoranging (press and hold RANGE).

How do I enable the backlight and flashlight?

Press and hold REL button for 2 seconds to toggle display backlight. Press and hold H button to toggle the flashlight. Brief press of H activates HOLD (freeze reading).

USER MANUAL CMP-402 Sonel

Illustration of a black handheld clamp meter with orange handle and control panel (no text or symbols)

INSTRUKCJA OBSŁUGI 1

USER MANUAL 34

MANUAL DE USO 67

UWAGA!

h) test diody.... I = 1,0 mA, U₀ < 3,0 V DC

CMP-402 / 403 True RMS multimeter is intended for measuring direct and alternating voltage, direct ( ) and alternating current, resistance, capacitance, frequency, duty cycle (filling) and temperature and for testing diodes and circuit continuity.

The most important features of CMP-402 / 403 include:

• possibility of carrying out measurements in the output circuits of inverters and frequency converters,
  • non-contact voltage detector,
  • automatic and manual range setting,
• REL function for relative measurements,
• PEAK MAX/PEAK MIN function for displaying maximum and minimum peak values,
• the INRUSH function captures the starting current precisely in the beginning of 100-millisecond period when the device is just started,
• HOLD function used to maintain the read-pot on the meter screen,
• 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 4000).

CONTENTS

1 Introduction...... 38

2 Safety 39

2.1 General rules....39
2.2 Safety symbols....40

3 Preparing the meter for operation.... 41

4 Functional description 43

4.1 Measuring terminals and functions 43
4.2 Display 46
4.3 Leads 47

5 Measurements.... 48

5.1 Current measurement....48
5.2 Non-contact voltage detector....49
5.3 Voltage measurement 50
5.4 Frequency measurement....50
5.5 Measurement % of duty cycle (pulse filling indicator)......51
5.6 Measurement of resistance ....51
5.7 Circuit continuity test 52
5.8 Diode test....52
5.9 Measurement of capacitance....53
5.10 Temperature measurement ....54

6 Special features 55

6.1 Button REL 55

6.1.1 REL function 55
6.1.2 Display backlight 55

6.2 RANGE button 56

6.3 Button MODE/VFD 56

6.3.1 Changing the measurement mode 56
6.3.2 VFD function....56

6.4 PEAK/INRUSH button....57

6.4.1 PEAK MAX/PEAK MIN function 57
6.4.2 INRUSH function....57

6.5 Button H 58

6.5.1 HOLD function 58

6.5.2 Flashlight function 58

6.6 Auto-Off....58

7 Replacing the batteries 59

8 Maintenance and care 60

9 Storage 61

10 Dismantling and disposal 61

11 Specifications 62

11.1 Technical data....62

11.2 Operating data 65

12 Service....66

The icon with the meter name is placed next to sections of that refer to specific features of the device. All other parts of relate to all types of the instrument.

1 Introduction

Thank you for purchasing Sonel multimeter. CMP-402 / 403 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 ⚠️ WARNING describe situations, which may endanger user's life or health, when instructions are not followed. Texts ⚠️ CAUTION! begin a description of a situation, which may result in device damage, when instructions are not followed. Indication of possible problems is preceded by symbol 🧿

WARNING

• CMP-402 / 403 meter is designed to measure the AC/DC current and 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.
• CMP-402 / 403 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.
• 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.

2 Safety

2.1 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):

Normal locations	Wet locations
60 V DC	35 V DC
30 V AC RMS	16 V RMS
42.4 V AC of peak value	22.6 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,
• hold the measuring probes by the spot 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.
• 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.

The limit values of the input signal
Function	The maximum input value
A DC ( ) A AC	400 A DC/AC
V DC, V AC, voltage frequency, duty cycle	1000 V DC/AC RMS
Resistance, continuity, diode test, capacitance, temperature	300 V DC/AC RMS

2.2 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

Terminals with this marking cannot be connected to a circuit where the voltage to ground exceeds the maximum safe voltage of the device.

3 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,
• 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 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.
• 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 batteries.

WARNING

Do not use the meter if the cover of battery compartment is removed.

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.

4 Functional description

4.1 Measuring terminals and functions

1 Non-contact voltage detector
2 Current clamp
3 Flashlight
4 Indicator light of the non-contact voltage detector
5 Button H /

• HOLD mode – freezing the measurement results on the display (press briefly)
• flashlight mode (press and hold)
  6 Clamp-opening trigger
  7 Rotary switch

Function selection:

• CMP-402 400A \~ - measurement of alternating current up to 400 A
• CMP-403 400A ≈ - measurement of direct and alternating current up to 400 A
• CMP-402 40A \~ - measurement of alternating current up to 40 A
• CMP-403 40A ≡ – measurement of direct and alternating current up to 40 A
• Temp °C °F – temperature measurement
• CAP – measurement of resistance, capacitance
  • measurement of continuity, diode test
• measurement of direct voltage
• Hz% VFD – measurement of alternating voltage, measurement of frequency and duty cycle, measurement of current and voltage behind the inverter, frequency converter, in the VFD system
• OFF – the meter is switched off

Button REL

○ REL mode – press briefly:

⇒ Reset display (DC current measurement)

⇒ Displaying the measurement result related to the reference value (other measuring functions)

○ Activating the backlight of the display (press and hold)

LCD display

Function buttons

- RANGE button

○ automatic (press and hold)

○ manual (press briefly)

- MODE / VFD button

The choice of sub-functions and modes assigned to the selected measurement function

○ Changing the measurement mode in functions: A / temperature measurement / resistance / capacitance / continuity / diode test / V / frequency / duty cycle (press briefly)

○ Measurement of current and voltage behind the inverter, frequency converter, in the VFD system (press and hold)

- PEAK / INRUSH button

○ Displays peak value of the measured signal (press briefly)

○ Displays the starting current (press briefly)

COM measuring terminal

Measuring input, common for all measuring functions excluding current.

Measurement terminal VΩCAP Hz%Temp

Measuring input for measurements other than current measurement.

4.2 Display

AUTO Automatic range setting

H HOLD function activated

VFD Measurement behind the inverter, frequency converter, in the VFD system

APO Auto-off mode

INRUSH Inrush current

P Peak value

MAX / MIN Maximum / Minimum value

°C / °F Temperature measurement in Celsius / Fahrenheit degrees

Relative measurement

Alternating signal

Constant signal

Low battery

n / μ / m / k / N The prefix of multiple measurement unit

V Voltage measurement

A Current measurement

F Measurement of capacitance

Ω Measurement of resistance

Hz Measurement of frequency

% Duty cycle measurement

- Negative read-out value

OL Exceeded measurement range

4.3 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.

• The probes are equipped with additional removable tip guards.
• The probes must be stored in a designated area.

5 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.

5.1 Current measurement

WARNING

Disconnect the test leads before measuring current using clamp.

To perform the current measurement:

- set the rotary switch at:

- press MODE/VFD button to display the following symbol:

⇒ , if you are measuring alternating current,
⇒ , if you are measuring direct current,

• use the clamp-opening trigger and attach the clamps on the tested conduit. Only one conduit must be within the testing range of the clamps,
• read the measurement result on the display.

If DC current is measured and the meter is not attached to the tested circuit, but it still indicates a non-zero value, then you must reset it by pressing and holding REL button.

5.2 Non-contact voltage detector

WARNING

• The detector is designed to detect the presence of a voltage, not for determining its absence.
• Electric shock hazard. Before using the tester, check if its operational by testing it on a known AC voltage (i.e. next applicable socket with live voltages).

To activate the detector:

• set the rotary switch at any position,
• touch the tip of the detector to the tested object.
  If the AC voltage is present, the indicator light will glow red.

• The wires in the extension cords are often twisted. For best results, move the tip of the detector along the wire to locate the live line.
• The indicator has a high sensitivity. It can be randomly actuated by static electricity or other energy sources. This is normal.
• The type and thickness of the insulation, distance from the power source, shielded cables and other factors may affect the operation of the tester. If you are unsure about the test result, check the presence of voltage in a different way.

5.3 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 probe touch the metal contacts inside the socket.

CAUTION!

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 (direct voltage) or Hz% VFD (alternating voltage),
• connect black test lead to COM terminal, and red test lead to VΩCAP→+●)) Hz%Temp terminal,
• contact the tips of test probes to the points of measurement,
• read the measurement result on the display.

5.4 Frequency measurement

To perform frequency measurement:

• set the rotary switch at % VFD,
• press MODE/VFD button to display Hz on the screen,
• connect black test lead to COM terminal, and red test lead to VΩCAP→+●)) Hz%Temp terminal,
• contact the tips of test probes to the points of measurement,
• read the measurement result on the display.

5.5 Measurement % of duty cycle (pulse filling indicator)

To perform the measurement:

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

5.6 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 measurement of resistance:

• set the rotary switch at CAP,
• connect black test lead to COM terminal, and red test lead to VΩCAP → + ●)) Hz%Temp terminal,
• 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.

5.7 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 •▶,
• connect black test lead to COM terminal, and red test lead to VΩCAP Hz%Temp terminal,
• 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.

5.8 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 •▶,
• press MODE/VFD button, to display ▶ V on the screen,
• connect black test lead to COM terminal, and red test lead to VΩCAP → Hz%Temp terminal,
• 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.

5.9 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 CAP,
• press MODE/VFD button to display nF on the screen,
• connect black test lead to COM terminal, and red test lead to VΩCAP → Hz%Temp terminal,
• contact the probe tips to the tested capacitor,
• read the measurement result on the display.

5.10 Temperature measurement

To perform the measurement:

• set the rotary switch at Temp °C °F,
• to change the unit, press MODE/VFD,
- place the adapter of the temperature probe in COM terminal (black leg) and VΩCAP→●)) Hz%Temp (red leg):

- place the temperature probe in the adapter, as shown in the figure:

⇒ thin pin of the probe (marked as +) fits to terminal +;
⇒ thick pin of the probe (marked as K) fits to terminal –;
⇒ reversed connection of the probe is mechanically impossible,

- contact the head of the temperature probe to the device under test. Maintain the contact of the probe head with the part of the device under test, until the reading stabilizes.

- read the measurement result on the display,

- after completing the measurements, disconnect the probe from the meter.

CAUTION!

Risk of burns. The temperature probe heats up, adapting to the temperature of tested object.

6 Special features

6.1 Button REL

6.1.1 REL function

This mode enables a measurement relative to a reference value.

• To enable the mode, press briefly REL . Then, the displayed readout value is taken as the reference value, and the readout will be reset.
• From this moment, the readings will be presented as the ratio of the measured value to the reference value.
• To disable the mode, press REL

The displayed main result is the difference between the reference value (read-out at the moment of activating REL mode) and the current read-out. Example: if the reference value is 20 A, and the current reading is 12.5 A, then the main result on the display will be -7.5 A. If the new reading is identical to the reference value, then the result will be zero.

• When the function is activated, the automatic adjustment of the measuring range is not available.
• If the reading is outside the measurement range, symbol OL is displayed In this situation, turn off the function and manually switch to a higher range.
• This function is not available for diode test, continuity test and duty cycle.

6.1.2 Display backlight

Pressing and holding REL button for 2 seconds will turn ON/OFF the display backlight function.

6.2 RANGE button

The button is used to set the measuring range.

⇒ To enable the automatic function, press and hold RANGE button longer than 1 second.
⇒ To manually toggle through the measuring ranges, press RANGE button.

6.3 Button MODE/VFD

6.3.1 Changing the measurement mode

Press briefly MODE/VFD button to switch between the available measurement modes.

6.3.2 VFD function

To measure the AC voltage behind the inverter, frequency converter or in the VFD system:

• set the rotary switch to the voltage or current measurement position,
• press and hold the MODE/VFD button until the "VFD" symbol appears.
  To disable the mode, press and hold the MODE/VFD button.

6.4 PEAK/INRUSH button

6.4.1 PEAK MAX/PEAK MIN function

PEAK function allows user to record very short alternating voltage surges.

The meter will update the display each time a lower negative, or higher positive peak occurs. Auto Power Off feature will be disabled automatically in this mode.

⇒ To activate the mode, press briefly the PEAK/INRUSH button.

⇒ To disable the mode, press and hold the PEAK/INRUSH button.

- This function is available only when measuring AC voltage.

- While PEAK is active, autoranging is disabled, therefore it is advised to start the function after connecting test leads to the measurement point. Running PEAK before that may cause overrange symbols to appear.

6.4.2 INRUSH function

The INRUSH function captures the starting current precisely in the beginning of 100-millisecond period when the device is just started. To perform the measurement:

• activate the AC measurement,
• press briefly PEAK/INRUSH button,
• fasten the clamp on the cord supplying power to the tested object,
• turn ON the tested object,
• read the results.

To disable the mode, press and hold the PEAK/INRUSH button.

• This function is available only when measuring AC current.
• While INRUSH is active, autoranging is disabled, therefore it is advised to start the function after connecting test leads to the measurement point. Running INRUSH before that may cause overrange symbols appear.

6.5 Button H

6.5.1 HOLD function

This function is used to 'freeze' the measurement result on the display. To do this, briefly press H button. When the function is enabled, the display shows symbol H.

To return to the normal operation mode of the device, press H button again.

6.5.2 Flashlight function

Briefly press H to turn on or off the flashlight mode.

6.6 Auto-Off

The meter automatically shuts off after 15 minutes of user inactivity. Symbol APO in 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/VFD button,
• set the rotary switch at the desired measuring function,
• wait until the meter reaches the measurement readiness,
• release MODE/VFD button. When the automatic shutdown is deactivated, the display does not show APO.

Each pass of the rotary switch through "OFF" position with non-pressed MODE/VFD button, will activate again the Auto-Off function.

7 Replacing the batteries

WARNING

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

CMP-402 / 403 is powered by three LR03 AAA 1.5 V batteries. It is recommended to use alkaline batteries.

To replace the batteries:

• set the rotational function selector at OFF.
• remove test leads from the terminals of the meter.
• turn the fixing screw of the compartment cover to the position:

• remove the cover.
• remove the batteries and insert a new ones, observing the polarity,
• put on the cover and turn the fixing screw to the position:

• While performing the measurements with the low battery symbol displayed, the user must be aware of additional measurement uncertainties or unstable operation of the device.
• If the meter does not work properly, check the batteries in order to ensure that they are in proper condition and properly installed in the device.

8 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 meter.
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.

The electronic system of the meter does not require maintenance.

9 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 batteries.

10 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.

11 Specifications

11.1 Technical data

⇒ "m.v." means a standard measured value.

True RMS measurement for AC current

Range	Resolution	Accuracy
40.00 A	0.01 A	± (2.0% m.v. + 8 digits)
400.0 A	0.1 A	± (2.5% m.v. + 8 digits)

• All AC current ranges are specified from 5% to 100% of range
  • Frequency range: 50 Hz...60 Hz
  • Overload protection: 400 A

CMP-403 DC current measurement

Range	Resolution	Accuracy
40.00 A	0.01 A	± (2.0% m.v. + 8 digits)
400.0 A	0.1 A	± (2.5% m.v. + 8 digits)

• Overload protection: 400 A

True RMS voltage and VFD measurement

Range	Resolution	Accuracy for f = 50 Hz...60 Hz (all waveforms)	Accuracy for f = 50 Hz...1 kHz (sine waveforms)
4.000 V	0.001 V	± (1.2% m.v. + 5 digits)	± (1.2% m.v. + 5 digits)
40.00 V	0.01 V
400.0 V	0.1 V
1000 V	1 V	± (1.5% m.v. + 5 digits)	± (1.5% m.v. + 5 digits)

• All AC voltage ranges are specified from 5% to 100% of range
• Input impedance: 10 MΩ
  • Frequency range: 50 Hz...1000 Hz
  • Overload protection: 1000 V DC/AC RMS
  • AC voltage range for VFD function: 100 V...600 V

DC voltage measurement

Range	Resolution	Accuracy
4.000 V	0.001 V	± (1.0% m.v. + 3 digits)
40.00 V	0.01 V
400.0 V	0.1 V	± (1.2% m.v. + 5 digits)
1000 V	1 V

• Input impedance: 10 MΩ
  • Overload protection: 1000 V DC/AC RMS

Resistance measurement

Range	Resolution	Accuracy
400.0 Ω	0.1 Ω	± (1.0% m.v. + 4 digits)
4.000 kΩ	0.001 kΩ	± (1.5% m.v. + 2 digits)
40.00 kΩ	0.01 kΩ
400.0 kΩ	0.1 kΩ
4.000 MΩ	0.001 MΩ	± (2.0% m.v. + 5 digits)
40.00 MΩ	0.01 MΩ	± (3.0% m.v. + 8 digits)

• Overload protection: 300 V DC/AC RMS

Capacitance measurement

Range	Resolution	Accuracy
9.999 nF	0.001 nF	unspecified
99.99 nF	0.01 nF	± (4.5% m.v. + 20 digits)
999.9 nF	0.1 nF	± (3.0% m.v. + 5 digits)
9.999 μF	0.001 μF
99.99 μF	0.01 μF
999.9 μF	0.1 μF
9.999 mF	0.001 mF
99.99 mF	0.01 mF	± (5.0% m.v. + 5 digits)

• Overload protection: 300 V DC/AC RMS

Frequency measurement – current

Range	Resolution	Accuracy
99.99 Hz	0.01 Hz	± (1.0% m.v. + 5 digits)
999.9 Hz	0.1 Hz

- Sensitivity: >20A, >45 Hz

Frequency measurement – voltage

Range	Resolution	Accuracy
99.99 Hz	0.01 Hz	± (1.0% m.v. + 5 digits)
999.9 Hz	0.1 Hz
9.999 kHz	0.001 kHz
99.99 kHz	0.01 kHz

• Sensitivity: >2 V RMS
  • Overload protection: 1000 V DC/AC RMS

Duty cycle measurement

Range	Resolution	Accuracy
20.0... 80.0%	0.1%	± (1.2% m.v. + 10 digits)

• Pulse amplitude: ≥ 5 V
• Pulse width: 0.1 ms...100 ms
  • Frequency: 45 Hz...10 kHz

Temperature measurement

Range	Resolution	Accuracy
-20.0...+1000°C	0.1 or 1°C	± (3% m.v. + 3°C)
-4.0...+1832°F	0.1 or 1°F	± (3% m.v. + 5°F)

• The accuracy of the temperature probe is not taken into account
  • Overload protection: 300 V DC/AC RMS

11.2 Operating data

a) measurement category according to IEC 61010-1....CAT III 600 V (II 1000 V)

b) type of insulation ....double, Class II

c) housing type .... double-composite

d) degree of housing protection acc. to EN 60529 IP30

e) pollution degree....2

f) opening of measurement clamp 30 mm (1.2")

g) power supply of the meter 3 x AAA 1.5 V battery

h) diode test I = 1.0 mA, U₀ < 3.0 V DC

i) continuity test ....acoustic signal for R < 50 Ω ....measuring current <1.5 mA

j) indication for range exceeding ....OL symbol

k) low battery indication ....symbol

I) measurement rate ....3 measurements per second

m) INRUSH function - sampling time....48 Hz (RMS), 400 kHz (clock) - integration time....100 ms - sensitivity....>2 A AC

n) VFD function - operating voltage .... 100..600 V AC

o) range of the non-contact voltage detector 100...1000 V AC (50/60 Hz)

p) response time for PEAK function .... <10 ms

q) temperature sensor ....type K thermocouple

r) input impedance 10 MΩ (V AC/DC)

s) AC read-out......True RMS (A AC and V AC)

t) AC bandwidth - sine waveforms....50...2000 Hz - all waveforms....50...60 Hz

u) display....4 digit LCD with backlit ....4000 counts with function indicators

v) dimensions 220 x 80 x 39 mm

w) meter weight - CMP-402.... 266 g - CMP-402 (without batteries) .... 230 g - CMP-403.... 270 g - CMP-403 (without batteries) .... 234 g

x) operating temperature....+5..+40°C

y) operating humidity....< 80% for temp. ≤ 31°C decreasing linearly to 50% at temp. 40°C

z) storage temperature....-20..+60°C

aa) storage humidity ....../< 80%

bb) maximum operating altitude....2000 m

cc) Auto-Off function 15 min

dd) compliance with the requirements of the following standards....EN 61326-1, EN 61326-2 ....IEC 61010-1, EN 61010-02-032, EN 61010-02-033 ....RoHS 2011/65/EU, (EU) 2015/863, EN 62479:2010, EN 50663:2017

ee) quality standard ....ISO 9001

12 Service

The provider of guarantee and post-guarantee services is:

SONEL S.A.

Wokulskiego 11

58-100 Świdnica

Poland

tel. [phone] (Customer Service)

e-mail: [e-mail]

web page: www.sonel.com

CAUTION!

Service repairs must be performed only by the manufacturer

MANUAL DE USO

MEDIDOR DE PINZA DIGITAL

CMP-402 • CMP-403

¡ATENCIÓN!

VORSICHT!

h) Diodentest I = 1,0 mA, U₀ < 3,0 V DC