Sonel MZC-340-PV Fault Loop Impedance Meter User Manual

MZC-340-PV Fault Loop Impedance Meter

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Specifications

• Product: Fault Loop Impedance Meter
• Model: MZC-340-PV
• Manufacturer: SONEL S.A.
• Address: Wokulskiego 11, 58-100 widnica, Poland
• Version: 1.02
• Date: 17.05.2024

Product Information

The MZC-340-PV meter is a modern, top quality measuring
instrument that is easy and safe to use. It is essential to follow
the instructions provided in the manual to avoid measuring errors
and ensure smooth operation of the meter.

Product Usage Instructions

1. General Information

Review safety symbols, signaling LEDs behavior, and safety
guidelines.

2. Quick Start

Get started quickly with basic instructions.

3. Interface and Configuration

Understand the buttons on the housing and how to access the
network interface.

4. Measurements

Learn how to perform measurements accurately.

5. Memory of the Meter

Save measurement results, browse memory, and erase data when
needed.

6. Data Transmission

Connect the meter to a PC using accessories and transmit data
via USB or Wi-Fi.

7. Software Update

Update the software for improved functionality.

8. Troubleshooting

Find solutions to common issues, understand warnings displayed
by the meter, self-test error messages, and actions before sending
the device for repairs.

FAQ

Q: How do I ensure accurate measurements with the MZC-340-PV

meter?

A: Follow the guidelines in the manual carefully, ensure proper
calibration of the meter, and avoid exceeding the measurement
range.

Q: Can I transfer data from the meter to a PC wirelessly?

A: Yes, you can transmit data through Wi-Fi by following the
instructions provided in the manual and using the appropriate
accessories.

Q: What should I do if I encounter self-test error

messages?

A: Refer to the troubleshooting section of the manual to
understand the error messages and take necessary actions as
recommended.

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USER MANUAL FAULT LOOP IMPEDANCE METER
MZC-340-PV
SONEL S.A. Wokulskiego 11 58-100 widnica
Poland
Version 1.02 17.05.2024

The MZC-340-PV meter is a modern, top quality measuring instrument which is easy and safe to use, provided that the principles presented in this manual are observed. In addition, becoming acquainted with the manual will help you avoid measuring errors and will prevent any possible problems with the operation of the meter.

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MZC-340-PV ­ USER MANUAL

CONTENTS

1 General information……………………………………………………………………………..5
1.1 Safety symbols …………………………………………………………………………………………… 5 1.2 Behaviour of signalling LEDs ……………………………………………………………………….. 5 1.3 Safety ……………………………………………………………………………………………………….. 6
2 Quick start …………………………………………………………………………………………..7
3 Interface and configuration ………………………………………………………………….8
3.1 Buttons on the housing………………………………………………………………………………… 8 3.2 Calling the network interface ………………………………………………………………………… 9
3.2.1 Access Point operation mode………………………………………………………………………………..9 3.2.2 Working in a foreign wireless network …………………………………………………………………..10 3.2.3 Working with a control device operating in hotspot mode …………………………………………12 3.3 Network interface ……………………………………………………………………………………… 13 3.3.1 Menu icons ………………………………………………………………………………………………………13 3.3.2 Home page ………………………………………………………………………………………………………13 3.3.3 Data ………………………………………………………………………………………………………………..13 3.3.4 Settings……………………………………………………………………………………………………………13 3.3.5 Help ………………………………………………………………………………………………………………..14 3.3.6 Language selection ……………………………………………………………………………………………14
4 Measurements……………………………………………………………………………………15
4.1 Before you start ………………………………………………………………………………………… 15 4.1.1 Conditions for performing tests and obtaining correct results…………………………………….16 4.1.2 Connections for AC voltage measurements……………………………………………………………17 4.1.3 Connections for Zs measurements……………………………………………………………………….17 4.1.4 Displaying the measurement results in terms of impedance or short-circuit current ………20
4.2 AC voltage……………………………………………………………………………………………….. 21 4.3 Measurement of fault loop parameters ­ 4-pole method …………………………………. 22
5 Memory of the meter ………………………………………………………………………….24
5.1 Saving measurement result data to the memory ……………………………………………. 24 5.2 Memory browsing ……………………………………………………………………………………… 25 5.3 Memory erasing ……………………………………………………………………………………….. 25
6 Data transmission………………………………………………………………………………26
6.1 Set of accessories to connect the meter to a PC …………………………………………… 26 6.2 Data transmission through USB ………………………………………………………………….. 26 6.3 Data transmission through Wi-Fi …………………………………………………………………. 27
7 Software update …………………………………………………………………………………28
8 Troubleshooting…………………………………………………………………………………29
8.1 Warnings and information displayed by the meter …………………………………………. 29 8.1.1 Exceeding the measurement range………………………………………………………………………29 8.1.2 Battery status ……………………………………………………………………………………………………29
8.2 Self-test error messages ……………………………………………………………………………. 29 8.3 Before you send the device for repairs…………………………………………………………. 30
9 Power supply……………………………………………………………………………………..31
9.1 Power supply voltage monitoring ………………………………………………………………… 31

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9.2 Battery power …………………………………………………………………………………………… 31 9.3 Charging rechargeable battery ……………………………………………………………………. 32 9.4 General rules for using Li-Ion rechargeable batteries …………………………………….. 33
10 Cleaning and maintenance …………………………………………………………………34
11 Storage………………………………………………………………………………………………34
12 Dismantling and utilisation…………………………………………………………………34
13 Technical data ……………………………………………………………………………………35
13.1 Basic data ……………………………………………………………………………………………….. 35 13.1.1 Measurement of voltage (True RMS) ……………………………………………………………………35 13.1.2 Measurement of frequency………………………………………………………………………………….35 13.1.3 Measurement of short- circuit loop parameters using high current (Zs ­ 4-pole method, Imax=305 A) ……………………………………………………………………………………………………….35
13.2 Other technical data ………………………………………………………………………………….. 37 13.3 Additional data …………………………………………………………………………………………. 38
13.3.1 Additional uncertainties according to IEC 61557-3 (Z)……………………………………………..38
14 Manufacturer ……………………………………………………………………………………..38

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MZC-340-PV ­ USER MANUAL

1 General information

1.1 Safety symbols
The following international symbols are used in the device and/or in this manual:

Refer to the user manual for additional information and
explanations
DC current/voltage
Do not dispose of with other household waste

Ground
Double insulation (protection class)

AC current/voltage
Declaration of Conformity with EU directives
(Conformité Européenne)

Measurement categories according to EN IEC 61010-2-030:
· CAT II ­ concerns measurements performed in circuits directly connected to low voltage installations,
· CAT III ­ concerns measurements performed in buildings installations, · CAT IV ­ concerns measurements performed at the source of low voltage installation.

1.2 Behaviour of signalling LEDs

The LED is on continuously

The LED flashes slowly

MZC-340-PV ­ USER MANUAL

The LED flashes rapidly 5

1.3 Safety
The MZC-340-PV meter is designed for performing inspection tests for protection against electric shock in mains systems. The meter is used for making measurements and providing results to determine safety of electrical installations. Therefore, in order to provide the conditions for correct operation and accuracy of obtained results, the following recommendations must be observed: · Before you proceed to operate the meter, acquaint yourself thoroughly with the present manual
and observe the safety regulations and recommendations of the manufacturer. · Any application that differs from those specified in the manual may result in damage to the device
and constitute a source of danger for the user. · The meter must only be operated by appropriately qualified personnel with relevant certificates au-
thorising 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 and bystanders. · Using this manual does not exclude the need to comply with occupational health and safety regulations and with other relevant fire regulations required during the performance of a particular type of work. Before starting the work with the device in special environments, e.g. potentially firerisk/explosive environment, it is necessary to consult with the person responsible for health and safety. · It is unacceptable to operate: it is damaged and completely or partially out of order, its cords and cables have damaged insulation, it was stored for an excessive period of time in disadvantageous conditions (e.g. excessive hu-
midity) After moving the device from a cool to a warm place with a high level of relative humidity, do not start measurements until the device is warmed up to the ambient temperature (approximately 30 minutes). · Before measurement, choose a correct measurement function and make sure that the test leads are connected to their respective measuring terminals. · The correct operation of the instrument and accessories must be checked regularly to avoid any hazard which may result from erroneous results. · In a situation where the product works with other instruments or accessories, the lowest measurement category of the connected devices is used. · Do not power the meter from sources other than those listed in this manual. · Repairs may only be performed by an authorised service point.
WARNING
Only accessories for a given device should be used. Using other accessories may cause damage to measuring terminals, introduce additional measurement error and create a risk for the user.
Due to continuous development of the meter’s software, the actual appearance of the display for some features may slightly differ from that presented in this user manual. The latest version of the manual is provided on the manufacturer’s website.

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MZC-340-PV ­ USER MANUAL

2 Quick start

1

Turn the meter on.

2

Switch the meter to Access Point mode ( ) or foreign wireless network

mode ( ).

/

3

Connect your control device (tablet, smartphone, laptop, etc.) to the network broadcast by the meter or the network in which the meter operates.

4

Call up the meter’s network interface.

5

Enter the meter settings.

6

Enter the measurement settings.

7

Connect the meter to the tested object.

8

Start the measurement.

9

Save results

Save the result in the memory.

10

Turn the meter off.

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3 Interface and configuration
3.1 Buttons on the housing

· Turn on the meter (short press) · Turn off the meter (press and
hold)
Shutter switch: 12 V and USB socket/test lead sockets available

Data transmission to and from the device:
· directly ­ access point · indirectly ­ foreign wireless ne-
twork

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3.2 Calling the network interface

3.2.1 Access Point operation mode
In the Access Point (AP) mode, the meter emits its own wireless network to which a control device must be connected in order to activate the network interface. This network does not have access to the Internet, so neither will the control device.

1

Turn the meter on.

2

Switch the meter to AP mode. From now on, the meter emits its own Wi-Fi net-

work called: MZC-340-PV_MeterSerialNumber.

3

Connect your control device to the network emitted by the meter. Network password: mzc340pv.

Enter the address assigned to the meter into your web browser.

4

· If you have a device with Windows 11, IOS, Android 12 or newer (supports mDNS), enter: mzc-340-pv_MeterSerialNumber.local.

· In other cases, enter: 192.168.4.1.

Additional information displayed by the meter
The access point is being established
Access point established
Error occurred

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3.2.2 Working in a foreign wireless network
The meter and the control device on which its interface is to be called up can be logged in to a foreign wireless network. If this network has access to the Internet, the control device will also have it. However, the first configuration requires that the interface be called up in the Access Point (AP) mode.

1

Turn the meter on.

2

Switch the meter to AP mode. From now on, the meter emits its own Wi-Fi net-

work called: MZC-340-PV_MeterSerialNumber.

Set the rule in the control device that it should connect automatically to the network emitted by the meter as soon as it appears. This is important due to step 5 (the meter must exit and then reenter AP mode, i.e. the network emitted by it will disappear for some time).

3

Connect your control device to the network emitted by the meter. Network password: mzc340pv.

Enter the address assigned to the meter into your web browser.

4

· If you have a device with Windows 11, IOS, Android 12 or newer (supports mDNS), enter: mzc-340-pv_MeterSerialNumber.local.

· In other cases, enter: 192.168.4.1.

5

Go to Main menu Settings Wi-Fi and select the foreign network to which the meter should connect. Select Search Wi-Fi.

· If the network is saved in the meter’s memory, select it from the list and enter its password. Select Connect. The meter will exit AP mode, log in to the foreign network for a short time, and then return to AP mode. The IP address assigned by the network to the meter will appear on the screen.
· If the network is not in the meter’s memory, select + Add another network and enter its name and password. Select Connect. The meter will exit AP mode, log in to the foreign network for a short time, and then return to AP mode. The IP address assigned by the network to the meter will appear on the screen.

6

Switch the meter to the mode of operation in a foreign wireless network (button

or Settings Wi-Fi Change mode).

Connect the control device to a foreign network and enter the address that is

assigned to the meter into a web browser.

7

· If you have a device with Windows 11, IOS, Android 12 or newer (supports mDNS), enter: mzc-340-pv_MeterSerialNumber.local.

· In other cases, enter the IP address that the network assigned to the meter

(manually or via the QR code obtained in the Wi-Fi section).

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MZC-340-PV ­ USER MANUAL

· To check the IP of the meter when it works in a foreign network: · switch the meter to access point mode, · go to Main menu Settings Wi-Fi. Saved Wi-Fi is a foreign network in which the meter will work, and IP is the IP address that has been assigned to it. You will also get it in the form of a QR code after selecting the QR code button.
· After restarting, the meter automatically enters the mode of operation in a foreign network.
· After restarting, the meter will automatically connect to the last network saved in it.
Additional information displayed by the meter
The meter logs into a foreign network
The meter is logged into a foreign network
Error occurred

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3.2.3 Working with a control device operating in hotspot mode
The meter can be logged in to the hotspot generated by the control device. Internet access depends on whether the hotspot has data transmission enabled.

1

Turn the meter on.

2

Switch the meter to AP mode or operation mode in a foreign wireless network

and call up its network interface.

/

Go to Settings Wi-Fi and select Add Your Hotspot.

3

· Enter the name and password of the hotspot you want the meter to con-

nect to.

Settings · Select Connect with hotspot.

4

15 s

Within 15 seconds, turn on the hotspot on the control device. The meter will au-

tomatically switch to it after this time.

· While the countdown is in progress, you can extend the time until the meter switches by 15 seconds by pressing the appropriate button.
· You can cancel the upcoming switch by pressing the Cancel button.

Additional information displayed by the meter
The meter logs into a foreign network
The meter is logged into a foreign network
Error occurred

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MZC-340-PV ­ USER MANUAL

3.3 Network interface
3.3.1 Menu icons
Expand menu Close menu

Select interface language

3.3.2 Home page
Here is the measurement screen.
3.3.3 Data
Here you can view the contents of the device’s memory. · Load all memory ­ loading the entire meter memory into the control device. You can then export
the downloaded database to a file. · Deleting a cell ­ here you can move around the meter’s memory and delete results from selected
banks and memory cells. · Delete bank ­ here you can delete selected memory banks. · Erasing memory ­ here you can erase the entire meter memory.
3.3.4 Settings
3.3.4.1 Measurement settings Available settings: · Mains voltage ­ here you can configure the nominal mains voltage Un. · Zs measurement ­ here you can enable the measurement of touch voltage UST, touch shock
voltage UT or leave the default result. This value is related to the expected short-circuit current calculated according to the formula presented in sec. 4.1.4. The UST or UT value is displayed at the end of the measurement result list.
The measurement of touch shock voltage UT is performed after introducing a 1 k additional resistor (inside the device) between the terminals U2 and UST/T. The resistor simulates resistance of the human body, while the terminal UST/T is to be connected to the probe that simulates human feet located on the ground, whose properties and load are described by relevant standards.

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3.3.4.2 Data transmission Available settings: · Wi-Fi transmission ­ here you will allow data transmission between the meter and the computer
via the wireless network.
3.3.4.3 Wi-Fi Here you can manage wireless networks saved in the meter’s memory and check its IP in a given network. · Change mode ­ here you can switch the meter’s operating mode (access point / operation in a
foreign network). · Disconnect ­ here you can disconnect the meter from the network to which it is currently logged in. · Search Wi-Fi ­ here you can see a list of all networks saved in the meter. The meter only remem-
bers their names. Select the network in which the meter is to work, enter its password and select Connect. · + Add another network ­ here you can add a network that is not detected by the meter. · Add Your Hotspot ­ here you can connect the meter to the hotspot. See sec. 3.2.3. · QR code ­ here you will get a QR code with the current IP address of the meter when it works in a foreign wireless network.
3.3.4.4 Updates Here you can check the meter’s software version and update it. See also sec. 7.
3.3.5 Help
Here you will find answers to key issues and information about the manufacturer.
3.3.6 Language selection
In the upper right corner you will see an icon with the currently set interface language. Tap it to bring up the language change menu.

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MZC-340-PV ­ USER MANUAL

4 Measurements
WARNING
· During measurements, the earthed parts and parts accessible in the electrical installation being tested must not be touched.
· Connecting unsuitable or faulty cables can cause an electrical shock. · You must not leave disconnected leads while some of them remains connected
to the tested installation. · You must not leave the device unattended while it is connected to the test-
ed installation. · You must not touch appliances connected to the tested installation.
NOTE!
Connecting voltage higher than 900 V between any of the test terminals may damage the meter.
· Measurements of fault loop impedance performed downstream of inverters are ineffective and their results are unreliable. This is due to: · the instability of internal impedance in inverter circuits during its operation, · from the operation of the inverter’s overload and short-circuit protection both during measurements and in the case of an actual short in the circuit. The measurements of fault loop impedance should not be performed directly downstream of inverters.
· Performing a large number of consecutive measurements in short intervals can cause the resistor limiting the current flowing through the device to produce large amounts of heat which in turn can cause the device’s housing to become hot. This is quite normal. The device has a built-in overheating protection.
· During measurements with a current of an order of 300 A, the instrument, if necessary, activates a fan that reduces the instrument cool-down time.
· The minimum time interval between successive measurements is 5 seconds. The text READY displayed on the screen informs the user that the device is ready to perform the measurement
4.1 Before you start
· The manufacturer guarantees correct readings only if the original leads supplied with the device are used. Extension leads or third party cables can be a source of additional errors.
· If the tested installation includes RCD circuit breakers, you should bridge them for the duration of the test. You should keep in mind however that doing so you modify the tested circuit and consequently the results can marginally differ from the expected results.
· Remember to remove any modifications of the installations that were introduced and check the functioning of the RCD circuit breakers.
· Attention should be paid to the correct selection of test terminals since the precision of the measurements being performed depends upon the quality of connections made. They have to provide a good contact and allow for undisturbed flow of high current measured. For instance, it is unacceptable to clip the crocodile connectors onto oxidized or corroded points ­ they have to be either cleaned beforehand, or the test needle tip probe should be used for measurements.

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4.1.1 Conditions for performing tests and obtaining correct results
To start a test sequence a number of conditions have to be fulfilled. The device will automatically prevent a test from commencing (except for voltage measurement) if any of the conditions listed below is not satisfied.

Symptom
U > 900 V! + continuous beep
Error! f < 45 Hz or f > 65 Hz
+ two long beeps Error!
U~ < 200 V + two long beeps
No voltage on terminals I1, I2! + two long beeps
Different voltage phases on terminals U and I! + two long beeps
Incorrectly connected cable! Terminal UST/T! + two long beeps
Voltage failure while measuring! + two long beeps
Error while measuring! + two long beeps
Short circuit loop faulty! + two long beeps

Cause

Action

The voltage applied to meter’s ter- Immediately disconnect the meter

minals exceeds 900 V.

from the tested installation!

The voltage frequency in the installa- The text appears and a sound signal is

tion is outside of the range produced when the measurement

45 Hz…65 Hz.

is started.

The voltage applied to meter’s ter- The text appears and a sound signal is

minals is too low to measure the im- produced when the measurement

pedance.

is started.

Improperly connected lead I1 or I2.

The text appears and a sound signal is produced when the measurement is started.

Leads U or I swapped, or connected to different phases.

The text appears and a sound signal is produced when the measurement is started.

Improperly connected lead UST/T with The text appears and a sound signal is

the set option of touch voltage produced when the measurement

measurement.

is started.

While measuring the loop impedance a voltage drop below Umin took place.

While measuring the loop impedance a situation preventing completion of the measurement occurred.

While measuring the loop impedance the fuse was burnt or another emergency situation in the current circuit occurred.

+ beep

Thermal protection prevents the A sound signal is produced when the

measurement.

measurement is started.

Discharged battery.

Making the measurements is still possible, however, the user should take into account some additional errors.

Displayed warnings stay on the screen for 3 seconds.

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MZC-340-PV ­ USER MANUAL

4.1.2 Connections for AC voltage measurements

Alternating voltage measurement.

4.1.3 Connections for Zs measurements 4.1.3.1 Measurement of touch voltage UST and shock voltage UT

Measurement of touch voltage UST.

Measurement of shock voltage UT. 1 ­ probe.

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4.1.3.2 Measurement of short-circuit loop parameters ­ 4-pole method Measurement of impedance in working circuit (L-N).
Measurement of impedance in protective circuit (L-PE).
Measurement of impedance in working circuit (L-L).

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MZC-340-PV ­ USER MANUAL

a)

Verification of anti-shock

protection reliability of ap-

pliance’s housing for:

a) TN network,

b) TT network.

b)

Impedance measurement in the working circuit (L1-L2) of an IT mains on the example of a photovoltaic farm with an 800 V AC IT mains.

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4.1.4 Displaying the measurement results in terms of impedance or short- circuit current
The main measurement result is displayed as short-circuit loop impedance and short-circuit current. The device always measures impedance, and the short- circuit current displayed is calculated from the formula:

Ik

=

Un ZS

where:

Un ­ rated voltage of the network being tested, Zs ­ impedance measured.

The meter automatically recognizes the measurement for line voltage and takes it into account in calculations. In a case when the installation voltage is outside of tolerance, the meter will not be able to deter-
mine the rated voltage for the short-circuit current calculation. In such event the display will show horizontal dashes instead of the short-circuit current value. Fig. 1 shows voltage ranges for which the short-circuit current is calculated.

Fig. 1. Relationship between the network voltage and the ability to calculate the short-ciruit current ­ the UL-N voltage ranges, for which the network’s Un is identified and the short-circuit current is calculated ­ the UL-L voltage ranges, for which the network’s Un is identified and the short-circuit current is calculated 200 V…900 V ­ The voltage range for which the impedance measurement is performed
Further in this document the term ,,impedance measurement” will refer to performing the measurement and displaying the result in terms of current or impedance.

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MZC-340-PV ­ USER MANUAL

4.2 AC voltage
NOTE! Applying voltage in excess of 900 V to any of the test terminals may damage the meter.

1

Select Voltage measurement.

2 Connect test leads according to sec. 4.1.2. 3 Read the result ­ the measurement is performed continuously.

· The instrument measures alternating voltage with the frequency within range 45 Hz…65 Hz as True RMS without separating a possible constant component. Voltage with the frequency lower than 45 Hz is measured as direct voltage.
· If the frequency of the signal being measured is not included within the specified limits, instead of its value an appropriate message is displayed: f < 45 Hz or f > 65 Hz.

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4.3 Measurement of fault loop parameters ­ 4-pole method
WARNING
Use caution when operating the device as hot air that can be expelled by the built-in fans.
This is a measurement involving the current with a value of approx. 300 A. It is specifically designed for circuits with very low short-circuit loop impedance. After measurement, the following results are displayed: · ZS ­ fault loop impedance · IK ­ short-circuit current, · f ­ mains voltage frequency (current reading), · U ­ value of the mains voltage at the moment of measurement (current reading), · R ­ fault loop resistance, · XL ­ fault loop reactance.

1

Go to the Settings Measurement settings and set the rated network voltage and the type of voltage to be measured.

Settings

2

Select Impedance measurement.

3 Connect test leads according to sec. 4.1.3.

4 Unlock the measurement.

5

Start the measurement.

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MZC-340-PV ­ USER MANUAL

6 After the measurement is completed, read the result.

7

Save results

Save the result in the memory of the meter.

· If touch voltage is not measured, the user should go to Settings and select the ,,- -” option. Otherwise the displayed values will not be correct since they can induce interfering voltages in unconnected socket UST/T.
· The touch shock voltage UT measured by the meter refers to the nominal network voltage that was selected in the settings and at which the measurement was performed. For other rated voltages the result displayed should be converted.

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5 Memory of the meter
The meter has a built-in memory for storing up to 990 results of short-circuit loop parameters. A location in the memory where a single result is stored is called a memory cell. The whole memory is divided into 10 banks, each consisting of 99 cells. Every result can be stored in a cell with a specific address and in a selected bank. In this way the user can allocate the cell numbers to individual measuring points and the bank number to particular objects, make measurements in any sequence and repeat them without losing the other data.
The results storage is not erased when the meter is switched off. The data can be therefore retrieved at a later time or transferred to a computer. The address of the current cell or bank number does not change either.
It is recommended to erase the memory after the data has been read or before making a new series of measurements that can be stored to the same cells as the previous ones.

5.1 Saving measurement result data to the memory

Only the results of measurements made in the Zs mode can be saved in the memory.

1

Start the measurement.

2

Save results

Select Save results.

· Select the bank and cell number or leave the current numbers (recom-

mended if the bank was deleted before measurements).

3

· If the result is a fault loop value, enter the wire designations between which it was measured.

· If you have changed your mind about saving, select in the upper right

corner of the save window.

4

Save Confirm your selection.

· For an empty cell: the main result and its components, as well as the network voltage and frequency values at the moment of measurement, as well as the nominal network voltage, are saved in the memory.
· For a taken cell: an attempt to make an entry in an already taken cell results in a warning message. Selecting the Overwrite command will result in entering a new measurement result and losing the previous one. To cancel the entry and select another, free cell, select Cancel.

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MZC-340-PV ­ USER MANUAL

5.2 Memory browsing

1

Go to the Data section.

Data

Select Load all memory, and then Update meter data. The current contents of

2

the meter’s memory will be downloaded to the control device. Each bank con-

taining measurement data will have a blue label.

3

Select the bank with cells you want to view. The results list will expand.

The Download the CSV file command causes all data that was recalled from

4

the meter in the previous step to be downloaded to a CSV file after confirming

the command.

5.3 Memory erasing

1

Go to the Data section.

Data

Select Load all memory, and then Update meter data. The current contents of

2

the meter’s memory will be downloaded to the control device. Each bank con-

taining measurement data will have a blue label.

3

Select the appropriate option.

· Deleting a cell ­ select this option and then select the bank and cell number to delete the contents of this cell. If you have changed your mind, select
in the upper right corner of the window.
· Delete bank ­ select this option and then select the bank number to delete the contents of this bank.
· Erasing memory ­ select this option to clear all meter memory.

4

Delete Select Delete. If you change your mind, select Cancel.

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6 Data transmission

6.1 Set of accessories to connect the meter to a PC
In order to ensure the communication of the meter with a computer a USB cable and the relevant software are required: · Sonel Reader, · Sonel Reports PLUS.
The software may be used for many devices manufactured by SONEL S.A. which are equipped with a USB interface. Detailed information is available from the manufacturer and distributors.
If the required software has not been purchased with the meter, it may be obtained from the manufacturer or from an authorised distributor.

6.2 Data transmission through USB

1

Connect the cable to USB port of the computer and to the USB socket of the meter. Remote control of the meter is blocked.

2 Start the software to read/save data and proceed in accordance with its instructions. 3 After disconnecting the cable from the meter, you must wait until it restarts. Remote control
will be possible again.
USB communication, data transfer.

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MZC-340-PV ­ USER MANUAL

6.3 Data transmission through Wi-Fi

1

Connect the meter to a foreign wireless network.

2

Make sure that the software that creates a virtual COM port with port 3333 and IP address of the meter is installed in the control device.

3

In the network interface, go to Data section and then to Data transmission

Wi-Fi transmission.

Data

4 Start the software to read/save data and proceed in accordance with its instructions.

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7 Software update

NOTE!
· Before starting the update, charge the meter battery to 100%. · Do not turn off the meter while the update is in progress.

The

button is disabled during the update. The meter does not switch off automati-

cally in this function.

1

Connect the meter to a Wi-Fi network with Internet access (sec. 3.2.2).

2

In the network interface go to Settings Updates.

Settings

3

Select Update. Follow the displayed instructions.

If necessary, you can restore the previous version of the software. To do this, select Restore the previous software version in the menu.

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MZC-340-PV ­ USER MANUAL

8 Troubleshooting

8.1 Warnings and information displayed by the meter
The meter displays warnings that can be related to either its functioning or to external conditions affecting the measurement processes.

8.1.1

Exceeding the measurement range

Message

Audible signal

U > 900 V !

Continuous

OFL

–

Cause Voltage measured exceeds
900 V Short-circuit loop resistance
exceeds 2

Action Immediately disconnect the
meter from the network!
–

8.1.2 Battery status
Message

Cause Battery is discharged

Action Charge the battery

8.2 Self-test error messages
If, as a result of the self-test, the instrument detects an error, it stops the normal operation and displays an error message. The following messages can appear:
· Internal error · Damaged FLASH kernel! · Damaged calibration data The message that appears may be caused by a momentary interference or an external factor. You should therefore switch the device off and then on to determine if this is the case. If the problem persists, the device should be sent to a service agent.

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8.3 Before you send the device for repairs
Before you send the device to a service agent, you should contact the technical support to ensure that the problem is a result of a fault and is not caused by some other factors.
The repairs should be carried out only by service agents authorised by the manufacturer. In the table below you will find the procedures that should be followed in a case of a mal-function.

Symptom The meter does not switch on with the ON/OFF button.
Consecutive results obtained in the same measuring point differ markedly.

Cause Battery may be discharged.
Faulty connection in the installation being tested.

Action Charge the battery. If the problem persists send the device to the service agent Find and remove faulty connections.

Installation with a high level of Perform more measurements, average interference or unstable voltage. the results.

Measurement errors when the device is moved from a cold to a warm and humid environment. The meter shows values close to zero or zero irrespective of the measurement place, and the values deviate considerably from the anticipated values.

Lack of acclimatization. Fault in the short circuit loop.

Do not use the device until it reaches the ambient temperature (approx. 30 min) and dries out. Send the device to a service agent.

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MZC-340-PV ­ USER MANUAL

9 Power supply

9.1 Power supply voltage monitoring

The battery charge level is constantly displayed:

· on the meter: through the diodes on the housing ,

· in the network interface: by the symbol located in the upper right corner of the measurement

screen

.

9.2 Battery power
Miernik jest zasilany z akumulatora litowo-jonowego. The meter is powered by a 12 V power supply. It can be also charged from the car 12 V accessory socket, using an optional converter.

NOTE! Do not power the meter from sources other than those listed in this manual.

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9.3 Charging rechargeable battery

Charging starts once the power supply has been connected to the meter, regardless of whether the meter is on or off. It takes approximately 7 hours to fully charge a completely discharged battery.

When the meter is turned off by

button or by AUTO-OFF, the charging process is not stopped.

Indication of completed charging:

(meter) and

(network interface).

Additional information displayed by the meter

Charging in progress.

Charging complete

· Temperature of the battery pack is too low

or too high. Charging paused

· Other charging issues

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MZC-340-PV ­ USER MANUAL

9.4 General rules for using Li-Ion rechargeable batteries
· Store the meter with batteries charged at least to 50%. The battery pack may be damaged if stored when fully discharged. The ambient temperature for prolonged storage should be maintained within the range of 5°C…25°C. The environment should be dry and well ventilated. Protect the device from direct sunlight.
· Charge the batteries in a cool, well-ventilated place at a temperature of 10°C … 28°C. Modern fast chargers detect both too low and too high temperature of rechargeable batteries and react to the situation adequately. When the temperature is too low, charging is prevented as it may irreparably damage the batteries.
· Do not charge or use the batteries in extreme temperatures. Extreme temperatures reduce the lifetime of rechargeable batteries. Always observe the rated operating temperature. Do not dispose of the battery pack into fire.
· Li-Ion cells are sensitive to mechanical damage. This kind of damage may cause its permanent damage and thus cause ignition or explosion. Any interference in the structure of Li-ion battery pack may cause its damage. This may result in its ignition or explosion. A short-circuit of the battery poles “+” and “-” may permanently damage the battery pack or even cause its fire or explosion.
· Do not immerse Li-Ion battery in liquids and do not store in humid conditions. · If the electrolyte contained in the Lithium-Ion battery pack comes into contact with eyes or skin,
immediately rinse the affected area with plenty of water and consult with a doctor. Protect the battery against unauthorised persons and children. · When you notice any changes in the Lithium-Ion battery pack (e.g. changes in colour, swelling, excessive temperature), stop using the battery pack. Li-Ion batteries that are mechanically damaged, overcharged or excessively discharged are not suitable for use. · Any misuse of the battery may cause its permanent damage. This may result in its ignition. The seller and the manufacturer shall not be liable for any damages resulting from improper handling of the Li-Ion battery pack.

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10 Cleaning and maintenance
NOTE!
Use only the maintenance methods specified by the manufacturer in this manual.
The casing of the meter may be cleaned with a soft, damp cloth using all- purpose detergents. Do not use any solvents or cleaning agents which might damage the casing (powders, pastes, etc.).
The test leads should be cleaned with water and detergents, and then dried. The electronic system of the meter does not require maintenance.
11 Storage
In the case of storage of the device, the following recommendations must be observed: · disconnect all the test leads from the meter, · clean the meter and all its accessories thoroughly, · wind the test leads, · in order to prevent a total discharge of the battery pack in the case of a prolonged storage, charge
the device at least once every six months.
12 Dismantling and utilisation
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 regulations valid in a given region.
Before the equipment is sent to a collection point, do not dismantle any elements. Observe local regulations concerning disposal of packages, waste batteries and rechargeable batteries.

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MZC-340-PV ­ USER MANUAL

13 Technical data

13.1 Basic data
The abbreviation “m.v.” used in the specification of accuracy denotes a measured value

13.1.1 Measurement of voltage (True RMS)
Measurement range: 0 V…900 V

Display range

Resolution

0 V…249 V

1 V

250 V…900 V

1 V

· Frequency range: DC, 45…65 Hz · Input impedance of the voltmeter: 200 k

Accuracy (2% m.v. + 4 digits) (2% m.v. + 2 digits)

13.1.2 Measurement of frequency
Display range 45.0 Hz…65.0 Hz · Voltage range: 50 V

Resolution 0.1 Hz

Accuracy (0.1% m.v. + 1 digit)

13.1.3 Measurement of short-circuit loop parameters using high current (Zs ­ 4-pole method, Imax=305 A)
Measurement of short-circuit loop impedance ZS Measuring range according to EN IEC 61557: 7.2 m…1999 m

Display range for ZS Display range
0.0 m…199.9 m 200 m…1999 m · Voltage range: 200…900 V

Resolution
0.1 m 1 m

Accuracy (2% m.v. + 2 m)

Display range for short-circuit resistance RS and reactance XS

Display range

Resolution

0.0 m…199.9 m

0.1 m

200 m…1999 m

1 m

· Voltage range: 200…900 V

Display range for IK Measuring range according to EN IEC 61557:
· for Un = 230 V: 115.0 A…32.9 kA · for Un = 400 V: 200 A…55.5 kA · for Un = 500 V: 250 A…69.4 kA · for Un = 690 V: 345 A…95.8 kA · for Un = 800 V: 400 A…111.1 kA

Accuracy (2% + 2 m) of ZS value

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Display range for IK Display range
110.0 A… 199.9 A 200 A…1999 A
2.00 kA…19.99 kA 20.0 kA…199.9 kA

Resolution 0.1 A 1 A 0.01 kA 0.1 kA

Accuracy
Calculated from the short-circuit accuracy

Prospective fault current calculated and displayed by the meter may slightly differ from the value calculated by the user with a calculator, basing on the displayed value of the impedance, because the meter calculates the current from unrounded value of fault loop impedance (which is used for displaying). As the correct value, consider IK current value, displayed by the meter or by firmware.

Measurement of touch voltage UST (shock voltage UT)

Display range

Resolution

Accuracy

0 V…100 V

1 V

(10% m.v. + 2 digits)

· for UT ­ resistor simulating electrical resistance of the human body ­ 1 k

Maximum test current · 230 V: 130 A (20 ms) · 400 V: 220 A (20 ms) · 500 V: 280 A (20 ms) · 690 V: 190 A (20 ms) · 800 V: 220 A (20 ms)

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MZC-340-PV ­ USER MANUAL

13.2 Other technical data
a) type of insulation acc. to EN 61010-1 and EN 61557 ……………………………………………………………………………………..double b) measurement category acc. to EN IEC 61010-2-030 ………………………………………………………………………… CAT IV 1000 V c) ingress protection acc. to EN 60529
with open housing ……………………………………………………………………………………………………………………………………… IP20 with closed housing…………………………………………………………………………………………………………………………………… IP67 d) power supply ……………………………………………………………………………………………. Li-Ion 7.2 V 9.8 Ah rechargeable battery e) dimensions ……………………………………………………………………………………………………………………………429 x 328 x 236 mm f) weight ……………………………………………………………………………………………………………………………………………………. ca. 9 kg g) storage temperature ………………………………………………………………………………………………………………………..-20°C…+60°C h) operating temperature ……………………………………………………………………………………………………………………..-10°C…+40°C i) humidity …………………………………………………………………………………………………………………………………………….. 20%…90% j) reference temperature……………………………………………………………………………………………………………………… +23°C ± 2°C k) reference humidity ………………………………………………………………………………………………………………………………. 40%…60% l) rated operating altitude…………………………………………………………………………………………………………………………… 2000 m m) auto-off function……………………………………………………………………………………………………………………………………….. 10 min n) number of short-circuit loop measurements…………………………………………………………… min. 5000 (2 measurements/min) o) display ………………………………………………………………………………………………………………………………………………………..none p) memory of measurement results…………………………………………………………………………………………………………… 990 results q) transmission of results………………………………………………………………………………………………………………………….USB, Wi- Fi r) quality standard ………………………………………………………development, design and manufacturing are ISO 9001 compliant s) the device meets the requirements of………………………………………………………………………………………………………EN 61557 t) the product meets EMC requirements (immunity for industrial environment) according to the following standards …………. …………………………………………………………………………………………………………………………………..EN 61326-1, EN 61326-2-2
EN 55022 Compliance statement
MZC-340-PV is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures (e.g. increasing the distance between affected products).
SONEL S.A. hereby declares that the radio device type MZC-340-PV 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/

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13.3 Additional data
Data on additional uncertainties are useful mainly when the meter is used in non-standard conditions and for metrological laboratories for the purpose of calibration.

13.3.1 Additional uncertainties according to IEC 61557-3 (Z)

Significant parameter
Position Supply voltage Temperature 0°C…35°C Phase angle 0°…30° at the bottom of
test range Frequency 99%…101% Network voltage 85%…110%
Harmonics DC component

Designation E1 E2 E3
E6.2
E7 E8 E9 E10

Additional uncertainty 0%
0% (BAT is not lit) 0%
0.6%
0% 0% 0% 0%

14 Manufacturer
The manufacturer of the device and provider of guarantee and post-guarantee service:
SONEL S.A. Wokulskiego 11 58-100 widnica
Poland tel. +48 74 884 10 53 (Customer Service)
e-mail: customerservice@sonel.com web page: www.sonel.com
NOTE!
Service repairs must be performed only by the manufacturer.

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MZC-340-PV ­ USER MANUAL

NOTES

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NOTES

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MZC-340-PV ­ USER MANUAL

2

References

• sonel.com
• sonel.com/
• sonel.pl/en/download/declaration-of-conformity/

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