Sonel MPI-540 User manual

USER MANUAL
METER FOR ELECTRICAL
INSTALLATION PARAMETERS
MPI-540
SONEL S.A.
Wokulskiego 11
58-100 Świdnica
Version 1.00 31.10.2018

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MPI-540 meter is a modern, easy in use and safe measuring device. Please acquaint your-self with
this manual in order to avoid measuring errors and prevent possible problems in operation of the me-
ter.

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CONTENTS
1Safety ................................................................................................................7
2Main menu ........................................................................................................8
2.1 Meter settings........................................................................................................... 9
2.1.1 Setting date and time.....................................................................................................10
2.1.2 Automatic shutdown ......................................................................................................11
2.1.3 Display parameters........................................................................................................13
2.2 Settings of measurements .....................................................................................14
2.2.1 Sub-menu Measurement Settings..................................................................................14
2.2.2 Sub-menu Edit fuses .....................................................................................................16
a. Adding security characteristics.....................................................................................16
b. Adding fuses................................................................................................................20
2.3 Communication......................................................................................................24
2.3.1 USB communication ......................................................................................................24
2.4 Update ................................................................................................................... 24
2.5 Regional settings ...................................................................................................25
2.6 Meter information ...................................................................................................26
3Measurements................................................................................................27
3.1 Diagnostics performed by the meter –limits..........................................................28
3.2 Measurement of alternating voltage and frequency...............................................28
3.3 Checking the correctness of PE (protective earth) connections ............................29
3.4 Measurement of fault loop parameters ..................................................................30
3.4.1 Settings of measurements .............................................................................................30
3.4.2 Measurement of fault loop parameters in the L-N and L-L circuits .................................33
3.4.3 Measurement of fault loop parameters in the L-PE circuit..............................................37
3.4.4 Measurement of fault loop impedance in L-PE circuit protected with a residual current
device (RCD).................................................................................................................40
3.4.5 Prospective short-circuit current ....................................................................................43
3.4.6 Measurement of fault loop impedance in IT networks ....................................................45
3.5 Measurement of resistance-to-earth......................................................................46
3.5.1 Settings of measurements .............................................................................................46
3.5.2 Measurement of resistance to earth using 3P method ...................................................49
3.5.3 Measurement of resistance to earth using 4P method ...................................................53
3.5.4 Measurement of resistance to earth using 3P + clamps method....................................57
3.5.5 Measurement of resistance to earth using double clamp method...................................61
3.6 Measuring soil resistivity........................................................................................64
3.6.1 Settings of measurements .............................................................................................64
3.6.2 Main elements of the screen..........................................................................................66
3.6.3 Soil resistivity measurements ........................................................................................67
3.7 Measurement of RCD parameters ......................................................................... 71
3.7.1 Settings of measurements .............................................................................................71
3.7.2 Measurement of RCD disconnection current..................................................................76
3.7.3 Measurement of RCD disconnection time......................................................................79
3.7.4 Measurements in IT networks........................................................................................82
3.8 Measurement of insulation resistance....................................................................83
3.8.1 Settings of measurements .............................................................................................83
3.8.2 Measurement using probes............................................................................................88
3.8.3 Measurements using UNI-Schuko adapter (WS-03 and WS-04)....................................90
3.8.4 Measurements using AutoISO-1000c ............................................................................93
3.9 Low-voltage measurement of resistance ...............................................................97
3.9.1 Measurement of resistance............................................................................................97

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3.9.2 Measurement of resistance of protective conductors and equipotential bonding with ±200
mA current...................................................................................................................100
3.10 Checking sequence of phases.............................................................................104
3.11 Checking the motor rotation direction ..................................................................106
3.12 Illuminance measurements..................................................................................108
4Recorder .......................................................................................................110
4.1 Functional Description .........................................................................................110
4.2 Main elements of the screen................................................................................112
4.2.1 Top bar........................................................................................................................113
4.2.2 Title bar .......................................................................................................................113
4.2.3 Main window................................................................................................................114
4.2.4 Information bar on the parameters of the current network............................................114
4.2.5 Help.............................................................................................................................114
4.3 Connecting the measuring system.......................................................................115
4.3.1 Measuring arrangements.............................................................................................115
4.3.2 Verifying the connection ..............................................................................................118
4.4 Recording configuration.......................................................................................119
4.4.1 Configuration using the meter......................................................................................119
4.4.2 Recording configuration...............................................................................................120
4.5 Analyzer settings.................................................................................................. 122
4.5.1 Hardware settings –clamps (manner of connecting) ...................................................122
4.5.2 Settings –Regional settings ........................................................................................123
4.5.3 Managers –file manager.............................................................................................124
a. Data viewing..............................................................................................................125
b. Data preview..............................................................................................................126
4.6 LIVE mode of the network....................................................................................127
4.6.1 Transient waveforms of current and voltages (waveforms)..........................................127
4.6.2 Timeplot of effective values .........................................................................................129
4.6.3 "Live" mode - tabular view ...........................................................................................130
4.6.4 Vector diagram of fundamental components (phasor)..................................................132
4.6.5 Harmonics graph/table.................................................................................................133
4.7 Switching the recording on/off.............................................................................. 135
4.7.1 Approximate recording times .......................................................................................135
4.7.2 Recording guidelines ...................................................................................................136
4.8 Recording analysis...............................................................................................136
4.8.1 Recording timeplot.......................................................................................................139
a. Functional Description ...............................................................................................139
b. Selecting parameters for the timeplot.........................................................................140
c. Creating and managing a timeplot..............................................................................142
4.8.2 Harmonics waveform graph.........................................................................................144
4.8.3 Energy costs calculator................................................................................................146
a. Functional Description ...............................................................................................146
b. Settings of the energy cost calculator. .......................................................................147
4.9 Energy loss calculator.......................................................................................... 149
4.9.1 Functional Description.................................................................................................149
4.9.2 Configuration of the loss calculator..............................................................................150
5Memory of the meter....................................................................................152
5.1 Memory of measurements ................................................................................... 152
5.1.1 Memory settings ..........................................................................................................152
5.1.2 Structure of the Memory ..............................................................................................153
a. Fundamentals of navigating the Memory menu..........................................................154
b. Adding a new measurements tree..............................................................................156

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5.1.3 Entering the measurement result.................................................................................161
5.1.4 Viewing saved measurements.....................................................................................162
5.1.5 Searching the meter memory.......................................................................................164
5.2 Recorder memory ................................................................................................165
5.2.1 microSD Memory Card ................................................................................................165
5.2.2 USB external memory (flash drive) ..............................................................................165
5.2.3 Compatibility with Sonel Analysis software..................................................................166
5.2.4 PC connection and data transmission..........................................................................166
6Power supply................................................................................................167
6.1 Monitoring of the battery charge status................................................................ 167
6.2 Replacing rechargeable batteries ........................................................................167
6.3 Charging the rechargeable batteries....................................................................168
6.4 General rules for using Li-Ion rechargeable batteries..........................................169
7Cleaning and maintenance .........................................................................170
8Storage..........................................................................................................170
9Dismantling and utilisation.........................................................................170
10 Technical data..............................................................................................171
10.1 Basic data............................................................................................................171
10.1.1 Measurement of alternating voltages (True RMS)........................................................171
10.1.2 Frequency measurement.............................................................................................171
10.1.3 Measurement of fault loop impedance ZL-PE, ZL-N, ZL-L.................................................171
10.1.4 Measurementof faultloopimpedanceZL-PE[RCD](withouttriggeringof RCD) ...........................172
10.1.5 Measurement of parameters of RCD ...........................................................................173
10.1.6 Measurement of resistance-to-earth RE.......................................................................175
10.1.7 Low-voltage measurement of continuity of circuit and resistance.................................176
10.1.8 Measurement of insulation resistance..........................................................................177
10.1.9 Light measurements ....................................................................................................178
10.1.10 Phase sequence..........................................................................................................179
10.1.11 Motor rotation ..............................................................................................................179
10.2 Recorder data ...................................................................................................... 179
10.2.1 Inputs...........................................................................................................................179
10.2.2 Sampling and RTC ......................................................................................................180
10.2.3 Voltage measurement..................................................................................................180
10.2.4 Measurement of current (True RMS) ...........................................................................181
10.2.5 Frequency measurement.............................................................................................181
10.2.6 Measuring harmonics...................................................................................................182
10.2.7 Unbalance ...................................................................................................................182
10.2.8 Power and energy measurement.................................................................................182
10.2.9 Estimated measurement uncertainty values for power and energy ..............................183
10.3 Other technical data.............................................................................................184
10.4 Additional data .....................................................................................................185
10.4.1 Additional uncertainties according to IEC 61557-2 (RISO).............................................185
10.4.2 Additional uncertainties according to IEC 61557-3 (Z) .................................................185
10.4.3 Additional uncertainties according to IEC 61557-4 (R ±200 mA)..................................185
10.4.4 Additional uncertainties of earth resistance measurement (RE)....................................185
10.4.5 Additional uncertainties according to IEC 61557-6 (RCD)............................................186
10.5 List of reference standards .................................................................................. 187
11 Accessories..................................................................................................187
11.1 Standard accessories ..........................................................................................187

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11.2 Additional accessories .........................................................................................188
11.2.1 C-3 clamps ..................................................................................................................194
11.2.2 Clamps C-4A ...............................................................................................................195
11.2.3 Clamps C-5A ...............................................................................................................196
11.2.4 Clamps C-6A ...............................................................................................................198
11.2.5 Clamps C-7A ...............................................................................................................199
11.2.6 Clamps F-1A, F-2A, F-3A ............................................................................................200
11.2.7 Clamps N-1..................................................................................................................202
12 Positions of the meter’s cover....................................................................203
13 Manufacturer ................................................................................................203
14 Laboratory services.....................................................................................204

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1 Safety
MPI-540 meter is designed for performing check tests of protection against electric shock in AC
mains systems and recording the parameters of electric mains. The meter is used for making meas-
urements and providing results to determine safety of electrical installations. Therefore, in order to
provide conditions for correct operation and accuracy of obtained results, the following recommenda-
tions must be observed:
Before you proceed to operate the meter, acquaint yourself thoroughly with the present manual
and observe the safety regulations and specifications provided by the producer.
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.
MPI-540 meters must be operated only by appropriately qualified personnel with relevant certifi-
cates authorising the personnel to perform works on electric systems. Operating the meter by un-
authorised personnel may result in damage to the device and constitute a source of danger for
the user.
Using this manual does not exclude the need to comply with occupational health and safety regu-
lations 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 fire-
risk/explosive environment, it is necessary to consult it with the person responsible for health and
safety.
It is unacceptable to operate:
a damaged meter which is completely or partially out of order,
a meter with damaged insulation,
a meter stored for an excessive period of time in disadvantageous conditions (e.g. excessive
humidity). If the meter has been transferred from a cool to a warm environment with a high
level of relative humidity, do not start measurements until the meter is warmed up to the am-
bient temperature (approximately 30 minutes).
If the battery is discharged to a level preventing further measurements, the meter displays an ap-
propriate message and then turns off.
Battery spill and damage to the meter may occur if discharged batteries are left in the meter.
Before measurements may commence, make sure the leads are connected to the appropriate
measurement sockets.
Do not operate a meter with an open or incorrectly closed battery (accumulator) compartment or
power it from other sources than those specified in the present manual.
RISO meter inputs are electronically protected against overloads (caused by e.g. connecting the
meter to a live circuit) up to 463 V RMS for 60 seconds.
Repairs may be performed only by an authorised service point.
NOTE!
Only standard and additional accessories for a given device should be used, as listed
in section 11. 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, in case of some of the functions, may slightly differ from the display present-
ed in this operating manual.

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2 Main menu
The main screen is available:
after the meter has been turned on,
at any time after the icon has been selected on the display (does not apply to the re-
corder).
Fig. 2.1 Main elements of the screen
Name of the active menu
The fact of introducing a change that has not been saved yet is indicated by the *symbol in the
screen header.
Time
Date
Main screen
Free space on the memory card
If the card is not in the slot, the icon on the screen is crossed out.
Wireless network signal strength
Battery discharge indicator
Active menu help
Visualisation of connection systems
Explanation of icons
Touching a selected main menu item redirects to the sub-menu. Available options:
Recorder –measurement of electrical parameters of the tested network. The description of
the recording mode is provided in section 4,
Settings –going to the settings of the main functions and parameters of the meter,

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Measurements –Selecting the measurement function. The description of individual func-
tions is provided in section 3,
Memory –viewing and managing the saved measurement results. A detailed description of
the function is provided in section 4.9,
Meter information
2.1 Meter settings
The date, time and display brightness can be set from the Meter settings screen level.
In the main menu select
Settings.
Select Meter settings
Parameters to change
Date and time (section 2.1.1)
Auto off (section 2.1.2)
Display (section 2.1.3)

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2.1.1 Setting date and time
Select Date and time.
Touch the appropriate icon to
modify the selected parameter:
value increase by 1,
value decrease by 1,
touching opens the field for
manual entering of the value (step
).
Delete the existing entry and enter
the required value manually.
Functions of icons
reject the changes and return
to step
accept changes and go to
step

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Description of function icons
return to the previous screen
After touching the icon you
may be prompted to save or
reject changes (figure):
Yes –accept selection,
No –reject changes,
Cancel –cancel the action
saving changes
return to the main menu
2.1.2 Automatic shutdown
Select Auto off.
Select the required option.

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Description of function icons
return to the previous screen
After touching the icon you
may be prompted to save or
reject changes (figure):
Yes –accept selection,
No –reject changes,
Cancel –cancel the action
saving changes
return to the main menu

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2.1.3 Display parameters
Select Display.
Parameters to change
time after which the display
enters the screen-saver mode
–select the required option
display brightness –move
the slider pointer
Description of function icons
return to the previous screen.
After touching the icon you
may be prompted to save or
reject changes:
Yes –accept selection,
No –reject changes,
Cancel –cancel the action
saving changes
return to the main menu

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2.2 Settings of measurements
From the Measurement settings menu it is possible to edit:
network parameters,
security definitions.
2.2.1 Sub-menu Measurement Settings
The option of Measurement settings consists of:
mains rated voltage,
network frequency,
manner of presentation of short-circuit loop result,
type of mains for the tested object,
system of units,
memory settings (auto-incrementing memory cells).
Before the measurements select the type of mains from which the tested object is powered.
Then select the mains rated voltage Un(110/190 V, 115/200 V, 127/220 V, 220/380 V, 230/400 V or
240/415 V). This voltage value is used for calculating the values of prospective short-circuit current.
Determination of network frequency that is the source of potential interferences is necessary in
order to select a proper measuring signal frequency in resistance-to-earth measurements. This selec-
tion ensures optimum interference filtering. The meter is designed for filtration of interferences gener-
ated by 50 Hz and 60 Hz networks.
Setting Autoincrementing as active (  ) causes each saved measurement (section

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5.1.3) to be placed in an automatically created new measurement point (section b step ).
Expand the selection list us-
ing the icon.
Select the required parame-
ter value.
Selection and modification options
Unvoltage
110/190 V
115/200 V
127/220 V
220/380 V
230/400 V
240/415 V
Frequency fn
50 Hz
60 Hz
Fault loop measurement
form
Ik –prospective short-
circuit current
Zs –fault loop imped-
ance
System type
TN/TT
IT
System of units,
metric
imperial
Autoincrementing
enabled
disabled
Description of function icons
return to the previous
screen. After touching the
icon you may be prompted
to save or reject changes:
Yes –accept selection,
No –reject changes,
Cancel –cancel the action
saving changes
returning to the main
menu

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2.2.2 Sub-menu Edit fuses
On the Fuse base screen the following parameters of circuit breakers can be defined and edited:
manufacturer,
model (type) of fuse,
characteristic of fuse.
a. Adding security characteristics
Select the icon.
A menu will appear for adding
security time-current character-
istics.

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Available options
adding characteristics for the
selected security rated cur-
rent.
removing characteristics for
the selected security rated
current.
pasting the set value for rec-
ords in the whole row or ta-
ble.
Description of function icons
inactive characteristic
active characteristic
adding a new characteristic
editing the name of the active
characteristic
removing the active character-
istic
returning to the previous
screen
going to the main menu
To create a new characteristic:
select the icon,
touch the name selection field.
Enter the name from the touch
keypad (holding certain buttons for
a longer time triggers Polish char-
acters).
Functions of icons
rejecting changes and return-
ing to step
accepting changes and going
to step

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Description of function icons
Ok –accept the name
Cancel –cancel the action
Activate the created characteris-
tic .
Add rated fuse current using
icon .
Editing security data proceed as
in steps .
To activate a row of data, select
any item in the row.
Icons will be activat-
ed.