METREL Photovoltaic MI 3088 User manual

Demonstration board
Photovoltaic
MI 3088
User Manual
Version 1.0.5, Code No. 20 752 118

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Distributor:
Manufacturer:
Metrel d.d.
Ljubljanska cesta 77
SI-1354 Horjul
Slovenia
https://www.metrel.si
[email protected]
DATA BACKUP AND LOSS:
It is the user’s responsibility to ensure the integrity and security of the data carrier (SD card) and to
regularly backup and validate the integrity of backups of the data. METREL HAS NO OBLIGATION
OR LIABILITY FOR ANY LOSS, ALTERATION, DESTRUCTION, DAMAGE, CORRUPTION OR
RECOVERY OF USER DATA, REGARDLESS OF WHERE THE DATA IS STORED.
Mark on your equipment certifies that it meets requirements of all subjected EU
regulations.
Hereby, Metrel d.d. declares that the MI 3088 is in compliance with subjected EU
directive. The full text of the EU declaration of conformity is available at the
following internet address https://www.metrel.si/DoC.
© 2022 METREL
The trade names Metrel®, Smartec®, Eurotest®, Auto Sequence®are trademarks registered in Europe and other
countries.
No part of this publication may be reproduced or utilized in any form or by any means without
permission in writing from METREL.

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1Introduction................................................................................................................... 4
1.1 General Description................................................................................................ 4
1.2 General warnings.................................................................................................... 4
1.3 Applied standards................................................................................................... 5
1.4 Meaning of warning/information symbols on front panel......................................... 6
1.5 List of measurements that can be demonstrated.................................................... 6
2Front panel description................................................................................................ 7
3Measurements .............................................................................................................. 8
3.1 Continuity of earthing system.................................................................................. 8
3.2 PV array insulation resistance................................................................................. 9
3.3 Measurement of irradiation and temperature.........................................................10
3.4 Uoc, Isc test and I/V characteristic measurement..................................................11
3.5 Automatic test sequence........................................................................................12
3.6 PV panel test..........................................................................................................13
3.7 Measurement of inverter input –DC side...............................................................14
3.8 Measurement of inverter output –AC side.............................................................15
3.9 Inverter efficiency...................................................................................................16
4Technical data..............................................................................................................17
5Maintenance.................................................................................................................18
5.1 Cleaning.................................................................................................................18
5.2 Service...................................................................................................................18
6Standard set.................................................................................................................19

MI 3088 PV demonstration board Introduction
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1 Introduction
1.1 General Description
PV demonstration board simulates photovoltaic electricity generation system. The PV
demonstration board is preferably intended for sales persons to demonstrate operation
and application of PV test equipment. However, it could also be applied as training and
educational tool. Various tests supported by different PV test instruments can be
presented. It is placed into a practical plastic carrying case.
Demonstration/simulation possibilities:
- PV array d.c. output,
- Measurement of d.c. current,
- Inverter operation with measurement of a.c. output current and voltage,
- Pyranometer simulation,
- Temperature simulation
- Insulation resistance of PV array,
- Continuity of protective earthing.
Demonstration board is designed according to European safety standard EN 61010-1.
1.2 General warnings
If the equipment is not used in a manner specified by manufacturer, the
protection provided by equipment may be impaired.
Use the PV demonstration board on well-grounded supply systems only.
Only qualified personnel, familiar with the board and the measuring instrument
may use the PV demonstration board!
Application of the PV demonstration board in a way not specified in this User
Manual could damage the board.
Do not use PV demonstration board in case of any damage noticed!
Only an authorized person may carry out servicing of PV demonstration board!

MI 3088 PV demonstration board Introduction
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1.3 Applied standards
The PV demonstration board MI 3088 is manufactured and tested in accordance with the
following regulations:
Electromagnetic compatibility (EMC)
EN 61326
Electrical equipment for measurement, control and laboratory
use –EMC requirements
Class B (Hand-held equipment used in controlled EM environments)
Safety (LVD)
EN 61010-1
Safety requirements for electrical equipment for measurement, control
and laboratory use –Part 1: General requirements
Functionality
Reference standard for photovoltaic systems
EN 62446
Grid connected photovoltaic systems –Minimum requirements for
system documentation, commissioning tests and inspection
Note about EN and IEC standards:
Text of this manual contains references to European standards. All standards of EN
6XXXX (e.g. EN 61010) series are equivalent to IEC standards with the same
number (e.g. IEC 61010) and differ only in amended parts required by European
harmonization procedure.

MI 3088 PV demonstration board Introduction
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1.4 Meaning of warning/information symbols on front panel
Indication of power supply.
Take care that demonstration board is
connected only to mains voltage
according to the description under the
mains socket! In the opposite case the
board can be damaged!
The product must undergo selective
disposal for the recycling of the electric
and electronic material in compliance
with directive WEEE 2002/96/EC.
The CE marking guarantees conformity
with European directives and with
regulations covering EMC.
1.5 List of measurements that can be demonstrated
-PV string insulation resistance,
-Bonding resistance of PV panel metallic support to protective earthing,
-PV string U/I characteristics,
-PV string d.c. current,
-PV string d.c. power,
-Irradiance,
-Temperature on PV panels,
-Inverter output a.c. current,
-Inverter output a.c. voltage,
-Inverter output a.c. power,
-Inverter and PV system efficiency.

MI 3088 PV demonstration board Front panel description
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2 Front panel description
1
Front panel
Presents typical components required in PV power utility.
2
Case
Plastic case of PV demonstration board with handle.
3
PE connection
For testing purposes only!
4
Inverter d.c. input voltage
Sockets for measurement of inverter d.c. input voltage (from PV
array).
5
Inverter d.c. input current
For applying d.c. current clamps.
6
Pyranomter output
Output for demonstration of irradiance measurement.
7
PV array output
Output representing PV array I/U characteristics.
8
Connection to metallic
construction
Intended for continuity measurement of grounding system.
9
Case cover with label
Label representing PV panel.
10
Temperature probe output
Output representing PV array temperature.
11
Inverter a.c. output voltage
Sockets for measurement of inverter output a.c. voltage.
12
Inverter a.c. output current
For applying a.c. current clamps.
13
Supply indicator
Indicates proper supply of the PV demonstration board.
14
Supply entry
IEC appliance coupler for supplying the PV demonstration board,
universal power supply input 115 V / 230 V
15
Warning symbol
To pay attention for right connection to proper mains power supply.
Warning: All outputs are intended for demonstration of possible PV testing only!

MI 3088 PV demonstration board Measurements
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3 Measurements
3.1 Continuity of earthing system
Measurement location
Nominal value
Connection to metallic construction –PE connection
0.1 
Applied instruments and functions
Instruments
Functions
MI 3108
R LOWΩ; 200 mA resistance measurement (INSTALLATION menu)
MI 3109
R LOWΩ; 200 mA resistance measurement (SOLAR menu)

MI 3088 PV demonstration board Measurements
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3.2 PV array insulation resistance
Measurement location
Nominal value
PE connection –DC switch board + socket
96 M
PE connection –DC switch board - socket
92 M
Applied instruments and functions
Instruments
Functions
MI 3108, MI 3109
RISO +; Insulation resistance measurement between panel / array /
string positive and earth
RISO -; Insulation resistance measurement between panel / array /
string negative and earth

MI 3088 PV demonstration board Measurements
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3.3 Measurement of irradiation and temperature
Pyranometer
Measurement location
Nominal value
Pyranometer sockets
780 W/m2
Temperature
Measurement location
Nominal value
Temperature probe connector
25 °C *
* Depends on real ambient temperature and internal heating.
Applied instruments and functions
Instruments
Functions
MI 3108, MI 3109
ENV.: MEAS;Measurement of environmental parameters
(Irradiance, temperature)

MI 3088 PV demonstration board Measurements
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3.4 Uoc, Isc test and I/V characteristic measurement
Measurement location
Measured
value
STC value
DC switch board + socket –DC switch board - socket
Isc
48.2
Isc
49
Uoc
3.1
Uoc
4.1
Umpp
44.8V
Umpp
45.2 V
Impp
2.4 A
Impp
3.1 A
Pmpp
107 W
Pmpp
140 W
Applied instruments and functions
Instruments
Functions
MI 3108, MI 3109
Uoc/Isc; Open circuit voltage and short circuit current measurement,
I/V; current/voltage and current/power characteristics measurement
Note:
STC values are displayed if irradiance and temperature are measured before.
See chapter 3.3 Measurement of irradiation and temperature.

MI 3088 PV demonstration board Measurements
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3.5 Automatic test sequence
Measurement location
Measured
value
STC value
PE connection –DC switch board + socket –DC switch
board - socket
96 M
92 M
48.2
49 V
3.1
4.1 A
Applied instruments and functions
Instruments
Functions
MI 3109
AUTOTEST; Automatic measurement of insulation resistance and
Uoc/Isc of PV panel / array / string.
Notes:
Applicable only on MI 3109.
STC values are displayed if irradiance and temperature are measured before.
See chapter 3.3 Measurement of irradiation and temperature.

MI 3088 PV demonstration board Measurements
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3.6 PV panel test
Measurement location
Measured
value
STC value
DC switch board + socket –DC switch board - socket
Umpp
48.2 V
Umpp
48.5 V
Impp
3.1 A
Impp
4.1 A
Pmpp
151 W
Pmpp
200 W
Applied instruments and functions
Instruments
Functions
MI 3108, MI 3109
PANEL;Current, voltage inverter working point
Note:
STC values are displayed if irradiance and temperature are measured before.
See chapter 3.3 Measurement of irradiation and temperature.

MI 3088 PV demonstration board Measurements
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3.7 Measurement of inverter input –DC side
Measurement location
Measured value
Inverter input + socket –Inverter input –socket
Embraced red current loop using A 1391 current clamp
UDC
48.2 V
IDC
3.1 A
PDC
151 W
Applied instruments and functions
Instruments
Functions
MI 3108, MI 3109
INVERTER: DC;Measurements at DC side of inverter

MI 3088 PV demonstration board Measurements
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3.8 Measurement of inverter output –AC side
Measurement location
Nominal value
AC switch board L –AC switch board N
Embraced black current loop using A 1391 current clamp
UAC
227 V
IAC
0.60 A
PAC
135 W
Applied instruments and functions
Instruments
Functions
MI 3108, MI 3109
INVERTER: AC;Measurements at AC side of inverter

MI 3088 PV demonstration board Measurements
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3.9 Inverter efficiency
Measurement location
Nominal value
Inverter + socket –Inverter - socket
AC switch board L –AC switch board N
Embraced red and black current loops using A 1391 current clamps
UDC
48.2 V
IDC
3.1 A
PDC
151 W
UAC
227 V
IAC
0.60 A
PAC
135 W
η
90 %
Applied instruments and functions
Instruments
Functions
MI 3108, MI 3109
INVERTER: AC/DC;Measurement of efficiency of inverter

MI 3088 PV demonstration board Technical data
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4 Technical data
Nominal mains voltage...............................115 V/ 230 V, 50 Hz / 60 Hz
Power consumption ...................................200 W
Mains cord………………………………….. single-phase
Dimensions (width × length × height).........450 × 330 × 110 mm
Weight........................................................4.47 kg
Protection class .........................................I (protective earth conductor)
Over voltage category................................CAT II 300 V
Pollution degree.........................................2
Reference conditions
Reference temperature range....................10 C 30 C
Reference humidity range..........................40 %RH 70 %RH
Operation conditions
Working temperature range…………………0 C 40 C
Maximum relative humidity ........................95 %RH (0 C 40 C), non-condensing
Storage conditions
Temperature range………………..…………-10 C 70 C
Maximum relative humidity ........................90 %RH (-10 C 40 C),
80 %RH (40 C 70 C),

MI 3088 PV demonstration board Maintenance
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5 Maintenance
5.1 Cleaning
Use a soft cloth slightly moistened with soapy water or alcohol to clean the surface of the
board and then leave the board to dry totally before use.
Do not use liquids based on petrol!
Do not spill liquids over the board!
5.2 Service
In case of unusual response of Demonstration board or if there is any damage noticed, the
product has to be taken to an authorized service. Consult the producer or your dealer for
further information.
The product has no internal user serviceable parts (fuses, etc).
Producer's address:
METREL d.d.
Ljubljanska 77
1354 Horjul
Slovenia
Tel.: [phone]
Fax.: [phone] or [phone]

MI 3088 PV demonstration board Standard set
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6 Standard set
Upon receipt of Demonstration board it is advisable to check the content of the delivery.
The following items have to be included:
Demonstration board
Mains cable
PS2 male / male adapter
Test lead 1.5 m, black
Test lead 1.5 m, red
User manual

MI 3088 PV demonstration board Standard set
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