EazyPV - Solar tester Manual
Contents
1. EazyPV Solar tester Manual Mors Smitt B V Utrecht Copyright 2012 All rights reserved Nothing from this edition may be multiplied or made public in any form or manner either electronically mechanically by photocopying recording or in any manner without prior written consent from Mors Smitt B V Mors Smitt B V reserves the right to change parts at any given moment without prior or direct notification to the client The contents of this user manual may also be changed without prior warning No part of this publication may be seen as part of a contract for the equipment unless specifically referenced and included in such contract This user manual is compiled with all possible care but Mors Smitt B V cannot accept any responsibility for possible errors in this user manual or any consequences resulting from that vessassa Ww yyy nieaf smitt com NIEAF Mors Smitt 5 SMITT A Wabtec Company Preface This manual describes the EazyPV The information in this manual is important for pro per and safe functioning of the equipment If you are not familiar with operating this equipment read this user manual from the beginning to the end thoroughly After that you can use this manual for reference You can find the information rapidly using the table of contents In this user manual the following marking conventions are used to focus attention on certain subjects or actions Tip Gives you suggestions2. www nieaf smitt com NIEAF Mors Smitt SMITT A Wabtec Company 4 Unit description 4 1 Operating means 4 1 1 Frontpanel LCD display Rpe test key Auto test sequence key Test lead resistance null key Insulation test voltage select key Memory recall key Memory store key USB connection 9 ve PV test lead input red 10 ve PV test lead input black 11 ve 4mm test lead input black 12 ve 4mm test lead input red a ea eS SS www n j ea f s m itt co m Nieaf Smitt is a brand name o a ii oO Mors Smitt A Wabtec Company 4 1 2 Display ano ar e See O O Mors Smitt 12 d b a AORE NENV i DDR 250V 500V 1000V oo a oo 66 0 D As XR 26 DMO Error eean e GUbIe5 m n O p Rpe voltage polarity For AC voltages alternating and is shown Current clamp measurement active Rpe Null offset indicates that test lead resistance offset is active Caution hot surface If this icon appears the EazyPV must be disconnected immediately from the PV system until the icon is no longer shown on the LCD Solar module polarity indicator indicates the polarity of the DC voltage applied to the PV test terminals e g correct or reversed Caution hazardous voltage detected Rpe test lock active when continuous Rpe measurement has been enabled Caution refer to operating instruction When this icon is active the opera
3. 16 E sales nieaf smitt nl l www nieaf smitt com c Copyright 2012 A Vand lt Solar yS Helpdesk E helpdesk nieaf smitt nl www nieaf smitt nl support Edition V1 Art no 561144201 MAN EazyPV EN V1 0 Date 15 10 2012 Nieaf Smitt is a brand name of Mors Smitt O Mors Smitt A Wabtec Company All rights reserved Nothing from this edition may be multiplied or made public in any form or manner either electronically mechanically by photocopying recording or in any manner without prior written consent from Mors Smitt B V This also applies to accompanying drawings and diagrams Due to a policy of continuous development Mors Smitt B V reserves the right to alter the equipment specification and description outlined in this datasheet without prior notice and no part of this publication shall be deemed to be part of any contract for the equipment unless specifically referred to as an inclusion within such contract
4. Insulation resistance Test voltage specification Test voltage 1 mA Test current short circuit Display range Measuring range EN 61557 2 Resolution Accuracy No of repeat tests as per IEC61557 2 Rpe voltage measurement 4 mm terminals Display range Voltage measuring range Resolution Accuracy Operating current via AC DC current clamp Display range Current measuring range Resolution Accuracy Power measurement DC only Display range Current measuring range Resolution Accuracy 0 0 VDC 1000 VDC 5 0 VDC 1000 VDC 0 1 VDC 0 5 2 digits 0 00 ADC 9 99 ADC 0 50 ADC 9 99 ADC 0 01 ADC 1 2 digits gt 4V gt 200 mA 0 00 02 1990 0 05 Q 199 0 0 01 O maximum 2 2 digits Approx 4000 0 20 open circuit gt 1 mA into UN x 1000 0 V lt 2 mA 0 05 MQ 199 MO 0 20 MQ 199 MO 0 01 MQ maximum 0 05 MQ 100 MO 5 5 digits 101 MQ 199 MO 10 5 digits Approx 3000 30 V 440 V 30 V 440 VDC 30 V 440 VAC 50 60 Hz 1V 5 2 digits 0 1 A 40 0 A 0 1 A 40 0 ADC 0 1 A 40 0 AAC 50 60Hz 0 1 A 5 2 digits 0 0 kW 40 0 kW 0 1 kW 40 0 kW 0 1 kW 5 2 digit NIEAF SMITT Nieaf Smitt is a brand name of Mors Smitt oO Mors Smitt A Wabtec Company www nieaf smitt com 27 Mors Smitt B V Vrieslantlaan 6 3526 AA Utrecht Postbus 7023 3502 KA Utrecht The Netherlands T 31 0 30 288 13 11 31 0 30 289 88
5. a short circuit across the PV string The insulation test voltage is then applied between the red 4 mm test lead and the two PV testterminals Tip If the DC voltage polarity is incorrect or the voltage is lt 5 V or gt 1000 V the Autotest will be inhibited until the problem is corrected Nieaf Smitt is a brand name of Mors Smitt NIEAF www nieaf smitt com D Mors Smitt 1 9 A Wabtec Company 5 4 Operating current The EazyPV can be used to measure the DC operating current of a solar PV installation as shown 1 Disconnect all cables from the PV test inputs connection 8 amp 9 in figure 2 2 Connect the current clamp to the red black 4 mm probe inputs 3 Move the current clamp switch to the 40 A position 4 Zero current clamp according the manual of the clamp 5 Place the clamp around the DC cable of the solar installation 6 Press the Viso button until the clamp icon appears on the LCD 7 The measured current is shown on the LCD next to the clamp icon versmes wyywnieaf smitt com NIEAF Mors Smitt 5 SMITT A Wabtec Company 5 5 Operating power The EazyPV can be used to measure the DC operating power of a solar PV installation as shown EazyPV A Solar gt y Disconnect all cables from the PV test inputs 8 amp 9 in figure 2 Connect the current clamp to the red black 4 mm probe inputs Move the current clamp switch to the 40 A position Zero current clamp according the m
6. and advice to perform certain tasks easier or handier Attention A remark with additional information draws your attention to possible problems Caution The EazyPV may be damaged if you do not carefully execute the procedures Caution The EazyPV may be damaged if you do not carefully execute the procedures Terms abbreviations and indications In this manual the following abbreviations are used e User manual or manual terms for the description of this document e Device measuring device tester are used for the EazyPV e Texts on the display are placed between quotation marks e g VDC e Buttons and keys that need to be operated are displayed with the image of the key Nieaf Smitt is a brand name of Mors Smitt Mors Smitt A Wabtec Company NIEAF www nieaf smitt com SMITT 3 oO Warning pictograms on the tester On the tester a number of pictograms are attached meant to warn the user for remai ning risks that may be presented when using the instrument despite its safe design Pictogram Description Location on tester Warning At the backside of the General sign for danger Read the in tester on the instruction structions carefully before use label Warning At the backside of the Danger for direct contact with live tester parts CE mark The CE mark is located on Declares the conformity with the the backside of the tester European directives Tabel 1 Pi
7. suitable earth or to the array frame 3 Where the array frame is not bonded to earth a commissioning engineer may choose to do two tests a Between array cables and earth b Between array cables and frame 4 The EazyPV will automatically detect any DC voltage connected to the PV test socket inputs 8 and 9 and display the measured voltage 5 If the PV voltage polarity is reversed the polarity indicator will flash a cross next to the voltage icon 6 If the incoming voltage is gt 30 v then the shock hazard icon will flash 7 Use the Viso button ve to select either the 250 V 500 V or 1000 V insulation test voltage vessassa yyy nieaf smitt com NIEAF Mors Smitt SMITT A Wabtec Company 8 Press the auto button and the EazyPV will automatically perform the following tests e Open circuit voltage Short circuit current e Insulation resistance 9 The measurement results will remain on the LCD for 20 seconds or until a key is pressed 10 A tick or cross will be displayed next to the insulation resistance measurement indicating whether the result is above or below the threshold values shown Table 1 Attention Always ensure that the circuit under test is electrically isolated from the mains supply Tip Due to the high input impedance of the red 4 mm test terminal voltage caused by leakage currents may be detected on the prior to Starting a test Tip During the insulation test the EazyPV applies
8. Rpe key until the lock icon appears on the LCD The resistance between the test probes is displayed Press the Rpe key to terminate the continuous measurement mode ee NIEAF www nieaf smitt com SMITT 15 Nieaf Smitt is a brand name of Mors Smitt oO Mors Smitt A Wabtec Company Attention Always ensure the circuit under test is electrically isolated Attention If the testprobes are connected to a voltage gt 5 V the measured voltage will be displayed on the LCD If the voltage exceeds 30 V the RPe measurement function is inhibited vessassa Wyyy nieaf smitt com NIEAF Mors Smitt SMITT A Wabtec Company 5 2 Voltage measurement A lt Solar gt ys EazyPV Connect the red and black test probes to a voltage source The EazyPV will automatically measure the voltage between the probes The polarity of the voltage is shown using the icon next to the Rpe icon if the measured voltage is AC alternating and is shown Tip When the measured voltage exceeds the 30 V limit the voltage icon A is shown Nieaf Smitt is a brand name of Mors Smitt ae www nieaf smitt com D Mors Smitt 1 7 A Wabtec Company 5 3 Auto sequence measurement EazyPV 1 Connect the EazyPV to the PV module as shown using the supplied test lead adaptors 2 The red test probe should be connected to earth Where the structure frame is bonded to earth the earth connection maybe to any
9. anual of the clamp Place the clamp around the DC cable of the solar installation Press the Viso button Veo until the clamp icon appears on the LCD The measured DC current is shown on the LCD next to the clamp icon Connect the PV voltage to the PV inputs T or Y test adaptors are required if the DC power is to be measured whilst the PV system is operational The DC voltage current and power will be displayed oo aS a Tip The autobutton is disabled whilst the DC power measurement is in use Under no circumstances should and Auto test sequence be attempted whilst the EazyPV is connected to the inverter DC inputs as this may result in damage to the instrument www n j ea f s m itt co m Nieaf Smitt is a brand name o ae 3j oO Mors Smitt A Wabtec Company Nieaf Smitt is a brand name of Mors Smitt A Wabtec Company 6 Other functionalities 6 1 Results 6 1 1 Memory store The EazyPV can store up to 200 complete sets of measurements Press memory store button to store all measured values on the display If there is sufficient memory space to store a set of readings then the store icon will appear and the reading will be stored in the next available memory location If there is insufficient memory space then the buzzer will sound If there are no valid readings on the display then nothing will be stored 6 1 2 Memory recall Each press of the recall button will increment the user memory location ind
10. cing the fuse 1 Power the unit off 2 Disconnect all the test leads from the unit 3 Position the EazyPV face down and release the captive screw in the battery compartment cover 4 Remove the battery compartment cover 5 Lift one end of the fuse out of the fuse holder with the help of a flat bladed screwdriver 6 Lift the defective fuse completely out of the fuse holder and insert a new fuse as described and specified by the text on the battery compartment cover 7 Relocate the battery cover over the battery compartment and fasten in position with the battery cover captive screw Warning for danger Before opening the EazyPV ensure that it is disconnected from all voltage Electric shock danger Tip All replacement fuse types are specified for ratings and size on the battery compartment cover on the back of the EazyPV Nieaf Smitt is a brand name of Mors Smitt NIEAF www nieaf smitt com D Mors Smitt 25 A Wabtec Company Appendix1 Declaration of conformity Declariation fo conformity of the product with relevant directives and standards EU DECLARATION OF CONFORMITY Product EazyPV Identification of the tester Brand name Nieaf Smitt Model EazyPV Mors Smitt declares that the EazyPV operates within specification when used under the conditions in the following directives Directive 2004 108 EG Directive 2006 95 EC and the following standards IEC 61010 1 2010 Safety requirements for electrical equipment fo
11. ctograms on the tester Disposal removal of device This device has been designed and produced with high quality material and components that can be recycled If this symbol is applied on a product it is complied with the European Directive 2002 96 EC Inform how collecting of products with this logo is regulated in your area Remove this device only following these regulations and not with the general waste Correct disposal will contribute to a better environment Warranty Mors Smitt B V guaranties the tester for a period of 24 months The period of warranty will be effective at the day of delivery The warranty clauses and the stipulations regarding liability in terms of delivery are registered in the conditions of FME sesse wyywnieaf smitt com NIEAF Mors Smitt SMITT A Wabtec Company Contents Page 1 General safety regulations 6 2 General 8 2 1 Intended use 8 2 2 Target group 8 2 3 Environmental conditions 9 3 Composition of the device 10 4 Using the EazyPV 11 4 1 Operating means 11 4 1 1 Frontpanel 11 4 1 2 Display 12 4 2 Start up 13 4 3 Battery condition 13 5 Tests 14 5 1 Protective earth resistance measurement Rpe 14 5 1 1 Test lead resistance null 14 5 1 2 Resistance measurement ies 5 2 Voltage measurement 17 5 3 Automatische test uitvoeren 18 5 4 AC amp DC current measurement 20 5 5 DC power measurement 21 6 Other functionalities 22 6 1 Results 22 6 1 1 Memory store 22 6 1 2 Mem
12. e unit to an authorised service agent Return the unit to an authorised service agent Return the unit to an authorised service agent Nieaf Smitt is a brand name of Mors Smitt NIEAF www nieaf smitt com D Mors Smitt 23 A Wabtec Company 7 Maintenance 7 1 Calibration and repair Caution Repairs may only be executed by Mors Smitt B V Caution Don t replace parts except the batteries and fuse yourself Attention It is advisable to calibrate the tester periodically For reparation and calibration contact Mors Smitt B V Tel 31 0 30 288 13 11 or www nieaf smitt com 7 2 Cleaning the EazyPV Use a soft cloth soaked in water and let the tester dry before usage after cleaning Warning for danger Always ensure that the circuit under test is electrically isolated from the mains supply versmes wyyw nieaf smitt com NIEAF Mors Smitt 5 SMITT A Wabtec Company 7 3 Replacing the batteries 1 Power the unit off 2 Disconnect all the test leads from the unit 3 Position the EazyPV face down and release the captive screw in the battery compartment cover 4 Remove the battery compartment cover 5 Replace batteries from the compartment 6 Relocate the battery cover over the battery compartment and fasten in position with the battery cover captive screw Warning for danger Before opening the EazyPV ensure that it is disconnected from all voltage Electric shock danger 7 4 Repla
13. eaf smi se D Mors Smitt A Wabtec Company EazyPV tests Protective earth resistance measurement Rpe Test lead resistance null The EazyPV can automatically compensate for the resistance of the test leads as follows 1 Hold the tips of the test probes firmly together as shown to ensure a good electrical connection 2 Press and hold the Null key 3 The measured resistance of the test leads is shown in the primary display until a beep is heard 4 The Rpe display will now 0 00 and the Null icon is illuminated EazyPV Attention For ease of use the EazyPV will store the lead compensation when switched off and recall this value when next switched on The stored value is only applicable to the test leads used when the compensation measurement was made If the test leads are replaced the Rpe null function should be repeated using the replacement test leads Attention A maximum test lead resistance of 10 Q ohms can be taken into account If the test lead resistance is greater than 10 an error beep will indicate that the lead zero function has failed www nieaf smitt com NIEAF O Mors Smitt 14 SMITT 5 1 2 Resistance measurement To make a single measurement 1 Connect the red and black test leads as shown 2 Press the Rpe key 3 The resistance between the test probes is displayed To make a continuous measurement Connect the red and black test leads as shown Press and hold the
14. ess the NULL key whilst switching on the EazyPV 2 onthe first line the messag OFF will show in the display on the second line the turn off time 3 Hold the NULL key and press the viso key to adjust the turn off time 4 The maximum increment time is 10 minutes Tip When displaying DC operating power the auto shutdown function is deactivated whilst DC voltage or current are detected This will allow extended time for monitoring DC power 6 3 Communication with IRM100 Irradiancemeter To link the measured values of the IRM100 the EazyPV can communicate with the IRM100 via a wireless connection Check the manual of the IRM100 for extra information about wireless communication between the EazyPV and IRM100 6 4 Error Messages Under certain conditions the EazyPV may indicate an error message m 5 7 The internal fuse has blown Refer to section 7 4 in the operating instructions for details on how to replace the fuse The electronics within the EazyPV have reached the maximum safe tempera L ture This can occur after repeated short circuit current measurements at high current levels Allow the unit to cool down before further use The DC short circuit current has exceeded the maximum rated value of 10 A H i 5 a The measurement sequence has been aborted The EazyPV is not correctly calibrated Return the unit to an authorised service agent x m Return the unit to an authorised service agent C L F l E Return th
15. fied persons are persons who e have got a certain level of technical knowledge gained by education training e have got certain skills required to operate the tester e are familiar with the applied technology in the instrument and are aware of the possible dangers and risks www nieaf smitt com NIEAF SMITT Environmental conditions The EazyPV has been designed to perform tests and measurements in a dry environment Maximum barometric elevation for making measurements is 2000 m Overvoltage category IEC 60664 IEC 61010 300 V Category III red and black 4 mm terminals only Pollution degree 2 according IEC 61010 1 Protective system IP51 according IEC 60529 Electromagnetic compatibility EMC interference immunity and emitted interference conforming IEC 61326 1 Operating temperature range of 0 C 40 C without moisture condensation Storage temperature range 25 C 65 C relative humidity up to 90 the batteries should be taken out Ae isin D Mors Smitt A Wabtec Company Nieaf Smitt is a brand name of Mors Smitt 3 Composition of the device The following items are included 1 EazyPV 2 2xtestleads 1 2 m red black 3 2x MC4 cables 4 2x Sunclix cables 5 Quickstart manual 6 6x MN1500 AA 1 5 V batteries 7 Carrying bag 8 Support CD software full manual 9 USB cable A microB 10 2x alligatorclamps For more specifications and extra accessories check appendix 2 and www nieaf smitt com
16. his rating The DC supply must be isolated from earth during testing Attention High voltages are present at the probe tips of the EazyPV during insulation resistance measurement Always hold test probes behind the hand guards Attention Check the EazyPV and all associated cables and leads before operating the equipment Do not use if there are signs of damage Only use the test leads supplied with the EazyPV Attention Do not touch any exposed metal parts of the PV installation during testing versmes wyyw nieaf smitt com NIEAF Mors Smitt SMITT A Wabtec Company Attention Always ensure that the circuit under test is electrically isolated from the mains supply before attempting an earth resistance measurement Attention Do not leave the EazyPV permanently connected to a PV installation Always disconnect all test leads immediately after use Warning danger It is not allowed to remove to skirt or to tide over the enclosure or safeties of the tester during operation Warning danger It is forbidden to place and or to use the EazyPV in a room where there is a risk of explosion Attention If the tester is used by a third party you being the owner are responsible unless otherwise specified Attention Mors Smitt B V reserves the right to without prior notice update the software in the EazyPV which is returned for either reparation or other reasons Warning danger Repair can only be done b
17. icator and display the measured values stored in that memory location The location number is shown on the bottom of the LCD display After the first press of recall the store button QO can be used to decrement the user memory location indicator to recall previous memory location Press and hold the recall button to download data to a PC via the USB port 6 1 3 Download results Connect the tester to the PC using the USB connection in order to download the measuring results via the PV Link software Start the download on the PV link software and press and hold the recall button until the download starts 5 variation warning If the recall data has Voc or Isc reading then the average of all the stored readings is cal culated If the current recalled reading is more than 5 different from the average then the 5 warning icon will flash Average value Keep pressing the until the location number is 0 The display now shows the average Voc and Isc of all stored results 6 1 4 Delete results Press the store m and recall buttons together to clear all the user memory locations Tip When clearing the memory of the EazyPV all results will be deleted from the internal memory www nieaf smitt com NIEAF Mors Smitt 5 SMITT 6 2 Auto shutdown After 1 minute of being idle the EazyPV will turn itself off in order to conserve battery power This auto shutdown period can be extended as follows 1 Pr
18. ory recall 22 6 1 3 Results downloading 22 6 1 4 Memory clear 22 6 2 Auto power off 23 6 3 Communicatiion with IRM100 23 6 4 Error messages 23 7 Maintenance 24 7 1 Calibration and repair 24 7 2 Cleaning the EazyPV 24 7 3 Replacing batteries 25 7 4 Replacing fuses 25 Appendices 1 Declaration of conformity 26 2 Electrical specifications 27 www n j ea f s m itt co m Nieaf Smitt is a brand name ace a g oO Mors Smitt A Wabtec Company 1 General safety regulations Warning danger Read before you perform any action in connection with the tester this user Manual carefully Mors Smitt B V is not liable for injuries financial damage and excessive wear resulting from incorrectly performed maintenance incorrect use of or modifications to the tester Attention Under certain circumstances in almost every electronic memory data can be lost or changed Therefore Mors Smitt B V accepts no financial responsibility for losses or claims by lost or otherwise unusable information resulting from abuse misuse failure neglect of the user manual and procedures or other related causes Attention The EazyPV red and black 4 mm test terminals may be used to make measurements on circuits rated up to CAT III 300 VAC DC with reference to earth Do not connect the EazyPV to voltages which may exceed this rating Attention The PV testterminals maximum rating 1000 VDC open circuit voltage 10 A short circuit current Do not exceed t
19. r measurement control and laboratory use Part 1 General requirements IEC 61010 2 030 2010 Safety requirements for electrical equipment for measurement control and laboratory use Part 2 030 Particular requirements for testing and measuring circuits IEC 61010 031 2002 A1 2008 Safety requirements for electrical equipment for measurement control and laboratory use Safety requirements for hand held probe assemblies for electrical measurement and test IEC 62446 2010 Grid connected PV systems Minimum requirements for system documentation commissioning tests and inspection IEC 61557 1 2 4 2007 amp 10 2001 Electrical safety in low voltage distribution systems up to 1000 VAC and 1500 VDC Equipment for testing measuring or monitoring of protective measures IEC 61326 2006 Electircal equipment for measurement control and laboratory user EMC requirements All tests are performed in a traceable setup Date Autorised person vessassa Wyyy nieaf smitt com NIEAF Mors Smitt 5 SMITT A Wabtec Company Appendix 2 Electrical specifications Open circuit voltage measurement PV terminals Display range Measuring range Resolution Accuracy Short circuit current measurement Display range Measuring range Resolution Accuracy Earth continuity Test voltage open circuit Test current into 2 Q Display range Measuring range EN 61557 4 Resolution Accuracy No of repeat tests as per IEC61557 4
20. ting instructions must be followed to avoid risk of danger Riso PASS FAIL indicates whether the measured insulation resistance is above or below the factory set acceptable value Insulation Test Voltage selection indicates the test voltage selected for insulation resistance measurements Error Refer to the specific error codes for further details STORE LCD data is being stored in the onboard memory RECALL the data shown on the LCD has been recalled from the onboard memory User Memory display indicates the memory location of the results stored or recalled on the LCD Voltage current variation indicates in the measured voltage and current values deviate by more than or less than 5 Battery status icon www nieaf smitt com NIEAF SMITT 4 2 Power on off of the EazyPV To switch the EazyPV on press the Rpe and Auto buttons simultaneously Attention Press and hold the buttons a few seconds to turn the tester on off 4 3 Battery condition The EazyPV automatically performs a battery condition check whilst idle and during measurements When the battery level is low the battery symbol icon will appear on the display The EazyPV will continue to function however the batteries should be replaced Tip When the battery symbol icon is flashing all tests will be inhibited and the batteries immediately must be replaced as described in section 7 3 f tt i Nieaf Smitt is a brand name of pa MEREN www ni
21. y Mors Smitt B V Warning danger It s forbidden to execute measurements if strong electrostatic or electromagnetic fields are present Tip Contact Mors Smitt B V if you require information concerning training regarding the EazyPV tester Tel 31 0 30 2881311 general www nieaf smitt com Nieaf Smitt is a brand name of Mors Smitt Mors Smitt A Wabtec Company NIEAF www nieaf smitt com SMITT 7 oO Nieaf Smitt is a brand name of Mors Smitt O Mors Smitt g A Wabtec Company 2 General The Solar Installation EazyPV is a hand held battery powered multi function solar photovoltaic installation test instrument capable of performing all of the electrical tests required by IEC 62446 The following tests can be performed with the EazyPV e Earth continuity 200 mA e Open circuit module string or array voltage e Voltage polarity e Short circuit module string or array current e Insulation resistance at 250 V 500 V and 1000 V e AC or DC operating current 2 1 Intended use The EazyPV is testing according IEC 62446 in order to determine the electrical safety of Photovoltaic systems Attention The EazyPV is a tool to determine the electrical safety of Photovoltaic systems Before any electrical test are performed a visual inspection is required 2 2 Target group The target group of people for whom the tester and this user manual are applicable are technical qualified persons Technical quali
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