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Copyright HT ITALIA 2020

Release EN 1.00 - 30/11/2020

PV-ISOTEST

User manual

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Summary of Contents for PV-ISOTEST

Page 1: ... Copyright HT ITALIA 2020 Release EN 1 00 30 11 2020 PV ISOTEST User manual ...

Page 2: ...13 6 1 3 Carrying out continuity measurements in Timer TMR mode 15 6 1 4 Anomalous situations 17 6 2 M Measurement of insulation on PV modules strings fields 18 6 2 1 Measuring insulation DUAL mode 18 6 2 2 Measuring insulation TMR mode 20 6 2 3 Anomalous situations 23 6 3 GFL Searching for conditions of low insulation on PV strings 25 6 4 DMM Multimeter function 29 7 STORING RESULTS 30 7 1 Saving...

Page 3: ...PV ISOTEST EN 2 11 2 Dielectric Absorption Ratio DAR 36 12 ASSISTANCE 37 12 1 Warranty conditions 37 12 2 Assistance 37 ...

Page 4: ...sts In this manual and on the instrument the following symbols are used Warning observe the instructions given in this manual improper use could damage the instrument or its components High voltage danger electrical shock hazard Double insulation DC voltage AC voltage Connection to earth 1 1 PRELIMINARY INSTRUCTIONS This instrument has been designed for use in the environmental conditions specifie...

Page 5: ... 7 4 Measured circuits reads Circuits are divided into the following measurement categories Measurement category IV is for measurements performed at the source of the low voltage installation Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units Measurement category III is for measurements performed on installations inside buildings Exa...

Page 6: ...ce on PV modules strings M Test voltages of 250V 500V 1000V 1500VDC in compliance with standards IEC EN62446 1 IEC EN61557 2 2 available measuring modes DUAL Measurement in a sequence of the insulation between the string s positive pole and PE and between the string s negative pole and PE TMR single timed measurement between the string s negative pole and PE GFL Ground Fault Locator function to se...

Page 7: ...R SUPPLY The instrument is battery supplied For battery type and life see Errore L origine riferimento non è stata trovata The symbol indicates a full charge level of the internal batteries When battery charge decreases to a minimum level the symbol appears on the display In this case stop testing and replace the batteries according to the indications given in 9 2 The instrument is capable of keep...

Page 8: ...ector for optical USB cable 5 Key GO STOP 6 Key HELP 7 Key ESC MENU 8 Key ON OFF Fig 1 Description of the front part of the instrument CAPTION 1 Inputs P N E C Fig 2 Description of the upper part of the instrument CAPTION 1 Connector for connecting optically insulated optical USB output cable Fig 3 Description of the instrument s side ...

Page 9: ...ble connections between the instrument and the system Key long pressing to adjust the display s backlight 4 3 DISPLAY DESCRIPTION The display is a graphic module with a resolution of 128 x 128 dots The displays first line indicates the systems date time and contains the battery charge indicator At the bottom of the display the active mode is shown 4 4 INITIAL SCREEN When switching on the instrumen...

Page 10: ... n g s I n f o r m a t i o n 5 1 1 Language Move the cursor to Language by using the arrow keys and confirm with ENTER The instrument shows the screen which allows setting the system language Select the desired option by using the arrow keys Press the ENTER key to confirm or the ESC key to go back to the previous screen SET 14 09 17 34 E n g l i s h I t a l i a n E s p a ñ o l D e u t s c h F r a ...

Page 11: ...tion by using the arrow keys Press the ENTER key to confirm or the ESC key to go back to the previous screen SET 15 10 18 04 AutoPowerOff OFF Keys beep OFF 5 1 4 Info Move the cursor to Info by using the arrow keys and confirm with ENTER The instrument shows the initial screen as indicated in the screen to the side Press the ESC key to go back to the main menu 15 10 18 04 PV ISOTEST HT S N 2034567...

Page 12: ...urrent 200mA according to the prescriptions of IEC EN62446 1 and IEC EN61557 4 guidelines 6 1 1 Calibration of measuring cables 1 Position the cursor onto RPE by using the arrow keys and confirm with ENTER The display shows the following screen RPE 15 10 18 04 R I t e s t m A STD 2 00 MODE Lim 2 Use the arrow keys or and select the position The display shows the screen to the side RPE 15 10 18 04 ...

Page 13: ...e on the display RPE 15 10 18 04 R I t e s t m A Measuring STD 2 00 MODE Lim 6 At the end of the compensation procedure in case the measured resistance value is 5 the instrument emits a double tone to signal the positive result of the test and displays the value of the compensated resistance of the cables which will be subtracted from all the subsequent continuity measurements at the bottom on the...

Page 14: ...t establish a limit value or resistance and typical values are approx 1 or 2 RPE 15 10 18 04 R I t e s t m A STD 2 00 MODE Lim 4 Carry out the initial calibration of the measuring cables see 6 1 1 5 Connect the instrument to the PV module string being tested and to the main earth node of the system as shown in Fig 5 CAPTION E Green cable C Blue cable 1 PV module string 2 Main system earthing 3 Ear...

Page 15: ... object being tested If the result is lower than the set maximum limit value the instrument shows the message OK value lower or equal to the set limit threshold otherwise it displays the message NO OK value higher than the set limit threshold as shown in the screen to the side 8 Press the SAVE key to store the test result in the instrument s memory see 7 1 or the ESC MENU key to exit the screen wi...

Page 16: ...lue or resistance and typical values are approx 1 or 2 RPE 15 10 6 04 PM R I t e s t m A T s TMR 2 00 12s MODE Lim Time 5 Use the arrow keys or and select the position Time The display shows the screen to the side 6 Use the arrow keys to set the duration of continuity measurement Timer which can be selected in a range between 3s 99s in steps of 3s RPE 15 10 18 04 R I t e s t m A T s TMR 2 00 12s M...

Page 17: ... Please wait STD 2 00 12s 0 06 MODE Lim Time 10 At the end of measurement the instrument provides the maximum value among all those of the partial measurements carried out If the result is lower than the set maximum limit value the instrument shows the message OK value lower or equal to the set limit threshold otherwise it displays the message NO OK value higher than the set limit threshold as sho...

Page 18: ...gher that the measured resistance the instrument gives out a long sound and displays the message Zeroing NOT OK RPE 15 10 18 04 R 0 0 3 I t e s t 2 1 2 m A Zeroing NOT OK STD 2 00 0 220 MODE Lim 4 In case the instrument detects a resistance higher than 5 at its terminals it gives out a long sound zeroes the compensated value and displays the message Zero Reset RPE 15 10 18 04 R 4 9 9 I t e s t 4 9...

Page 19: ... the instrument measures insulation in a sequence between the positive pole and the PE reference and between the negative pole and the PE reference of PV modules strings and fields TMR mode the instrument measures continuously with a max duration of 999s between terminal N and PE reference displaying the minimum resistance value obtained at the end of the selected time In this way the instrument a...

Page 20: ... to the string cables must be disconnected and that it is advisable to measure upstream of any blocking diodes Fig 6 Instrument connection for insulation measurement in DUAL mode CAUTION Upon pressing the GO STOP key different error messages can be displayed by the instrument see 6 2 3 and therefore the test cannot be started Check and eliminate if possible the problem causing the error message be...

Page 21: ...row keys again select the TMR measuring mode in position MODE M 15 10 18 04 V t e s t V R i M T i m e s D A R P I V P N V P E V N E 0 V 0 V 0 V TMR 1500V 1 00M 3s MODE Vtest Lim Time 2 Use the arrow keys or and select the position Vtest to set the test voltage 3 Use the arrow keys to select one of the following test voltages Vnom 250 500 1000 1500VDC Please note that in compliance with IEC EN62446...

Page 22: ...visable to measure upstream of any blocking diodes Fig 7 Instrument connection for insulation measurement in TMR mode CAUTION Upon pressing the GO STOP key different error messages can be displayed by the instrument see 6 2 3 and therefore the test cannot be started Check and eliminate if possible the problem causing the error message before going on with the test 9 Press and hold the GO STOP key ...

Page 23: ...strument shows on the display both the value of parameter DAR Dielectric Absorption Ratio and the value of parameter PI Polarization Index see 11 1 Press the SAVE key to store the test result in the instrument s memory see 7 1 or the ESC MENU key to exit the screen without saving and go back to the main measuring screen M 15 10 18 04 V t e s t 1 5 4 0 V R i 1 0 0 M T i m e 6 0 0 s D A R 1 4 1 P I ...

Page 24: ... 7 4 8 V Reverse P N DUAL 1500V 1 00M MODE Vtest Lim 3 In DUAL mode in case the instrument upon pressing the GO STOP key detects a voltage 0 VPN 30V it stops measuring gives out a long sound and the message VPN LIM is shown on the display Check the output voltage from the PV string which should be 30V M 15 10 18 04 V t e s t V I n s r e M R p M V P N V P E V N E 2 0 V 7 5 0 V 7 4 8 V VPN LIM DUAL ...

Page 25: ... voltage of the system change the parameter and Vtest if necessary and repeat the test M 15 10 18 04 V t e s t 1 3 2 0 1 5 1 0 V I n s r e 1 0 0 1 0 0 M R p 1 0 0 M V P N V P E V N E 1 5 0 0 V 7 5 0 V 7 4 8 V VPN Vtest DUAL 1500V 1 00M MODE Vtest Lim 6 In case the instrument detects that Rp Lim the message NOT OK is shown on the display M 15 10 18 04 V t e s t 1 5 4 0 1 5 2 0 V I n s r e 0 1 1 0 0...

Page 26: ...faults it is recommended to carry out the measurements in environmental conditions similar to those in which the fault was reported 1 Position the cursor onto GFL by using the arrow keys and confirm with ENTER The display shows the screen to the side The indication Rp indicates the parallel of the insulation resistances of the positive and negative poles of the string being tested GFL 15 10 18 04 ...

Page 27: ...hat it is advisable to measure upstream of any blocking diodes Fig 8 Instrument connection for insulation measurement in GFL mode CAUTION Upon pressing the GO STOP key different error messages can be displayed by the instrument see 6 2 3 and therefore the test cannot be started Check and eliminate if possible the problem causing the error message before going on with the test 9 Press and hold the ...

Page 28: ...NMOD Vtest Lim 12 In case a fault is present Rp Lim in position NMOD 1 downstream of the last module the instrument shows the screen to the side and the message GND Fault NMOD on the display Check the insulation state of the conductor coming from the string GFL 15 10 18 04 R p 0 0 M V P N V P E V N E 1 4 8 0 V 7 5 0 V 7 4 8 V GND Fault 14 14 1500V 0 10M NMOD Vtest Lim 13 In case a fault is present...

Page 29: ...V N E 1 4 8 0 V 7 5 0 V 7 4 8 V GND Fault 13 14 14 1500V 0 10M NMOD Vtest Lim 15 In case a fault is present Rp Lim within the string the instrument shows the screen to the side and the message relevant to the example with NMOD 14 GND Fault 8 9 on the display Check the state of insulation of the junction boxes of the modules indicated and related connection cables GFL 15 10 18 04 R p 0 0 M V P N V ...

Page 30: ...ing the arrow keys and confirm with ENTER The display shows the screen to the side DMM 15 10 18 04 V P N r m s 0 V V P E r m s 0 V V N E r m s 0 V V P N d c 0 V V P E d c 0 V V N E d c 0 V 2 Connect the instrument to the PV string to be tested as shown in Fig 8 3 The voltage values are shown on the display as illustrated in the screen to the side DMM 15 10 18 04 V P N r m s 1 4 8 0 V V P E r m s 7...

Page 31: ...mment associated with the measure in which a text of max 30 digits can be entered SAVE 15 10 18 04 M e a s u r e 0 0 3 I n s t a l l a t i o n 0 0 1 S t r i n g M o d u l e C o m m e n t m a x 3 0 d i g i t s 2 Use the arrow keys or to select the marker and the arrow keys to change the label of the associated numeric value e g Area among those available or customizable by the user max 20 names 3 S...

Page 32: ...Pag DEL 2 Use the arrow keys to select the measure to be recalled to display 3 Press the SAVE ENTER key to display the saved measure Press the ESC MENU key to go back to the previous screen 4 Use the arrow keys or to select option Pag and proceed to the next screen 5 Select the option DEL to delete the whole content of the instrument s memory The following screen appears on the display MEM 15 10 1...

Page 33: ... using the Microsoft Windows Task Manager function if necessary The optical port emits invisible LED radiations Do not directly observe with optical instruments Class 1M LED apparatus according to standard IEC EN 60825 1 To transfer data to the PC follow this procedure 1 Switch on the instrument by pressing the ON OFF key 2 Connect the instrument to the PC via the provided optical USB cable C2006 ...

Page 34: ...ert and trained technicians should perform this operation Before carrying out this operation make sure you have disconnected all cables from the input terminals 1 Switch off the instrument by pressing and holding the ON OFF key 2 Remove the cables from the input terminals 3 Loosen the battery compartment cover fastening screw and remove the cover 4 Remove all the batteries from the battery compart...

Page 35: ...ated test current 1mA on R 1k x Vnom with VPN VPE VNE 0 Selectable Timer 3s 999s Continuity of protective conductors RPE Range Resolution Accuracy 0 00 9 99 0 01 2 0 reading 2digits 10 0 99 9 0 1 100 1999 1 Test current 200mA DC up to 5 cables included resolution 1mA accuracy 5 0 reading 5digits Open circuit voltage 4 V0 10V GFL Ground Fault Locator Test voltage DC V Range M Resolution M Accuracy ...

Page 36: ... or 6x1 2V NiMH rechargeable batteries type AA LR06 Low battery indication symbol on the display Battery duration 500 test for each function Auto power off after 5 minutes idling 10 2 4 Mechanical characteristics Size L x W x H 235 x 165 x 75mm 9 x 6 x 3in Weight batteries included 1 2kg 2 5lv Mechanical protection IP40 10 3 ENVIRONMENTAL CONDITIONS FOR USE Reference temperature 23 C 5 C 73 F 41 F...

Page 37: ... resistance measured after 1 minute and after 10 minutes The test voltage is maintained throughout the whole duration of the test and at the end the instrument provides the value of ratio min 1 min 10 re Ins re Ins PI Some reference values PI Value Insulation condition from 1 0 to 1 25 Not acceptable from 1 4 to 1 6 Good 1 6 Excellent 11 2 DIELECTRIC ABSORPTION RATIO DAR Parameter DAR consists in ...

Page 38: ...nsequence of improper packaging Repairs which may become necessary as a consequence of interventions performed by unauthorized personnel Modifications to the instrument performed without the manufacturer s explicit authorization Use not provided for in the instrument s specifications or in the instruction manual The content of this manual cannot be reproduced in any form without the manufacturer s...

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Page 40: ...8775 Fax 55 19 9979 11325 eMail vendas ht instruments com br Web www ht instruments com br HT INSTRUMENTS USA LLC 3145 Bordentown Avenue W3 08859 Parlin NJ USA Tel 1 719 421 9323 eMail sales ht instruments us Web www ht instruments com HT INSTRUMENTS GMBH Am Waldfriedhof 1b D 41352 Korschenbroich GER Tel 49 0 2161 564 581 Fax 49 0 2161 564 583 eMail info ht instruments de Web www ht instruments de...

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