ENGLISH User`s manual
Contents
1. m 7 4 1 2 ono HO M X oe 7 4 1 3 Current measurement through external transducer esses eene nennen nnne 7 4 1 4 Phase sequence and phase conformity measurement eene 7 4 2 HOLD MAXIMIN AVG PEAKS ciue aaen etes e taceat FRA punit p Ee oap ao Vot ca weap Ss Una teen bla UD e ds 8 LVXMEEMIOSUD ieii 8 LEE Wwaumvicemm 8 Lv e A m a a E E A A A E E 8 4 3 V v Hz DC AC voltage and frequency measurement M73 and M75 9 43 1 Frequency measurement odere ERE DEDE HENDRER oaar Eai reni aa En E a aaie Eoo EE ENEE 10 4 3 2 Anomalous cases which may occur during V Hz measurements 11 4 4 A v Hz DC AC current and frequency measurement cscseesesesesesesesesececscscscscsesesesesasavsacseseseseseseseseees 12 4 4 1 Frequency measurement ssssssssseeeeeenen nennen nnne nenre enr en tents nenne inner inrer 13 4 4 2 Anomalous cases which may occur during A z Hz measurements ssssssssssseeeeenes 14 4 5 Q Resistance measurement and continuity test treten tenens 15 LOU EMERIS anre s 15 4 5 2 Anomalous cases which may occur during Q Isis zT A ERN RE 16 4 6 Phase sequence and conformity measurement eene nnne 17 4 6 1 Anomalous cases which may occur during NESTS2. 8 At the end of the test if the earth Ra Measured value of resistance value is lower than 19990 us earth the instrument emits a double sound i and displays a screen like this reporting Li Q The symbol HOLD the value of the measured global earth remains on until a resistance and the current at which the uoi n mc ue measurement has been performed t Een de usen Ima Current used during the measurement 9 If a test current of 100mA has been Ra Measured value of selected and the earth resistance value n earth is lower than 19990 by pressing FUNC nri one you will display alternatively the values m nnm The symbol HOLD of the global earth resistance and the lm m m remains on until a prospective short circuit current phase uoi but Se to earth as well as the current at which unn Luc the measurement has been performed GO bus Cum urrent use uring the measurement 10 At the end of the test if the global earth Ra Measured value of resistance value is higher than 1999Q ae BU RE Li Q than full scale the instrument emits a double sound and displays a screen like this gt 0 L L The symbol HOLD l remains on until a new measurement can be taken CAUTION To guarantee the correctness of measurements a certain interval of time is necessary between a measurement and the following During this period the symbol HOLD is displayed and no measurement can be taken When the symbol HOLD disappear
3. ENEE 39 5 3 Cleaning sna aa a a e a a a a 39 5 4 aneko anie E E 39 TECHNICAL SPECIFICATIONS irienna aeaaeae a aaaea pea eaaa aaa EELEE EAE EEA aata 40 6 1 euaricMSIice 40 61 1 BIC CHICA E 42 Gl 2 Safety Stam ans E 42 6 1 3 General specifications ee cece eee enne ee eeee ee ee eae ee ee eaaeeeseeeae eee ceaeeeeeeaaeeeseeaaeeeseeeeeesaeeeseeaeeseneeeensnaeeeeeeaas 42 6 2 bs lude 42 6 2 1 Environmental conditions oed erede reete ete rior Ra eue o ERR E d DEEE ee d dore ua ns e Iesu EN hd exces 42 oA No 42 6 3 ACCESSORIES orenian ae errero Dep Mee usi UE AL 42 DERVIGE eds 43 7 1 Waranty conditons Rr P 43 7 2 DAEILIESJSU D 43 IN HT MULTITEST M72 M73 M74 M75 1 SAFETY PRECAUTIONS AND PROCEDURES This instrument complies with safety Standards EN61557 and EN61010 1 related to electronic measuring instruments For your own safety and to avoid damaging the instrument follow the CAUTION procedures described in this instruction manual and read carefully all notes preceded by this symbol AN When taking measurements ce Se avoid doing
4. If during a frequency measurement the detected value exceeds 400Hz the instrument displays the screen beside If during a frequency measurement the detected value does not reach 30 0Hz the instrument displays the screen beside V S CNC Ou v on A V es V gt uu A V unns OLILI A V 3nn lt JUN A EN 11 IN HT MULTITEST M72 M73 M74 M75 4 4 AX Hz DC AC CURRENT AND FREQUENCY MEASUREMENT R1 Fig 3 Connection of the instrument s terminals during A Hz test T o Turn on the instrument 2 AN Press the arrow keys to select Ax Hz 3 Insert the banana connectors of the clamp transducer in the corresponding input terminals of the instrument black with black green or red with green 4 Make sure that the clamp full scale and the instrument full scale do correspond If they do not the measured value will be wrong To set the clamp full scale refer to paragraph 4 1 3 5 Open the jaws and insert the cable in the very middle as shown in Fig 3 Current and frequency values will be displayed 6 The instrument automatically switches from AC to DC current basing on the signal applied to terminals minimum limit of DC current is 1 0mV x transduction ratio of the clamp lower values are nullified 7 Example of DC current displaying The A DC current value DC SED Aun p Ld 4 m EN 12 IN HT MULTITEST M72 M
5. 1 Turn on the instrument 2 AN Press the arrow keys to select MQ Select test voltage pressing MODE PEAK key between 250 and 500VDC 3 Insert the black and green cables in the corresponding input terminals of the instrument 4 If the cable length is not sufficient for the measurement extend the black one with an adequately insulated cable as its insulation is in parallel to the resistance to be measured It must be suspended and not laid to earth and all supports must be of insulated material 5 If necessary insert the croco clips on the test probes 6 Disconnect the circuit or the part of plant under test from power and all eventual loads 7 Connect the instruments terminals to the end of the conductors on which the insulation test must be performed see Fig 10 8 RI Press GO to start the measurement EN 28 IN HT MULTITEST M72 M73 M74 M75 CAUTION measuring or discharging eventual capacitors During this phase never f The message Measuring on the display means that the instrument is disconnect nor touch test leads 9 At the end of the test before giving the result of the measurement the instrument automatically discharge eventual capacitors and parasite capacitances present among the conductors involved in the measurement 10 At the end of the test if the resistance MO Resistance value value is higher than 0 5MQ or 0 25MQ for 250V the instrument emits a doub
6. 4 5 7 8 The error SPLIT PAIRS consists in the exchange of two conductors belonging to different pairs The pin to pin correspondence seems intact but physically the conductors of two couples are split Such interaction hardly affects or even makes impossible the exchange of data at high frequency speed CAUTION The error condition SPLIT PAIRS is verified only when the cable mapping is N fully correct For a correct detection of such error condition it s necessary that the cable under test is at least 1m long EN 22 NHT MULTITEST M72 M73 M74 M75 4 7 3 Cabling errors Cabling errors Description Visualization Mapping Lan STP ng One or both conductors Lil OPEN PAIR of the pair are interrupted UNT m 12 open OPEN FAULT oL 1 NOT OK Lan STP REVERSED PAIR The conductors of the UNIT Li L same pair are reversed 12 REV FAULT oL 14 NOT OK Lan STP Two conductors are in Hu SHORTED CABLES short circuit between NT i 8 each other FAULT SHORT v 4 NOT OK LAN EL STP TRANSPOSED unr Af ia X CROSSED PAIRS Two pairs are crossed 12 78 FAULT 4 CROSS NOT OK Lan STP Generic cabling error ni such as for example two LL MISWIRE conductors belonging to MT Ss different pairs are exchanged
7. TQ 20 47 LAN Cabling test M75 E X 21 4 7 1 Anomalous cases which may occur during LAN tests nennen 22 4 7 2 SPLIT PAIRS explicatioriote urere terret rtt trente Pear oett Eea ai EOE ERR RARI PES 22 47 3 Cabling ertors rem croceo tatem o ac erectae dpa che e Tec Faden a d cig ede Uo gu Ea eoadenh aux deta tense E vec 23 4 8 Q 0 2A Continuity test on earth protective and equalizing potential conductors M72 M74 M75 24 48 1 C OAL modes eire Dee uie REFORM ui A eetetetesiieer eire tate 25 4 8 2 Anomalous cases which may occur during Q 0 2A tests nemen 27 4 9 MQ Insulation resistance measurement test voltage 500V zzz sssssssssseee eene 28 4 9 1 Anomalous cases which may occur during MQ tests essssssseeeeene emen 29 4 10 RCD Tests on AC type RCDs M73 M74 M75 nennen nnne enne nennen enn nenne 30 4 10 1 Anomalous cases which may occur during RCD tests nennen 31 4 11 Ra l Measurement of global earth resistance M73 M74 M75 sss meme 33 4 11 1 Anomalous cases which may occur during Ra l rj 35 4 12 AUTO Automatic cycle of measurements to test a plant M74 M75 sssseeee 37 MAINTENANCE x EEE 39 5 1 Cu rcp M 39 5 2 sEtzisarzr te duime P E
8. resistance IAN Measured value of tripping time Value of test current OK Auto Measured value of resistance Value of test voltage EN 38 IN HT MULTITEST M72 M73 M74 M75 5 MAINTENANCE 5 1 GENERAL This is a precision instrument Strictly follow the instructions for use and storage reported in this manual to avoid any possible damage or danger during use Do not use this tester under unfavorable conditions of high temperature or humidity Do not expose to direct sunlight Be sure to turn off the tester after use If the instrument is not to be used for a long period you are recommended to remove batteries to avoid leakages of battery liquid which may damage its internal circuits 5 2 BATTERY REPLACEMENT When the low battery indication refer to paragraph 6 1 3 is displayed the batteries are to be replaced CAUTION removing batteries disconnect the test leads from the input terminals to avoid j Only skilled technicians can open the instrument and replace batteries Before electrical shocks Switch off the instrument Remove test leads from the input terminals Remove the battery compartment cover by using a screwdriver Remove all batteries replacing them with new ones all of the same type refer to paragraph 6 1 3 respecting the polarity signs Re allocate the battery pack taking care that the part from which the black
9. 2e probes the instrument displays the screen beside L L kQ a EN bus Daf EN 16 IN HT MULTITEST M72 M73 M74 M75 9 4 6 PHASE SEQUENCE AND CONFORMITY MEASUREMENT CAUTION The maximum input voltage is 550 10 V Don t try to measure higher voltages to avoid risks of electrical shocks or serious damages to the instrument Do not use the instrument on plants whose interlinked rated voltage is higher than 550V Verde a A m um um f omm eee mo mo wt Negro hate Fig 6 Connection of the instrument s terminals during 12 test 1 Turn on the instrument 2 AN Press the arrow keys to select 3 Press MODE PEAK to select function 1W 1 terminal measurement or 2W 2 PEAK J terminal measurement CAUTION Mode 1W requires the operator to touch the measuring key without gloves and be at the earth potential and the star centre of the system under test to be at the earth potential Only if these conditions are met mode 1W provides correct results In absence of just one of the above mentioned conditions operator wearing protective gloves or mounting a ladder IT systems etc select mode 2W 4 Insert the black wire in the corresponding input terminal of the instrument If necessary install the croco clip on the test probe 5 If mode 2W has been selected insert the green wire in the corresponding input terminal of the instrument and connect the
10. During measurements at the end of each test the partial values are displayed for 5 seconds then the instrument passes to the following test At the end of the Ra test if the earth resistance value is lower than 50V l4 the instrument displays for 5 seconds a screen like this then it passes to the following measurement Refer to paragraph 4 11 for further details or information regarding the negative outcome of the test or anomalous situations At the end of the test if the detected tripping time is lower than the maximum admittable limit the instrument displays for 5 seconds a screen like this then it passes to the following screen For further details or information regarding the negative outcome of the test or anomalous situations refer to paragraph 4 10 At the end of the MQ test if the detected resistance value is higher than 0 5MO the instrument displays for 5 seconds a screen like this then it passes to the following screen For further details or information regarding the negative outcome of the test or anomalous situations refer to paragraph 4 9 At the end of the AUTO test if all tests have a positive outcome the instrument emits a double sound to signal the positive outcome and displays a screen like this To display partial results press FUNC HOLD The single test results are dislayed cyclically by any new pressure on this key 1 t Auto naer lal apgo Q Dm Measured value of global earth
11. FAULT l y MISW NOT OK Lan STP The pin to pin ni correspondence is hold LI SPLIT PAIRS but physically the NT 96 45 conductors of two pairs are crossed FAULT l Hd Pon NOT OK NONOVUAWNFE NONOUAWNE NONOAUAWNEF YNYONOAUAWNEF YNYNONOAUAWNE YNONOUAWNE NONOAVUAWNEF NONOR WNE NONOAUAWNEF YNONOAUAWNE NONOAUAWNE NONOAUARAWNE EN 23 IN HT MULTITEST M72 M73 M74 M75 4 8 0 2A CONTINUITY TEST ON EARTH PROTECTIVE AND EQUALIZING POTENTIAL CONDUCTORS M72 M74 M75 The measurement is performed with a test current higher than 200 mA R lt 5Q and open circuit voltage ranging from 4 to 24V DC according to EN 61557 2 and VDE 0413 part 4 CAUTION Before performing the continuity test make sure that no voltage is present at the ends of the conductor under test Re Fig 8 Connection of the instrument s terminals during Q 0 2A test Turn on the instrument 2 AN Press the arrow keys to select Q 0 2A 3 4 5 6 Insert the black and green cables in the corresponding input terminals of the instrument If the cable length is not sufficient to perform the test extend the black one If necessary insert the croco clips on the test probes If the measuring cables being used have not been calibrated first calibrate them as described in paragraph 4 8 1 7 Connect the instruments terminals to the ends of the conductor on w
12. available EN 7 IN HT MULTITEST M72 M73 M74 M75 4 2 HOLD MAX MIN AVG PEAK The following functions are available for measurements of AC and DC voltage AC current frequency and resistance 4 2 1 HOLD The HOLD function permits to block on the display the detected value during measurements of AC and DC voltage AC current frequency and resistance Just press FUNC HOLD for at least one second The symbol HOLD is displayed To escape this function press again FUNC HOLD or the arrow keys This function is not available when MAX MIN AVG or PEAKx functions are active 4 2 MAX MIN AVG During measurements of AC and DC voltage AC current frequency and resistance it s possibile to measure and display the maximum MAX minimum MIN and average AVG valus of the quantity under test Press FUNC HOLD for more than one second to enter this function and press it repeatidly for less than one second to run through MAX MIN or AVG The corresponding symbol is displayed Maximum minimum and average values are detected since this function is activated and are continuously updated even if not displayed For example while the AC current average value is displayed the maximum and minimum values of the same quantity are continuously updated To escape the MAX MIN AVG function press again FUNC HOLD for more than one second or the arrow keys The MAX MIN AVG function is not available when HOLD or PEAK functions are active 4 2 3 PE
13. normal measuring conditions before using it EN 5 iw MULTITEST M72 M73 M74 M75 4 OPERATING INSTRUCTIONS 4 1 INSTRUMENT DESCRIPTION LEGEND Inputs Display ON OFF key MODE PEAK key Arrows key FUNC HOLD key GO key Remote units for LAN tests M75 only ONDARON MutriTest Fig 1 Instrument description to switch on off the instrument MODE MODE key to select working mode PEAK J PEAK key to select peak measurement FUNC FUNC key to select working mode HOLD HOLD key to stop display updating RI to start a measurement Arrow keys to select measurements AA ey EN 6 ANY HT MULTITEST M72 M73 M74 M75 4 1 1 Turning on When the instrument is turned on it emits a brief sound and all display segments are lit for just one second Then the model number and the firmware release appear on the display see picture referred to M75 Finally the instrument is ready for operation aul E co ro 4 1 2 Auto Power Off The instrument automatically turns off 10 minutes after last pressure of keys To resume operation turn on the instrument again When the instrument must be used for long periods the operator may need to disable the Auto Power Off function In order to do so keep pressed the FUNC HOLD key and turn on the instrument this way the Auto Power Off function is deactivated On next switch on autopower off will be automatically restor
14. podia To resume voltage measurement press MODE PEAK for less than 1 second g MODE To detect the frequency peak value press MODE PEAK for more than 1 PEAK J second see paragraph 4 2 3 c Func To block the detected frequency value on the display press FUNC HOLD for HOLD Jess than 1 second see paragraph 4 2 1 7 RNC To detect maximum minimum and average frequency values press FUNC HOLD HOLD for more than 1 second see paragraph 4 2 2 EN 13 NHT MULTITEST M72 M73 M74 M75 4 4 2 Anomalous cases which may occur during A Hz measurements 1 If the detected current value exceeds the clamp full scale the instrument displays the screen beside Disconnect immediately the clamp from the circuit under test to avoid electrical shocks and damages to the instrument The instrument is 2096 overchargeable than the clamp full scale If during a current measurement the detected frequency value exceeds 400Hz the instrument displays the screen beside If during a frequency measurement the detected value exceeds 400Hz the instrument displays the screen beside If during a frequency measurement the detected value does not reach 30 0Hz the instrument displays the screen beside A AC Wo 0 mum Example of clamp full scale set at 400A AC cn tz als A A AC mri TWU A NF gt A ann AAL A EN 14 IN HT MULTITEST M72
15. test probe to the neutral wire or to the neutral wire of the plant under test If necessary install the croco clip on the test probe 6 Following messages are displayed Measurina the instrument is ready to measure the first phase voltage PH1 secondary display the operator is invited to connect the measuring cable to the cable of the first phase voltage EN 17 MULTITEST M72 M73 M74 M75 A 4 CAUTION For a correct functioning of mode 1W it s necessary that the star centre of the three phase triad under test is at the earth potential In plants with insulated neutral wire like IT systems often present in hospitals airports etc it s necessary to select mode 2W and connect the green probe to the neutral conductor not to the protective conductor In this kind of plants mode 1W may not provide correct results Only for mode 1W press and keep pressed GO or simply touch the surface of the key for the entire duration of the measurement Connect the test probe to the first wire of the three phase triad to be tested 8 When a higher voltage than 110V is detected the symbol PH is displayed and the buzzer emits a prolonged sound AN CAUTION During measurement e GO must be always kept pressed or at least its surface must be always touched only for mode 1W e the test probe except for the phase cable under test must not be in touch or close to any voltage source which may block the measureme
16. the right to modify specifications and prices in view of technological improvements or developments which might be necessary 7 2 AFTER SALE SERVICE Shouldn t the instrument work properly before contacting your distributor make sure that batteries are correctly installed and working check the test leads and replace them if necessary Make sure that your operating procedure corresponds to the one described in this manual Should you need for any reason to return back the instrument for repair or replacement take prior agreements with the local distributor from whom you bought it Do not forget to enclose a report describing the reasons for returning detected fault Use only original packaging Any damage occurred in transit due to non original packaging will be charged anyhow to the customer The manufacturer will not be responsible for any damage to persons or things EN 43
17. the waveform of the signal for a purely Grus sinusoidal wave it s worth 2 1 41 In presence of distortions the higher the wave distortion is the higher the crest factor values get EN 4 IN HT MULTITEST M72 M73 M74 M75 3 PREPARATION FOR USE 3 1 PRELIMINARY CHECKS This instrument was checked both mechanically and electrically prior to shipment All possible cares and precautions were taken to let you receive the instrument in perfect conditions Notwithstanding we suggest you to check it rapidly eventual damages may have occurred during transport if so please contact the local distributor from whom you bought the item Make sure that all standard accessories mentioned in paragraph 6 3 are included Should you have to return back the instrument for any reason please follow the instructions mentioned in paragraph 7 3 2 POWER SUPPLY The instrument is powered by batteries refer to paragraph 6 1 3 for details on model no and battery life When batteries are low a low battery indication is displayed To replace insert batteries follow the instructions indicated in paragraph 5 2 3 3 CALIBRATION The instrument complies with the technical specifications contained in this manual and such compliance is guaranteed for 1 year Annual recalibration is recommended 3 4 STORAGE After a period of storage in extreme environmental conditions exceeding the limits mentioned in paragraph 6 2 1 let the instrument resume
18. 0mA which turn cyclically at each key pressure CAUTION value of the device Otherwise the RCD could trip during the measurement j If a RCD is present select a lower current value than the nominal current and therefore prevent it from being executed 4 By selecting a test current of 100mA you will get also the value of the prospective short circuit current phase to earth calculated according to the formula Icc PZN where Zpe is the global earth resistance value Un is the nominal phase to earth voltage whose value is 127V if 100V lt Vineasurea lt 150V 230V if 150V lt M measured lt 265V As an alternative 5 Insert the black and green cables in the corresponding input terminals of the instrument If necessary insert the croco climps on the test probes 6 Connect the green cable of the instrument to the protective conductor earth and the black cable to the phase conductor as shown in Fig 12 EN 33 IN HT MULTITEST M72 M73 M74 M75 Or e Insert the Shuko cable in the input terminals of the instruments D Insert the Shuko cable in a power socket as shown in Fig 12 The picture represents the connection to power socket Keep pressed GO for at least one second the instrument performs the measurement CAUTION 8 The message Measuring on the display means that the instrument is measuring During this phase never disconnect test leads
19. 73 M74 M75 8 Example of AC current displaying The A AC current value minimum limit of AC current is io 1 0mV x transduction ratio of the clamp 1 mM Kd aS lower values are nullified ary um BENE NEP Hz Qu The minimum reading value of AC and DC current is given by the herewith 1mV x transduction ratio of the clamp Therefore with a clamp 400A 400mV the minimum measurable current is 1 0A Lower input values are displayed as 0 0A To pass to frequency measurement press MODE PEAK for less than 1 9 PEAK J second only during AC current measurements see paragraph 4 4 1 j Frequency value To detect the current peak value press MODE PEAK for more than 1 second 10 LEAK J see paragraph 4 2 3 To block the detected values on the display press FUNC HOLD for less than 11 HOLD 1 second see paragraph 4 2 1 To detect maximum minimum and average current values press FUNC 12 LHOlD HOLD for more than 1 second see paragraph 4 2 2 4 4 1 Frequency measurement 1 In order to detect minimum average maximum and peak values of frequency it s necessary to pass to this measuring parameter 2 Its possible to pass to frequency measurement by pressing MODE PEAK for L PEK J less than 1 second 3 Example of display of frequency value A Frequency value The minimum reading limit of frequency e pe is 30 0Hz Lower input values are L nn displayed as 30 0Hz al LI LI 4
20. 74 M75 Phase sequence and phase conformity Measuring method Working voltage V System P up to 315 V Phase Ground 1 test lead 1W 90 315 Phase Ground up to 550V Phase Phase up to 315 V Phase Neutral up to 550V Phase Phase 1 2 test leads 2W 90 315 Phase Neutral Max crest factor 1 5 Frequency range 45 65 Hz 1 the two wire measurement can be performed also phase to phase in plants without neutral even with one phase to earth but always with phase to phase voltage up to 550V Q 0 2A Continuity M72 M74 M75 Range Resolution Accuracy Overload protection 0 00 19 990 0 010 t 9 SECTS E 5 0 rdg 3 dgt 605V max RMS Test current gt 200mA DC up to 5Q measuring cables resistance included Accuracy of current measurement 1mA Open circuit voltage 4 Vo 24V MQ Insulation resistance 250 500VDC M72 M74 M75 Range Resolution Accuracy Overload protection 0 00 19 99MQ 0 01MQ 5 0 rdg 2 dgt 20 0 199 9MQ 0 1MQ 5 0 rdg 2 dgt 605V max RMS 200 999MQ 1MQ 10 0 rdg 2 dgt For 500VDC test voltage For 250VDC test voltage the range is 200 499MQ Autorange Open circuit voltage lt 1 3 x Vo Accuracy of nominal voltage 096 10 Short circuit current lt 3 0mA Nominal testing current 1mA 1KO x V 1mA 500KQ RCD test on RCD devices AC type M73 M74 M75 Ra
21. AK During measurements of AC and DC voltage and AC current it s possibile to measure and display the maximum PEAK and minimum PEAK peak values of the quantity under test with a resolution of 1ms Press MODE PEAK for more than one second to enter this function and press it repeatidly for less than one second to run through PEAK or PEAK The corresponding symbol is displayed Maximum and minimum peak values are detected since this function is activated and are continuously updated even if not displayed For example while the maximum peak values of AC current is displayed the minimum peak value of the same quantity is continuously updated When displaying maximum and minimum peaks its not mentioned whether the corresponding quantity is AC or DC a peak value is absolutely a peak value regardless of the quantity at which it s detected To escape this function press again MODE PEAK for more than one second or the arrow keys The HOLD and MAX MIN AVG functions are not available when when PEAKt is active EN 8 IN HT MULTITEST M72 M73 M74 M75 4 3 Vz Hz DC AC VOLTAGE AND FREQUENCY MEASUREMENT M73 AND M75 CAUTION voltages to avoid risks of electrical shocks or serious damages to the instrument j The maximum input voltage is 550 10 V Don t try to measure higher Fig 2 Connection of the instrument s terminals during V z Hz test T o Turn on the instrument 2 AN Press the arrow keys to sel
22. ENGLISH User s manual ITALIA CE Copyright HT ITALIA 2006 Release EN 2 00 22 08 2006 IN HT MULTITEST M72 M73 M74 M75 1 SAFETY PRECAUTIONS AND PROCEDURES esee nennen enne nne n nnns en nennen nennen enne EAEE Enne nant 2 1 1 Preliminary instructions 1 2 Ip SE I 1 3 Diar c 1 4 Overvoltage categories definitions eec itii annees ipa ds abusu seda Eds ta usua Ferdi e 3 Cis IsiosMseeidenp w 4 2 1 led E wea aaa 4 2 2 TRMS value and mean value definitions usssesesseee eene nennen nnne enne 4 2 3 TRUE ROOT MEAN SQUARE VALUE and CREST FACTOR definitions eeenene 4 PREPARATION FOR SUlll 5 3 1 Prrelim riary eecks uie RET Orea ERE URIERRR DI I aE P seatiuters Erna EEEE EErEE NE 5 3 2 uo idee DL 5 3 3 e clci 5 3 4 Mere e E S E r R 5 OPERATING INSTRUCTIONS sssseeseseseeeennere nennen enn en nemen ninh nnne inneren interes enhn e nennen tenen enne nr entere 6 4 1 Instrument DESCmPtlOn e ieee 6 ADV TURING OMe E
23. ESTS ON AC TYPE RCDS M73 M74 M75 The test is performed in compliance with CEI 64 8 612 9 CEI 64 8 6 appendix D EN61008 EN61009 EN 60947 2 part B 4 2 4 1 and VDE 0413 part 6 CAUTION Testing an RCD involves the tripping of the RCD itself Therefore before taking this measurement make sure that no loads are connected to the RCD under N test to avoid damaging them Disconnect all loads connected to the RCD as they could add further leakage currents to those moved by the instrument thus nullifying the test results Fig 11 Connection of the instrument s terminals during RCD test 1 Turn on the instrument 2 AN Press the arrow keys to select RCD 3 By pressing MODE select the test current among the possible values 30mA PEAK J 30mA x5 100mA 300mA which turn cyclically at each key pressure CAUTION Pay attention when setting the test current of the RCD to make sure that the correct one is selected In case a higher current than the nominal one of the device under test is selected the RCD would be tested at a higher current than the correct one thus favouring a quicker tripping of the RCD itself As an alternative 4 Insert the black and green cables in the corresponding input terminals of the instrument If necessary insert the croco clips on the test probes 5 Connect the green cable to the protective conductor earth and the black cable to the phase conductor at the lower end of
24. K Max crest factor 3 0 V 1 0V 1 5 V21 0V DC and AC TRMS current measurement with external jaws The mentioned accuracy does not consider the transducer s accuracy Please refer to its user s manual MAX MIN AVG PEAK resolution 5 0 rdg 10 dgt responce time 500ms MAX MIN AVG 1ms PEAK Minimum input current 1mV x transduction ratio of the clamp Max crest factor 3 0 V 1 0V 1 5 V21 0V Frequency measurement with test leads Accuracy Accuracy Accuracy Input Overload mange mescialen DC 30 70Hz 70 400Hz impedance protection 1 0 999 9mV 0 1mV 0 5 rdg 1 0 rdg 2 0 rdg 1MO 605V AC 1 000 1 200V 0 001V 2 dgt 2 dgt 2 dgt max RMS Range Resolution Accuracy Input impedance 30 0 199 9Hz 0 1Hz o 200 400Hz 1Hz 0 5 rdg 2 dgt 1MQ Input voltage 1mV 605 0V Frequency measurement with jaws Range Resolution Accuracy Overload protection 30 0 199 9Hz 0 1Hz o 200 400Hz 1Hz 0 5 rdg 2 dgt 605V AC max RMS Input voltage 1mV 1V Resistance and continuity test Range Resolution Accuracy Overload protection 0 00 39 99 Q 0 010 40 0 399 9 Q 0 10 5 l 400 3999 Q 10 1 0 rdg 5 dgt 605V AC max RMS for 1 minute 4 00 39 99 KQ 100 The buzzer sounds while measured resistance is lower than 409 EN 40 IN HT MULTITEST M72 M73 M
25. M73 M74 M75 4 5 Q RESISTANCE MEASUREMENT AND CONTINUITY TEST CAUTION Before taking resistance measurements make sure that the circuit under test is not powered and that eventual condensers are discharged Fig 4 Connection of the instrument s terminals during Q test 1 Turn on the instrument Press the arrow keys to select Q 3 If the measuring cables being used have not been calibrated first calibrate them as described in paragraph 4 5 1 4 Insert the black and green cables in the Q Resistance value corresponding input terminals of the instrument CAL a al ri B EEN 5 Position the test probes on the desired Al L Li points of the circuit under test see Fig 4 6 Example of display of resistance value If such value is lower than 40Q the instrument emits an acoustic signal 7 To block the detected value on the display press FUNC HOLD for less than 1 LHOLD second see paragraph 4 2 1 To detect maximum minimum and average values press FUNC HOLD for HOLD i more than 1 second see paragraph 4 2 2 9 The measured value is out of accuracy if an input voltage is present 4 5 1 CAL mode 1 Any addition or replacement of cables extensions and croco clips nullify the previous calibration and make necessary a new calibration before performing further measurements Therefore the instrument must be calibrated in the same conditions at which it will operate during me
26. and red wires come out is positioned backwards 6 If the battery pack is re allocated in a wrong way the battery compartment can not be closed In this case do not force the plastic parts but re position the battery pack correctly before closing 7T Replace the battery compartment cover making a pressure to close it 8 Use the appropriate battery disposal methods for your area pem mc e 5 3 CLEANING Use a soft dry cloth to clean the instrument Never use wet cloths solvents water etc 5 4 ENDOFLIFE Caution this symbol indicates that equipment and its accessories shall be subject to a separate collection and correct disposal EXE EN 39 MULTITEST M72 M73 M74 M75 6 TECHNICAL SPECIFICATIONS This product conforms to the prescriptions of the European directive on low voltage 73 23 EEC LVD and to EMC directive 89 336 EEC amended by 93 68 EEC 6 1 CHARACTERISTICS Accuracy is indicated as of reading digit number It is referred to the following reference conditions 23 C 5 C with RH lt 70 DC and AC TRMS voltage measurement Accurac Accurac Accurac Input Range rieselDon DC 30 TOHA 70 400Hz M 1 0 999 9mV 0 1mV 1 000 9 999V 0 001V 0 5 rdg 1 0 rdg 2 0 rdg 1MO 10 00 99 99V 0 01V 2 dgt 2 dgt 2 dgt 100 0 605 0V 0 1V MAX MIN AVG PEAK resolution 5 0 rdg 10 dgt responce time 500ms MAX MIN AVG 1ms PEA
27. and the buzzer emits a prolonged sound EN 18 MULTITEST M72 M73 M74 M75 CAUTION During measurement only for mode 1W e GO must be always kept pressed or its surface must be always touched N e the test probe except for the phase cable under test must not be in touch 15 16 17 18 AN the instrument s sensitivity e the test probe must be kept in touch with the phase cable or close to any voltage source which may block the measurement due to At the end of the test if two tested cables are in a correct phase sequenze the instrument emits a double sound to signal the positive outcome of the test and displays a screen like this At the end of the test if two cables belong to the same phase the instrument emits a double sound to sigla the positive outcome of the test and displays a screen like this At the end of the test if two tested cables are not in the correct phase sequenze the instrument emits a prolonged sound to signal the negative outcome of the test and displays a screen like this 30 Jd C J Correct phase sequence Phase rotation rat OK OQ iW Cables belonging to the same phase Compliance between one cable and another a L t rok NOT OK Wrong phase sequence Phase rotation To perform a new measurement press GO then re start from point 6 CAUTION A
28. asurement of total earth resistance M73 M74 M75 only AUTO performance of measurements in Ra L RCD and MQ with automatic sequence M74 M75 only 2 2 TRMS VALUE AND MEAN VALUE DEFINITIONS Safety testers for alternate quantities are divided into two categories e MEAN VALUE instruments instruments measuring only the value of the wave at the fundamental frequency 50 or 60Hz e True Root Mean Square TRMS instruments instruments measuring the true root mean square value of the quantity under test Mean value instruments provide only the value of the fundamental wave while TRMS instruments provide the value of the entire wave including harmonics within the passband of the instrument Accordingly the measured values are identical only if the wave is purely sinusoidal 2 3 TRUE ROOT MEAN SQUARE VALUE AND CREST FACTOR DEFINITIONS The current effective value is defined as follows In an interval of time equivalent to a period an alternate current with effective value having an intensity of 1A by passing on a resistor disperses the same energy which would be dispersed in the same period of time by a direct current having an intensity of 1A From this definition we get the numerical expression G f Trod The effective value is indicated as RMS root mean square T t The crest factor is defined as the ratio between the peak value of a signal and its effective value CF G 6 This value varies according to
29. asurements 2 Short circuit the cable ends with each other as shown in Fig 5 making sure that the metallic parts of test probes and crocodiles are in good touch EN 15 IN HT MULTITEST M72 M73 M74 M75 Verde Fig 5 Connection of the instrument s terminals during calibration procedure 3 Press MODE PEAK for more than 1 second The instrument resets the PEAK J resistance of the cables the symbol CAL is displayed CAUTION While MODE PEAK is pressed the instrument is measuring During this phase never disconnect test leads 4 The instrument performs the calibration of cables with resistance lower than 5Q 5 At the end of the test the measured value is stored by the instrument and used as OFFSET which means it s deducted from all continuity tests performed for all further measurements until a new calibration is made 6 If the value measured during the calibration phase is higher than 5Q the instrument interruptus the calibration removes the offset value previously stored and does not display the CAL symbol until the next positive calibration This method can be used to nullify the last calibration performed 7 Each time the instrument is switched off the calibrated value is lost 4 5 2 Anomalous cases which may occur during Q measurement 1 The full scale of the instrument is Q 39 99kQ If the resistance value is higher than this caL 1 value or in case of open or interrupted
30. der test is not powered Connections to phone lines or active networks could damage the instrument Unit remota Remote unit 7 Cavo di rete Unidad remota le LAN cable Cableado JP Presa Socket P Conexi n Presa Ug Socket Conexi n Fig 7 Connections of the instrument s terminals during LAN tests 1 Turn on the instrument 2 AN Press the arrow keys to select LAN 3 Select the type of cable under test by pressing MODE PEAK set STP whether PEAK shielded UTP whether unshielded Note STP must be chosen for all shielded cables such as FTP Foiled Twisted Pair cable SSTP Shielded Shielded Twisted Pair cable STP Shielded Twisted Pair cable SFTP Shielded Foiled Twisted Pair cable 4 Connect the cable under test to MULTITEST 75 and to the remote unit if necessary through patch cables see Fig 7 CAUTION The remote unit must be necessarily connected to the other end of the cable being tested otherwise no measurement is performed 5 d Press GO to perform all tests related to the selected type of cable 6 If cabling is correct a screen like this is Lu Identification number displayed The identification number 02 STP of the remote unit refers to the remote unit connected to the r 1 other end of the cable being tested L UNIT m m OK EN 21 IN HT MULTITEST M72 M73 M74 M75 7 lf cabling is not correct a
31. e known to the user EN 3 IN HT MULTITEST M72 M73 M74 M75 2 GENERAL DESCRIPTION Dear Customer the instrument you have purchased whether used according to the instructions given in this manual will grant you accurate and reliable measurements Thanks to a development of newest conception assuring double insulation and overvoltage category IIl you will enjoy the highest safety This manual refers to the entire range of MULTITEST family including M72 M73 M74 e M75 models Except where otherwise expressly indicated this manual refers to all these models 2 1 WORKING s VX Hz DC and AC TRMS voltage measurement frequency measurement AWN Hz DC and AC TRMS current measurement frequency measurement by means of current transducer clamp with max full scale of 1V e Qa measurement of resistance continuity with sound signal e Q phase sequence detection at one or two terminals LAN wire mapping for cables UTP STP FTP SCTP SFTP SSTP in any category Cat 3 5 5E 6 etc with connector RJ45 capable of measuring through connection to remote unit M75 only 0 2A continuity test on earth protective and potential equalising conductors with a test current higher than 200mA and open voltage ranging from 4V to 24V M72 M74 M75 only MQ insulation resistance measurement with test DC voltage of 250 500VDC M72 M74 M75 only RCD measurement on RCDs type AC w M73 M74 M75 only Ra Ll me
32. ect V Hz Insert the black and green cables in the corresponding input terminals of the instrument 4 If necessary insert the croco clips on the test probes 5 Connect the cables to the desired points of the circuit under test as shown in Fig 2 The voltage and frequency values will be displayed with automatic range selection 6 The instrument automatically switches from AC to DC voltage basing on the signal applied to terminals 7 Example of display of AC voltage and v AC voltage value frequency values The minimum reading limit of AC voltage is 0 5V Lower input 5 1 lu values are displayed as 0 0V r L l VB UM um V Frequency value EN 9 ANY HIT MULTITEST M72 M73 M74 M75 DC voltage value 8 Example of display of DC voltage The y minimum reading limit of DC voltage is pc 1 2V Lower input values are displayed as 0 0V c3 par Press MODE PEAK for less than 1 second to pass to frequency S measurement only during AC measurements see paragraph 4 3 1 MODE Press MODE PEAK for more than 1 second to detect the voltage peak value 10 L PEAK see paragraph 4 2 3 Press FUNC HOLD for less than 1 second to block the detected values on the T display see paragraph 4 2 1 12 Press FUNC HOLD for more than 1 second to detect maximum minimum and average voltage values see paragraph 4 2 2 4 3 1 Frequency meas
33. ed On the instrument s LCD the symbol C is displayed only when auto power off is active 4 1 3 Current measurement through external transducer The instrument measures current through a clamp transducer to be connected to the input terminals Unlike traditional multimeters it s therefore not necessary to interrupt the current circuit to insert the measuring device Besides it s possible to use more clamps having different full scales according to the current to be measured from time to time To set the full scale of the clamp being used turn on the instrument by keeping pressed MODE PEAK the instrument displays the value of the set full scale To modify such value press the arrow keys to select the desided full scale then press MODE PEAK to validate the modification The instrument is supplied with full scale already pre set for the provided clamp 4 1 4 Phase sequence and phase conformity measurement Additional functions patented distinguishing this instrument from other multimeters available on the market are phase sequence and phase conformity measurements indispensable to interconnect two three phase triads with one test probe The instrument performs tests by simply touching the cable under test with the built in test probe Note The instrument performs test by only touching the conductors under voltage with the single test probe therefore without having to connect both test probes The traditional 2 terminal measurement is however
34. ent guarantee compliance with the safety Standards in force They must be in a good conditions and if necessary replaced with identical ones Do not test nor connect to any circuit exceeding the specified overload protection Do not take measurements under environmental conditions exceeding the limits indicated in this manual Make sure that batteries are correctly installed Before connecting the test probes to the installation make sure that the right function is chosen EN 2 IN HT MULTITEST M72 M73 M74 M75 1 2 DURING USE CAUTION An improper use may damage the instrument and or its components or injure the operator Before selecting any function first disconnect the test leads from the circuit under test When the instrument is connected to circuits never touch any unused terminal Do not measure resistance in presence of external voltages although the instrument is protected an excessive voltage may cause malfunctioning CAUTION If the low battery symbol is displayed during use interrupt testing and replace batteries following the procedure described in paragraph 5 2 1 3 AFTER USE Disconnect the test leads from the circuit under test and switch off the instrument f you expect not to use the instrument for a long period remove batteries 1 4 OVERVOLTAGE CATEGORIES DEFINITIONS Standard EN61010 1 Safety requirements for electrical equipment for measuremen
35. ent is guaranteed against material or production defects in accordance with our general sales conditions During the warranty period the manufacturer reserves the right to decide either to repair or replace the product Should you need for any reason to return back the instrument for repair or replacement take prior agreements with the local distributor from whom you bought it Do not forget to enclose a report describing the reasons for returning detected fault Use only original packaging Any damage occurred in transit due to non original packaging will be charged anyhow to the customer The manufacturer will not be responsible for any damage to persons or things The warranty doesn t apply to e Accessories and batteries not covered by warranty e Repairs made necessary by improper use including adaptation to particular applications not foreseen in the instructions manual or improper combination with incompatible accessories or equipment e Repairs made necessary by improper shipping material causing damages in transit e Repairs made necessary by previous attempts for repair carried out by non skilled or unauthorized personnel e Instruments for whatever reason modified by the customer himself without explicit authorization of our Technical Dept The contents of this manual may not be reproduced in any form whatsoever without the manufacturer s authorization Our products are patented and our logotypes registered We reserve
36. ent s terminals during calibration procedure EN 25 MULTITEST M72 M73 M74 M75 By pressing MODE select CAL 2 Any addition or replacement of cables extensions and croco clips nullify the previous calibration and make necessary a new calibration before performing further measurements Therefore the instrument must be calibrated in the same conditions at which it will operate during measurements 3 Short circuit the cable ends with each other as shown in Fig 9 making sure that the metallic parts of test probes and crocodiles are in good touch B d A 5 The instrument performs the calibration of cables with resistance lower than 59 6 At the end of the test the measured Q CAL message value is stored by the instrument and 02A k means e me used as OFFSET which means it s ca nr m deducted from all continuity tests uni ME smbal remane performed for all further measurements m am displayed during any until a new calibration is made further measurement The instrument emits a double sound to 3ng oe am signal the positive outcome of the Cu Ima atender calibration procedure and displays a OK screen similar to this for 2 seconds Then the default screen corresponding Current supplied by to the O 0 2A test is displayed iB p 7 If the value measured during the calibration phase is higher than 5Q the 02A instrument interruptus the calibration cA En removes the offset value previously gt LILI Q stored and do
37. es not display the CAL symbol until the next positive calibration The instrument emits a prolonged sound r Lr to signal the negative outcome of the reg calibration and displays a screen similar MEASURING to this for 2 seconds Then the default Press GO to start the calibration procedure CAUTION The message Measuring on the display means that the instrument is measuring During this phase never disconnect test leads screen related to the 0 2A test is displayed This method can be used to nullify the last calibration performed EN 26 IN HT MULTITEST M72 M73 M74 M75 4 8 2 Anomalous cases which may occur during Q 0 2A tests 1 If the following condition occur Q Rmeasurep RcauisnarioN lt 0 02Q 02A the instrument displays the screen beside ni and emits a prolonged sound to signal nee the anomalous situation A 1 PLL NOT OK 2 If the voltage present at the terminals is Q higher than 10V the instrument does not 02A perform the test and emits a prolonged ni sound to signal the anomalous situation yi L L UR uU The screen beside is displayed for 5 seconds after which the instrument displays the default value related to the Q 1 r 0 2A test il v A Input voltage 3 If the resistance value is higher than the Q full scale the instrument emits a 02A prolonged sound to signal the anomalous situation A screen
38. hich the continuit test must be performed see Fig 8 8 RI Press GO to perform the measurement EN 24 IN HT MULTITEST M72 M73 M74 M75 CAUTION The message Measuring on the display means that the instrument is measuring During this phase never disconnect test leads Connect the instrument just BEFORE measuring and do not change connections while the message Measuring is present on the display 9 The continuity test is performed by supplying a current higher than 200mA if the resistance value is lower than 5 including the cable resistance stored as offset after calibration For higher resistance values the instrument performs the test with decreasing current 10 At the end of the test if it has been Resistance value possible to generate at least 200mA 02A not particularly high resistance value ca the instrument emits a double sound to ngn Q EB ams signal the positive outcome of the test The screen beside is displayed L Li mA OK Test current value 11 At the end of the test if it has not been Q Resistance value possible to generate 200mA due to the 02A high resistance value the instrument ca rH Ti emits a prolonged sound to signal the T ri Q negative outcome of the test The a screen beside is displayed NOT OK Test current value 4 8 1 CAL mode Fig 9 Connection of the instrum
39. le rH r r sound to signal the positive outcome of n n Q the test A screen similar to this is es displayed Li Jy 6 iL OK Test voltage value 11 At the end of the test if the resistance MQ Resistance value value is higher than 999MQ so higher than the full scale the instrument emits a double sound to signal the positive gt gag Q outcome of the test A screen similar to aa this is displayed Note An insulation value higher than 999MQ is an excellent Lr i T insulation value generally much higher AJU than the minimum requirements OK Testvoliage value prescribed by Standards 12 At the end of the test if the resistance MO Resistance value value is lower than 0 5MQ or 0 25MQ for 250V the instrument emits a nti bf prolonged sound to signal the negative 1 1l MQ Vn outcome of the test A screen similar to this is displayed J0 NOT OK Test voltage value 4 9 1 Anomalous cases which may occur during MQ tests If during measurement the voltage MO present at terminals is higher than 10V the instrument does not perform the test HL and emits a prolonged sound to signal aD L the anomalous situation The screen beside is displayed for 5 seconds after which the instrument displays the default 70 screen related to the MQ test 35 A j Input voltage value EN 29 IN HT MULTITEST M72 M73 M74 M75 4 10 RCD T
40. lthough two cables are in sequence it doesn t mean that the third cable is in sequence too It s not excluded that the cabling was made by mistake with a double phase cable To clear any possible doubt always perform at least two measurements by testing the cables two by two EN 19 IN HT MULTITEST M72 M73 M74 M75 4 6 1 Anomalous cases which may occur during tests 1 If you wait more than 10 seconds between the first measurement and the second one the instrument emits a prolonged sound to signal the negative outcome of the test and displays a screen like this Its necessary to repeat the entire procedure Press GO and re start from point 6 a L LILIE j 7 xc 2 If mode 1W is selected and the instrument detects the connection of the second probe like in mode 2W a screen like this is displayed to signal the error A prolonged sound is emitted until the error condition is removed 30 Los V MEASURING gt e v 3 If mode 2W is selected and the instrument detects an input voltage between the two bushes higher than 605V a screen like this is displayed and a prolonged sound is emitted until the error condition is removed Disconnect the instrument promptly gO m c2 E V MEASURING Pv EN 20 IN HT MULTITEST M72 M73 M74 M75 4 7 LAN CABLING TEST M75 CAUTION j Before taking any measurement make sure that the circuit un
41. nge Resolution Accuracy Overload protection 2 400ms 1ms 2 0 rdg 2 dgt 605V max RMS Phase to ground voltage 110 265V Test currents 30mA 30mA x 5 100mA 300mA Frequency 50Hz 0 5Hz 60Hz 0 5Hz Ra a Measurement of global earth resistance M73 M74 M75 Test current Range Resolution Accuracy Overload protection U 15mA 1 19990 10 5 rdg 2 dgt 605V max RMS 100mA 0 1 199 90 0 10 5 rdg 3 dgt Phase to ground voltage 110 265V Frequency 50Hz 0 5Hz 60Hz 0 5Hz Nominal voltage used for the calculation of the prospective short circuit current 127V if 100V lt Vmeasurea lt 150V 230V if 150V lt Vmeasurea lt 265V Wire mapping M75 Length of the cable 1 100m Number of remote units max 8 units Detected errors OPEN Pairs REVERSED pairs SHORT pairs SPLIT pairs CROSSED pairs MISWIRING According to the norm TIA568B CAUTION In all measurements the instrument dispalys the AN CAUTION symbol when e the instrument is operating in a critical situation as for example in presence of overvoltages e the instrument cannot guarantee the measuring uncertainty lower than 3096 of the reading according to EN61557 1 EN 41 MULTITEST M72 M73 M74 M75 6 1 1 Electrical Conversion Measuring rate Display refreshing rate 6 1 2 Safety standards The instrument complies with Insulation Pollution level Max height Over
42. nt due to the instrument s sensitivity the test probe must be kept in touch with the phase cable 9 At the end of the measurement the wordings Measurine and PH1 disappear The buzzer emits and intermitting sound until the test probe is disconnected drom the phase cable 10 Disconnect the test probe from the cable of the first phase voltage The wording PH present only when the input voltage is detected disappears from the display ad Only for mode 1W keep pressed GO or simply touch its surface for the entire duration of the measurement An eventual release and new pressure on the key cancels all performed measurements In this case repeat all previous passages starting from point 6 12 Following messages are displayed Measure the instrument is ready to measure the second phase voltage PH2 secondary display the operator is invited to connect the measuring cable to the cable of the second phase voltage AN 4 CAUTION If more than 10 seconds pass between the first and the second measurement a message t out is displayed In this case it s necessary to repeat the entire procedure Press GO and re start from point 6 Only for mode 1W keep pressed GO or simply touch its surface for the entire duration of the measurement Connect the test probe to the second cable of the three phase triad to be tested 14 When a higher voltage than 110V is detected the symbol PH is displayed
43. s the instrument is ready for a new measurement EN 34 ANY HT MULTITEST M72 M73 M74 M75 4 11 1 Anomalous cases which may occur during Ra tests 1 If during measurement the RCD Ra protecting the line trips the instrument interrupts the test and emits a prolonged 1 X gt ILL NER sound to signal the anomalous situation The screen beside is displayed for 5 seconds after which the instrument displays the default screen of Ra l test wy el Lu 2 If during measurement a higher input voltage than 265V is detected for example if both cables connected to 1 phase conductors of a 400V three phase L L plant the instrument does not perform m the test and emits a prolonged sound to signal the anomalous situation The 26S cOJ o screen beside is displayed for 5 seconds after which the instrument displays the A default screen of Ra al test 3 If during measurement a lower input voltage than 110V is detected the instrument does not perform the test and ni emits a prolonged sound to signal the nce anomalous situation The screen beside is displayed for 5 seconds after which the instrument displays the default screen of ur LJ H 2 Ra l test This can happen for example if the black cable is erroneously connected to the neutral conductor instead of the phase one If a Shuko cable is used rotate the plug and repeat
44. screen like this LAN Identification number is displayed NOT OK Referring to this STP of a if example FAULT 1 4 means that the K possible to find it rs detected errors are 4 of which the first one is currently displayed Details on the UNIT LO detected error are given on the right side 12 OPEN the couple 1 2 is open By pressing FAULT uf Number of the FUNC HOLD key it s possible to run over 1 de Mer M ini H number 0 e the remaining screens and display other NOT OK dde ids cabling errors FAULT 2 4 FAULT 3 4 FAULT 4 4 The number of the remote unit can be not displayed CAUTION a STP cable is tested test results may be not reliable due to the shield j Its indispensable to select the right type of cable If UTP is selected although affecting the measurement 4 7 1 Anomalous cases which may occur during LAN tests If the voltage present at the terminal is LAN higher 0 2V the instrument does not STP perform the test and emits a sound to ni signal the anomalous situation The mee screen beside is displayed am a gt MJ LL v A CAUTION j Before taking any measurement make sure that the circuit under test is not powered Connections to phone lines or active networks could damage the instrument 4 7 2 SPLIT PAIRS explication note A LAN cable contains 8 conductors twisted two by two thus forming 4 pairs 1 2 3 6
45. similar to this is gt Ooo Q displayed The same message may also a a m mean that mesuring cables are disconnected or open EN 27 IN HT MULTITEST M72 M73 M74 M75 4 9 MQ INSULATION RESISTANCE MEASUREMENT TEST VOLTAGE 500V The measurement is performed according to EN 61557 2 and VDE 0413 part 1 CAUTION e before performing the insulation test make sure that the circuit under test is not energized and all relative loads are disconnected e the insulation measurement requires particolar care and attention to avoid providing wrong test results and causing damages to third parties e before the insulation test prepare the plant adequately by disconnecting everything must not be tested During the insulation test continuously make j sure that the applied voltage is not accessible to third parties e a measurement with a cable disconnected by mistake may provide a good result also in presence of a faulty insulation It s necessary to take all possibile cares to avoid that Once prepared the plant and connected the measuring cables make sure that they are correctly connected In case of doubt bifore performing an insulation test perform a Q 0 2A measurement by short circuiting the cables under test at a point of the plant which is as far as possibile from the measuring clips Remove the short circuit before performing the insulation test Fig 10 Connection of the instrument s terminals during MO test
46. st current value 4 10 1 Anomalous cases which may occur during RCD tests 1 If during measurement a higher input voltage than 265V is detected for example both cables connected to the ni phase conductors of a 400V three nce phases plant the instrument does not perform the test and emits a prolonged sound to signal the anomalous situation 1 C The screen beside is displayed for 5 gt C55 seconds after which the instrument A displays the default screen of RCD test EN 31 IN HT MULTITEST M72 M73 M74 M75 2 If during measurement a lower input voltage than 110V is detected the instrument does not perform the test and emits a prolonged sound to signal the anomalous situation The screen beside is displayed for 5 seconds after which the instrument displays the default screen of RCD test lt ep Rep Wiz LL n ur rr co This can happen for example if the black cable is erroneously connected to the neutral conductor instead of the phase one If a Shuko cable is used rotate the plug and repeat the test 3 If during measurement the green probe is Rep connected to the phase conductor and the black probe is connected to the ni protective conductor the instrument does 1 Lr L not perform the test and emits a min prolonged sound to signal the anomalous situation The screen beside is displayed c REN for 5 seconds after which the instrument ip E displa
47. t control and laboratory use Part 1 General requirements defines what a measurement category usually called overvoltage category is At paragraph 6 7 4 Measuring circuits it says OMISSIS Circuits are divided into the following measurement categories e 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 e Measurement category lll is for measurements performed in the building installation Examples are measurements on distribution boards circuit breakers wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and equipment for industrial use and some other equipment for example stationary motors with permanent connection to fixed installation e Measurement category ll is for measurements performed on circuits directly connected to the low voltage installation Examples are measurements on household appliances portable tools and similar equipment e Measurement category is for measurements performed on circuits not directly connected to MAINS Examples are measurements on circuits not derived from MAINS and specially protected internal MAINS derived circuits In the latter case transient stresses are variable for that reason the norm requires that the transient withstand capability of the equipment is mad
48. that in humid or wet places make sure that humidity is within the limits indicated in section environmental conditions avoid doing that in rooms where explosive gas combustible gas steam or excessive dust is present keep you insulated from the object under test do not touch exposed metal parts such as test lead ends sockets fixing objects circuits etc avoid doing that if you notice anomalous conditions such as breakages deformations fractures leakages of battery liquid blind display etc be particularly careful when measuring voltages exceeding 25V in particular places building yards swimming pools etc and 50V in ordinary places to avoid risks of electrical shocks The following symbols are used CAUTION refer to the instruction manual an improper use may damage the instrument or its components v DC or AC voltage or current A CAUTION for dangerious voltage Risk of electric shock E Meter with double insulation 1 1 PRELIMINARY INSTRUCTIONS e e Se This instrument has been designed for use in environments of pollution degree 2 It can be used for tests on electrical installations of overvoltage category lll 265V and 550V maximum rated interlinked voltage and to earth You are recommended to respect the usual safety regulations aimed at protecting you against dangerous currents and protecting the instrument against improper use Only the original test leads supplied along with the instrum
49. the RCD under test Fig 11 4 Insert the Shuko cable in the input terminals of the instrument 5 Insert the Shuko cable in a socket at the lower end of the RCD under test Fig 11 EN 30 IN HT MULTITEST M72 M73 M74 M75 Keep GO pressed for at least one second to perform the leakage current measurement in phase with the positive semiwave of the network voltage 0 6 or keep GO pressed for at least one second and when the hyphens on the display start disappearing press GO again to perform the measurement with the leakage current in phase with the negative semiwave of the network voltage 180 CAUTION The message Measuring on the display means that the instrument is measuring During this phase never disconnect test leads 7 At the end of the test if the detected Rep Tripping time tripping time is lower than 300ms 40ms for lan 30mA x5 the instrument emits a 1 l double sound to signal the positive d outcome of the test and displays a screen ms like this ATI 0 IAN J LJ mA OK Test current value 8 At the end of the test if the detected Rep Tripping time tripping time is higher than 300ms 40ms exceeding the limit for l4 730mA x5 or in case the RCD does not trip the instrument emits a gt HH prolonged sound to signal the negative a Yas amy MS outcome of the test and displays a screen like this n 0 IAN J Li mA NOT OK Te
50. the test 4 If during measurement an excessive Ra contact voltage is detected higher than 50V the instrument does not perform the 1 test and emits a prolonged sound to nee signal the anomalous situation The screen beside is displayed for 5 seconds after which the instrument displays the L f default screen of Ra test LL EN 35 IN HT MULTITEST M72 M73 M74 M75 5 If during measurement the green probe is Ra connected to the phase conductor and the black probe is connected to the 1 xu gt th NETT protective conductor the instrument does not perform the test and emits a prolonged sound to signal the anomalous situation The screen beside is displayed for 5 seconds after which the instrument ip displays the default screen of Ra L test rr This can happen even if the wrong connection is performed on the back side of the power socket EN 36 IN HT MULTITEST M72 M73 M74 M75 4 12 AUTO AUTOMATIC CYCLE OF MEASUREMENTS TO TEST A PLANT M74 M75 This function permits to test an electrical plant in a completely automatic way without any intervention of the operator CAUTION Testing an RCD involves the tripping of the RCD itself Therefore before taking this measurement make sure that no loads are connected to the RCD under test to avoid damaging them Disconnect all loads connected to the RCD as they could add further leakage curren
51. ts to those moved by the instrument thus nullifying the test results gt Fig 13 Connection of the instrument s terminals during AUTO test 1 Turn on the instrument ay Press the arrow keys to select AUTO N 3 By pressing MODE select the test current among the possible values 30mA PEAK J 30mA x5 100mA 300mA which turn cyclically at each key pressure CAUTION Pay attention when setting the test current of the RCD to make sure that the correct one is selected In case a higher current than the nominal one of the device under test is selected the RCD would be tested at a higher current than the correct one thus favouring a quicker tripping of the RCD itself 4 Insert the black and green cables in the corresponding input terminals of the instrument If necessary insert the alligator clips on the test probes or use the shuko cable 5 Connect the green cable to the protective conductor earth and the black cable to the phase conductor Fig 13 or insert the Shuko cable in a power socket measurements without any intervention of the operator in the following d Keep GO pressed for at least one second the instrument performs 6 sequenze Ra 15mA RCD MO phase to earth EN 37 MULTITEST M72 M73 M74 M75 AN 10 11 CAUTION The message Measuring on the display means that the instrument is measuring During this phase never disconnect test leads
52. urement 1 In order to detect minimum average maximum and peak values of frequency it s necessary to pass to this measuring parameter 2 During AC measurements it s possible to pass to frequency measurement by LPEKK J pressing MODE PEAK for less than 1 second Example of display of frequency value The minimum reading limit of frequency is 30 0Hz Lower input values are displayed as 30 0Hz V AC m pi Frequency value 4 E To resume voltage measurement press MODE PEAK for less than 1 second p MODE To detect the frequency peak value press MODE PEAK for more than 1 L PEK J second see paragraph 4 2 3 c Func To block the detected frequency value on the display press FUNC HOLD for LHOLD less than 1 second see paragraph 4 2 1 7_ Func To detect maximum minimum and average frequency values press FUNC HOLD EN 10 HOLD for more than 1 second see paragraph 4 2 2 NHT MULTITEST M72 M73 M74 M75 4 3 2 Anomalous cases which may occur during V Hz measurements 1 The maximum voltage is 550 10 V If the detected voltage value exceeds 605V TRMS the instrument displays the screen beside Disconnect immediately the instrument from the circuit under test to avoid electrical shocks and damages to the instrument input If during a voltage measurement the detected frequency value exceeds 400Hz the instrument displays the screen beside
53. voltage category Indoor usage maximum height 6 1 3 General specifications Mechanical features Dimensions Weight batteries included Power supply Battery type Low battery indication Battery life Display Features 6 2 ENVIRONMENT 6 2 1 Environmental conditions Reference temperature Working temperature Relative humidity allowed Storage temperature Storage humidity 6 2 2 EMC ADC 16 bit TRMS True Root Mean Square 64 times per second 2 times per second EN61010 1 EN61557 Class 2 double insulation 2 2000m indoor use CAT III 550V phase to earth CAT III 550V phase to phase 2000m 240 L x 100 W x 45 H mm approx 630g 4 batteries 1 5 V LR6 AA AM3 MN 1500 the symbol z is displayed when the battery voltage is too low Multimeter About 90 hours gt 1000 tests LAN gt 1000 tests Q 0 2A gt 1000 tests 10 MO gt 1000 tests 480kQ 500VDC RCD gt 1000 tests Ra amp 1000 tests AUTO gt 1000 tests 4 LCD with max reading 9999 counts symbol and decimal point 23 5 C 0 C 40 C lt 70 10 60 C lt 70 This product conforms to the prescriptions of the European directive on low voltage 73 23 EEC LVD and to EMC directive 89 336 EEC amended by 93 68 EEC 6 3 ACCESSORIES Please see enclosed packing list EN 42 IN HT MULTITEST M72 M73 M74 M75 7 SERVICE 7 1 WARRANTY CONDITIONS This instrum
54. ys the default screen of RCD test 4 If during measurement an excessive Rep contact voltage is detected higher than 50V the instrument does not perform the ni test and emits a prolonged sound to nee UA uU signal the anomalous situation The screen beside is displayed for 5 seconds after which the instrument displays the Mb default screen of RCD test ub 5 If during measurement an excessive Rep earth resistance is detected such to prevent the instrument from generatine the test current the instrument does not 1 perform the test and emits a prolonged sound to signal the anomalous situation The screen beside is displayed for 5 rr seconds after which the instrument L shows the default screen related to RCD A test EN 32 ANY HT MULTITEST M72 M73 M74 M75 4 11 RAL MEASUREMENT OF GLOBAL EARTH RESISTANCE M73 M74 M75 CAUTION Disconnect all loads connected to the lower end of the RCD as they could introduce additional leakage currents thus nullifying the test results Is possible to N perform measurement on plants whose phase to earth rated voltage is up to 265V Do not use the instrument on plants whose interlinked rated voltage is higher than 550V Fig 12 Connection of the instrument s terminals during Rat test 1 Turn on the instrument 2 AN Press the arrow keys to select Ra L 3 By pressing MODE select the test current among the possible values 15mA PEAK jJ and 10
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