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Manual - Martindale Electric

1. instrument generated 1 07wo Duration of the Test the Nominal test Voltage the instrument 514V 15s Test mode emits a double sound ipu ae signal indicating the MAN 500v Test voltage set positive outcome of the test and displays FUNC VNOM one screen similar to the screen alongside In order to evaluate the test you must compare the result with the limits indicated in the Guidelines see Tablet e The displayed result can be stored pressing the SAVE key twice according to paragraph 9 1 c amp fthe Insulation MOQ 05 06 01 Maximum resistance value resistance is higher which can be measured 9990 is displayed if a than Rmax see Table2 rated voltage of 500V was the instrument emits a gt 999 mQ selected see Table2 double sound signal at N the end of the test The symbol gt means that indicating the positive the resistance value is outcome of the test 523V 15s higher than Rmax and displays one screen ONE alongside FUNC VNOM ea The displayed result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 22 of 131 VR2250 6 2 3 Results of TMR mode Atthe end of the test if the Insulation resistance is lower than Rmax see Table2 and the instrument generated the Nominal test Voltage the instrument emits a double sound signal indicating the positive outcome of the te
2. Instrument connection for P PE in a 400V three phase system without Neutral conductor 3 Connect the mains plug into a 230V 50Hz socket or the crocodiles to the conductors of the three phase system see previous pictures 4 The key F4 permits to select one of the following limit values for the contact voltage which can be shown cyclically when pressing the key 50V default v 25V 5 Press the START key once to execute a test injecting a current in phase with ositive half wave of the voltage Press the START key twice to execute a test injecting a current in phase with negative half wave of the voltage CAUTION The P PE measurement in a 230V System makes a test current of 6A approx This may cause the tripping of magnetic protection switch with nominal value lower than 10A and will cause the tripping of RCD device If necessary perform the test upstream of the switch or RCD Page 41 of 131 VR2250 CAUTION Never disconnect the test leads when the message MEASURING is displayed Atthe end of the test the instrument emits a double sound signal LOOP CERNE Value of phase to Earth indicating that the test Resistance expressed in Q is correctly terminated and 1 070 Value of the phase to Earth displays the values 215A prospective short circuit alongside current expressed in Ampere i Freq 50 0HZ calculated according to the VP N 231V Vp PE 231V following formu
3. ms installation screen alongside is displayed FRO 50 0Hz Ut V VP N OV Vp PE OV when pressing START Ay LOW VOLTAGE NO VOLTAGE Detected xl 30mA 50V FUNC IdN RCD UL Should the instrument RCD 05 06 01 detect a voltage between phase and neutral higher of 250V ms for example in case the black cable is connected FRO 50 0Hz Ut V VP N 401V VP PE 230V to an installation phase conductor of a 400V MEE EERE 15151 VOLTAGE Detected three phase system the xl 30mA 50V screen alongside is FUNC lran RCD JUL displayed Page 33 of 131 VR2250 This screen is displayed when the phase conductor has been reverseded with the neutral one The instrument does not perform the test Exchange the red cable with the black one Repeat the test This screen is displayed when the phase conductor has been exchanged with the Protection Conductors The instrument does not perform the test Reverse the phase to earth connection in the plug or exchange the red cable with the green one This screen is displayed when in a 230V Phase to Phase System the black conductor was reversed with respect to the green one The instrument does not perform the test Reverse the black and green conductors RCD 05 06 01 ms FRQ 50 0Hz Ut V VP N 231V VP PE OV A CHANGE PON Phase and Neut
4. lt 1 gt 9 Rotary switch of the instrument 1 2 PRELIMINARY INSTRUCTION This instrument has been designed for use in environments with a pollution level 2 and up to and no more than 2000 meters altitude t can be used for Safety Test on Installation with Over voltage Category Ill 300V phase to earth and for voltage and current measurements on installations with over voltage category Ill 600 V phase to phase 300 V phase to earth or CATII 350 V phase to earth Page 5 of 131 VR2250 Please keep to the usual safety standards aimed at Protecting against dangerous currents Protecting the instrument against incorrect operations Only the accessories supplied with the instrument guarantee compliance with the safety standards Accordingly they must be in good condition and if necessary they must be replaced with identical models Do not take measurements on circuits exceeding the specified current and voltage limits Before connecting cables crocodiles and clamps to the circuit under test make sure that the right function has been selected Do not take any measurements under environmental conditions beyond the limits specified in paragraph 14 4 Check that batteries are not weak and inserted correctly Before connecting test leads to the circuit under test check that rotary switch position is correct eS Se 1 3 DURING USE Please read carefully the following recommendations and instr
5. sese tentent tenen ntentnntenntentenns 52 6 5 9 2 W 7 9 W and p faulty CASES eco rect ER ter e ER RR RR ER tt eR ee Den ederent enda 53 Page 2 of 131 VR2250 7 AUX MEASUREMENT WITH EXTERNAL PROBES eese eene nnne tete tntn tnn tn intus 56 7 1 ENVIRONMENTAL PARAMETER AND LEAKAGE CURRENT REAL TIME MEASUREMENT 57 7 2 ENVIRONMENTAL PARAMETER AND LEAKAGE CURRENT RECORDING sees 59 72 1 AUX Basic set ng RECORDER GONEIG 5 2 52 eei eet teet eet bt rt i ote ted 59 7 2 2 RECORDING setting of Typical Configurations sese tentent terere tentent teret ntnnd 61 9 ANALYSER ooid i erii De darned ais a a Va iSucus cose dece a aidLetus eu icc atusoS d eda 69 8 1 Basic Setting ANALYSER CONFIG iaar nerne a a ea tente tte tret tenente ttes 63 8 1 1 Type of electrical system under test ssssssessseseeeente tentent tentent tentent tnnt nte tette ttnnd 63 8 1 2 How to set the fundamental frequency sse nennen tette retener tete ttnnd 63 8 1 3 How to set the current range tne bebe irm tor tsi ee scire M Eee ceaseaatbbiesy 63 8 1 4 Clamp PL S 63 8 1 5 How to set the value of the transformer voltage ratio TV RATIO sssssesee eterne tentent 63 8 1 6 How to enable disable the password sse tentent tentent tnter tereti teret ttnnd 64 8 2
6. Table 3 Table of tripping times for tests with leakage currents lan x1 lan X2 lan x5 and AUTO Table of tripping times for ramp tests ual This test should not be used to compare the RCD tripping time at the tripping current while the standards refer to the maximum tripping times in case the RCD is checked with a leakage current equal to the rated current The limit values for the tripping current are indicated in the following Table RCDType iws10mA Iw gt 10mA A 1 4 x lan 1 4 x lan AC JAN lan Table 4 Current limit value for Ramp Test Page 27 of 131 6 3 2 Measurement procedure GG F3 F4 VR2250 1 Select the desired test parameter by means of the F1 F2 F3 F4 key 2 Connect the Red Green and Black connectors of the three terminal mains cable or of the split cables to the corresponding input terminals of the instrument B1 B3 B4 AAB B4 Red Acren Em RM Instrument connection for 230V single phase Black RCD check Rr Instrument connection for 400V N PE three phase RCD check Instrument connection for 400V N no PE three phase RCD check Instrument connection for 400V PE no N three phase RCD check one of the diagrams above 3 Connect the mains plug or the Test leads to the System under test according to Page 28 of 131 VR2250 6 3 2 1 Results of x 2 mode 4 Press the START key once to execu
7. Note It is to be noted that the expression of the phase Reactive Power with non sine waveforms would be wrong To understand this it may be useful to consider that both the presence of harmonics and the presence of reactive power produce among other effects an increase of line power losses due to the increased current RMS value With the above given relation the increasing of power losses due to harmonics is added to that introduced by the presence of reactive power In effect even if the two phenomena contribute together to the increase of power losses in line it is not true in general that these causes of the power losses are in phase between each other and therefore that can be added one to the other mathematically The above given relation is justified by the relative simplicity of calculation of the same and by the relative discrepancy between the value obtained using this relation and the true value It is to be noted moreover how in case of an electric installation with harmonics another parameter called distorted Power Factor dPF is defined In practice this parameter represents the theoretical limit value that can be reached for Power Factor if all the harmonics could be eliminated from the electric installation Page 125 of 131 VR2250 16 12 1 Conventions on powers and power factors As for the recognition of the type of reactive power of the type of power factor and of the direction of the active power the be
8. RcauiBRATION RuEAsuRED the instrument displays A 0 000 the screen alongside ATTENTION R R RcaLigRATION gt RmEAsuRED 0 000 0 000 219mA 219mA AUTO 0 110 FUNC CAL THE PREVIOUS RESULTS CANNOT BE SAVED e f the value of Mee 05 06 01 Resistance value higher Resistance is higher than 50 than 5Q but lower than A 5 170 p d 99 9 the instrument emits a long sound R R signal and displays one V current screen similar to the screen alongside AUTO 0 11Q FUNC CAL e The displayed result can be stored pressing the SAVE key twice according to paragraph 9 1 ea the value of Resistance value higher Resistance is higher T Em 99 90 than 99 90 the instrument emits along A gt 99 9 ATTENTION Value of sound signal and Resistance Out of Range displays the screen EU ban alongside mA mA AUTO 0 110 FUNC CAL e The displayed result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 19 of 131 VR2250 6 2 MQ INSULATION RESISTANCE MEASUREMENT WITH 50V 100V 250V 500V 1000V TEST VOLTAGE These measurement comply with IEC 61557 2 and VDE 0413 part 1 CAUTION Before affecting the insulation test make sure that the circuit under test is not energised and all the loads are disconnected A ba Turn the switch to the MQ position D V A The key F1 permi
9. Y AUTOMATICALLY If the operator has pressed START STOP the instrument will remain in stand by until the date and time previously set then the recording will start While if the operator doesn t press START STOP the recording will never start CAUTION For recordings we recommend to use the external power supply adapter optional code MAR even the instrument allows the operator to perform a recording using internal batteries If you press Start a recording without the external power supply adapter optional code MAR the instrument will display a warning message No ext supply Press START key again to run the recording or press ESC to quit If during a recording the external power supply adapter optional code MAR is de energised the instrument will continue the recording using the internal battery power until the batteries are exhausted the data stored until the definitive turning off won t get lost For this we recommend you ALWAYS insert a new set of batteries before a long recording The instrument uses sophisticated algorithms to prolong the battery life Particularly Y The instrument switches OFF the backlight automatically after 5 seconds v lf the Battery level is too low the Backlight function will be disabled v f the instrument is just displaying in real time and the external power supply is not connected after about 5 minutes from the last key pressure or switch rotation the instrument turns off a
10. if the RCD tripping time is higher than the limit the instrument emits a long sound signal at the end of the test and displays the values alongside During the ramp all test if the RCD tripping current is higher than lan Type AC or 1 4 lan Type A with l4 210mA or 2 lan Type A with lan lt 10mA the instrument emits a long sound signal at the end of the test and displays the values alongside The previous results can be stored pressing the SAVE key twice according to paragraph 9 1 27mA gt 300ms Freq 50 0Hz Ut 1V d VP N 231V Vp PE 230V Tripping Time exceeding Al 30mA 50V limit value FUNC IdN RCD JUL Maximum current RCD 05 06 01 generated by the instrument during the test for general RCDs the value indicated is referred A gt 4 2 mA to an AC type 30mA RCD ee in this case the maximum FRQ 50 0Hz Ut 1V current supplied is equal to VP N 231V VP PE 230V 1 4xlaN A 30mA 50V FUNC RCD JUL Page 37 of 131 A CURRENT NOT OK Led ATTENTION The RCD tripping current is higher than the Nominal Value laN 30mA was set in the example VR2250 6 4 LOOP MEASUREMENT OF LINE IMPEDANCE FAULT LOOP IMPEDANCE PROSPECTIVE SHORT CIRCUIT CURRENT CALCULATION AND PHASE SEQUENCE INDICATOR A a ae Turn the switch on LOOP position P V e The F1 key permits to select one of the following measuring modes M
11. 4 Press the START key The instrument starts the test Atthe end of the test the instrument emits a double sound signal PARIH ees Earth Resistivity value indicating that the expressed in Qm test is correctly terminated and 1 77am yog value of electrical displays the values noise alongside Test 04 ___ Number of test pAVG 0 74Q 0 Average Value of Earth Resistivity calculated over the p DIST 2m Number of tests displayed FUNC CLR 7 U p Working mode 5 The instrument will show automatically the average value of the Earth Resistivity calculate over the tests performed Press F2 to RESET this value and the number of Test e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 52 of 131 VR2250 6 5 3 2 W 3 W and p faulty cases cg If the instrument detects the External Power supply adapter connected to the instrument it will show the message displayed along side If the Instrument detects a voltage value higher than 5V the instrument will show the screen displayed alongside The message Rc high indicates that the instrument cannot flow the minimum current necessary for measurement Check that the terminals are correctly connected and the Auxiliary earth rod connected to B4 black conductor has not been inserted in a pebbly or poor conductive ground If necessary pour some
12. Erc1 Capacitive reactive Energy Tab 4 Symbols used in the position ENERGY The symbols i and c stand for reactive powers Q and energies Er inductive and capacitive respectively Page 83 of 131 VR2250 8 7 2 METER mode In this mode the instrument shows the below screens according to the settings made as per paragraph 8 1 27 09 00 T75 235 12 ENERGY SINGLE PHASE Eal 0 000 kWh Erc1 0 000 kVARh Eril 0 000 kVARh P1 2 36 38 kW Q1 6 375 kVAR S1 36 94 KVA dpf1 0 98 i Meas Time 00 00 00 MEAS PG PG Example of screen The symbols used are described in Tab 4 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Following keys are enabled ce q F2 F3 F4 SAVE ENTER HOLD MENU START STOP to start stop immediately a direct energy measurement The energy counters will start increasing proportionally to the active power absorbed by the load The results obtained cannot be memorised If the active power is negative the counters will not increase to pass to previous next function respectively to save in the instrument memory a record of Smp type see paragraph 9 2 containing the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording to enable disable the HOLD function updating interruption of the displayed data All the previous functions remain h
13. SAVE ENTER HOLD MENU START STOP to move the cursor of the selected harmonic leftwards and rightwards respectively At the same time the values relevant to the order no of the selected harmonic and to the corresponding absolute and relative values calculated on the basis of the fundamental are updated to display the page of the harmonics h01 h24 symbol h24 or that of the harmonics h25 h49 symbol h49 to return back to METER mode see paragraph 8 4 2 to save in the instrument memory a record of Smp type see paragraph 9 2 and the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording to enable disable the HOLD function updating interruption of the displayed data All the previous functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled its not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement to record selected parameters according to the instrument s settings see chapter 10 Page 74 of 131 VR2250 8 4 4 WAVE mode Selecting the WAVE mode the screen below will be displayed according to the settings made as per
14. avg and max values in the definitive memory Therefore if an integration period of 15 minutes has been set the recording will continue for about 15 minutes before producing a series of recorded values If the recording is interrupted before the selected integration period has completely elapsed the data stored in the temporary memory will not be elaborated and the corresponding series of values won t be transferred to the definitive memory 10 2 2 Typical Configurations To activate the Typical Configurations follow this procedure 1 Turn the rotary switch to ANALYSER 2 Press MENU key followed by F1 F2 to navigate to the following screen MENU GENERAL SAFETY TEST MEMORY ANALYZER MEMORY RESET ANALYZER CONFIG RECORDER CONFIG CONTRAST DATE amp TIME LANGUAGE l d 3 Press MENU key again The instrument displays a screen as shown below picture on the left This way it is possible to select the desired configuration with F1 or F2 key TYPICAL CONFIG TYPICAL CONFIG EN50160 EN50160 SURGES amp DIPS SURGES amp DIPS START UP START UP POWER amp ENERGY POWER amp ENERGY i dE 4 T Configuration selection Confirmation configuration selection 4 Press ENTER key The instrument displays the message Data saved for a while to confirm the desired configuration see above on the right The instrument will return to the measure mode Page 90 of 13
15. e the boiler with the washing purpose of machine with separating this the purpose from the of installation separating this from the installation FM socket Insulation measurements on an installation A procedure indicating how to perform the insulation resistance measurement on an installation is reported in the following table Page 109 of 131 VR2250 Procedure for insulation resistance measurement referred to the previous picture Turn the switch A p LM Se R Rume OK end of the test D and E off A Se R lt Rumite Proceed 2 Se R gt Rumite Proceed 3 Perform the Turn the switch B INSTALLATION h 2 off on QS NE es Re Pian NOT COMPLYING WITH STANDARDS Perform the Se R Rumite OK end of the test 3 measurement on switch S R lt Burg Proceed 4 Se R gt Rume Proceed 7 5 Perform the Turn the switch C amp INSTALLATION 4 h off TISRRUSIT Y ON PARER SUR iire NOT COMPLYING WITH STANDARDS Perform the Se R 2 Rume OK end of the test 5 t itch e INSTALLATION Mao ML CT NOT COMPLYING Pop TH STANDARDS j Tabled Table with procedure steps for insulation measurement referred to the installation reported in Insulation measurements on an installation Note The switches D and E are those installed near the load having the purpose of separating it from the installation In case the above said RCDs do not exist it is necessary t
16. 0 If the RCD passed the test it must trip and the instrument shows the message RESUME RCD The operator shall resume the RCD For a Selective RCD a 60 seconds timer starts before executing the next test d The instrument performs the test at lan 180 Follow the same procedure as described under c e The instrument performs the test at 5lan 0 Follow the same procedure as described under c f The instrument performs the test at 5lan 180 Follow the same procedure as described under c The test is completed The F4 key permits to select one of the following limit values for the contact voltage which can be shown cyclically when pressing the key 50V default 25V CAUTION Never disconnect the test leads when the message MEASURING is displayed Page 26 of 131 VR2250 6 3 1 Tripping times for the general and selective RCDs Table of tripping times for lan x1 lan X2 lay X5 and AUTO tests If the parameters set on the instrument comply with the type of RCD under test and if the latter works properly the test x1 x2 and x5 SHALL cause the RCD tripping within the times shown in the following table General 0 3s 0 15s 0 04s Max tripping time in seconds Max tripping time in seconds 0 13s 0 05s 0 05s Minimum tripping time in seconds For rated values IAN lt 30mA the test current at five times is 0 25A For currents equal to 1 2 lan the RCD shall not trip in any case
17. 4 1 DISPLAY DESCRIPTION The display is a graphic module with a resolution of 128 x 128 pixels The first line of the display shows the date and time If not correct you can set these according to the procedure described at paragraph 5 2 On the top right corner of the display you can always see the battery indicator and if the external power supply adapter optional code MAR is connected the corresponding symbol LOWQ 05 06 01 27 09 00 T 35 12 er SINGLE PHASE VOLTAGE Pese vi Vpk1 R R Thdv Q Loc freq mA mA AUTO 0 110 FUNC CAL HARM WAVE These symbols will be omitted in the following illustrations 4 2 INITIAL SCREEN When turning on the instrument by pressing ON OFF this screen will appear for a few seconds Veritest 2250 MARTINDALE SN 00000000 V X XX BAUD RATE 57600 CALIBRATION DATE 01 01 06 Here you can see Serial number of the instrument SN Firmware software release V X XX transmission speed through serial RS232 Baud Rate Calibration date CALIBRATION 4 3 BACKLIGHT FUNCTION When instrument is turned on pressing briefly the ON button the backlight will be enabled The light will be automatically turned off after 5 seconds If the batteries are too low the instrument will disable automatically the backlight function Page 11 of 131 VR2250 5 INITIAL SETTINGS By pressing the MENU key the following screen will be
18. 61557 2 and VDE 0413 part 4 CAUTION Before carrying out the continuity test make sure that there is no voltage at the ends of the conductor under test Turn the switch to the LOW Q position This key permits you to select one of the following measuring modes Se Mode AUTO the instrument carries out two measurements with reversed polarity and displays their average value This mode is recommended for the continuity test Mode RT measurement with positive polarity and possibility of setting the duration time of the test In this case the operator can set a measuring time long enough to permit him to move the protective conductors while the instrument is carrying out the test so detecting any bad connection Mode RT measurement with negative polarity and possibility of setting the duration time of the test In this case the operator can set a measuring time long enough to permit him to move the protective conductors while the instrument is carrying out the test so detecting any bad connection This key permits to execute the CAL mode compensation of the resistance of the cables used for the measurement CAUTION If the resistance is lower than 5 including the resistance of the calibration the continuity test is executed by the instrument with a test current higher than 200mA If the resistance is higher than 5Q the continuity test is executed by the instrument with a current lower than 200mA We rec
19. Earth resistance measurement without RCD tripping and calculation of prospective short circuit current Indication of phase rotation sequence EARTH Measurement of Earth Resistance and Resistivity using Earth rods AUX Measurement and Recording of leakage current using flexible clamp ANALYSER The Instrument allows the following operations Y Display in real time the electrical parameters of a single phase systems and the harmonic analysis of voltage and current Y Conduct a direct Energy measurement without memorizing Y Memorize pressing SAVE key the sampled values of the Parameters present at instrument input generating a Smp record inside instrument memory It will be possible to analyse the memorized data ONLY by transferring the data to a PC Y Record simultaneously pressing the START key after a proper setting RMS values of voltage current corresponding harmonics active reactive and apparent powers power factors and cosq active reactive and apparent energies voltage anomalies voltage sag and surge with 10ms resolution It will be possible to analyse the recorded data ONLY by transferring the data to a PC CAUTION Please note the difference between memorize and record These terms will be used repeatealy in this manual Please focus on their definitions and distinctions Page 7 of 131 VR2250 3 PREPARATION FOR USE 3 1 INITIAL CONTROL This instrument has been checked mechanically and ele
20. Input Impedance 15 310V 0 2V 300k Phase Pus eutral 30 600V 0 4V 10ms 1 2 period 1 0 Reading 2digit 10ms period oooh hase ase CURRENT MEASUREMENT SINGLE PHASE SYSTEM AUTORANGE Range V Resolution mV Accuracy Input Impedance Overload Protection 0 005 0 26V 0 1 y 0 26 1V 04 0 5 Reading 2digit 200kQ 5V Example with a 1000A 1V full scale clamp the instrument detect only current higher than 5A POWER MEASUREMENT SINGLE PHASE SYSTEM AUTORANGE Quantity Range Accuracy Resolution 0 999 9W 0 1W 1 999 9kW 0 1kW ACTIVE POWER 1 999 9MW 0 1MW 1000 9999MW 1MW 0 999 9VAR 0 1VAR 1 999 9kVAR 0 1kVAR REDO TIVE ROWER 1 999 9MVAR 0 1MVAR 1000 9999MVAR 1MVAR 0 999 9VA 0 1VA 1 999 9kVA 0 1kVA APPARENT POWER 1 999 9MVA 1 0 Reading 2digit 0 1MVA 1000 9999MVA 1MVA 0 999 9Wh 0 1Wh ACTIVE ENERGY 1 999 9kWh 0 1kWh Classe2 EN61036 1 999 9MWh 0 1MWh 1000 9999MWh 1MWh 0 999 9VARh 0 1VARh REACTIVE ENERGY 1 999 9kVARh 0 1kVARh Classe3 IEC 1268 1 999 9MVARh 0 1MVARh 1000 9999MVARh 1MVARh Cos 9 MEASUREMENT SINGLE PHASE SYSTEM Cos 9 Resolution Accuracy 0 20 0 6 0 50 0 01 0 7 0 80 1 0 VOLTAGE AND CURRENT HARMONICS MEASUREMENT SINGLE PHASE SYSTEM Range Accuracy Resolution DC 25H 5 2 digit 26H 38H 10 2 digit 0 1V 0 1A 34H 49H 15 2 digit Harmonics values are null under fixed threshold DC its values are null
21. Q double sound signal 1 0 7 indicating that the test E Q Nauwe of the phase to neutral is correctly ER prospective short circuit terminated and current expressed in Ampere FRQ 50 0HZ calculated according to the displays the values VP N 231V VP PE 231V following formula alongside ae P N Working mode FUNC Z2Q Formula for calculation of prospective short circuit current U I S Z pn Where Un Nominal phase to neutral voltage 127 if Vmeas lt 150 230 if 150V lt Vineas lt 250 e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 39 of 131 VR2250 6 4 3 Measurement procedure and results of P P mode 1 Select P P mode by means of the F1 key 2 Connect the Red Green and Black connectors of the three terminal mains cable or of the split cables to the corresponding input terminals of the instrument B1 B3 B4 Instrument connection for P P test in a 400V three phase system 3 Connect the mains plug into a 230V 50Hz socket or the crocodiles to the conductors of the three phase system see previous pictures 4 f possible disconnect all low impedance loads downstream the point at which the measurement is to be taken as such impedance would be in parallel with Rer the line impedance to be measured 5 Press the START key The instrument starts the test CAUTION The P P measurements in a 400V system make a test current of 11 5A appro
22. The GENIUS5080E is able to record as voltage anomalies all those rms values calculated every 10ms beyond the percent thresholds of Voltage Reference Vref set during the programming from 396 to 30 96 with step of 1 The Reference must be set to Nominal Voltage Phase to Neutral for Single Phase and 4 wire three phase system Nominal Voltage Phase to Phase for 3 wire three phase system Example1 Three Phase System 3 wires Example2 Three Phase System 4 wires Vref 400V LIM 6 LIM 10 gt Vref 230V LIM 6 LIM 10 gt High Lim 400 x 1 6 100 424 0V High Lim 230 x 1 6 100 243 08V Low Lim 400 x 1 10 100 360 Low Lim 230 x 1 10 100 207 0V The Instrument will detect Voltage anomalies if the RMS Voltage Values calculated every 10ms beyond the above calculated thresholds These limits remain unchanged throughout the recording period When a Voltage anomaly occurs the instrument records e The number corresponding to the phase where the anomaly occurred e The direction of the anomaly UP and DN identify respectively voltage drops sag and peaks Surge e The date and time of the beginning of the event in the form day month year hour minutes seconds hundredths of second e The duration of the event in seconds with a resolution of 10ms e The minimum or maximum value of voltage during the event 16 11 VOLTAGE AND CURRENT HARMONICS 16 11 1 Theory Any periodical non
23. U screen alongside x5 20ms 30ms detected referred to the relative to the last L rated value of the RCD FRQ 50 Hz Ut 1V current set measurement VP N 231V VP PE 231V performed OC OK RCD passed the test AUTO 30mA 50V FUNC IdN SOMIT Contact Voltage Limit value Working mode RCD nominal current RCD type ea The test can be stored pressing the SAVE key twice according to paragraph 9 1 Page 30 of 131 VR2250 6 3 2 4 Results of RAMP all mode 4 Pressthe START key once to execute a test with 0 Current waveform Or Press the START key once to execute a test with 180 Current waveform The instrument generates a leakage current growing step by step for a given time interval CAUTION Never disconnect the test leads when the message MEASURING is displayed Atthe end of the test if Tripping Current the RCD tripping current is lower than lan Type AC or 1 4lan Type A Tripping time expressed in milliseconds with lan gt 10mA or 2lan Type A with lan lt 10mA 2 7mA Value of contact voltage U the instrument emits a Soms detected referred to the double sound signal FRQ 50 0Hz Ut 1V rated value of the RCD indicating the positive VP N 231V VP PE 231V current set outcome of the test and displays the screen OK RCD passed the test alongside a 30a nia M FUNC IdN RCD Contact Voltage Limit value Working mode RCD nominal curre
24. V gt 500V EN60439 Electrical panel boards 230 400V 500VDC gt 230kQ EN60204 Electrical equipment of machines 500VDC gt 1MQ Table Table for test voltages and the corresponding limit values for reference 50VDC 99 9MQ 100VDC 199 9MQ 250VDC 499MQ 500VDC 999MQ 1000VDC 1999MO Table2 Table of maximum resistance values which can be measured under MQ mode depending on the rated voltage selected 6 If the TMR mode was selected use the F3 F4 keys to set the duration time of the test CAUTION Never disconnect the test leads from the circuit under test when the message MEASURING is displayed as the circuit under test may remain charged at a dangerous voltage The instrument has an internal safety resistor which is connected to output terminal before end of test in order to discharge the parasite capacities of the installation START STOP 7 Press the START key The instrument will start the test Y MAN Mode The test will take 4 seconds maximum If you keep the START key pressed longer than 4 seconds the test continue until the key is released Y TMR mode The test will take the time set If you want to stop the test when it s running press the START STOP key again Page 21 of 131 VR2250 6 2 2 Results of MAN mode Atthe end of the test if MQ 05 06 01 Insulation Resistance the Insulation resistance is lower than Rmax see Table2 and the Voltage during the Test A
25. current Furthermore the instrument calculates and displays the value of the active reactive and apparent power and the value of the power factors and coso 8 6 1 Symbols The position POWER has two working modes v METER v WAVE For voltage and current harmonics see paragraphs 8 4 3 and 8 5 3 respectively These modes will be described in detail in the next paragraphs The symbols used are described below Symbol Description V1 Voltage RMS value freq Network frequency I Current RMS value P1 Active power Q1 Reactive power S1 Apparent power Pf Power factor dpf1 coso Tab 3 Symbols used in the position POWER The symbols i and c stand for reactive powers Q power factors Pf and cos dpf respectively inductive and capacitive Page 80 of 131 VR2250 8 6 2 METER mode In this mode the instrument shows the below screen according to the settings made as per paragraph 8 1 27 09 00 17 35 12 POWER SINGLE PHASE vil 230 0 V I1 145 3 A P1 32 91 kW Q1 5 767 kVAR S1 33 41 kVA pfl 0 99 i dpfi 0 99 i WAVE PG PG Example of screen The symbols used are described in Tab 3 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Following keys are enabled ce ce Se F2 F3 F4 SAVE ENTER HOLD MENU START STOP to pass to WAVE mode see paragraph 8 6 3 to pass to previous next fun
26. eese tenente nete tete tnntn inteso tatnen tnus 98 13 MAINTENANCE E P 99 13 1 General Istr Ctioni i cto eo erp tie re n Pad eg Dr ete tele PD RID i e en 99 13 2 Battery Heplaceimerit 3 3 oae i o n cette e std ha a T ieee 99 13 3 Instrument Cl aning iu octets titre a te i n n pcr net deter te t ene dn 99 T9 End orlife a er ede d dae LR s 99 Page 3 of 131 VR2250 T4 TECHNICAL SPECIFICATIONS 2 cs conuat aue nune Yu ecd rcnt aux Lus cann aeina iaaiaee 100 14 1 Technical Features 5 1 x 2 1t n ete Iri e d t ed n erede ain 100 14 1 1 Safety Test f rictionis io ete e e EDD Tea ce epe ee ieee 100 14 4 2 ANALYSER arid AUX f nctions a i ED Pe BE Die ERR ER RE utem E Ces Cho 102 14 2 Standards 5 n oa Erie de ede e ERE P a ec e e E E Debe br ded a ee da e 108 EAE E 103 EMEN M 103 T4232 ANALYSER costs eee cote oett idee re E Pe rhet Reed qtue astu E eve ege E 110 ILE Dp T 103 14 3 GeneralSpecifiCations 5 cet rete dere m e ne nth eret egeo e tu tee ipe de D 104 14 944 Mechanical Dalai ro rte tese re tec tociens andthe senna sc MT se M Ness vent s eee ners 104 IER den PL 104 DEDUCI M 104 IAE MG MONY sce DA 104 144 ENVIRONMENT cc tt i rt
27. function to be used to display voltage and corresponding harmonics see paragraph 8 4 CURRENT function to be used to display current and corresponding harmonics see paragraph 8 5 POWER function it permits to display all the parameters measurable by the instrument voltage current active reactive and apparent power power factor coso and energy see paragraph 8 6 ENERGY function to be used to display active reactive and apparent power power factor cos and energy see paragraph 8 7 More practically we may schematise the right procedure of use for the ANALYSER function as follows Check and eventually modify the ANALYZER CONFIG settings of the instrument Using F3 and F4 select the type of measurement to be taken Connect the instrument to the electrical system to be tested Evaluate the values of the parameters under test If you want to record a Decide what to record b Press MENU and check if the RECORDER CONFIG settings meet your requirements C Consider Typical Configuration recording see paragraph 10 2 6 Connect the External Power Supply MAR optional 7 Start the recording by pressing START STOP pls po m c 8 4 VOLTAGE FUNCTION Y This function permits you to display in real time the RMS value of AC DC voltage the peak the Thd value see paragraph REF Ref530398168 r h 16 11 the waveform and the harmonic spectrum of the voltage 8 4 1 Symbols The VOLTAGE posi
28. or R 5Q is detected the instrument emits a 1 070 Test current double sound signal indicating the positive Duration of the Test outcome of the test and SES displays one screen similar to the screen alongside RT 0 110 TIME 10s FUNC CAL T al Note We recommend that crocodile clips are used to attain a good contact with the conductor under test Indeed in this test the instrument gives as final result the maximum measured value of R or R and using test leads instead of crocodile clips could give you a faulty result due to a faulty contact between the test leads and conductor under test The displayed result can be stored pressing the SAVE key twice according to e paragraph 9 1 6 1 5 AUTO RT RT faulty cases fthe instrument detects the External Power supply adapter connected to the Q Disconnect the External instrument will display Power Supply Adapter j R R the screen along side our Nu mA mA AO REMOVE POWER AUTO 0 110 FUNC CAL fthe terminal voltage is LOWQ 05 06 01 higher than 15V the instrument does not E 0 carry out the test and ATTENTION the test was displays the screen R R not performed because of alongside for 5 seconds Q Q voltage at the terminal ne CURA ends A VOLT IN INPUT AUTO 0 110 FUNC CAL Page 18 of 131 VR2250 In case that LOWQ 05 06 01
29. out with a current of at least 0 2A and an open circuit voltage ranging from 4 V to 24 V The resistance values can be calculated according to the sections and lengths of the conductors under test anyway if the instrument detects values of some ohm the test can be considered as passed 16 2 Insulation Resistance Measurement of the Electrical Installations 250Vdc 500Vdc 1000Vdc PURPOSE OF THE TEST Check that the insulation resistance of the installation complies with the requirements of standards CEI 64 8 6 NOTA This test is to be performed on an open circuit with any load disconnected INSTALLATION PARTS TO BE CHECKED a Between each active conductor and the earth the neutral conductor is considered an active conductor except in the case of TN C systems where it is considered part of the earth PEN During this measurement all active conductors can be connected to each other in case the measurement result does not fall within the standard limits the test is to be repeated for each single conductor b Among active conductors The standard CEI 64 8 6 recommends checking the insulation among the active conductors when this is possible ATTENTION Page 108 of 131 VR2250 ee EXAMPLE OF INSULATION MEASUREMENT ON AN INSTALLATION Panel meter Switch A Switch B Equalising potential Node MARVR2250 d E Switch D near i
30. paragraph 8 1 The screen shows the waveform of the voltage 27 09 00 pier hoses p Example of screen The symbols used are described in Tab 1 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Following keys are enabled ESC to return back to METER mode see paragraph 8 4 2 SAVE to save in the instrument memory a record of Smp type see paragraph 9 2 containing the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording ENTER HOLD to enable disable the HOLD function updating interruption of the displayed data All the previous functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement MENU to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement START STOP to record selected parameters according to the instrument s settings see chapter 10 Page 75 of 131 VR2250 8 5 CURRENT FUNCTION This function permits to display in real time the RMS value of AC DC current the peak the Thdl value see paragraph 16 11 the waveform and the harmonic spectrum of the current 8 5 1 Symbols The CUR
31. positive or negative is defined in the panel and therefore acquires the value of the reactive power in that moment Pf The power factor inductive or capacitive positive or negative is defined in the panel and therefore acquires the value of the power factor in that moment 0 The active power positive or negative or the reactive power inductive or capacitive positive or negative is NOT defined in the panel and therefore acquires a null value The power factor inductive or capacitive positive or negative is NOT defined in the panel Page 126 of 131 VR2250 16 12 2 3 Phase 3 Wire System In the electrical systems distributed without neutral the phase voltages and the power factors and phase cosq lose importance Only the phase to phase voltages the phase currents and the total powers remain defined Phase 1 w12 e inia Three phase Phase 2 e equipment gU P d 7 NS Phase 3 l w3 2 VAR 32 In this case the potential of one of the three phases for example phase 2 is taken on as reference potential The total values of the active reactive and apparent power are expressed as sum of the indications of the couples of Watt meters VAR meters and VA meters Pror Wi_ 2 W3_2 Stor Wiz W32 ls VAR VAR3_5 J Page 127 of 131 VR2250 16 13 MEASURING METHOD OUTLINES The instrument is able to measure voltages currents active powers inductive and capacitive reac
32. serial output of the PC through the Original Optical serial cable Run the program Select the Download command Refer to software help ON Line for further instructions 9r dep Page 98 of 131 VR2250 13 MAINTENANCE 13 14 GENERAL INSTRUCTION The tester you have purchased 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 unfavourable 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 acid leakage which may damage the internal circuits of the instrument 13 2 BATTERY REPLACEMENT The symbol HF shows the battery charge If it is completely black the batteries are fully charged while the symbol indicates flat batteries When the batteries are too low to execute the test the instrument will show a warning message In this case interrupt testing and replace batteries following the procedure for battery replacement The instrument is capable of keeping the data stored even though batteries are not installed The Instrument Date and Time settings are not lost if you change the batteries within 24hours A CAUTION Only skilled technicians can perform this operation Before replacing batteries make sure that all test lea
33. the cursor on the corresponding Pg Symbol and then press F3 cge ENTER RECORDER CONFIG Bal ITE Example of ENERGY sub screen in single phase mode CAUTION e Selecting deselecting the active energy for the recording the corresponding active power will be automatically selected deselected e Selecting deselecting the reactive energies for the recording the corresponding reactive powers will be selected deselected Page 69 of 131 VR2250 Symbols Description Advised settings START MAN The recording of all the selected parameters will start at 00 seconds after pressing START STOP see chapter REF Ref6712586 r h 10 1 STOP MAN The recording of all the selected parameters will be interrupted manually by pressing START STOP see chapter 10 1 START AUTO STOP AUTO The recording of all the selected values will be started interrupted at the set dates and times In order to start the recording the user will have to press START STOP to set the instrument in Stand by mode until the start date and time previously set see chapter REF Ref6712622 r h 10 1 INT PERIOD The value of this parameter determines how many seconds will elapse before the values of all the selected parameters will be memorised see chapter 16 13 1 Available choices 5sec 10sec 30sec 1min 2min 5min 10min 15min 30min 60min HARM REC ON the instrument will record
34. the impact it will have on the devices except for transformers 16 12 POWER AND POWER FACTOR DEFINITION In a standard electric installation powered by three sine voltages the following is defined Phase Active Power P zVacl cos 9 n 1 2 3 Phase Apparent Power n 1 2 3 Phase Reactive Power n 1 2 3 Phase Power Factor n 1 2 3 Total Active Power Total Reactive Power Total Apparent Power PP Stor z pa On P Pror Total Power Factor FTOT s TOT Where Van RMS value of voltage between phase n and Neutral lh RMS value of n phase current fne Phase displacement angle between voltage and current of n phase Page 124 of 131 VR2250 In presence of distorted voltages and currents the previous relations vary as follows Phase Active Power n 1 2 3 P Y Vit kn COS D k 0 Phase Apparent Power n 1 2 3 Phase Reactive Power Phase Power Factor n 1 2 3 Distorted row Factor OPF COSfin phase displacement between the n 1 2 3 fundamentals of voltage and current of n phase Total Active Power Pog B P FB Total Reactive Power Oror Q Q Q Total Apparent Power PP Stor T Po d Dou Total Power Factor Where Vin RMS value of kth voltage harmonic between n phase and Neutral lkn RMS value of kth current harmonic of n phase fkn Phase displacement angle between kth voltage harmonic and kth current harmonic of n phase
35. to leave the Menu without modifying the existing parameters V 2 screen This screen is devoted to the settings relevant to the VOLTAGE recording Press ENTER to confirm the settings and pass to the following page Press ESC to leave this screen without modifying the existing parameters From this page you can enter the sub screen Harmonics which permits to select the voltage harmonics to be recorded Press ENTER to confirm the settings and leave the Menu Harmonics Press ESC to leave the Menu Harmonics without modifying the existing parameters v 3 screen This screen is devoted to the settings relevant to the CURRENT recording Press ENTER to confirm the settings and pass to the following screen Press ESC to leave this screen without modifying the existing parameters From this screen you can enter the sub screen Harmonics which permits to select the current harmonics to be recorded Press ENTER to confirm the settings and leave the Menu Harmonics Press ESC to leave the Menu Harmonics without modifying the existing parameters v 4 screen Menu composed of two sub screens devoted to the selection of the POWERS and ENERGIES to be recorded From this screen you can enter the sub screen POWER and ENERGY which permits the user to select the parameters to be recorded Selecting the active powers for the recording the corresponding active energies will be automatically selected Selecting the reactive powers for the recordi
36. toselect the Measurement e F3 to cancel the last recording performed e F4 to cancel all the recordings performed ENTER to see the measurement results of the selected test e ESC to quit this mode Page 96 of 131 VR2250 11 2 ANALYZER MEMORY This option permits you to display Y The present content of the instrument memory v The size of the memorised data v The residual space available for future recordings expressed in days and hours All the stored data can be displayed and analyzed only downloading the data to a PC with the operating software After selecting ANALYZER MEMORY from the Main Menu the screen below will be displayed ANALYZER MEMORY 01 Smp 02 01 01 23 02 Rec 02 01 02 01 03 R amp a 02 01 02 01 04 Rec 02 01 02 01 05 R amp a 02 01 02 01 06 Rec 04 01 05 01 DATA SIZE 0 11Mb REC TIME 0d 06h T V LAST ALL Example of ANALYZER MEMORY screen v Rec recordings effected with respective Start and Stop dates expressed in the format day month start day month stop without Voltage Sag and Surge detection v R amp a recordings effected with respective Start and Stop dates expressed in the format day month start day month stop with Voltage Anomalies Sag and Surge detection Smp values of the samples of voltage and current stored by pressing SAVE DATASIZE dimensions of the data saved in the instrument memory REC TIME amount of memory ava
37. water around the rod EARTH 05 06 01 Q Vd V Test 04 RAVG 0 74 3 W FUNC CLR Test 04 RAVG 0 74 3 W FUNC CLR EARTH 05 06 01 Q Vd 1V Test 04 RAVG 0 74Q 3 W FUNC CLR Disconnect the External Power Supply Adapter EARTH 05 06 01 Warning symbol Voltage noise in input Message Rc Check Auxiliary Earth rods Page 53 of 131 VR2250 The message Rp high indicates that the instrument cannot measure correctly the Voltage from Auxiliary DNE Earth rod and cannot eae Q flow the minimum i current for Test 04 measurement Check RAVG 0 74Q that the terminals are AR AICR correctly connected and Message Rp Check the Auxiliary earth rod 3 W Auxiliary Earth rods connected to B2 yellow FUNC CLR conductor has not been inserted in a pebbly or poor conductive ground If necessary pour some water around the rod The message Rp and Rc high indicates that the instrument cannot measure correctly the Voltage from Auxiliary L Earth rod and cannot B Q flow the minimum abd current for measurement Check Test 04 that the terminals are RAVG 0 740 correctly connected Message Rp and Rc HIGH Check if the Auxiliary Check Auxiliary Earth rods earth rod connected to B2 yellow conductor and B4 black conductor has not been ins
38. 1 VR2250 Below you can find the parameters for each of 5 Typical Configurations EN50160 Y ANALYZER CONFIG System SINGLE Frequency 50Hz Current Range not modified Clamp Type STD TV Ratio not modified Password not modified v RECORDER CONFIG Start MANU the recording is started 1 minute after pressing the START STOP key Stop MANU Integration period 10min Recording of harmonics ON Recording of Voltage anomalies voltage Dips and Surge ON Voltage Reference for Dips and Surge detection 230V Upper Limit for Dips and Surge detection 6 Lower Limit for Dips and Surge detection 10 Selected voltages V1 Selected voltage harmonics THD DC 01 02 03 04 25 CO GENERATION OFF SURGES amp DIPS Y ANALYZER CONFIG System SINGLE Frequency 50Hz Current Range not modified Clamp Type STD TV Ratio not modified Password not modified v RECORDER CONFIG Start MANU the recording is started 1 minute after pressing the START STOP key Stop MANU Integration period 1min Recording of harmonics OFF Recording of Voltage anomalies voltage Dips and Surge ON Voltage Reference for Dips and Surge detection 230V Upper Limit for Dips and Surge detection 6 Lower Limit for Dips and Surge detection 10 Selected voltages V1 Selected current 11 CO GENERATION OFF HARMONICS ANALYZER CONFIG System SINGLE Frequency 50Hz Page 91 of 131 VR2250 Current Range not m
39. 3 Connect the phase and neutral voltage wires respecting the connections shown in the picture 4 f you want to measure current and power connect the clamp meter to the phase conductor respecting the specifications shown on the clamp and the connections shown in the picture In case of doubts select the POWER working mode and check if the active power P is positive If it s negative remove current transducer from the wire and reconnect it so the transducer label faces the opposite direction 5 Apply voltage to the electrical equipment under test if previously shut off for the instrument connection 6 The values of the available electrical parameters will be displayed on the display of the instrument For further details see the paragraph relevant to the position of the switch You can press HOLD to interrupt the updating in real time of the displayed values You can press SAVE to save the displayed values see paragraph 9 2 If you want to record o N Page 85 of 131 VR2250 a Check and if needed modify the values of the basic parameters see paragraphs 8 1 and 8 2 b Check and if needed modify the recording parameters by pressing MENU see the paragraph corresponding to the position of the rotary switch selected C To start the recording press START see chapter 6 8 8 2 Using the Instrument in a Three Phase System CAUTION The maximum voltage between B1 and B4 inputs is 600 V CATII 350V N ph
40. 4 3 2 Power supply Batteries Battery Life External Power Supply Adapter optional 14 3 3 Display Display Type Resolution Visible Area 14 3 4 Memory Safety Test Memory ANALYSER 14 4 ENVIRONMENT Reference Temperature Working Temperature Range Working Humidity Storage Humidity Range Storage Humidity 225 L x165 W x 105 H mm 1295g approx including batteries 1150g approx excluding batteries 6 x 1 5 LR6 AA AM3 MN 1500 LOWQ approx 800 tests MO approx 500 tests RCD AC and A Type approx 1000 tests LOOP P P P N P PE approx 1000 tests Rat approx 1000 tests EARTH approx 1000 tests PHASE SEQUENCE approx 1000 tests AUX recording approx 20 Hours ANALYSER recording approx 20 Hours Code MAR only for ANALYSER and AUX func Graphic with Backlight 128 x128 73mm x 73mm 999 measurements 2MByte with 63 channels select and Integration Period 15min gt more than 30 days 23 5 C 0 40 C lt 80 10 60 C lt 80 Page 104 of 131 VR2250 14 5 ACCESSORIES Standard accessories Description Code e GB 13A cable with 3 terminals Set with 4 cables 2m 4 crocodiles Management Software RS232 Optical Serial Cable TOPLINK Zip Carrying Case Calibration Certificate ISO9000 User s Manual Optional Accessories Description Code e Set with 4 cables and 4 earth rods External Power Supply Adapter MAR JTHHEHE e Set for carrying Belt e Leakage Cur
41. 85 8 8 1 Using the Instrument in a Single Phase System sse enne 85 8 8 2 Using the Instrument in a Three Phase System sssssssesssssseeeennentete terere tenerent 86 SET Alei P 87 9 1 Saving safety Test Results iit ente He EE e Re eed Ded tbe ERO aie ideas 87 9 2 Saving Displayed Values of ANALYSER Function sse tentent tenente nens 87 TO izssiMrl9w t 88 10 17Start a Recording inb an ttti tete itt nee iiie dp ede ree eese HE Hed UR Dae Den He rci 88 10 2 Setting Typical Configurations 2 2 2d if tradet item tein tiit pte ene aet 89 10 27 Default Configuratioh rtc te tette tct tite a cet e ta ta ated cales 89 10 2 2 Typical Confiq rationsa s socie E ha e e pa nee Ear aee dle Hiep ER 90 1073 During a Recording 9 4 3 foot i a ce treten Made nen D E NU tearm det irt dnt delete 94 103 i MENU Key C M S 94 10 3 2 Rotary Switch during a recording 3 62 ptite tto frere toe tor eri o tree GE r HISP UL ree E Ee Ld 95 10 4 Stopping a Recording or an Energy Measurement sss tenni 95 TEINSTRUMENT S MEMORY ci ciue rui anana te nee oon Ree de cu aaaeaii i Fes Ye Racine usura cte 96 11 SAEETY TEST MEMORY zioni ertet etn en iHe Dirt cedere RH HF PUR De rr DO Uriel 96 11 2 ANALYSER MEMORY 2 435 ttti qu n Rd e ette tede te elei 97 12 CONNECTING THE INSTRUMENT TO A PC
42. A Voltage Range Phase Earth 100 250V Frequency 50Hz 0 5Hz LOOP Raisma FAULT LOOP IMPEDANCE MEASUREMENT without RCD Tripping Phase Earth Range Q Resolution Q Accuracy 1 1999 1 0 5 Reading 3digit Test Current 15mA Voltage Range Phase Earth 100 250V 50Hz e EARTH GROUND RESISTANCE MEASUREMENT WI TH EARTH RODS Range RE O Resolution Q Accuracy 0 01 19 99 0 01 20 0 199 9 0 1 5 Reading 3 digit 200 1999 1 Test Current lt 10mA 77 5Hz Open circuit Test Voltage 20V RMS e RESISTIVITY MEASUREMENT Range p Resolution Accuracy 0 60 19 99 Om 0 01 Om 20 0 199 90m 0 19m 200 19999m 1 Qm 5 Reading 3 digit 2 00 99 99kQm 0 01 kom 100 0 125 6kQm 0 1 kom setting distance 10m Test Current Open circuit Test Voltage 10mA 77 5Hz 20V RMS Page 101 of 131 VR2250 14 1 2 ANALYSER and AUX functions VOLTAGE MEASUREMENT SINGLE PHASE SYSTEM AUTORANGE Range V Resolution V Accuracy Input Impedance 15 310V 0 2V d 300kQ Phase Neutral 310 600V 0 4V 0 5 Reading 2digit 300K9 Phase Phase VOLTAGE SAG AND SURGE DETECTION SINGLE PHASE SYSTEM MANUAL RANGE Resolution Resolution Accuracy Accuracy rif 50Hz Range V Voltage Time Voltage Time
43. Basic Setting RECORDER CONFIG sss nter terere tnter tentent tte tte tete testis 65 8 3 ANALYSER FUNCTIONS creer rtt necne e reir eee tre e n i Bep det dais 72 84 VOETAGE FUNCHON ai corri rete Ig tolam PI PRU Br A Od DOR ADR deeem eda 72 Bi m BS deo se 72 64 2 METER mode ER ttd ret Benet ae et e t ene elm Diae tcs 73 8 4 3 Y HARM ITIOOO iticsctico tn tc t tcn tien at e t n tcc tco ava it c eat ete eben 74 BAA WAVE ITIOUR sociata reet to ecc d bea itu eed tea ed i d dun DD ode eer 75 8 5 CURRENT FUNCION ccm ett tete rrr cet e be cut eee pia e tere erue dte cin di tete 76 Eos ERES e 76 65 20 METER mode 550 co eate rts aves ve ertt avene rase e rete eee cans te 77 B59 ARM MOIO eiae cde teet e cc Mane eB iei DIE ids tiated E ORE RERO ER ROMS BA 78 854 WAVES MOdG octets rita eir tee be S DEN Alt Ne aa 79 8 6 POWER FUNCTION iactis coectetuer ea teni Ru i oye 80 8 61 Symbols orn Cen c e vd tabe etes ute feste etn tupra Loto sete le tbe ald 80 8 6 2 METER mode oi Re e etie Dedit Bo ih a EDGE ELO uH ciet 81 8 6 3 Visa 82 8 7 ENERGY EUhCliOn accipe merat iir rp C tap ed Deere decer onte n ndn nee 83 8 71 Symbols ecc vie o os dat e a t a rd PI Ch EE eens DR fecus 83 87 2 METER mode t ERU RCRUM ERU UAE E DUREE ER MEUSE 84 8 8 Measuring PrOCedUreS t eim iret e ii tert ene nen dee He YR He coe ce perit edge
44. ESC to leave the Menu without modifying the existing settings Use the multifunction keys F1 F2 to position the cursor on the desired current harmonic and use the multifunction keys F3 F4 to select deselect it s selected if marked in black Press ENTER to confirm this Screen Press ESC to leave this page without modifying the existing settings The instrument will record the values of the selected harmonics corresponding to the currents selected in one of the two screens of the Menu previously illustrated VR2250 From 3 4 screen of RECORDER CONFIG MENU cg ENTER RECORDER CONFIG CO GENERATION ON POWER Pg ENERGY Pg Example of 4 screen In order to select the POWER to be recorded use the multifunction keys F1 F2 to position the cursor on the corresponding Pg Symbol and then press F3 ENER RECORDER CONFIG Q1i dPf1 Example of POWER sub screen CAUTION e Selecting the active power for the recording the corresponding active energy will be automatically selected e Selecting the reactive powers for the recording the corresponding reactive energies will be selected Page 68 of 131 VR2250 From 3 4 screen of RECORDER CONFIG MENU cg ENTER RECORDER CONFIG CO GENERATION ON POWER Pg ENERGY Pg Example of 4 screen In order to select the ENERGIES to be recorded use the multifunction keys F1 F2 to position
45. Hz Ut 2V VP N 231V VP PE 231V Value of contact voltage U detected referred to the rated value of the RCD current set OK RCD passed the test x1 30mA FUNC IdN Contact Voltage Limit value ea RCD nominal current RCD type e The test can be stored pressing the SAVE key twice according to paragraph 9 1 Page 29 of 131 VR2250 6 3 2 3 Results of AUTO mode 4 Press the START key once to execute the test The instrument carries out the pad following six tests with different values of rated current 1 2l4n with 0 current waveform the RCD shall not trip amp 1 2l4 with 180 current waveform the RCD shall not trip lan With 0 current waveform the RCD trips message RESUME RCD lan with 180 current waveform the RCD trips message RESUME RCD 5lan with 0 current waveform the RCD trips message RESUME RCD Blan with 180 current waveform the RCD trips end of the test The test is good if all values of tripping times are within the limits reported in Table 3 CAUTION Never disconnect the test leads when the message MEASURING is displayed At the end of the test if RCD 05 06 01 Tripping time expressed in all six tests resulted to 0 180 milliseconds M x1 2 999ms 929m s be positive the instrument displays the Ri PRI Cans Value of contact voltage
46. LTS CANNOT BE SAVED RCD 05 06 01 n the tests MAN x1 x2 x5 and AUTO during x1 and x5 tests if the RCD RCD tripping time trips to separate the A 487 ms circuit within a time not complying with the limits FRO 50 0Hz Ut 1V VP N 231V VP PE 230V reported in Table 3 the instrument emits a long RR ATTENTION the tripping acoustic signal at the a time is higher than the 30m 50V i end of the test and standard limit displays the values FUNC IGN RCD UL alongside The test can be stored pressing the SAVE key twice according to paragraph 9 1 Page 36 of 131 VR2250 ce If the RCD tripping time is higher than the instrument s measuring limits the instrument emits a long sound signal at the end of the test and displays the values alongside 05 06 01 A gt 999 ms FRQ 50 0Hz VP N 231V VP PE Uts 1V 230V A TIME NOT OK xl 30mA 50V FUNC IdN RCD UL prd RCD tripping time is bigger than the maximum measurable time it depends on type of test see following table ATTENTION the tripping time is higher than the standard limit The maximum duration depends on the test type Test type General RCD Selective RCD MAN x1 test 999ms 999ms MAN x2 test 200ms 250ms MAN x5 test 50ms 160ms al test 300ms During the ramp ual test RCD 05 06 01 Tripping Current
47. Level Measurement are not supported The Leakage Current mode allows the following operations Y Display in real time the values coming from External Flexible Clamp Y Memorize the values displayed pressing SAVE key Y Record pressing the START key after a proper setting an Input signal coming from the External Flexible Clamp It will be possible to analyse the recorded data ONLY by transferring the data to a PC Y Record pressing the START key an Input signal coming from an External Flexible Clamp using Typical Configurations with pre programmed parameters inside meter see paragraph 7 2 2 It will be possible to analyse the recorded data ONLY by transferring the data to a PC CAUTION Please note the difference between memorize and record the former means that the instrument stores in the memory only the actual values displayed while the latter means that you want to store the course of the input signals during a recording time typically long Page 56 of 131 VR2250 7 1 LEAKAGE CURRENT REAL TIME MEASUREMENT This working mode allows the user to perform real time measurement and recording of Leakage Current using the External Flexible Clamp 1 Press this key to access to AUX mode 2 Pressing this function key you will change the measuring unit of the instrument s input The following possibilities will be displayed cyclically De Instrument s input disabled mA Leakage current Others not su
48. M 06 243 8V LIM 10 207 0V Example of 2 screen with ANOM flag enabled If you want to change Voltage Harm place the cursor on he corresponding Pg symbol then Press F3 Use the multifunction keys F1 F2 to position the cursor on the RECORDER CONFIG desired voltage harmonic and use the multifunction keys F3 F4 to select deselect it s selected if highlighted in black Press ENTER to confirm this screen Press ESC to leave the Menu without modifying the existing settings The instrument will record the values of the selected harmonics corresponding to Example of sub screen the voltages selected in one of VOLTAGE HARMONICS the two screens of the Menu previously illustrated VOLTAGE HARMONICS Page 66 of 131 VR2250 From 2 screen of RECORDER CONFIG MENU cg ENTER RECORDER CONFIG CURRENT HARM REC Pg ON Example of 3 screen If you want to change Current Harm place Cursor on the corresponding Pg symbol then Press F3 cg ENTER RECORDER CONFIG CURRENT HARMONICS OF 02 o4 08 09 10 11 15 16 17 18 22 23 24 25 29 30 31 32 39 46 Example of sub screen CURRENT HARMONICS Page 67 of 131 Use the multifunction keys F1 F2 to position the cursor on the desired word and use the multifunction keys F3 F4 to modify the value or select deselect the desired parameter it s selected if marked in black Press ENTER to confirm Press
49. ONFIG CONTRAST DATE amp TIME LANGUAGE 4 T Inside RECORDER CONFIG mode it s possible to execute the following operations e Setting of Start Stop recording mode AUTO or MANUAL and the date hour of Start Stop in AUTO mode e Setting of Integration Period see paragraph 16 13 1 selectable from 5 sec to 60 min Press ENTER to confirm each setting or ESC to escape from setting and exit from RECORDER CONFIG menu The various pages of the RECORDER CONFIG can be schematised as follows overleaf Page 59 of 131 VR2250 cg VeV Press ENTER to confirm and leave the Menu keeping the settings 73 Press ESC to leave the Menu SAFETY TEST MEMORY without modifying the existing ANALYZER MEMORY made parameters RECORDER CONFIG START STOP MANU 15min INT PERIOD the value parameters eme RESET ANALYZER CONFIG RECORDER CONFIG CONTRAST DATE amp TIME LANGUAGE To Select MANUAL or AUTOMATIC start stop mode place the cursor on MANU or AUTO using the multifunction key F1 or F2 and select the desired mode using F3 or F4 Use the multifunction keys F1 F2 to position the cursor on the desired word and use the multifunction keys F3 F4 to modify Press ENTER to confirm and proceed inside the Menu keeping the settings made Press ESC to leave the Menu without modifying the existing The foll
50. OWABLE VALUES The test result is positive when the insulation resistance indicates values higher or equal to those indicated in the table reported in the section relative to insulation tests Notes e SELV system is a system of category zero or very low safety voltage featured by Y Power supply autonomous source ex batteries small generator or safety ex safety transformer v Protection separation to other electrical systems double or reinforced insulation or a metal screen connected to the earth Y There are no earthed points insulated from the earth e PELV system is a system of category zero or very low safety voltage featured by Y Power supply autonomous source ex batteries small generator or safety ex safety transformer v Protection separation to other electrical systems double or reinforced insulation or a metal screen connected to the earth Y There are earthed points not insulated from the earth e Electrical separation is a system featured by Y Power supply insulation transformer or autonomous source with equivalent features ex generator v Protection separation to other electrical systems insulation not lower than that of the insulation transformer Y Protection separation to the earth insulation not lower than that of the insulation transformer Page 114 of 131 VR2250 16 4 Earth Resistance Measurement in TT Systems PURPOSE OF THE TEST Check that the RCD is co ordinated
51. RCD tripping Range O Resolution C Accuracy IAN 1 1999 1 0 5 Reading 3digit Test Current 0 5 IAN set Tripping Current Measurement IAN RCD Type Range lan mA Resolution mA Accuracy IAN IAN lt 10mA AC 0 5 1 4 lan A 0 5 2 4 lan 0 1 lan 096 5 lan IAN gt 10mA AC 0 5 1 4 lan A 0 5 2 lan Page 100 of 131 VR2250 FREQUENCY MEASUREMENT Range Hz Resolution Hz Accuracy 47 0 63 6 0 1 0 1 Reading 1 digit RCD and LOOP function are active only for 50Hz 0 5Hz frequency e VOLTAGE MEASUREMENT RCD LOOP PHASE ROTATION Range V Resolution V Accuracy 0 460V 1 38 Reading 2digit e LOOP P P P N LINE IMPEDANCE MEASUREMENT Phase Phase Phase Neutral 10 0 199 9 Range Q Resolution Q Accuracy 0 01 9 99 0 01 0 1 5 Reading 3digit 0 1 mQ on range 0 0 199 9 mQ with IMP57 Peak value of the Test current 127V 3 65A 230V 6 64A 400V 11 5A Voltage Range Phase Phase Phase Neutral 100 250 100 440V Frequency 50Hz 0 5Hz e LOOP P PE FAULT LOOP IMPEDANCE MEASUREMENT Phase Earth Range Q Resolution Q Accuracy 0 01 19 99 0 01 20 0 199 9 0 1 5 Reading 3digit 200 1999 1 0 1 mQ on range 0 0 199 9 mQ with IMP57 Peak value of the Test current 127V 3 65A 230V 6 64
52. RENT position has three working modes Y METER v WAVE v HARM These modes will be described in detail in the next paragraphs The symbols used are described below Symbol Description I Current RMS value Ipkt Peak value of the current h01 h49 Harmonic 01 harmonic 49 Thdl Total harmonic distortion factor of the current see paragraph 16 11 freq Network frequency Tab 2 Symbols used in the position CURRENT Page 76 of 131 VR2250 8 5 2 METER mode In this mode the instrument shows the below screen according to the settings made as per paragraph 8 1 27 09 00 17 35 12 CURRENT SINGLE PHASE I1 30 21 A Ipki 49 53 A ThdI 23 06 freq 50 0 Hz CLAMP TYPE STD HARM WAVE PG PG Example of screen The symbols used are described in Tab 2 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Following keys are enabled ce F1 F2 F3 F4 SAVE ENTER HOLD MENU START STOP to pass to HARMONIC mode see paragraph 8 5 3 to pass to WAVE mode see paragraph 8 5 4 to pass to previous next function respectively to save in the instrument memory a record of Smp type see paragraph 9 2 containing the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording to enable disable the HOLD function updating interruption of the displayed da
53. RMT For further details regarding IMP57 use and technical characteristics please refer to IMP57 user s manual or Martindale Electric web site www Martindale Electric co uk Page 38 of 131 VR2250 6 4 2 Measurement procedure and results of P N mode 1 Select P N mode by means of the F1 key 2 Connect the red green and Black connectors of the three terminal mains cable or of the split cables to the corresponding input terminals of the instrument B1 B3 B4 Instrument connection for P N in a 400V three Instrument connection for P N test in a 230V phase system single phase System 3 Connect the mains plug into a 230V 50Hz socket or the crocodiles to the conductors of the three phase system see previous pictures 4 If possible disconnect all low impedance loads downstream the point at which the measurement is to be taken as such impedances would be in parallel with START the line impedance to be measured 5 Press the START key The instrument starts the test CAUTION The measurement in a 230V System make a test current of 6A approx This may cause the tripping of magnetic protection switch with nominal N value lower than 10A If necessary perform the test upstream of the switch Never disconnect the test leads when the message MEASURING is displayed Atthe end of the test LOOP 05 06 01 Value of phase to neutral line the instrument emits a impedance expressed in
54. TEST MEMORY ANALYZER MEMORY RESET ANALYZER CONFIG RECORDER CONFIG CONTRAST DATE amp TIME LANGUAGE 3 Press MENU key again The instrument displays a screen as shown below picture on the left In this way it is possible to select the desired configuration on 11 channel with F1 or F2 key NOTE that TEMP and HUMIDITY are not supported TYPICAL CONFIG TYPICAL CONFIG LEAKAGE I1 LEAKAGE I1 ITEMP 9C I1 EMP 9 C I1 HUM HR I1 HUM HR I1 i D 4 t Configuration selection Confirmation configuration selection 4 Press ENTER key The instrument displays the message Data saved for a while to confirm the desired configuration see above picture on the right The instrument will return to the measuring mode and you can start recording by pressing START STOP key Page 61 of 131 VR2250 8 ANALYSER This function allows the following operations Y v v Display in real time the electrical parameters of a single phase system with and without neutral wire and the harmonic analysis of voltage and current Conduct a direct Energy measurement without memorizing Memorize pressing SAVE key the sampled values of the Parameters present at the instrument input generating a Smp record inside the instrument memory It will be possible to analyse the memorized data ONLY by transferring the data to a PC Record simultaneously pressing the START ke
55. VR2250 MARTINDALE o 0o 6 ELECTHRIC VR2250 INSTALLATION ANALYSER MULTIFUNCTION TEST INSTRUMENT USER INSTRUCTION MANUAL Page 1 of 131 VR2250 TABLE OF CONTENTS 1 SAFETY PRECAUTIONS AND PROCEDURES scsssssssssssssssssssssssssssssssnsasasesassnesessosseesesssesssaresessazasososes 5 Tul BOIWAIS aad i dar d det e En EREXIT e DE RE HERO REED ER RR rho E EIER HUE E 5 12s Preliminary InsiT ctlOll s cente rr ae ten cert t bia Dre Rieti cre dde te Frederik er edet ede 5 LECEEIBIT IRURE HMM IRIURE 6 1 4 After USG cra ere ro meer ae ed een e d a EE AETA EEA 6 2 GENERAL DESCRIPTION m 7 A R aa Ce o ccce ete tri eir ree o Eoi eret te eir rom A E a Pa Te REOR E cu Eno 7 2 2 FUICtOFiS s aeree eerte teen amener enin herren eden etate De taee tao Dus ga ente certe rn ndn au aen 7 3 PREPARATION FOR USE ei Dua Errata da innate et 8 3 1 Initial Control cr rn mra pen eni aru p irs 8 SM IA 8 3 9 Caliban nan a o RIEN A NEU RM IER DEI LE 9 SEU a a a aa a a aa a 9 4 INSTRUMENT DESCRIPTION pais rtideoteur aisi 10 4 1 Display Descriptiori uei tr te ener ER EFFERRI AREE ERO ID Er EC GE EP 11 4 2 Initial Scr eNe eae e m cpap seacdsse des ROTE netur oup EI UII vas geet EE IE oer 11 4 3 Backlight FUNGUO Neininger eir c m i e ERG 11 SN agi ccce 12 5 1 How to Adjust the Contrast nsista aannaaien eit
56. ained from the average values of active and reactive power Each single average power factor of phase or total is therefore calculated at the end of each integration period on the average value of the corresponding powers independently on the fact that they must be registered or not Besides for a better analysis of the type of load present on the line and in order to have terms of comparison when studying the invoicing of the low cosq the values of inductive and capacitive cosq are treated as independent parameters Page 128 of 131 VR2250 17 APPENDIX 1 MESSAGES DISPLAYED Message Description Advices AUTONOM Available memory autonomy for the recording which is being effected CLEAR ALL Enter The operator is trying to cancel all the recordings effected Press ESC in order not to cancel the whole memory press ENTER to confirm CLEAR LAST Enter The operator is trying to cancel the last recording effected Press ESC in order not to cancel the last recording press ENTER to confirm Data saved The data have been saved DATA SIZE Dimensions of the stored data HOLD By pressing the correct key the HOLD function has been Press HOLD again to disable this function activated Password A recording has been started and at least 5 minutes have Insertthe password passed from the last activity of the instrument see F1 F4 F3 F2 paragraph 7 Invalid date The inserted dat
57. ase earth or 600V CATIII 300 V phase to earth Do not measure voltages exceeding the limits prescribed by this manual Should you exceed the voltage limits you could damage the instrument and or its components or endanger your safety The instrument is a single phase system So you can analyse a three phase system repeating 3 times a single phase analysis described in previous paragraph RCD gt e e Red Black Instrument connection in a three phase system The Three Phase power values are given by Total Active Power Pt P1 P2 P3 Total Reactive Power Qt Q1 Q2 Q3 Total Apparent Power St Pt Qt Page 86 of 131 VR2250 9 SAVING RESULTS The SAVE button can be used to store the displayed results related to the rotary switch position v SAFETY TEST and for AUX rotary switch position pressing this key the instrument will store the displayed result generating a corresponding record in the SAFETY TEST MEMORY see paragraph 11 1 Y ANALYSER rotary switch position pressing this key the instrument will store the displayed result generating a Smp record in the ANALYZER MEMORY see paragraph 11 2 Please note that saving results is different from recording 9 1 SAVING SAFETY TEST RESULTS After a SAFETY TEST function LOWQ MQ RCD LOOP Phase sequence EARTH or during a real time measurement in AUX position the user can press the SAVE button to store t
58. case of RCDs of selective type according to Table 3 The RCD test effected by means of the test key is aimed at preventing the gluing effect from compromising the working of the RCD which has been inactive for a long time therefore this test is effected only to verify the mechanical working of the RCD and it does not permit to declare that the RCD is complying with the standards According to a statistical survey the periodical check once a month of the RCDs by means of the test key reduces by one half the RCD fault rate this test however detects only 24 of defective RCDs INSTALLATION PARTS TO BE CHECKED All the RCDs shall be tested when installed In the low voltage installations the test is recommended to grant an acceptable safety level For the medical rooms this check shall be effected periodically every six months on all RCDs according to the standards CEI 64 4 5 2 01 and CEI 64 13 Note In this case the earth installation is not available Perform the test connecting the instrument with one terminal on a conductor downstream of the RCD and one terminal on the other conductor upstream of the RCD itself ALLOWABLE VALUES To compare the measurements make reference to the Table 5 reporting the limits for the tripping times On each RCD it is necessary to effect a test with leakage current in Page 116 of 131 VR2250 phase with voltage and a leakage current phase shifted by 180 with respect to the voltage The hig
59. cause the tripping of 10mA If necessary perform the test upstream of the switch Never disconnect the test leads when the message MEASURING is displayed Atthe end of the test IDEE SAMMEMME Value of phase to Earth the instrument emits a Resistance expressed in O double sound signal 2 indicating that the test Q Effective value of the phase 115A 171 is correctly to Earth prospective short terminated and circuit current expressed in displ h l Freq 50 0HZ Amps calculated according to ISp ays the values VP N 231V Vp PE 231V the following formula alongside asi RA Working mode FUNC Tm U Formula for calculation of prospective short circuit current Tec Fi PE Where Un Nominal phase to neutral voltage 127 if Vmeas lt 150 230 if 150V Vineas lt 250 e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 43 of 131 VR2250 6 4 6 Measurement procedure and results of mode 1 Select 2 mode by means of the F1 key 2 Connect the Red Yellow and Green connectors of the split cables to the corresponding input terminals of the instrument B1 B2 B3 Instrument connection for Phase Sequence Detection in a 400V three phase system 3 Press the START key to execute a test Atthe end of the test the instrument emits a double sound signal LOOP EEE Phase Sequen
60. ce OK indicating that the test is correctly terminated and RST Value of the Phase to Phase displays the values Voltage alongside FRQO 50 0HZ VR S 391V VS T 401V VT R 399V i FUNG Working mode e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 44 of 131 VR2250 6 4 7 LOOP Faulty Cases Se If the instrument detects the External Power supply adapter connected the instrument will show the message displayed along side Should the instrument detect that the phase and or neutral cables are not connected to an installation the screen alongside is displayed when pressing START Should the instrument detect a voltage between phase and neutral higher of 250V for example in case the black cable is connected to an installation phase conductor of a 400V three phase system the screen alongside is displayed LOOP 05 06 01 Q Disconnect the External NE Power Supply Adapter FRO 50 0HZ VP N 231V VP PE 230V A REMOVE POWER P N FUNC Z2Q LOOP 05 06 01 ae A FRQ 50 0H2Z VP N 1V VP PE OV EEEEESRUArc NN NO VOLTAGE Detected P PE 50V FUNC Z2Q UL LOOP 05 06 01 e cu A Freq 50 0HZ VP N 401V VP PE 230V HIGH VOLTAGE Detected P PE 50V FUNC Z2Q UL Page 45 of 131 VR2250 7 This screen is
61. ct Check the Phase Sequence connection ERR P The active powers shown on the right side of the message If there isn t a situation of co generation are negative check if the clamps are properly connected ERR SEQ amp P The active powers shown on the right side of the message If there isn t a situation of co generation are negative and the Phase Sequence isn t correct check if the clamps are properly connected check the Phase Sequence connection ERR CONNECTION The instrument has detected a wrong connection to Voltage inputs Check the Voltage connections Error Vref The user set a Voltage reference not compatible with Check Voltage Reference set in CONFIG voltage at instrument s input RECORDER ERR SYNC The System Frequency is out of range Check the System Frequency check setting in ANALYZER CONFIG Selection Error There is a mismatch between the Parameter enabled and the parameter selected for an AUX recording Check the parameter enabled in AUX posiion and the selected parameter for recording Errori Error 5 The instrument memory is damaged Contact Martindale Electric Page 129 of 131 VR2250 18 APPENDIX 2 RECORDABLE PARAMETERS SYMBOLS Page 130 of 131 Symbol Description V1 Voltage RMS value freq Network frequency l1 Current RMS value DC Continuous component of voltage or current h01 h49 Ha
62. ction respectively to save in the instrument memory a record of Smp type see paragraph 9 2 and the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording to enable disable the HOLD function updating interruption of the displayed data All the previous functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement to record selected parameters according to the instrument s settings see chapter 10 Page 81 of 131 VR2250 8 6 3 WAVE mode Selecting the WAVE mode the screen below will be displayed according to the settings made as per paragraph 8 1 The screen shows the waveform of the current and the voltage 27 09 00 145 35202 Example of screen The symbols used are described in Tab 3 For eventual messages displayed see appendix 1 MESSAGES DISPLAYED Following keys are enabled ESC to return back to METER mode see paragraph 8 6 2 SAVE to save in the instrument memory a record of Smp type see paragraph 9 2 containing the instantaneous values of voltage an
63. ctrically prior to shipment All care has been taken to ensure that the instrument reaches you under safe conditions You are recommended however to carry out a rapid check to detect any possible damage which might have been caused during transport Should this be the case immediately contact the distributor Check also that the packaging contains all the parts listed under paragraph 14 5 In case of discrepancies contact the distributor In case you have to send the instrument back please follow the instructions reported in paragraph 15 3 2 POWER SUPPLY The instrument can be powered by v 6 batteries 1 5V AA LR6 series located in the compartment on the back of the instrument not included in the package For battery life see paragraph 14 3 1 v An external power supply adapter optional code MAR to be used only for ANALYSIS and AUX function It is recommended that the MAR Power Supply adapter is used for long term measuring CAUTION For your own safety it s not permitted to use the external power supply adapter during Safety Test LOWO MQ RCD LOOP EARTH rotary Switch positions If you press the START button the Instrument will show the message A REMOVE POWER The symbol HF shows the battery status If it is completely black the batteries are fully charged while the symbol indicates weak batteries When the batteries are too low to execute the test the instrument will show a warning message I
64. d current present on the instrument inputs This function is disabled during a recording ENTER HOLD to enable disable the HOLD function updating interruption of the displayed data All the previous functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement MENU to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement START STOP to record selected parameters according to the instrument s settings see chapter 10 Page 82 of 131 VR2250 8 7 ENERGY FUNCTION This function permits to display the values of the active powers capacitive and inductive reactive powers power factor and cose Furthermore the instrument is able to measure directly see 8 7 2 the values of the energies and the values of the capacitive and inductive reactive energies 8 7 1 Symbols The position ENERGY has only one working mode v METER This mode will be described in detail in the next paragraphs The symbols used are described below Symbol Description P1 Active power Q1 Reactive power S1 Apparent power pf Power factor dpf1 coso Eai Active energy Eri1 Inductive reactive Energy
65. displayed SAFETY TEST MEMORY ANALYZER MEMORY RESET ANALYZER CONFIG RECORDER CONFIG CONTRAST DATE amp TIME LANGUAGE l T Its not possible to enter the MENU during a recording or a Real Time Energy measurement Pressing this button during a recording the display will show main recording parameter see paragraph 10 3 5 14 HOW TO ADJUST THE CONTRAST By pressing the multifunction keys F1 and F2 position the cursor on the CONTRAST item and confirm it by pressing the ENTER key By pressing the multifunction keys F3 and F4 adjust the contrast higher values correspond to a higher contrast while lower values correspond to a lower contrast and press the ENTER key to SAVE the change or press ESC to quit without saving This setting will remain unchanged after turning off the instrument 5 2 HOW TO SET DATE AND TIME By pressing the multifunction keys F1 and F2 position the cursor on the DATE amp TIME item and confirm it by pressing the ENTER key The time is expressed as hh mm 2 digits for hours 2 digits for minutes 24 hour clock Press the ENTER key to SAVE the change or press ESC to quit without saving This setting will remain unchanged also after turning off the instrument 5 3 HOW TO SET THE LANGUAGE By pressing the multifunction keys F1 and F2 position the cursor on the LANGUAGE EN item and confirm it by pressing the ENTER key By pressing the multifunction keys F1 and F2 position the c
66. displayed when the phase conductor has been reversed with the neutral EM Q one The instrument does not gang aan perform the test VP N 231V VP PE OV Exchange the red cable Phase and Neutral with the black one Conductors are reversed P PE 50V FUNC z2Q UL This screen is displayed when the phase conductor has been VIUERE exchanged with the Q Protection Conductors 2 The instrument does not uet enun perform the test VP N 1V VP P Exchange the red cable Phase and Protection with the green one Conductors are reversed P N FUNC 220 E Il 230V This screen is displayed LOOP 05 06 01 when in a 230V Phase to Phase System the OMNCM black conductor was M Q reversed with respect to the green one the Jreen one pde The instrument does not VP N 131V VP PE 227V perform the test Neutral and Protection Reverse the black and Conductors are reversed green conductors P N Page 46 of 131 VR2250 If a contact voltage Ut higher than the selected limit UL is detected the instrument interrupts the test and emits a long sound signal at the end of the test and displays the screen alongside Should the instrument detect an Earth Resistance extremely high to consider no presence of PE conductor or Earth installation ones it shows the message along side Please check th
67. ds have been disconnected from input terminals Switch OFF the instrument Remove all the test leads from the input terminals Unscrew the fixing screw from the battery compartment cover and remove it Remove all batteries replacing them with 6 new ones of the same type 1 5V LR6 AA AM3 MN 1500 respecting the polarity signs Fix the screw on the battery compartment cover Then put the holster on TONS e 13 3 INSTRUMENT CLEANING Use a soft dry cloth to clean the instrument Never use wet cloths solvents water etc 13 4 END OF LIFE Caution this symbol indicates that equipment and its accessories shall be subject to a separate collection and correct disposal Page 99 of 131 VR2250 14 TECHNICAL SPECIFICATIONS 14 14 TECHNICAL FEATURES Accuracy is indicated as of reading number of digits It refers to the following atmospheric conditions a temperature of 23 C 5 C with a relative humidity lt 60 14 1 1 Safety Test functions e LOWO 200mA CONTINUITY TEST AUTO RT RT MODE Range O Resolution O Accuracy 0 01 9 99 0 01 m 10 0 99 9 0 1 2 Reading 2 digit After Test leads calibration Test Current gt 200mA DC per R lt 5Q Test leads included Resolution for Test current 1mA Open Circuit Voltage 4V lt VO lt 24V e MQ INSULATION TEST Test Voltage V Range MQ Re
68. e Connection for 3 point Earth resistance measurement measurement Yellow Connection for measuring the resistance between an extraneous conductive part and the earth system START stor 3 Press the START key The instrument starts the test amp Atthe end of the test 05 06 01 Earth Resistance value the instrument emits a expressed in Q double sound signal 0 77 indicating that the VN Q Voltage value of electrical test is correctly i noise terminated and TEST CUR nri eem e s RAVG 0 74Q displays the values Ord Number of test aOngSIe Average Value of Earth 3 W Resistance calculated over m l the Number of tests 3 Point Working mode FUNC CLR displayed 4 The instrument will show automatically the Average value of the Earth resistance calculated over the tests performed Press F2 to RESET this value and the number of Tests ea This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 51 of 131 VR2250 6 5 2 Measurement procedure and results of p mode 1 Select p measurement mode by means of the F1 key 2 Select the distance d between the earth rods by means the F3 and F4 keys 3 Connect the 4 Red Green Yellow and Blue connectors of the single cables in the corresponding input terminals of the instrument B1 B2 B3 B4 Instrument connection for Earth resistivity measurement
69. e content of this manual cannot be reproduced in any form whatsoever without prior authorisation of the manufacturer NOTE All our products are patented and their trade marks registered The manufacturer reserves the right to modify the product specifications and prices if this is aimed at technological improvements 15 2 SERVICE If the instrument does not operate properly before contacting the after sales service check cables as well as test leads and batteries replace them if necessary Should the instrument still operate improperly check that the operation procedure is correct and conforms to the instructions given in this manual If the instrument is to be returned to the after sales service or to a dealer transportation costs are on the customer s behalf Shipment shall be however agreed upon A report must always be enclosed to a rejected product stating the reasons of its return To ship the instrument use only the original packaging material any damage that may be due to no original packing shall be charged to the customer Page 106 of 131 VR2250 16 PRACTICAL REPORTS FOR ELECTRICAL TESTS 16 1 Continuity Test On Protective Conductors PURPOSE OF THE TEST Check the continuity of protective conductors PE main equalising potential conductors EQP secondary equalising potential conductors EQS in TT and TN S systems Neutral conductors having functions of protective conductors PEN in TN C system NOTE Th
70. e efficiency of PE conductor and Earth installation If the instrument gets overheated tests cannot be carried out and the message alongside is displayed Wait until the initial screen is back in order to proceed with measurements LOOP 05 06 01 6 A FRO 50 0HZ VP N 1V Vp PE OV RAO 50V Ut DANGEROUS Message Ut the instrument doesn t detect an efficient protection circuit FUNC UL Mere 05 06 01 1 A FRQ 50 0HZ VP N 231V Vp PE 40V P PE 50V Message NO PE the instrument doesn t detect EE ORDEN efficient protection circuit FUNC Z2Q UL LOOP 05 06 01 Q A FRQ 50 0HZ VP N 231V Vp PE 40V A Hor Ah P P FUNC Z2Q Message hot the instrument got overheated Page 47 of 131 VR2250 Using the mode if a Phase to Phase voltage is lower than 100V the instrument displays the screen indicated alongside Using the mode if the instrument detects two phases connected together displays the screen indicated alongside LOOP 05 06 01 FRQ 50 0HZ VR S 391V VS T 0 V VT R OV LOW VOLTAGE T p CYpHASE ROTATION Phase T2 Voltage is lower than 100V FUNC Mere 05 06 01 FRQ 50 0HZ VR S 407V VS T 0 V VI R 407V A PHASE DOUBLED m7 CJ PHASE ROTATION Two
71. e is not correct Checkthe inserted date Energy Measuring The instrument is taking an energy measurement Press F1 to stop it Memory Full The memory of the instrument is full Cancel some recordings after transferring them toa PC No ext supply A recording has been started without connecting the Verify if you really want to start the recording external power supply optional code MAR without the extemal power supply In that case press START again No parameter sel A recording has been started without selecting any valueto Press START STOP and select at least a be recorded value entering the MENU No Phase selected Voltage and or current harmonics have been selected and Select at least one phase voltage and or the corresponding flag has been enabled HARMONICS current ON but no phase voltage or current has been selected PASSWORD ERROR The inserted password is wrong see paragraph 7 Check the password PASSWORD OK The inserted password is correct Please wait The instrument is waiting for the recording to be started see paragraph 6 Recording The instrument is recording see paragraph 6 Too many param More than 63 parameters have been selected harmonics Deselect some values included or More than 38 parameters with CO GENERATION Flag enabled Too many records The quantity of recorded data Smp exceeds the Cancel some recordings after transferring maximum allowed 35 them toa PC No Unit selected ERR SEQ The Phase Sequence isn t corre
72. e screen shows the waveform of the current 20 9 40 0 ds 35 12 Example of screen The symbols used are described in Tab 2 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Following keys are enabled ee ee ESC SAVE ENTER HOLD MENU START STOP to return back to METER mode see paragraph 8 5 2 to save in the instrument memory a record of Smp type see paragraph 9 2 containing the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording to enable disable the HOLD function updating interruption of the displayed data All the previous functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement to record selected parameters according to the instrument s settings see chapter 10 Page 79 of 131 VR2250 8 6 POWER FUNCTION This function permits to display in real time the RMS value of AC DC voltage the peak and ThdV value and the waveform of the voltage the RMS value of AC DC currents the peak Thdl value and the waveform of the
73. eal RCD tripping current For RCDs with fixed differential current this test can be performed to detect any leakage of the installation users In case the earth installation is not available effect the test connecting one instrument s terminal on a conductor downstream the RCD and one terminal on the other conductor upstream the RCD itself ALLOWABLE VALUES The tripping current shall range from Yalan to lan NOTE Make reference to the notes of the previous chapter To check whether significant leakage currents are present on the installation operate as follows a After deactivating all the loads perform the tripping current measurement and take note of the value b Activate the loads and effect a new measurement of the tripping current if the RCD trip with a lower current the installation leakage is the difference between the two tripping currents If during the test RCD is displayed the installation leakage current added to the current for contact voltage measurement 2lan causes the RCD tripping Page 117 of 131 VR2250 16 7 Measurement of Short Circuit Fault Impedance Zpn Zpp PURPOSE OF THE TEST Check that the tripping power of the RCD is higher than the maximum fault current of the installation INSTALLATION PARTS TO BE CHECKED The test shall be performed in the point where the short circuit current is the highest possible usually immediately downstream of the RCD to be checked The test shall be performed b
74. erted in a pebbly or poor conductive ground If necessary pour some water around the rod 3 W FUNC CLR THE PREVIOUS RESULTS CANNOT BE SAVED Page 54 of 131 VR2250 amp Ifthe Instrument detects a Resistance value higher than EARTH VERLEEN Message gt 1999 means that 19990 the instrument the resistance value is higher ill display th A than the maximum WI Gls ey Tie Scree gt 19990 measurable alongside Vd 1V Test 04 RAVG 0 74Q 3 W FUNC CLR e This result can be stored pressing the SAVE key twice according to paragraph 9 1 If the Instrument detects a resistivity value higher than EARTH meee Message gt 1999 means that 1999kQ the instrument the resistivity value is higher i than the maximum will display the screen gt 1 9 9 OkQm measurable alongside Vd 1V Test 04 pAVG 0 74kQm p DIST 5m FUNC CLR T Y e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 55 of 131 VR2250 7 AUX MEASUREMENT WITH EXTERNAL PROBES vAy lt j gt Turn the switch on AUX position V The F4 function key undertakes the following operations Pressing this key the instrument shows one of the following working modes displayed cyclically Y Leakage Current mA supported by Flexible Clamp Y NOTE that other Environmental Parameters C F HR m s mV Lux and Sound
75. es resulted to be indicative of the earth resistance Page 115 of 131 VR2250 EXAMPLE FOR EARTH RESISTANCE TEST Let s assume an installation protected by a 30 mA RCD Let s measure the earth resistance using one of the methods quoted previously to evaluate whether the installation resistance is complying with the standards in force and multiply the result by 0 03A 30 mA If the result is lower than 50V or 25V for special rooms the installation can be considered as co ordinated as it respects the above said relation When we face 30 mA RCDs the most of civil installations the maximum earth resistance allowed is 50 0 03 1666Q permitting to use even simplified methods which even though they do not provide extremely precise values give a value approximate enough for the calculation of the co ordination 16 5 Working Test of RCDs Rcd Rcd Dc Red S Rcd Dc S PURPOSE OF THE TEST Check standards CEI 64 8 612 9 CEI 64 14 2 3 2 2 whether general and selective RCDs have been installed and adjusted properly and whether they maintain their features over the time The check shall confirm that the RCD trips at a current l4 lower than its rated working current l4 and that the tripping time meets depending on the case the following conditions e Does not exceed the maximum time provided by the standards in case of RCDs of general type according to Table 3 e Is included between the minimum tripping time and the maximum one in
76. etween phase and phase Zpp in the three phase installations and between phase and neutral Zpn in the single phase installations ALLOWABLE VALUES Three phase installations Single phase installations 400 2 230 Pi gt Pi gt Zpp 43 Zpn Note P tripping power of the RCD Zpp impedance measured between phase and phase Zpn impedance measured between phase and neutral 16 8 Fault Loop Impedance Measurement Phase Earth PURPOSE OF THE TEST The fault loop is the circuit of the current when there is a bad isolation of the electrical system toward earth The fault loop is composed Transformer coil impedance The impedance of the line from the transformer to the fault The impedance of the protective conductor from the conductive part to the neutral of the transformer When the instrument measure the impedance of the fault loop the instrument will detect the prospective phase PE short circuit current so the operator can determine if the overload protection is appropriate ATTENTION The resolution of the instrument is 10m when the impedance value is inside 0 01 19 99 Q so use the instrument for measurements of impedance higher of 100mQ POINTS TO BE CHECKED The test is necessary in TN or IT electrical system without RCDS ALLOWED VALUES The following relation has to be fulfilled Zs lt U la Note U Phase Earth Voltage Zs Impedance Phase Earth la tripping current of the overl
77. f the third harmonic called TRIPLENS are added together in the neutral and can cause overheating even with balanced loads Page 123 of 131 VR2250 16 11 4 Presence of harmonics consequences In general even harmonics i e the 2 4 etc do not cause problems Triple harmonics odd multiples of three are added on the neutral instead of cancelling each other thus creating a condition of overheating of the wire which is extremely dangerous Designers should take into consideration the three issues given below when designing a power distribution system that will contain harmonic current e The neutral wire must be of sufficient gauge e The distribution transformer must have an additional cooling system to continue operating at its rated capacity when not suited to the harmonics This is necessary because the harmonic current in the neutral wire of the secondary circuit circulates in the delta connected primary circuit The circulating harmonic current heats up the transformer e Phase harmonic currents are reflected on the primary circuit and continue back to the power source This can cause distortion of the voltage wave so that any power factor correction capacitors on the line can be easily overloaded The 5 and the 11 harmonic contrast the current flow through the motors making its operation harder and shortening their average life In general the higher the ordinal harmonic number the smaller its energy is and therefore
78. hase R and S e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 49 of 131 VR2250 6 5 EARTH SOIL RESISTANCE AND RESISTIVITY MEASUREMENTS vAy Turn the switch to the EARTH position it p V A The F1 key permits to select one of the following measuring modes which can be shown cyclically when pressing the key Mode 2 W the instrument measures the resistance between 2 points Mode 3 W the instrument measures the resistance using two auxiliary earth rods Mode e the instrument measures the ground resistivity At the end of each test instrument shows automatically the average value of Earth Resistance or Earth Resistivity calculated on the base of any measured values until that moment F2 key clear average value of Earth Resistance or Earth Resistivity and the counter of executed Resistance measures CAUTION Never disconnect the test leads from the circuit under test when the message MEASURING is displayed Page 50 of 131 VR2250 6 5 1 Measurement procedure and results of 2 W and 3 W mode 1 Select 2 W or 3 W Earth measurement mode by means of the F1 key 2 Connect the Red Yellow Green and Black cables to the corresponding input terminals of the instrument B1 B2 B3 B4 see possible connections in the following pictures Transf Yellow Connection for 2 point Earth Resistanc
79. he displayed result 7 The REMINDER PLACE parameter is not related to the Memar Location Measurement Order SAVE IN LOC 006 Number and can help to remind the user the OK SAVE ESC place where the measurement was REMINDER PLACE 009 performed REMINDER PARAMETER 7 l The following keys are available F3 F4 to adjust the REMINDER PLACE SAVE to store the test result associating to the actual REMINDER PLACE ESC to quit this mode without saving 9 2 SAVING DISPLAYED VALUES OF ANALYSER FUNCTION During a Real Time measurement in ANALYSER function if the user presses the SAVE button a Smp record will be generated in the ANALYZER MEMORY This file contains the Voltage and Current values present at the instrument s input when the user pressed the SAVE key Downloading these values to a PC using the management Software the Power Energy Harmonics etc values can be calculated and displayed as well Page 87 of 131 VR2250 10 RECORDINGS 10 14 START A RECORDING The recording function is available for ANALYSER and AUX rotary switch position As you can read in the paragraphs 7 2 1 and 8 2 a recording can be started manually or automatically Therefore after setting all the parameters and leaving the Menu the instrument will start to record Y MANUALLY the recording will start when the Instruments time reaches the 00 seconds value after pressing START STOP
80. hest time is to be considered as significant result The test at Yalan SHALL NEVER cause the RCD tripping NOTE 16 6 Before performing the test at the RCD rated current the instrument carries out a test at lan to measure the contact voltage and the overall earth resistance if during this test the RCD trips the indication rcd is displayed During this test the RCD may trip for three possible reasons a The RCD tripping current is lower than Yalan b An earth plate is already present on the installation which added to the earth generated by the instrument causes the RCD tripping c There is no earth installation If during measurement of contact voltage the voltage detected is higher than the safety value 50V or 25V the test is interrupted proceeding with the test under such conditions would mean to keep the contact voltage applied to all the metal masses connected to the earth for a too long time resulting to be dangerous Among the test results of the RCD tripping time also the earth resistance value Ra is displayed in Q this value for the TN and IT systems is not to be considered while for the TT systems it is merely indicative Test of RCD Tripping Time Rcd Rcd Dc PURPOSE OF THE TEST Check the real tripping time of the general RCDs it does not apply to the selective RCDs or INSTALLATION PARTS TO BE CHECKED When facing RCDs with tripping current to be selected it is useful to perform this test to check the r
81. ia 12 5 2 Howto Set Date and Timeo nori men adi et Pa anie deem um pn dx 12 5 3 How to Set the Language ennt treten tente tente tente tette nitentes ennenen netee 12 DAP RESET S nies epu Ime XII INDEM EMI 13 6 SAFETY TEST FUNCTIONS ia idus mirE ipd areae spare orat acria Eu Sr ces eb p S DEus e ub Un epucat Lis 14 6 1 LOWQ Continuity Test with 200mA Test Current ssssssssseeeene entretenir 14 6 1 1 Calibrating the test leads CAL Mode ssssseeeeeennene tentent tentent intente retener tenentes 15 6 1 2 Meas rement ProCedUre co rte e eR aara ea Aae NEEE ESE EAE aE E REE AES EREE 17 6 1 3 Results of AUTO mode ou esssecsessssssecssessesssecsessssssvecsssssessccessessessecssesseensecsseansssceeseasessecuseasesseesesasessecneesntenseeneensente 17 6 1 4 Results of RT and RES modes siete titer ti nete tene iet tnter eerte tese terree ates n Deere estado 18 6 1 5 AUTO RTH RI fa lly Cases testis nerit better tti erhebt tema Parade vie bet EE eR LE EE 18 6 2 MQ Insulation resistance Measurement with 50V 100V 250V 500V 1000V Test Voltage 20 6 2 1 Measurement rn LU cai deii 20 62 2 Hesultsof MAN MOIE u s tete ea rae erae e ernst de e Ee E erae ERE reb NER ESAS 22 6 2 3 Resultsioh TMR MOde p S 23 6 2 4 MAN and TIMER mode faulty CaS S cccscssssssssssnssesssssssssessssssussssssussssussesesseseesessesessesessusssasssa
82. ibration parameters it is necessary to perform a calibration procedure with a resistance of test leads higher than 5Q for example with open test leads Whena cancellation is performed the screen nearby is displayed along side Before each measurement always make sure that the calibration is applicable to the test leads in use During a continuity test if the resistance value free of calibration that is the resistance value is less than the calibration offset value is negative the symbol L is displayed Probably the calibration resistance value stored in the instrument memory is not applicable to the test leads in use therefore a new calibration must be performed Procedure to reset test leads calibration parameters LOWQ 05 06 01 Message gt 99 9Q means that the instrument detected a resistance higher than 5Q therefore it will proceed with A gt 99 99 R R Reset procedure Q Q P mA mA AUTO 0 11Q FUNC CAL Page 16 of 131 VR2250 6 1 2 Measurement Procedure 1 Select the desired mode by means of the F1 key 2 Connect the red and black test leads to B1 and B4 input terminals respectively START STOP afo gt BOILER SS 3 Main Earth Collector Connection of the test leads during LOWO test If the cables supplied with the instrument are not long enough for the measurement you can extend the black cable Short circui
83. if it is lt 2 of Fundamental or is lt 2 of Full Scale clamp 1 Current Harmonic its values are null if it is lt 0 2 Full Scale clamp 2 49 its values are null if it is lt 2 of fundamental or is lt 2 of Full Scale clamp LEAKAGE CURRENT MEASUREMENT Range Resolution mA Accuracy Input Impedance Overload Protection 0 5 999 9mA 0 1mA 5 Reading 2digit 200kQ 5V During a recording the instrument will detect only Current gt 5mA with Resolution 1mA Page 102 of 131 VR2250 14 2 STANDARDS 14 2 1 General Safety EN 61010 1 A2 1997 Protection classification Class 2 Double Insulation Pollution degree 2 Degree of Protection IP50 Over Voltage Category CAT II 600V 350V phase earth CAT III 600V 300V phase earth Usage Indoor max height 2000m EMC EN61326 1 1997 A1 1998 The Instrument complies with European Guidelines for CE mark 14 2 2 Safety Test LOWO 200mA IEC 61557 4 MQ IEC 61557 2 RCD IEC 61557 6 LOOP P P P N P PE IEC 61557 3 PHASE SEQUENCE IEC 61557 7 EARTH IEC 61557 5 14 2 3 ANALYSER Voltage Sag and Surge EN50160 Alternating Current Static Watt hour meters for Active Energy EN61036 CLASS 2 Alternating Current Static VAR hour meters for Reactive Energy IEC1268 CLASS 3 14 2 4 AUX Page 103 of 131 VR2250 14 3 GENERAL SPECIFICATIONS 14 3 1 Mechanical Data Dimensions Weight 1
84. ilable calculated on the basis of the parameters selected for recording therefore the most complete one expressed in the format days hours to make recordings SSS The maximum quantity of Rec R amp a Smp which can be contained by the instrument is 35 Following keys are enabled F1 F2 only if the quantity of Rec R amp a Smp is higher than 7 to run over all the recordings stored in the instrument memory v F3 to cancel the last recording performed v F4 to cancel all the recordings performed ESC to quit this mode Page 97 of 131 VR2250 12 CONNECTING THE INSTRUMENT TO A PC In order to connect the instrument to a PC you must connect the Optical serial cable that is shipped with the instrument to a PC COM port The available transmission speeds are the following 9600 19200 57600 default value The value of the transmission speed Baud Rate is displayed on the initial screen immediately after turning on the instrument see paragraph 4 2 The value of this parameter can be modified only with the management software For download instructions please refer to software help file In order to transfer the memorized data from the instrument to the PC the following procedure must be followed after software installation 1 Switch ON the instrument and wait until the initial screen disappears the rotary Switch position is not relevant 2 Connect the Optical serial output of the instrument to the
85. introduced into the network by the power supplier In normal conditions during whatever period of a week 95 if the RMS value of each harmonic voltage mediated on 10 minutes will have to be less than or equal to the values stated in the following table The total harmonic distortion THD of the supply voltage including all the harmonics up to 40 order must be less than or equal to 8 Odd harmonics Even harmonics Not multiple of 3 Multiple of 3 Order h Relative voltage Max Order h Relative voltage Max Order h Relative voltage Max 5 6 3 5 2 2 7 5 9 15 4 1 11 35 15 0 5 6 24 0 5 13 3 21 0 5 17 2 19 15 23 15 25 15 These limits theoretically applicable only for the supplier of electric energy provide however a series of reference values within which the harmonics introduced into the network by the users must be contained 16 11 3 Presence of harmonics causes Any apparatus that alters the sine wave or uses only a part of such a wave causes distortions to the sine wave and therefore harmonics All current signals result in some way virtually distorted The most common situation is the harmonic distortion caused by non linear loads such as electric household appliances personal computers or speed control units for motors Harmonic distortion causes significant currents at frequencies that are odd multiples of the fundamental frequency Harmonic currents affect considerably the
86. ion resistance test among active conductors could damage them The indication gt 1999MQ or o r out of range warns that the insulation resistance measured by the instrument is higher than the maximum resistance limit see technical specifications this result is obviously far higher than the minimum limits of the above table therefore if during a test this symbol is displayed the insulation of that point is to be considered in compliance with standards Page 111 of 131 VR2250 16 3 Check of the Circuit Separation PURPOSE OF THE TEST The test to be performed in case the protection is realised through separation 64 8 6 612 4 SELV or PELV or electrical separation shall check that the insulation resistance measured according to the indications below depending on the separation type complies with the limits reported in the table relative to the insulation measurements INSTALLATION PARTS TO BE CHECKED e SELV system Safety Extra Low Voltage Y Measure the resistance between the active parts of the circuit under test separate and the active parts of the other circuits Y Measure the resistance between the active parts of the circuit under test separate and the earth The resistance shall not be lower than 0 25MQ with a test voltage of 250VDC e PELV system Protective Extra Low Voltage Y Measure the resistance between the active parts of the circuit under test separate and the active parts of the other circu
87. ious functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement to record the selected parameters according to the instrument s settings see chapter 10 Page 73 of 131 VR2250 8 4 3 HARM mode Selecting the HARM mode the screen below will be displayed according to the settings made as per paragraph 8 1 The screen shows the harmonics see paragraph 16 11 of the voltage 27 09 00 LP Sek Example of screen The symbols used are described in Tab 1 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED The displayed histograms represent the harmonic content of the voltage under test The value of the first harmonic h01 fundamental at 50Hz is not represented in scale along with the other harmonics in order to maximize the display of the latter In both cases voltage and current are connected to the instrument inputs eventual negative values of the harmonics therefore represented under the horizontal axis indicate that such voltage harmonics are generated by the load Following keys are enabled ce q F3 F4 F2 ESC
88. is test is to be preceded by a visual check verifying the existence of yellow green protective and equalising potential conductors as well as compliance of the sections used with the standards requirements INSTALLATION PARTS TO BE CHECKED Equalsing potential Node Connect one of the test leads to the protective conductor of the FM socket and the other to the equalising potential node of the earth installation Connect one of the test leads to the external mass in this case the water pipe and the other to the earth installation using for example the protective conductor of the closest FM socket MARVR2250 Examples for continuity measurement on conductors Page 107 of 131 VR2250 Check the continuity among a Earth poles of all the plugs and earth collector or node b Earth terminals of class instruments Boiler etc and earth collector or node c Main external masses water gas pipes etc and earth collector or node d Auxiliary external masses to the earth terminal ALLOWABLE VALUES The standards CEI 64 8 6 do not give any indication on the maximum resistance values which cannot be overcome in order to be able to declare the positive outcome of the continuity test The standard CEI 64 8 6 simply requires that the instrument in use warns the operator if the test was not carried
89. its The resistance shall not be lower than 0 25MQ with a test voltage of 250VDC e Electrical separation Y Measure the resistance between the active parts of the circuit under test separate and the active parts of the other circuits Y Measure the resistance between the active parts of the circuit under test separate and the earth The resistance shall not be lower than 0 5M with a test voltage of 500VDC and 1MQ with a test voltage of 1000VDC Page 112 of 131 VR2250 EXAMPLE OF CHECKING THE SEPARATION AMONG ELECTRICAL CIRCUITS Insulation or safety transformer making the separation among the circuits Between the active parts of the separated circuit Test among the active parts Connect a test lead of the instrument to one of the two conductors of the Separate circuit and the other to one of the conductors of a non separate circuit v And among those N other circuits Equalising potentialo Test between node the active parts and the earth Connect a test lead of the instrument to one of the two conductors of the Separate circuit and the other to the equalising potential node This test is to be effected only for SELV circuits or with electrical separation Earth installation MARVR2250 Measurement of separation among the installation circuits Page 113 of 131 VR2250 ALL
90. key using the F1 F2 keys select the ANALYZER CONFIG item and press the ENTER Key The following screen will be displayed SYSTEM Rayer FREQUENCY 50HZ CURRENT RANGE 1000A CLAMP TYPE STD TV RATIO 0001 PASSWORD ON i T These settings can be confirmed by pressing the ENTER key or cancelled by pressing the ESC key 8 1 1 Type of electrical system under test The parameter SYSTEM is fixed to SINGLE value as GENIUS 5080E is able only to analyse a Single Phase system 8 1 2 How to set the fundamental frequency Position the cursor on the corresponding word by pressing the multifunction keys F1 and F2 and select the network frequency between the possible values 50Hz and 60Hz by pressing the multifunction keys F3 and F4 This parameter is important ONLY if the input voltage is not sufficient to recognise the value of the frequency for example only the clamps for the current measurement are connected In this case the instrument generates an internal synchronism equal to the value of the set frequency 8 1 3 How to set the current range The value of this parameter must always be equal to the full scale of the current clamp used to take the measurement If a multi scale clamp is used the value of this parameter must be equal to the scale selected on the clamp Set the desired value by pressing the multifunction keys F3 and F4 8 1 4 Clamp Type The value of this parameter shows that only Standard clam
91. la f 220 Formula for calculation of prospective short circuit current Working mode U I CC pu Where Un Nominal phase to neutral voltage 127 if Vmeas lt 150 230 if 150V Vineas 250 e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 42 of 131 VR2250 6 4 5 Measurement procedure and results of Rat mode 1 Select Rat mode by means of the F1 key 2 Connect the Red Green and Black connectors of the three terminal mains cable or of the split cables to the corresponding input terminals of the instrument B1 B3 B4 Instrument connection for P PE in a 400V three single phase System phase system 3 Connect the mains plug into a 230V 50Hz socket or the crocodiles to the conductors of the three phase system see previous pictures 4 f possible disconnect all low impedance loads downstream of the point at which the measurement is to be taken as such impedance would be in parallel with the line impedance to be measured 5 The key F4 permits to select one of the following limit values for the contact voltage which can be shown cyclically when pressing the key 50V default v 25V 6 Press the START key once to execute a test with 0 test current or Press the START key twice to execute a test with 180 test current CAUTION The Ra measurement make a test current of 15mA This may
92. low conventions must be applied The stated angles are those of phase displacement of the current compared to the voltage for example in the first panel the current is in advance from 0 to 90 compared to the voltage Equipment under test Inductive Generator Equipment under test Capacitive Load 90 P 20 P P P P P 0 Pfc 1 Pfc 1 Pfc Pf Pfc 1 Pfi 1 Pfi Pf Pfi 1 Pfi 1 Qc 0 Qc 0 Qc Q Qc 0 Qi 0 Qi Q Qi 0 Qi 0 180 0 P 0 P P P P P 0 Pfc 1 Pfc Pf Pfc 1 Pfc 1 Pfi 1 Pfi 1 Pfi Pf Pfi 2 1 Qc 0 Qc Q Qc 0 Qc 0 Qi 0 Qi 0 Qi Q Qi 0 270 Equipment under test Capacitive Generator gt Equipment under test Inductive Load Where Symbol Significance Remarks P Value of the active power Pfc Capacitive power factor Positive parameter Pfi Qc Inductive power factor user Value of the capacitive reactive power Qi Value of the inductive reactive power P Value of the active power Pfc Capacitive power factor Negative parameter Pfi Inductive power factor generator Qc Qi Value of the capacitive reactive power Value of the inductive reactive power Value Significance P The active power positive or negative is defined in the panel and therefore acquires the value of the active power in that moment Q The reactive power inductive or capacitive
93. n of instrument consists in the following parameters settings v ANALYZER CONFIG System SINGLE Frequency 50Hz Current Range 1000A Clamp Type STD TV Ratio 1 Password enabled v RECORDER CONFIG Start MANU the recording is started 1 minute after pressing the START STOP key Stop MANU Integration period 15min Recording of harmonics ON Recording of Voltage anomalies voltage Sag and Surge ON Voltage Reference for Sag and Surge detection 230V Upper Limit for Sag and Surge detection 6 Lower Limit for Sag and Surge detection 10 Selected voltages V1 Selected voltage harmonics THD 01 03 05 07 Selected currents H Selected current harmonics THD 01 03 05 07 CO GENERATION OFF Powers Pf and cos selected P1 Qti Qic S1 Pf dpf1 Energies Ea1 Eri1 Erc1 If the user changed the instrument s settings the user can quickly resume the above configuration using the RESET option see paragraph 5 4 Page 89 of 131 VR2250 By pressing START STOP the recording of the selected parameters is started according to the settings made in the MENU see paragraphs 8 1 and 8 2 The rotary switch position doesn t affect the recording setting As the default value of the integration periods is set at 15 minutes the instrument will store data in the temporary memory for 15 minutes Afterwards the instrument will elaborate the results saved in the temporary memory and will save the result of this elaboration min
94. n this case interrupt testing and replace batteries following the procedure described under paragraph 13 2 The instrument is capable of keeping the data stored even though batteries are not installed The Instrument Date and Time settings aren t lost if you change the batteries within 24hours Page 8 of 131 VR2250 CAUTION For recordings ANALYSIS and AUX function it is recommended to ALWAYS use the external power supply adapter optional code MAR although the instrument does allow the operator to perform a recording using internal batteries If during a recording the external power supply adapter is de energised the instrument will continue the recording using the internal battery power until the batteries are exhausted the data stored up to the point the instrument shuts down won t get lost It is recommended to ALWAYS insert a new set of batteries before a long recording The instrument uses sophisticated algorithms to prolong the battery life Particularly Y The instrument switches OFF the backlight automatically after 5 seconds v Ifthe instrument is displaying in real time and the external power supply adapter is not connected after about 5 minutes from the last key press or switch rotation the instrument turns off automatically AUTOPOWER OFF procedure v fthe instrument is recording or is measuring energy and the external power supply is not connected after about 5 minutes from the last key pressure or
95. nction updating interruption of the displayed data When the HOLD function is enabled the word is displayed This key is disabled during a recording It s not possible to run a recording if this function is enabled e 7 The displayed result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 58 of 131 VR2250 7 2 LEAKAGE CURRENT RECORDING Before starting a recording we recommend the user checks that real time values are correct For this purpose follow the measurement procedure described in paragraph 7 1 In addition it s fundamental that Instrument settings correspond to the accessories in use For this we recommend the user checks the instrument s setting before executing an AUX recording To this purpose please check the RECORDER CONFIG settings MENU to enter in the MENU mode and change the instrument settings It s not possible to enter the configuration MENU during a recording or an energy measurement START STOP to record the selected parameters according to the instrument s settings see chapter 10 7 2 1 AUX Basic setting RECORDER CONFIG Place the rotary switch in the AUX position press the MENU key using the F1 F2 keys select the RECORDER CONFIG item and press the ENTER Key CAUTION It s not possible to enter the MENU during a recording or a Real Time Energy measurement MENU GENERAL SAFETY TEST MEMORY ANALYZER MEMORY RESET ANALYZER CONFIG RECORDER C
96. neutral wire of electric installations In most countries the mains power is three phase 50 60Hz with a delta primary and star secondary transformers The secondary generally provides 230V AC from phase to neutral and 400V AC from phase to phase Balancing the loads on each phase has always represented an headache for electric systems designers Until some ten years ago in a well balanced system the vectorial sum of the currents in the neutral was zero or quite low given the difficulty of obtaining a perfect balance The devices were incandescent lights small motors and other devices that presented linear loads The result was an essentially sinusoidal current in each phase and a low current on the neutral at a frequency of 50 60Hz Modern devices such as TV sets fluorescent lights video machines and microwave ovens normally draw current for only a fraction of each cycle thus causing non linear loads and subsequent non linear currents All this generates odd harmonics of the 50 60Hz line frequency For this reason the current in the transformers of the distribution boxes contains only a 50Hz or 60Hz component but also a 150Hz or 180Hz component a 50Hz or 300Hz component and other significant components of harmonic up to 750Hz or 900Hz and higher The vectorial sum of the currents in a well balanced system that feeds non linear loads may still be quite low However the sum does not eliminate all current harmonics The odd multiples o
97. ng the corresponding reactive energies will be selected Press ENTER to leave this screen confirming the modifications made Press ESC to leave the Menu without modifying the existing parameters The various screens of the RECORDER CONFIG can be schematised as follows Page 65 of 131 VR2250 cg VeV Use the multifunction keys F1 F2 to position the cursor on the desired symbol and use the multifunction keys F3 F4 to select deselect the desired parameter it s selected if marked in black Press ENTER to confirm and leave the Menu keeping the settings made Press ESC to leave this page without modifying the existing parameters cg ENTER To Select MANUAL or AUTOMATIC start stop mode place the cursor on MANU or AUTO using the multifunction key F1 or F2 and select the desired mode using F3 or F4 RECORDER CONFIG START STOP MANU Use the multifunction keys F1 F2 to position the cursor on the desired word and use the multifunction keys F3 F4 to modify the value Press ENTER to confirm the settings on this screen and proceed to the next Menu keeping the settings made Press ESC to leave this page without modifying the existing parameters INT PERIOD 15min HARM REC ON ANOM REC ON 1 screen of the RECORDER CONFIG MENU RECORDER CONFIG VOLTAGE HARM REC Pg ON Vref P N 230V LI
98. nt RCD type e The test can be stored pressing the SAVE key twice according to paragraph 9 1 Page 31 of 131 VR2250 6 3 2 5 Results of RAL mode 4 Press the START key once the instrument carries out the test CAUTION Never disconnect the test leads when the message MEASURING is displayed The RCD must NOT trip and the instrument emits a double sound RCD 05 06 01 Global Earth Resistance signal indicating the Value positive outcome of 1 2 the test and displays the Q Value of contact voltage U screen alongside detected referred to the rated value of the RCD FRQ 50 0Hz Ut 1v current set VP N 231V VP PE 231V Pn aa OK Contact Voltage Not _ Dangerous RAQ 30mA 50V FUNC IAN E Contact Voltage Limit value Working mode RCD nominal current RCD type e The test can be stored pressing the SAVE key twice according to paragraph 9 1 Page 32 of 131 VR2250 6 3 3 RCD Faulty cases 6 3 3 1 Connection troubles lf the instrument detects RCD 05 06 01 the External Power supply adapter connected the ms Disconnect the External instrument will show the Power Supply Adapter message displayed ORE Venues along side N REMOVE POWER xl 30m 50V FUNC IdN RCD UL Should the instrument detect that the phase and or neutral cables are not connected to an
99. o disconnect the users from the installation before performing the insulation resistance test ATTENTION If the installation includes electronic devices disconnect them from the installation and in case this is impossible only the test a is to be performed that is to say between active conductors which in this case SHALL be connected together and the earth Page 110 of 131 VR2250 ALLOWABLE VALUES The values of test voltage and minimum insulation resistance are reported in the following table CEI64 8 6 Tab 61A SELV and PELV 250 20 250 Up to 500 V included except for the above circuits Over 500 V n the new standards the terms SELV and PELV replace the old definitions safety low voltage or functional Table 6 Table summarising the test voltage values and relative limit values for the most common types of test NOTE If the circuit is quite large the conductors running side by side make up a capacity which is to be charged by the instrument in order to carry out a correct measurement in this case it is recommended to keep the GO key pressed in case a test is performed under manual mode until the result gets stable ATTENTION When you effect measurements among active conductors it is essential to disconnect all the users alarm lamps intercom transformers boilers etc otherwise the instrument will measure their resistance instead of the installation insulation Moreover any insulat
100. oad protection in 5 seconds Page 118 of 131 VR2250 16 9 Earth Resistivity Measurement PURPOSE OF THE TEST This test aims at analyse the resistivity value of the ground in order to define the type of rods to be used EQUIPMENT PARTS TO BE TESTED For the resistivity test admissible values do not exist The various values measured by positioning the rods at growing distances a must be quoted in a graph According to the resulting curve suitable rods will be chosen As the test result can be affected by metal parts buried such as pipes cables or other rods in case of doubts take a second measurement positioning the rods at an equal distance a but rotating their axis by 90 2 measurement Compared to the previous measurement the rods are rotated by 90 1 measurement The rods are positioned at a distance a Yellow Red Black Green ae The resistivity value is calculated with the following formula p 27aR Where p specific resistivity of the ground a distance between the rods m R resistance measured by the instrument Q Page 119 of 131 VR2250 The measuring method allows defining of the specific resistance up to the depth corresponding approximately to the distance a between the rods If you increase the distance a you can reach deeper ground layers and check the gr
101. ode P N the instrument measures the impedance between the phase and neutral conductors and calculates the phase to neutral prospective short circuit current Mode P P the instrument measures the impedance between two phase conductors and calculates the phase to phase prospective short circuit current Mode P PE the instrument measures the impedance between the phase and protective conductors and calculates the phase to earth prospective short circuit current Mode RaQ the instrument measures the impedance between the phase and protective conductors with a test current of 15mA in order to avoid RCD tripping and calculates the phase to earth prospective short circuit current Mode the instrument detects the Phase Sequence in a three phase system CAUTION Never disconnect the test leads when the message MEASURING is displayed 6 4 1 High resolution Impedance measurement 0 1mQ The MARVR2250 model is connectable to an external optional accessory IMP57 useful for high resolution impedance measurement close to a power transformer The high Resolution impedance measurement is available inside the LOOP P P P N P PE modes by mean Un IAn key If you enable the High Resolution Impedance Measurement mode without connecting IMP57 the following screen will be displayed e g Loop P N Z Q R Q X Q IkSTD A V1 2 OV FRQ 0 0Hz yN NO IMP57 P N Z2 0 FUNZ ZSTD ICAL
102. odified Clamp Type STD TV Ratio not modified Password not modified v RECORDER CONFIG Start MANU the recording is started 1 minute after pressing the START STOP key Stop MANU Integration period 10min Recording of harmonics ON Recording of Voltage anomalies voltage Dips and Surge OFF Selected voltages V1 Sel Harmonics voltage THD DC 01 03 05 07 09 11 13 15 17 19 21 23 25 Selected current 11 Sel Harmonics current THD DC 01 03 05 07 09 11 13 15 17 19 21 23 25 CO GENERATION OFF START UP Y ANALYZER CONFIG System SINGLE Frequency 50Hz Current Range not modified Clamp Type STD TV Ratio not modified Password not modified v RECORDER CONFIG Start MANU the recording is started 1 minute after pressing the START STOP key Stop MANU Integration period 5sec Recording of harmonics ON Recording of Voltage anomalies voltage Dips and Surge ON Voltage Reference for Dips and Surge detection 230V Upper Limit for Dips and Surge detection 6 Lower Limit for Dips and Surge detection 10 Selected voltages V1 Selected voltage harmonics THD 01 03 05 07 09 11 13 15 Selected currents 11 Selected current harmonics THD 01 03 05 07 09 11 13 15 CO GENERATION OFF Powers Pf and cosq selected P1 Qti Q1c S1 Pf dpf1 Energies Ea1 Eri1 Erc1 Page 92 of 131 VR2250 POWER amp ENERGY Y ANALYZER CONFIG System Frequency Current Range Clamp Type TV Ra
103. ommend that you check the Calibration of the test leads before executing a measurement according to the next paragraph 6 1 1 Page 14 of 131 VR2250 6 1 1 Calibrating the test leads CAL Mode 1 Connect the Red and Black test leads to B1 and B4 input terminals respectively Connection of the test leads during calibration procedure 2 If the test leads supplied with the instrument are not long enough for the measurement you can extend the black cable 3 Short circuit the measuring cable ends making sure that the conductive parts of the crocodiles make a good contact to each other see previous picture 4 Press the F2 key The instrument carries out the calibration CAUTION Never disconnect the test leads when the message MEASURING is displayed LOWO 05 06 01 A numerical value in this field means QO that the instrument m RN has been calibrated this R R lue remains on guo NS value yah seek the display for V jaw further Q measurement eee ee even though the FUNC CAL unit is switched off and on again 5 At the end of the test the result is stored and used as OFFSET that is to say that it is subtracted from any continuity test carried out for all the subsequent measurements Note The instrument performs the calibration only if the resistance of the test leads is lower than 5Q Page 15 of 131 VR2250 TEST LEADS 6 1 1 1 To cancel cal
104. omponent 01 49 THD 01 03 05 07 Page 70 of 131 VR2250 ON the instrument is able to face situations of CO GENERATION of electrical equipment that is the equipment under test is able to generate energy besides absorbing it Accordingly the instrument will record the powers and energies both absorbed CO GENERATION and generated see paragraph 16 12 1 If this flag is enabled the maximum number of parameters which can be selected decrease to 38 OFF the instrument will record ONLY the powers and energies absorbed P1 Active Power P1 Qti Inductive Reactive Power Qic Capacitive Reactive Power ongie S1 Apparent Power S1 Pf1 Power factor DPft1 cos Pf1 dPf1 Eat Active energy Eat Eri1 Inductive reactive energy Eril Erct Erc1 Capacitive reactive energy The value of the network frequency is automatically selected if the voltage is selected The symbols i and c stand for reactive powers Q power factors Pf and cose dpf inductive and capacitive respectively Selecting a power factor Pf or a cosq dPf for recording automatically their inductive value and their capacitive value will be recorded separately For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Page 71 of 131 VR2250 8 3 ANALYSER FUNCTIONS For a simple usage the main working mode of the ANALYSER mode can be selected by means of F3 and F4 VOLTAGE
105. ound homogeneity After several p measurements at growing distances a you can trace a profile like the following ones according to which the most suitable rod is chosen Curve1 as p decreases only in depth it s possible to use only a rod in depth Resistivitv Qm Curve2 as p decreases only until the depth A it s not useful to increase the depth of the rod beyond A Curve3 even at a superior depth p does not Earth rods distances a m decrease therefore a ring rod must be used APPROXIMATE EVALUATION OF THE CONTRIBUTION OF INTENTIONAL RODS 64 12 2 4 1 The resistance of a rod Rd can be calculated with the following formulas p medium resistivity of the ground a Resistance of a vertical rod Rd p L L length of the element touching the ground b Resistance of a horizontal rod Rd 2p L L length of the element touching the ground c Resistance of linked elements The resistance of a complex system with more elements in parallel is always higher than the resistance which could result from a simple calculation of elements in parallel especially if those elements are close and therefore interactive For this reason in case of a linked system the following formula is quicker and more effective than the calculation of the single horizontal and vertical elements Rd p 4r r radius of the circle which circumscribes the link Page 120 of 131 VR2250 16 10 VOLTAGE ANOMALIES VOLTAGE S AND SURGE
106. owever available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement to record selected parameters according to the instrument s settings see chapter 10 Page 84 of 131 VR2250 8 8 MEASURING PROCEDURES 8 8 1 Using the Instrument in a Single Phase System CAUTION The maximum voltage between B1 and B4 inputs is 600 V CATII 350V N phase earth or 600V CATIII 300 V phase to earth Do not measure voltages exceeding the limits prescribed by this manual Should you exceed the voltage limits you could damage the instrument and or its components or endanger your safety gt Phase Fu a TIME TER Instrument connection in a single phase system CAUTION T If possible before connecting the instrument to the electrical equipment to be tested take the power supply off the electrical equipment 1 Check and if needed modify the basic settings of the instrument see paragraphs 8 1 and 8 2 2 Select the working mode corresponding to the type of analysis desired In case of doubts select the POWER working mode see paragraph 8 6
107. owing table shows the description of each function inside the RECORDER CONFIG menu Function Description Advised settings The recording of all the selected parameters will start at 00 START MAN seconds after pressing START STOP The recording of all the selected parameters will be interrupted POE MAN manually by pressing START STOP The recording of all the selected values will be started interrupted START AUTO at the set dates and times In order to start the recording the user STOP AUTO will have to press START STOP to set the instrument in Stand by mode until the start date and time previously set The value of this parameter determines every how many seconds 45min INT PERIOD the values of the selected parameters will be memorised see paragraph 16 13 1 Available choices 5sec 10sec 30sec 1min 2min 5min 10min 15min 30min 60min For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Page 60 of 131 VR2250 7 2 2 RECORDING setting of Typical Configurations The following Typical Configurations are selectable via RECORDER CONFIG menu Standard Configuration Description LEAKAGE l1 Setting of measuring and recording mode of Leakage current on I1 channel To activate the above configuration follow this procedure 1 Turn the rotary switch to AUX 2 Press MENU key Use the F1 key to display the screen below MENU GENERAL SAFETY
108. phase 180 even with no AUTO modes If the RCD under test is A type which means sensitive to both AC and undirectional pulsing leakage currents it is advisable to effect the test both with sine wave and undirectional pulse current with phase 0 and 180 Page 25 of 131 VR2250 The F2 key permits to select one of the following rated tripping currents of the RCD which can be shown cyclically when pressing the key 10mA 30mA 100mA 300mA 500mA The F3 key permits to select the RCD type which can be shown cyclically when pressing the key gcc q general RCD AC type sensitive to sine leakage current oe g general RCD A type sensitive to pulsating leakage current au selective RCD AC type sensitive to sine leakage current KU selective RCD A type sensitive to pulsating leakage current Note if the test is performed on general RCDs the symbol Uu is NOT displayed Note according to EN61008 the test on the selective RCDs requires an interval between the tests of 60 seconds 30 seconds in case of tests at 2 lan A timer is displayed indicating the waiting time for each step Example Test with AUTO mode on a RCD with lan 30mMA a The instrument performs the test at 1 2 lan 0 The RCD must not trip b The instrument performs the test at 1 2 lan 180 The RCD must not trip For a Selective RCD a 30 seconds timer starts before executing next test c The instrument performs the test at lan
109. phases are connected together FUNC THE PREVIOUS RESULTS CANNOT BE SAVED Page 48 of 131 VR2250 n the mode P P P N mode the instrument carries out the test and detects a resistance to be higher than 199 90 the screen alongside is displayed LOOP 05 06 01 Message gt 199 9 means that the Resistance measured is higher than the maximum measurable FRQ 50 0HZ VP N 1V Vp PE P N FUNC Z20 e This result can be stored pressing the SAVE key twice according to paragraph 9 1 n the mode P PE RaQ mode the instrument carries out the test and detects a resistance to be higher than 19990 the screen alongside is displayed LOOP 05 06 01 gt 19990 A FRO 50 0HZ VP N 1V Vp PE OV RAQ 50V FUNC UL Message gt 1999 means that the Resistance measured is higher than the maximum measurable e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Inthe mode if the voltage of one or more phases is too low one or more phases has a low voltage the instrument will show a screen similar to the one alongside LOOP 05 06 01 RTS FRO 50 0HZ VR S 391V VS T OV VT R OV NOT CORRECT Q FUNC Phase Sequence not correct Message LOW Voltage Phase T means that Phase T has a low voltage value Similar message for P
110. pported 3 Connect the External Flexible Clamp to the In1 instrument s input 4 Check if the selector on the probe or clamp is adjusted according to the range set in the instrument Both ranges must be set to the same value Example of External probes connections CAUTION The OFF position of some probes sends to probe s output the Battery voltage approx 9V which is over the expected full scale This could influence the measurement of the other instrument s inputs So NEVER leave connected to instrument probes with the Selector placed in OFF position Page 57 of 131 VR2250 PE Protection Cunductor SINGLE PHASE PHASE NEUTRAL Indirect Leakage Current measurement in a single phase system PHASE NEUTRAL SINGLE PHASE PE Protection Cunductor 1 DISCONNECT ADDITIONAL GROUNDING AA B B B Direct Leakage Current measurement in a single phase system PE Protection Cunductor THREE PHASE AABI Bo B Indirect Leakage Current measurement in a three phase system R S T N PE Protection Cunductor THREE PHASE 1 DISCONNECT ADDITIONAL GROUNDING AA B B B Direct Leakage Current measurement in a three phase system 5 The Instrument shows in real time the values present at the inputs Example of screen In1 23 mA 11 43 04 Example of Input Signal 1 AUX Inl PGF a 6 Press this key to enable disable the HOLD fu
111. ps STD or Current Transformers are available for this instrument This parameter cannot be modified by the user 8 1 5 How to set the value of the transformer voltage ratio TV RATIO The instrument can also be interfaced with step down transformers in the equipment under test It can display the value of the voltages present on the primary winding of these transformers To do this it will be necessary to set the value of the transformers windings ratio from 2 1 to 3000 1 The default is set at 1 1 for measurements of none transformer systems Select TV RATIO in the ANALYZER CONFIG menu Set the desired value by pressing the multifunction keys F3 and F4 Page 63 of 131 VR2250 8 1 6 How to enable disable the password The instrument is provided with a protective routine to avoid the risk of being disturbed or interrupted during a recording or an energy measurement Once a recording or a direct energy measurement has been started with the option PASSWORD enabled after about 3 minutes from the last key pressure or switch rotation it won t be possible to press START STOP to stop the recording PASSWORD will be displayed and it will be necessary to insert the password In order to insert the password which is not changeable press the multifunction keys in the following sequence within 10 seconds F1 F4 F3 F2 If you wait more than about 10 seconds the display will return to the meter mode and the instrument will contin
112. ral x1 30m 50V Conductors are reversed FUNC IdN RCD UL RCD 05 06 01 ms FRQ 50 0Hz Ut V VP N 2V VP PE 230V x1 30mA 50V el Phase and Protection Conductors are reversed FUNC IdN RCD UL x1 FRQ 50 0Hz VP N 130V VP 1 30mA 05 06 01 ms V Ut 227V B P 50V Neutral and Protection Conductors are reversed FUNC IdN RCD UL Page 34 of 131 VR2250 If a contact voltage Ut higher than the selected limit U is detected the instrument interrupts the test and emits a long sound signal at the end of the test and displays the screen alongside If the instrument detects that the earth cable green is not connected the screen alongside is displayed for 5 seconds then the initial display is back Check the connections of PE conductor under test If the instrument gets overheated tests cannot be carried out and the message alongside is displayed Wait until the initial screen is back in order to proceed with measurements RCD FRO x1 VP N 234V VP PE 05 06 01 ms 50 0Hz Ut V 234V AX UT DANGEROUS 30mA 50V The instrument doesn t detect an efficient protection circuit FUNC IdN RCD UL FRO VP N 234V VP PE xl 30mA 50V 05 06 01 ms 50 0Hz Ute V 34V Mes
113. rent clamp 1 100 1000A 1V diameter 54 mm Page 105 of 131 VR2250 15 SERVICE 15 1 WARRANTY CONDITIONS This instrument is guaranteed against any defect in material and manufacturing in compliance with the general sales terms and conditions Throughout the period of guarantee all defective parts may be replaced and the manufacturer reserves the right to repair or replace the product If the instrument is to be returned to the after sales service or to a dealer transportation costs are on the customer s behalf Shipment shall be however agreed upon A report must always be enclosed with a rejected product stating the reasons for its return To ship the instrument use only the original packaging material any damage that may be due to non original packing shall be charged to the customer The manufacturer declines any responsibility for damages caused to persons and or objects Warranty is not applied in the following cases Any repair that might be necessary as a consequence of a misuse of the instrument or of its use with non compatible devices Any repair that might be necessary as a consequence of improper packaging Any repair that might be necessary as a consequence of service actions carried out by unauthorised personnel Any modification of the instrument carried out without the authorisation of the manufacturer Use not provided for in the instrument s specifications or in the instruction manual ee ee Th
114. rmonic 01 Harmonic 49 of voltage or current ThdV Factor of total harmonic distortion of the voltage see paragraph 16 11 Thdl Factor of total harmonic distortion of the current see paragraph 16 11 P1 Active power Q1i Inductive Reactive power Qic Capacitive Reactive power S1 Apparent power pf1 Power factor dpf1 coso Eat Active energy Eri1 Inductive reactive Energy Erc1 Capacitive reactive Energy VR2250 Other products available from Martindale Electric CE 16th Edition Testers Multifunction Testers Calibration Equipment Continuity Testers Electrician s Kits Full Calibration and RepairService Fuse Finders Digital Clamp Meters Digital Multimeters Microwave Leakage Detectors MotorMaintenance Equipment Non Trip Loop Testers Pat Testers amp Accessories Phase Rotation Proving Units Socket Testers Thermometers amp Probes Test Leads Voltage Indicators Specialist Metrohm Testers 4 amp 5kV Specialist Drummond Testers Martindale Electric Company Limited Metrohm House Penfold Trading Estate Imperial Way Watford WD24 4YY UK Tel 44 0 1923 441717 Fax 44 0 1923 446900 E mail sales martindale electric co uk Website www martindale electric co uk Martindale Electric Company Ltd 2010 LIT2250 Rev 2 Registered in England No 3387451
115. rned off During a recording the following are disabled v AUTOPOWER OFF function Y ON OFF key v HOLD key Y SAVE key 10 3 1 MENU key If you press the MENU key during a recording the following screen will appear INFO REC n XX START 09 18 01 11 35 STOP 13 18 01 12 00 INT PERIOD 15min REC PERIODS 00004 REC TIME 139d 02h HARM REC ON ANOM REC ON N ANOMALIES 00000 This screen includes START Date and Time STOP Date and Time or Manual Integration Period Actual Number of Elapsed Integration Periods Actual Recording Time Status of Harmonic Flag Status of Voltage Anomalies Flag Number of Voltage anomalies occurred during the recording SO PED Uds po N Page 94 of 131 VR2250 10 3 2 Rotary Switch during a recording If you move the rotary switch during a recording the following screen will appear This screen means that a recording is running but the actual rotary switch position does not correspond to this The instrument will continue to record 10 4 STOPPING A RECORDING OR AN ENERGY MEASUREMENT The instrument uses a protective routine to avoid the risk of being disturbed or interrupted during a recording or an energy measurement Once a recording or a direct energy measurement see paragraph 8 7 2 has been started with the option PASSWORD enabled after about 3 minutes from the last key pressure or switch rotation it won t be sufficient to press START STOP if a recording is
116. running or F2 if an energy measuring is running to stop the recording it will be necessary to insert the password In order to insert the password which is not changeable press the multifunction keys in the following sequence within 10 seconds F1 F4 F3 F2 In order to enable disable this option see paragraph 8 1 If a wrong password is inserted the instrument will display an error message and will repeat the request If no key is pressed after about 10 seconds the instrument returns back to the original screen Page 95 of 131 VR2250 11 INSTRUMENT S MEMORY By pressing the MENU key the following screen will be displayed SAFETY TEST MEMORY ANALYZER MEMORY RESET ANALYZER CONFIG RECORDER CONFIG CONTRAST DATE amp TIME LANGUAGE l T Its not possible to enter the MENU during a recording or a Real Time Energy measurement 11 1 SAFETY TEST MEMORY Selecting the SAFET TEST MEMORY item and pressing ENTER the instrument displays the following screen SAFETY TEST MEMORY MEM TYPE PLACE 001 LOWO 003 002 EARTH 003 003 MQ 004 004 RCD 004 005 LOOP 001 TOT 005 FREE 994 T LAST ALL Example of SAFETY TEST MEMORY screen MEM Order Number of the measurement TYPE Measurement TYPE PLACE Mnemonic parameter associated by User to Measurement TOT Total Number of Measurements FREE Available Memory Location NSSSS Following keys are enabled F1 F2
117. sage NO PE the instrument doesn t detect an efficient protection circuit FUNC IdN RCD UL RCD 05 06 01 ms FRQ 50 0Hz Ut V VP N 231V VP PE 230V xl 500mA 50V FUNC IdN RCD UL Message hot the instrument got overheated THE PREVIOUS RESULTS CANNOT BE SAVED Page 35 of 131 VR2250 Using the RaQ function if a contact voltage Uy higher than the selected limit UL is detected the instrument emits a long sound signal at the end of the test and displays the screen alongside 05 06 01 1800o FRO 50 0Hz Ut VP N 234V VP PE The instrument does not detect an efficient RO 30mA 50V protection circuit FUNC IdN RCD UL 6 3 3 2 The test can be stored pressing the SAVE key twice according to paragraph 9 1 RCD tripping faulty cases fthe RCD trips during RCD the preliminary test performed before the test independently from the working mode the instrument displays the screen alongside 05 06 01 ms The RCD trips too early Check if the RCD Nominal FRQ 50 0Hz Ut V Current is correct VP N 231V VP PE 230V Some leakage currents A RCD TRIPS may be present in the E installation Disconnect all x1 30mA 50V the loads connected FUNC IdN RCD UL downstream the RCD THE PREVIOUS RESU
118. seconds If the instrument cannot generate the Nominal Test Voltage it will emit a long acoustic signal and displays a screen similar to the screen alongside 05 06 01 MQ V Is 500V VNOM MAN FUNC 05 06 01 MQ VOLT IN INPUT MAN 500V FUNC VNOM Disconnect the External Supply Adapter Power ATTENTION the test cannot be executed Check that the circuit is not energised These results cannot be saved MO 05 06 01 A1 17 MQ Insulation Resistance e m the test of resistance Riso was performed at a voltage value lower than the set rated voltage Low insulation case This case 107V 15s occurs under low insulation conditions or in the presence of MAN 500V capacity on the installation FUNC VNOM Test Time The displayed result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 24 of 131 VR2250 6 3 RCD TEST ON A AND AC RCDS TYPE The test is executed according to IEC61557 6 EN61008 EN61009 EN60947 2 B 4 2 4 and VDE 0413 part 6 CAUTION The automatic check of the RCD features causes the tripping of the RCD itself Therefore check that all devices connected downstream of the RCD under test are not damaged by power off Possibly disconnect all the loads connected downstream of the RCD as they could add additional leakage currents to
119. sesasecseesseansasaeeass 24 6 3 RCD Test on A and AC RODS Type tenente terere tenerent tente tte retentis ttes 25 6 3 1 Tripping times for the general and selective RCDS ssssssssssssseeeeenenentente retener tenente 27 6 3 2 Measurement procedure ned iieii aa te lecto e Do ea Pe a ede be P He c pe P ee cua 28 ISRAEL URN TEIN A ee 33 6 4 LOOP 9 Measurement of Line Impedance Fault loop Impedance Prospective Short Circuit Current Calculation and Phase Sequence Indicator sse teet 38 6 4 1 High resolution Impedance measurement 0 1m 2 ssssssseseseene tentent tentent ttti nien 38 6 4 2 Measurement procedure and results of P N mode sssssssssseseeene tenente terere nter ntes 39 6 4 3 Measurement procedure and results of P P mode nennen tnnd 40 6 4 4 Measurement procedure and results of P PE mode ssssssssssseeene nette nter nter tenentes 41 6 4 5 Measurement procedure and results of m MOO c 43 6 4 6 Measurement procedure and results of Hus 44 0 4 7 WOOP Faulty OO 45 6 5 EARTH Soil Resistance and Resistivity Measurements sss 50 6 5 1 Measurement procedure and results of 2 W and 3 W mode entente tenens 51 6 5 2 Measurement procedure and results of p mode
120. sine wave can be represented as a sum of sinusoidal waves having each a frequency that corresponds to an entire multiple of the fundamental according to the relation v t 2 V gt _V sin a t 9 1 k 1 Where Vo Average value of v t V Amplitude of the fundamental of v t Vk Amplitude of the k harmonic of v t Page 121 of 131 VR2250 LEGEND 1 Fundamental 2 Third Harmonic 3 Distorted Waveform Affect of the sum of 2 multiple frequencies In the mains voltage the fundamental has a frequency of 50 Hz the second harmonic has a frequency of 100 Hz and the third harmonic has a frequency of 150 Hz and so on Harmonic distortion is a constant problem and should not be confused with short events such as sags surges or fluctuations It can be noted that in 1 the index of the sigma is from 1 to the infinite What happens in reality is that a signal does not have an unlimited number of harmonics a number always exists after which the harmonics value is negligible The EN 50160 standard recommends stopping the index in the expression 1 in correspondence of the 40 harmonic A fundamental element to detect the presence of harmonics is THD defined as This index takes all the harmonics into account The higher it is the more distorted the waveform gets Page 122 of 131 VR2250 16 11 2 Limit values for harmonics EN 50160 fixes the limits for the harmonic voltages which can be
121. solution MO Accuracy E T as T 2 Reading 2 digit if V R gt 1pA 50 0 99 9 0 1 5 Reading 2 digit if V R lt 1pA 0 01 9 99 0 0 INS 100 10 0 99 9 01 2 Reading 2 digit if V R gt 1pA 100 0 199 9 0 1 5 Reading 2 digit if V R lt 1pA 0 01 9 99 0 0 260 10 0 199 9 0 1 2 Reading 2 digit if V R gt 1pA 200 249 1 250 499 1 5 Reading 2 digit if V R lt 1pA 0 01 9 99 0 0 S00 10 0 199 9 0 1 2 Reading 2 digit if V R gt 1pA 200 499 1 500 999 1 5 Reading 2 digit if V R lt 1pA 0 01 9 99 0 0 i000 10 0 199 9 0 1 2 Reading 2 digit if V R gt 1pA 200 999 1 1000 1999 1 5 Reading 2 digit if V R lt 1pA Open circuit Test Voltage lt 1 3 x Nominal Test Voltage Short Circuit Current lt 6 0mA with 500V Test Voltage Nominal Test Current 500V gt 2 2mA with 230kQ other gt 1mA with 1kQ Vnom RCD TEST ON RCD DEVICES Nominal Test Current IAN 10mA 30mA 100mA 300mA 500mA RCD type AC A General e Selective Phase to Earth Test Voltage 100V 250V 50 Hz Frequency 50Hz 0 5Hz Tripping Time Measurement tan Range ms Resolution ms Accuracy Ve lan lan 1 999 2 lan 1 200 general 1 250 selective 1 2 Reading 2digit 5 lan RCD 1 50 general 1 160 selective Contact Voltage Ut Range V Resolution V Accuracy O 2Uttim 0 1 0 5 Reading 3digit Ut LIM UL 25V o 50V Global Earth Resistance Measurement avoiding
122. st and displays one screen similar to the screen alongside paragraph 9 1 If the Insulation resistance is higher than Rmax see Table2 the instrument emits a double sound signal at the end of the test indicating the positive outcome of the test and displays one screen similar to the screen alongside paragraph 9 1 MM 1 07w pe 514V 158 M eus Insulation Resistance Voltage during the Test Duration of the Test Test mode TMR 500V TIME 60s Setting Time FUNC VNOM 7 Y MO 05 06 01 gt 999mQ The displayed result can be stored pressing the SAVE key twice according to Maximum resistance value which can be measured p 9990 is displayed if a rated voltage of 500V was selected See Table2 The symbol gt means that the resistance value is Page 23 of 131 523V 15s higher than Rmax TMR 500V TIME 60s Test duration FUNC VNOM 7 i The displayed result can be stored pressing the SAVE key twice according to VR2250 6 2 4 MAN and TIMER mode faulty cases ee If the instrument detects the External Power supply adapter connected to the instrument the message along side will be displayed If the instrument detects a Voltage between Input terminals higher than 15V the instrument does not perform the test and displays the screen alongside for 5
123. switch rotation the instrument starts a special procedure to save the batteries ECONOMY MODE the instrument keeps recording but the display is turned off 3 3 CALIBRATION The instrument fulfils the technical specifications listed in this manual The performance of the specifications is guaranteed for one year 3 4 STORAGE In order to grant the accuracy of the measurements after a period of storage in extreme environmental conditions wait for the time necessary so that the apparatus is back to normal measuring conditions see environmental specifications listed in paragraph 14 4 Page 9 of 131 VR2250 4 INSTRUMENT DESCRIPTION LEGEND 1 Display 2 Function Keys 3 Rotary switch GU G8 8 F1 F2 F3 F4 Multifunction Keys ON OFF and backlight key Press it for a few seconds to switch OFF the instrument press it briefly to activate the backlight function START STOP This key is used to start and stop the measurement This key allows you to save the result displayed This key has a double function It is the confirmation key inside the configuration menu and it allows you to freeze the displayed results using the ANALYSER function This key opens the General Configuration Menu This key allows you to quit the modification in the configuration menu or the selected working mode 8 LA E R uj ies Page 10 of 131 VR2250
124. t Hee eer e pec tieni e cte n ln d loeo inated tc iris 104 14 5 ACCESSORIES iiin iini iue ntt iR t RR e e ae dia roe nls miata ane edere init 105 15 SERVICE Aserre 106 15 3 WARRANTY CONDITIONS rotto tnter eerte nee rt einen pi s 106 15 2 SERVICE 4 incierto ette teen eoe gta ep net aad ane eique N 106 16 PRACTICAL REPORTS FOR ELECTRICAL TESTS eese nennen etn nnn tnn tennis 107 16 1 Continuity Test On Protective Conductors sse entente tentent tete tentes ten tren 107 16 2 Insulation Resistance Measurement of the Electrical Installations 250Vdc 500Vdc 1000VdC 108 16 3 Check of the Circuit Separation ssssssesseeeneentetnn treten tentent tette arrene eanna 112 16 4 Earth Resistance Measurement in TT Systems treten tentent 115 16 5 Working Test of RCDs Red Rcd Dc Rcd S Red Dc S nennen 116 16 6 Test of RCD Tripping Time Rcd Red Do ssssssseeseeeentententnntte treten nte ten tenten tentes 117 16 7 Measurement of Short Circuit Fault Impedance Zpn Zpp s ssscssssesseecsssseeeseecssseeessveessssesssssessseesssssessnseessvsessnserssess 118 16 8 Fault Loop Impedance Measurement Phase Earth ssssssssesee entente tentent 118 16 9 Earth Resistivity Measurement sssssseeseeesenenentnntentnne tnn tentent ttn tete ene toten entere tinte niin 119 16 10 Vol
125. t the test leads making sure that the conductive parts of the crocodiles make a good contact to each other Press the START key If the display doesn t show 0 00 repeat the test leads calibration see paragraph 6 1 1 Connect the instrument terminals to the ends of the conductor under test see previous picture If the mode RT or RT was selected use the F3 F4 keys to set the duration of the test 7 Press the START key The instrument will execute the measurement In RT RT Timer mode you can press START key again if you want to stop the test before the duration set is expired CAUTION Never disconnect the test leads when the message MEASURING is displayed 6 1 3 Results of AUTO mode At the end of the test if Average resistance value LOWQ 05 06 01 the average resistance Ravg value Ravg is lower 1 050 than 50 the instrument emits a double sound R R signal indicating the 2 i Resistance values and positive outcome of corresponding test current when the polarities of test the test and l displays lauro 0 110 leads swapped one screen similar to the screen alongside FONG EAT The displayed result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 17 of 131 VR2250 6 1 4 Results of RT and RT modes za if a resistance value Max Resistance value of RT or RT lower than R
126. ta All the previous functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement to record selected parameters according to the instrument s settings see chapter 10 Page 77 of 131 VR2250 8 5 3 HARM mode Selecting the HARM mode the screen below will be displayed according to the settings made as per paragraph 8 1 The screen shows the harmonics see paragraph 16 11 of the current 27 09 00 17 35 12 Example of screen The symbols used are described in Tab 2 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED The displayed histograms represent the harmonic content of the current under test The value of the first harmonic h01 primary at 50Hz is not represented in scale along with the other harmonics in order to maximise the display of the latter In case both voltage and current are connected to the instrument inputs eventual negative values therefore represented under the horizontal axis indicate that such current harmonics are generated by the load Following keys are enabled v F3 F4 to move the cursor of the selec
127. tage Anomalies Voltage S and Surge eterne tentent 121 16 11 Voltage and current Harmonics i022 ccce o ere ec ee PO ee rod i ed A te 121 16 11 1 WOON ias sd noe ER REE ATTE atiende ete ed eti dete ate cep daracu aerials 121 16 11 2 Limit values for harmonl Cs tu cuetiecca cicer cnet ce tete trece teatri a cene cerae 123 16 11 3 Presence Of harmonics Calises e ph pen t Esempi tit A 123 16 11 4 Presence of harmonics consequences ssecseeseesesseesecsneseesecseeseeesesaeenesucsussueeaeeseesesuseuteeteateatenseeeeessnteateateetees 124 16 12 Power and Power Factor definition iniii i 124 16 12 1 Conventions on powers and power factors 126 16 12 2 SHEE ANE EEIE ET E 127 16 13 Measuring Method outlines sssssseeeeeeenenneene tentent tentent tenente tentent tenet tton eniin 128 16 13 1 Integration periods Ea E tete risa ettet en d IM Aout ie testo hd oa arse rrt ino 128 16 13 2 Power factor calculations 3 3 ee e c nda ida dacecebe iita docete ebbe dL each k pedet epe ca Enn 128 17 APPENDIX 1 MESSAGES DISPLAYED scsssssssssssssssssssssssessnsssnsesessnensncesasesessosassesssssssassnsssansnssesosaneass 129 18 APPENDIX 2 RECORDABLE PARAMETERS SYMBOLS eene 130 Page 4 of 131 VR2250 1 SAFETY PRECAUTIONS AND PROCEDURES 1 1 FORWARDS This apparatus conforms with safety standards EN61557 and EN 61010 1 relating to elec
128. te a test with 0 Current waveform or Press the START key once to execute a test with 180 Current waveform CAUTION AN displayed Never disconnect the test leads when the message MEASURING is Ifthe RCD does NOT trip the instrument emits a double sound signal indicating the positive outcome of the test and displays the screen alongside Working mode 05 06 01 The symbol gt means that the RCD did not trip gt 999ms FRO 50 0Hz Ut 1V VP N 231V VP PE 231V Value of contact voltage U detected referred to the rated value of the RCD current set OK RCD passed the test x1 2 30mA 50V FUNC IdN Contact Voltage Limit value RCD nominal current RCD type 6 3 2 2 Results of x1 x2 x5 mode The test can be stored pressing the SAVE key twice according to paragraph 9 1 4 Press the START key once to execute a test with 0 Current waveform Or Press the START key once to execute a test with 180 Current waveform AN displayed CAUTION Never disconnect the test leads when the message MEASURING is If the tripping time is within the limits reported in Table 3 the instrument emits a double sound signal indicating the positive outcome of the test and displays the screen alongside Working mode RCD 05 06 01 Tripping time expressed in TAM 4 9 ms FRO 50 0
129. ted harmonic left and right respectively At the same time the values relevant to the order no of the selected harmonic and to the corresponding absolute and relative values calculated on the basis of the fundamental are updated e F2 to display the page of the harmonics h01 h24 h24 symbol or that of the harmonics h25 h49 h49 symbol ESC to return back to METER mode see paragraph 8 5 2 SAVE to store in the instrument memory a record of Smp type see paragraph 9 2 and the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording ENTER HOLD to enable disable the HOLD function updating interruption of the displayed data All the previous functions remain however available When the HOLD function is enabled the word is displayed When this function is enabled it s not possible to record or take an energy measurement This function is disabled during a recording or an energy measurement MENU to enter in the MENU mode and change the instrument settings see paragraph 8 1 and 8 2 It s not possible to enter the configuration MENU during a recording or an energy measurement START STOP to record selected parameters according to the instrument s settings see chapter 10 Page 78 of 131 VR2250 8 5 4 WAVE mode Selecting the WAVE mode the screen below will be displayed according to the settings made as per paragraph 8 1 Th
130. the instrument ones and so making the test results void Wa lt gt AA Turn the switch to the RCD position The F1 key permits to select one of the following measuring modes which can be shown cyclically when pressing the key Mode AUTO the instrument performs the test automatically with a leakage current equal to half once and five times the value of the rated current set Recommended test Mode x the instrument performs the test with a leakage current equal to half the value of the rated current set Mode x 1 the instrument performs the test with a leakage current equal to once the value of the rated current set Mode x 2 the instrument performs the test with a leakage current equal to twice the value of the rated current set Mode x 5 the instrument performs the test with a leakage current equal to five times the value of the rated current Mode Al the instrument performs the test with a ramp growing leakage current Use this test to measure the tripping current Mode RA the instrument performs the test with a leakage current equal to half the value of the selected rated current and calculates the contact voltage as well as the Ra earth resistance N B The AUTO mode execute automatically test with phase 0 and 180 RCD Type 0 Current Waveform 180 Current Waveform AC type According to standard practice it is recommended to perform the RCD test both with phase 0 and with
131. the values of the selected voltage and current harmonics OFF the instrument will not record any voltage or current harmonic selected ANOM REC V1 ON the Instrument will record Voltage Anomalies voltage Sag and Surge see paragraph 16 10 Voltage RMS value OFF the instrument will not record any voltage Sag and Surge THD DC 01 49 Voltage Total Harmonic Distortion Harmonics respectively DC Component 01 49 THD 01 03 05 07 RMS reference value for Voltage used in Voltage Anomalies Harmonics respectively Vref detection Voltage Sag and Surge The Reference is Only if ANOM REC a Voltage Phase to Neutral for Single Phase and 4 wire three edad sad flag has been set ON phase system 3 wires 400V i b Voltage Phase to Phase for 3 wire three phase system 4 Wiros 230V High and Low Voltage Percent threshold used in Voltage Anomalies detection Voltage Sag and Surge These parameters can be adjusted in range 3 30 step 1 LIM LIM Example Three Phase System 4 wire Only if ANOM REC Vref 230 LIM 6 LIM 10 gt flag has been set ON High Lim 243 8V Low Lim 207 0V 6 10 The Instrument will detect a voltage Anomaly if the RMS Voltage Values calculated every 10ms are beyond the above calculated thresholds see paragraph 16 10 i Current RMS value THD DC 01 49 Current Total Harmonic Distortion DC C
132. tio Password v RECORDER CONFIG SINGLE 50Hz not modified STD not modified not modified Start MANU the recording is started 1 minute after pressing the START STOP key Stop MANU Integration period 15min Recording of harmonics OFF Recording of Voltage anomalies voltage Dips and Surge OFF Selected voltages V1 Selected currents 11 CO GENERATION ON Powers Pf and cosq selected P1 Qti Qic S1 Pf dpf1 Energies Ea1 Eri1 Erc1 By pressing START STOP the recording of the selected parameters is started according to the settings made for each Typical Configuration The rotary switch position does not affect the recording setting Page 93 of 131 VR2250 10 3 DURING A RECORDING If during a recording the external power supply is de energised the instrument will continue the recording using the internal battery power until the batteries are exhausted the data stored up to the point the instrument shuts down won t get lost For this we recommend you ALWAYS insert a new set of batteries before a long recording The instrument uses sophisticated algorithms to prolong the battery life Particularly if the instrument is recording or is measuring energy and the external power supply is not connected after about 5 minutes from the last key pressure or switch rotation the instrument starts a special procedure to save the batteries ECONOMY MODE the instrument keeps recording but the display is tu
133. tion has three working modes v METER v WAVE v HARM These modes will be described in detail in the next paragraphs The symbols used are described below Symbol Description V1 Voltage RMS value Vpk1 Peak value of the voltage h01 h49 Harmonic 01 Harmonic 49 ThdV Factor of total harmonic distortion of the voltage see paragraph 16 11 freq Network frequency Tab 1 Symbols used in the position VOLTAGE Page 72 of 131 VR2250 8 4 2 METER mode In this mode the instrument shows the below screen according to the settings made as per paragraph 8 1 27 09 00 17 35 12 VOLTAGE SINGLE PHASE v1 230 2 V Vpki1 325 5 V ThdV 0 0 Freq 50 0 Hz HARM WAVE PG PG Example of screen The symbols used are described in Tab 1 For eventual messages displayed see Appendix 1 MESSAGES DISPLAYED Following keys are enabled e F1 e F2 F3 F4 amp SAVE ENTER HOLD MENU START STOP to pass to HARMONIC mode see paragraph 8 4 3 to pass to WAVE mode see paragraph 8 4 4 to pass to previous next function respectively to save in the instrument memory a record of Smp type see paragraph 9 2 containing the instantaneous values of voltage and current present on the instrument inputs This function is disabled during a recording to enable disable the HOLD function updating interruption of the displayed data All the prev
134. tive powers apparent powers inductive and capacitive power factors analogical or impulse parameters All these parameters are analysed in a digital way for each phase voltage and current 6 x 128 samples are acquired on a module of 16 x 20ms repeated for the three phases 16 13 1 Integration periods The storage of all the data would require a huge memory capacity Therefore we ve tried to find out a storage method which permits to compress the information to be memorised though providing significant data The chosen method is the integration one after a certain period called integration period which can be set from 5 seconds to 60 minutes 3600sec the instrument extracts from the sampled values the following values e Minimum value of the parameter during the integration period harmonics excluded e Average value of the parameter intended as arithmetic average of all the values registered during the integration period e Maximum value of the parameter during the integration period harmonics excluded Only this information repeated for each parameter to be memorised are saved in the memory along with starting time and date of the integration period Once these data are memorised the instrument restarts to take measurements for a new period 16 13 2 Power factor calculations According to the standards in force the average power factor cannot be calculated as the average of the instantaneous power factors It must be obt
135. tronic measuring instruments CAUTION For your own safety as well as that of the apparatus you are recommended to follow the procedures described in this instruction manual and carefully read all the notes preceded by the symbol Strictly keep to the following instructions before and during measurements q Do not take measurements in wet environments or dusty places Do not take measurements in environments with explosive gas or fuels Keep yourself insulated from the object under test waiting for measuring Avoid any contact with exposed metal parts ends of test leads not in use circuits etc Do not take any measurement in case of unusual conditions of the instrument such as deformation breakage leakage of substances absence of display reading etc Do not use the External power supply adapter optional code MAR if you notice deformation or breakage in the case in the wire or in the plugs Pay careful attention when measuring voltages exceeding 25V in particular places building yards swimming pools etc and 50V in ordinary places because of the risk of electric shock Use only cables and accessories approved by Martindale Electric 4 4 q The following symbols are used in this manual Caution refer to the instructions reported in this manual improper use may damage the apparatus or its components QO AC Voltage or Current Unidirectional pulsating Voltage or Current A Vx
136. ts to select one of the following measuring modes Mode MAN Manual mode Recommended test Mode TMR Timer mode test duration depends on the selected interval from 10 to 999 seconds This test can be performed when the test requires a defined duration 6 2 1 Measurement Procedure 1 Select the desired mode by means of the F1 key 2 Connect the test leads to the instrument input terminals B1 and B4 respectively Example insulation measurement between phase L1 and earth in a 3 PHASE electrical installation using test leads 3 If the cables supplied with the instrument are not long enough for the measurement you can extend the black cable 4 Connect the instrument terminals to the object which is to be submitted to the insulation test after de energizing the circuit under test and all the relative loads see previous picture 5 By means of F2 select the test voltage suitable for the type of test to be carried out see Tablet The values to be selected are 50V test on telecommunication system 100V 250V 500V 1000V Page 20 of 131 VR2250 Systems SELV or PELV 250VDC gt 0 250MQ CEI 64 8 6 Systems up to 500V Civil installations 500VDC gt 0 500MQ Systems over 500V 1000VDC gt 1 0MQ CEI 64 8 4 Floor and wall insulation in civil installations 500VDC gt 50kQ se V lt 500V Floor and wall insulation in systems over 500V 1000VDC gt 100kQ se
137. uctions CAUTION No compliance with the Warnings and or Instructions may damage the apparatus and or its components or injure the operator Before selecting any function disconnect the test leads from the circuit under test When the instrument is connected to the circuit under test do not touch any unused terminals Avoid taking resistance measurements in the presence of external voltages even though the instrument is protected a too high voltage may cause malfunctions When measuring current other currents located near the leads may affect the measuring accuracy When measuring current always position the wire in the very middle of the jaws in order to obtain the highest accuracy A measured value remains constant if the HOLD function is active Should you notice that the measured value remains unchanged disable the HOLD function CAUTION The symbol EI shows the battery status When it is completely black the batteries are fully charged while the I symbol indicates weak batteries When the batteries are too low to execute the test the instrument will show a warning message In this case interrupt testing and replace batteries following the procedure described under paragraph 13 2 The instrument is capable of keeping the data stored even though batteries are not installed The Instrument Date and Time settings aren t lost if you change the batteries within 24hours 1 4 AFTER USE e After
138. ue recording If you insert a wrong password the message Password error will be displayed under PASSWORD After a few seconds the display will return to meter mode and the instrument will continue recording In order to enable disable this option the correct password will have to be entered The display will return to meter mode and START STOP will have to be pressed again to stop the recording You will then need to re enter the ANALYZER CONFIG menu and scroll up or down to the item PASSWORD ON using the multifunction keys F1 and F2 Then turn the password off by pressing the multifunction keys F3 and F4 Page 64 of 131 VR2250 8 2 BASIC SETTING RECORDER CONFIG Place the rotary switch in the ANALYSER position press the MENU key using the F1 F2 keys select the RECORDER CONFIG and press the ENTER Key This option allows you to check and eventually modify the recording parameters and the selected parameters up to a maximum of 62 Frequency If the number of selected values exceeds 63 the message MEWA AEW wil be displayed The RECORDER CONFIG mode is divided into 4 separate sub screens v 1i screen This screen allows you to set the START STOP mode AUTO or MANUAL the START and STOP time if AUTO mode is selected the Integration Period value the Enabling Disabling of Voltage Anomalies detection the Enabling Disabling of Harmonics detection Press ENTER to confirm the settings and pass to the following screen Press ESC
139. ursor on the desired language and press the ENTER key to SAVE the change or press ESC to quit without saving This setting will remain unchanged after turning off the instrument Page 12 of 131 VR2250 5 4 RESET This option re establishes the initial settings of the instrument in ANALYSER function The Current Range parameter it is not modified by the reset command The initial settings of the instrument consist of v ANALYZER CONFIG System SINGLE Frequency 60Hz Current range not modified Clam type STD Transforming ratio of voltmet transformers 1 Password OFF Y RECORDER CONFIG Start MANU the recording is started at 00 sec mark on clock after pressing Stop Integration period Recording of harmonics Recording of Voltage anomalies Sag and Surge Voltage Reference for Sag and Surge detection Upper Limit for Sag and Surge detection Lower Limit for Sag and Surge detection Selected voltages Selected voltage harmonics Selected currents Selected current harmonics CO GENERATION Powers Pf and cos selected Energies the START STOP key MAN 15min ON ON 230V 6 10 V1 THD 01 03 05 07 l1 THD 01 03 05 07 OFF P1 Qi Qic S1 Pf1 DPf1 Ea1 Eri1 Erc1 The RESET command will not erase the instrument s memory Page 13 of 131 VR2250 6 SAFETY TEST FUNCTIONS 6 1 LOWO CONTINUITY TEST WITH 200mA TEST CURRENT The measurement is performed according to EN
140. use turn off the instrument by pressing ON OFF for a few seconds e Remove batteries when the apparatus remains unused for long periods Please follow the storage instructions described at paragraph 14 4 Page 6 of 131 VR2250 2 GENERAL DESCRIPTION 2 1 INTRODUCTION Dear Customer we thank you for your patronage The instrument you have just purchased will grant you accurate and reliable measurements provided that it is used according to the present manual s instructions The instrument was designed to grant the user the utmost safety conditions thanks to a new concept assuring double insulation and over voltage category III 2 2 FUNCTIONS The instrument is able to perform the following tests LOWCO Continuity Test of Protection and Equalising conductors with test current higher than 200mA and open circuit voltage ranging from 4V to 24V c MQ Measurement of insulation resistance with DC test voltage 50V 100V 250V 500V or 1000V RCD Measurement on common and or selective RCDs AC type w and A type of the following parameters v Tripping time v Tripping current v Contact voltage U v Global earth resistance Ra Under this mode the instrument can measure the overall earth resistance without causing RCD tripping LOOP Measurement of line and fault loop impedance with calculation of prospective short circuit current Measurement of fault loop impedance between phase and earth and Global
141. utomatically AUTOPOWER OFF function v lf the instrument is recording or is measuring energy and the external power supply is not connected after about 5 minutes from the last key pressure or switch rotation the instrument starts a special procedure to save the batteries ECONOMY MODE the instrument keeps recording but the display is turned off Before starting a recording the operator should first evaluate the state of the equipment decide what to record and set the instrument accordingly Page 88 of 131 VR2250 10 2 SETTING TYPICAL CONFIGURATIONS In order to facilitate this task the instrument is provided with the following two pre set recording modes 1 Default Configuration this is comprehensive which should fit most cases 2 Typical Configuration it is possible to select recording with pre setting parameters for the following situations Setting parameters for Networks Quality in compliance with EN 50160 standard see paragraph 16 11 2 Setting parameters for Voltage Anomalies detection surges dips break etc See paragraph 16 10 HARMONICS Setting parameters for Harmonics Analysis of Voltage and Current see paragraph 16 11 START UP Setting parameters for Start Up motors and electrical devices POWER amp ENERGY Setting parameters for Power and Energy measures see paragraph 16 12 EN50160 SURGES amp DIPS 10 2 1 Default Configuration The default configuratio
142. with the earth resistance value It is not possible to assume an earth resistance value as reference limit for example 20 according to the art 326 of DPR 547 55 when controlling the test result while it is necessary to check every time that the co ordination complies with the requirements of the standards INSTALLATION PARTS TO BE CHECKED The earth installation under working conditions The check is to be effected without disconnecting the earth plates ALLOWABLE VALUES The earth resistance value measured shall meet the following relation Where Ra lt 50 la Ra Resistance of the earth installation the value can be set with the a 50 following measurements Earth resistance with three wire volt ampere method Fault loop impedance see Two wire earth resistance see Two wire earth resistance in the socket see Earth resistance obtained by the measurement of contact voltage Ui See Earth resistance obtained by the tripping time test of the RCDs A AC RCDs S A AC see Tripping current in 5s of the RCD rated tripping current of the RCD in the case of RCD S 2 lan Safety limit voltage reduced down to 25V in special rooms If the installation is protected by an RCD the measurement shall be performed upstream or downstream the RCD short circuiting it to avoid its tripping These methods even though not provided by the standards CEI 64 8 provide valu
143. x This may cause the tripping of magnetic protection switch with nominal value lower than 10A If necessary perform the test upstream of the switch Never disconnect the test leads when the message MEASURING is displayed Atthe end of the test DUE CSTE Value of phase to phase the instrument emits a impedance expressed in Q double sound signal indicating that the test 0 5 7 Q Value of the phase to phase a is correctly TEUER prospective short circuit terminated and FRQ 50 0HZ current expressed in Amps VP P 402V VP PE 231V calculated according to the displays the values following formula alongside P P Le Working mode FUNC Z2Q Formula for calculation of prospective short circuit current U jio S Z pp Where Un phase to phase voltage 127 if Vmeasx 150 230 if 150V Vmeas lt 260 400 if Vmeas gt 260 e This result can be stored pressing the SAVE key twice according to paragraph 9 1 Page 40 of 131 VR2250 6 4 4 Measurement procedure and results of P PE mode 1 Select P PE mode by means of the F1 key 2 Connect the Red Green and Black connectors of the three terminal mains cable or of the split cables to the corresponding input terminals of the instrument B1 B3 B4 Instrument connection for P PE in a 400V three Instrument connection for P PE test in a 230V phase system single phase System
144. y after a proper setting RMS values of voltage current corresponding harmonics active reactive and apparent powers power factors and cosq active reactive and apparent energies voltage anomalies voltage sag and surge with 10ms resolution It will be possible to analyse the recorded data ONLY by transferring the data to a PC Record simultaneously pressing the START key values of Voltage and Current values coming from test leads and Clamp using Typical Configurations with pre programmed parameters inside the meter see paragraph 10 2 It will be possible to analyse the recorded data ONLY by transferring the data to a PC It s fundamental the Instrument settings correspond to the Installation type under test and accessories in use For this we recommend the user checks the instrument s settings before executing an ANALYSIS measurement Select the ANALYSER position on the rotary switch By pressing the MENU key the following screen will be displayed MENU GENERAL SAFETY TEST MEMORY ANALYZER MEMORY RESET ANALYZER CONFIG RECORDER CONFIG CONTRAST DATE amp TIME LANGUAGE i T It s not possible to enter the MENU during a recording or a Real Time Energy measurement Generally to check instrument s settings you must check ANALYZER CONFIG and RECORDER CONFIG items Page 62 of 131 VR2250 8 1 BASIC SETTING ANALYZER CONFIG Place the rotary switch in the ANALYSER position press the MENU

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