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Manual - National Meter Industries

1. Supply network analyzer CVM 144 User s manual Page No 9 4 3 CVM 144 connection terminal arrangement Expansion card see lable on the rear part 4 3 1 Basic card 770 570 770 573 and 770 576 Description Card connection terminal arrangement Mod CVM 144 C2 las los Code 7 70 570 250 V 18 19 20 21 22 23 24 Mod CVM 144 RS485 C2 GND 9 ka ka Code 7 70 573 AS 485 250 V 3A 18 19 20 21 22 23 24 Mod CVM 144 RS232 C2 GND Px Tx EE E Code 7 70 576 292 250 V Mod CVM 144 C2 Mod CVM 144 RS485 C2 Mod CVM 144 RS232 C2 C digo 770 570 C digo 770 573 C digo 770 576 No Terminal No Terminal description No Terminal description description 13 No used 13 No used 13 No used 14 No used 14 No used 14 No used 15 No used 15 No used 15 No used 16 No used 16 No used 16 No used 17 No used 17 No used 17 No used 18 No used 18 RS 485 GND 18 RS 232 GND 19 No used 19 RS 485 19 RS 232 Rx 20 No used 20 RS 485 20 RS 232 Tx 21 Relay RL2 output 21 Relay RL2 output 21 Relay RL2 output 22 Relay RL2 common 22 Relay RL2 common 22 Relay RL2 common 23 Relay RL1 output 23 Relay RL1 output 23 Relay RL1 output 24 Helay HL1 common 24 Relay HL1 common 24 Relay RL1 common Supply network analyzer CVM 144 User s manual Page No 10 4 3 2 Card for
2. 24 6 6 Setting power demand utility screens 26 6 7 Initial screen setting niounde siirsi aa a a 27 6 8 Setting of the display shutdown time 27 6 9 Clearing energy counters 28 6 10 THD or D setting aee aei iecur dp ok ta editos tide dotes 29 6 11 Additional screens when RELAY OUTPUTS 2 relays are equipped 30 6 12 Additional screens with 4 20 mA outputs y inputs ssseen 37 Ea S SPEGIFIGATIONS 25 catum atu Eu D 42 8 SAFETY CONSIDERATIONS 44 9 217 MANTENAN OE rele a bee oo PIE ea 44 10 TECHNICAL SERVICE enei apaia diou dak ba va kabin e e t len dert 44 11 CVM 144 nennen entente nsns sitne 45 11 1 To take into account DTE TRE 45 11 2 RS 485 type connection to a RS 232 type input of a 46 11 3 RS 232 type connection to a RS 232 type input of a 47 11 4 MODBUS protocol 3 in t tn tienen el tiv asse af 48 12 APPENDIX A Second SET UP of the 144 54 12515 Communication setting oae adiecta ccc n ret pape oka eie ste TaN eta d iex o 54 12 2 SET UP locking or U
3. On the CVM screen following messages appear at this SET UP point provided the right module is connected to the equipment b Election of 0 20 or 4 20mA In 1 INPUT A D Nr 1 Scal Scale 4 20 8 allows choosing a 0 20 mA or 4 20 input max or min key This choice is disable in case of 0 10 V type input card display to validate the selected option and pass to the next setup screen Supply network analyzer CVM 144 User s manual Page No 41 c Scale offset Value of the parameter that we assign as the zero of the scale In 1 INPUT A D Nr 1 Zero zero of the scale X XXX 8 allows choosing the zero of the scale four digits with floating decimal point max key it allows modifying the value of the blinking value Every time it is pressed the number is increased min key it allows validating the blinking value and go to the next digit NOTE When you arrive at the last digit you can move the position of the decimal point with the max key display to validate the selected option and pass to the next setup screen d Full scale Value of the parameter to which we assign the 20 mA In 1 INPUT A D Nr 1 F ESC Full scale X XXX allows choosing the full scale 20 mA four digits with floating decimal point Proceed as in the previous section For passing to the next option press display the setup for the second output will appear only if this
4. eee Supply network analyzer CVM 144 User s manual Page No 57 Insertion of a new module 6 Place the expansion card into the side rail The 2 one from the top checking that the components keep under the card 7 Smoothly insert the card checking that the frontal pins correctly fit into the connector until the card keeps firmly fixed 8 Cut the necessary removable pieces out from the rear cover to permit it to be properly hold 9 Place the CVM 144 rear cover back Detection of a new expansion module 10 For versions 6 xx and later ones the expansion module detection process is automatically performed by the power meter
5. Page No 34 b 2 Programming the minimum value to be controlled OUT 1 RELAY 1 AL LO 0 000 2 Minimum value b 3 Programming the delay OUT 1 RELAY 1 SEC Delay in seconds 2 maximum 9999 s Press to pass to the next option the set up for the second relay is then shown OUT 2 RELAY 2 CODE 00 8 Parameter No 1 Proceed as before Pressing again the set up option exited Supply network analyzer CVM 144 User s manual Page No 35 ALARM ACTIVATION Alarms operation depend on the set values of MAXIMUM and MINIMUM MIN MAX max min MIN MAX max min ON alarm activated relay closed OFF alarm deactivated gt relay open Supply network analyzer CVM 144 User s manual Page No 36 M The DELAY set value is applied either to the connection or the disconnection when the alarm conditions occur M User definable units for the different parameters are Parameter Format Example Voltage V 220 5 220 5 V 0220 220V 0150 150A Powers kW kvarL kvarC 0 540 540 W 250 5 250 5 kW H3 Output relay connection lay out CVM 144 C2 2 relays RELAY 1 RELAY 2 Supply network analyzer CVM 144 User s manual Page No 37 6 12 Additional screens with 4 20 mA outputs y inputs CVM 144 equipped with an Analogue type module provides 4 20 mA d c or 0 20 mA d c inputs an
6. Pd Per xx 3 CLEAR MAXIMUM VALUE IN MEMORY CLr Pd xx no or YES Programming mode max key allows choosing the different available options min key allows the validation of the blinking digit and go forward to the next digit only for the Pd Per xx option To pass to the next option press If you don t want to modify anything just press the key three times without modifying any value 2 o Supply network analyzer CVM 144 User s manual Page No 27 6 7 Initial screen setting This option allows choice among fixed or rotary screen Fixed screen choice is switch just pressing choice the initial screen to be shown when the CVM 144 is powered or when the CVM 144 is reset Rotary screens all screens are successively shown at intervals of 5 s This option is noticed by means of some leds SET dEF PAGE The key max permits to modify the selected page The led of the selected option will be on Whether rotary screens option is selected then all leds will be on Press sp to validate the choice 6 8 Setting of the display shutdown time Setting of the period of time to go by from the moment that the CVM keyboard is not touched anymore before the CVM display is automatically shut down low consumption mode dISP OFF 05 Time to shutdown Minutes When the display is shut down a point at the bottom left corner of the CVM will keep blinking The
7. O 7 5 2 1 on 000 nnn m 8 L2 N CVM 144 20 19 asanD CVM 144 If the RS485 232 converter with RTS control ability code 770208 is used then the pin 7 connection in the 232 side is not necessary to be done Supply network analyzer CVM 144 User s manual Page No 47 11 3 RS 232 type connection to a RS 232 type input of a PC DB 9 RS 232 CVM 144 20 Tx 19 Rx 18 GND O O CVM 144 Supply network analyzer CVM 144 User s manual Page No 48 11 4 MODBUS protocol The CVM 144 analyzer can communicate by means of the MODBUS protocol as it is following described When the CVM 144 communicates with MODBUS protocol it uses the RTU mode Remote Terminal Unit Each 8 bits byte in a message contains two 4 bits hexadecimal characters The format for each byte in RTU mode is Code Bits per Byte Error Check Field MODBUS FUNCTIONS FUNCTION 01 FUNCTION 3 or 4 FUNCTION 05 8 bits binary hexadecimal 0 9 A F Two hexadecimal characters contained in each 8 bits field of the message 8 data bits Cyclical Redundancy Check CRC Reading of relay state Reading of n Words 16 bits 2 bytes T
8. side and rear covers IP 31 Dimensions 144 x 144 mm depth 84 mm Weight 0 400 kg Supply network analyzer CVM 144 User s manual Page No 43 Relays characteristics according to model Maximum switching load 750 VA Maximum switching voltage 250 Vac Maximum switching current Resistive Mechanical endurance 3x10 operations Energy alarms pulses max 1 pulse s At full load 250 V a c 3 A Electrical endurance 1x10 operations Maximum operation cadence 450 operations hour Analog output features according to the model Output type 0 4 20 mA Resolution 4096 points 12 bits Maximum impedance 500 Analog input features according to the model 0 20 mA inputs Resolution 4000 points 12 bits Input impedance 200 Characteristics of residual currents measuring input acc to the model Transformer type WG Series Current measuring range Depending on used input Input gt 30mA 3A 30A gt 300 mA 30 A Resolution 4000 points 12 bits Safety Category III 300 V a c 520 a c as per EN 61010 n Protection against electric shock by class 1 double isolatit Standards IEC 664 VDE 0110 UL 94 IEC 801 IEC 348 IEC 571 1 EN 50081 1 EN 50082 1 EN 61010 1 Dimensions 144 144 Supply network analyzer CVM 144 User s manual Page No 44 8 SAFETY CONSIDERATIONS All installati
9. 20 mA A D3 input 16 4 20 mA A D2 input 17 4 20 mA ADI input 18 RS 232 GND 19 HS 282 Rx 20 RS 232 Tx 21 Relay RL2 output 22 Relay RL2 common 23 Relay RL1 output 24 Relay RL1 common Supply network analyzer CVM 144 User s manual 4 3 3 Module for residual and neutral currents 770 572 770 575 and 770578 Lable in the expansion module connection terminal 22 2 24 1 Page No 11 Description 13 14 15 16 17 18 Mod CVM 144 C2 Currents Si J E AI nc P Pe Code 7 70 572 IN 5A 20V 13 14 15 20 21 22 23 21 Mod CVM 144 RS485 C2 Currents 5 524 5 S S2 a5 p e TENA Code 7 70 575 Ns SOV 13 15 22 23 24 Mod CVM 144 RS232 C2 Currents of 821 3 S22 x nb gt R diz Code 7 70 578 WS RS 232 20v Mod CVM 144 C2 Currents RS485 C2 Currents RS232 C2 Currents Code 7 70 572 Code 7 70 575 Code 7 70 578 N Terminal description Terminal description Terminal description Mod CVM 144 Mod CVM 144 13 Measur residual current S1 14 Measur residual current S2 Measur residual current S1 Measur residual current S2 Measur residual current S1 Measur residual current S2 30 A 30 A 30 A 15 Measur residual current S2 15 Measur residual current S2 15 Measur residual current S2 3 A 3 A 3 A 16 Measur neutral current S1 16 Mea
10. display will be automatically turned on when any CVM key is pressed max key to modify the value of the blinking value min key to validate the blinking value and go to the next digit Supply network analyzer CVM 144 User s manual Page No 28 6 9 Clearing energy counters On display we see CLR ENER no Clear energy counters max To select YES or no 4 To validate the choice and pass to the following set up option Display If any of the energies is programmed kWh kvarhL or kvarhC it is displayed as follows Example If the accumulated energy is 32 534 810 kWh it will be displayed as follows MWh e 259 Wh max mn 810 Wh Note the energy counter range is limited at 999 999 999 Wh that is when the value of 1 GWh is reached the counter is reset to zero Supply network analyzer CVM 144 User s manual Page No 29 6 10 THD or D setting SET SET dHAR or dHAR d Thd Two modes for the harmonic distortion calculation can be selected a d total value of the harmonic distortion referred to the fundamental value b Thd total value of the harmonic distortion referred to the R M S value The selected option will be the one shown on screen To select any option just press max to switch between the two available options Press lt to validate the choice Since all set up options have been completed the se
11. execute the measurement of the residual current with the CVM 144 is shown in the below tables Measurement of residual current with a maximum value of 3 A 30 mA 3 A WG Transformer Mod CVM 144 Currents Terminal No Description Terminal No Description 151 Measuring winding S1 13 Residual current measur S1 192 Measuring winding S2 15 Residual current measur S2 251 Not used 3 A 252 Not used Measurement of residual current with a maximum value of 30 A 300 mA 30 A WG Transformer Mod CVM 144 Currents Terminal No Description Terminal No Description 151 Measuring winding 51 13 Residual current measur S1 152 Measuring winding S2 14 Residual current measur S2 251 30 252 Not used 4 3 4 Card for digital Inputs 7 70 579 and 7 70580 User s manual Page No 13 Description Card connection terminal arrangement Mod CVM 144 C2 Digital Code 770 569 Code 7 70 579 Mod CVM 144 RS485 C2 Digital 13 14 15 16 COM IN4 IN3 IN2 O0 99 9 n DIGITAL INPUT 24 V 6 mA 13 14 15 COM IN4 IN3 N2 9 09 9 16 17 INT GND DIGITAL INPUT 24 V 6 mA 18 19 20 RS 485 21 22 23 24 250 V 21 22 23 24 EE 250 V Mod CVM 144 RS232 C2 Digital 14 15 13 16 17 COM IN4 IN3 IN2 GND I 19 20 21 22 23 24 Hx TX Ha 55 O0 H Q
12. m CIRCUTOR SUPPLY NETWORK ANALYZER CVM 144 SERIES Ver 6 11 and higher INSTRUCTION MANUAL M98170101 03 03C CIRCUTOR S A CONTENTS page ie DELIVERY SPOT GEEGK ied hie ad eon nh ta a e pa ky ra t o edd e 2 22 MAINIEEATUBES21 ted eite t one tdt HEU ee oe M tus cde tah alt a 3 MEM azur M 5 4 INSTALLA TION AND STAR FUP dere e dye band kk 6 4 1 InstallatlQni s sortent eite ien det ecce e ree AE Mie ea 6 4 2 CVM 144 connection terminal arrangement power supply connection terminal 8 4 3 CVM 144 connection terminal arrangement Expansion card 9 4 4 Connection drawing for the CVM 144 14 bi OPERATION MODE prd dece etae e ee de dudas eu ae yep ev dac an ka da da dau ee Se auge 18 SETUP PROGEDURBRE ete tee dete edt ect Hae ee re dca dL dap wan 20 6 1 Phase to Phase or Phase to Neutral voltages ssssseeee 21 6 2 Voltage display mode ssssssssssssessseeeee nennen nennen snnt enne 21 6 3 Voltage transformation ratio ssssssessssssseee eene nnne 22 6 4 Current Transformer eene nennen nnne enne 23 6 5 Transformation ratio for the measurement of neutral and residual CUrrent
13. option press gt ee Supply network analyzer CVM 144 User s manual Page No 24 The secondary of the current transformers is not programmable It is automatically set at 5 A 5 A ac The primary current value to be set is also limited by the following condition The maximum allowable primary current value which can be set is defined by the fact that the multiplication of the primary voltage value by this primary current value cannot exceed 20 000 000 6 5 Transformation ratio for the measurement of neutral and residual current This section is only applicable for the CVM 144 units equipped with the module for residual and neutral current measurement 7 70 572 7 70 575 amp 7 70578 6 5 1 Primary of the current transformer for neutral current measur In The screen shows the message A n P and fixe numeric digits that permit the user to set the value of the current transformer for the neutral current measurement An P S41 A 10 000 A a To enter or modify the value of the C T s primary just repeatedly press max to increase the value of the blinking digit When the value in screen is the required pass to the next digit by pressing min so that the whole value can be set c When the last digit blinks pressing then min the first digit is again accessed so that set value can be modified if required o d To access next set up option press 3 y NOTES The secondary of th
14. output is available Proceed similarly for all analog inputs Supply network analyzer CVM 144 User s manual Page No 42 7 SPECIFICATIONS Power supply see specifications on the rear part of the CVM 144 CVM 144 Single phase 230 V a c Voltage tolerance 10 Yo 15 Yo Frequency 50 60 Hz BURG IN siia coii ap comico a 5 VA CVM 144 SDC Direct current 24 V 120 V d c Voltage tolerence 20 Yo 15 Yo Burden 2 2 W Operation temperature 10 to 50 C Humidity 5 to 95 Yo R H non condensing Measuring Circuits Rated voltage 300 V a c Phase to Neutral 520 V a c Phase to Phase Frequency 45 to 65 Hz Rated current In 5 A isolated inputs in the CVM 144 ITF model Permanent overload 1 2 In Current input burden 0 75 VA Accuracy Voltage 0 5 offull scale 1 digits KOUN ON aso ki k kk n avek ena iya ka m 0 5 Yo of full scale 1 digits 1 of full scale 1 digits Test conditions Errors due to C T are not included and direct voltage measurement Temperature between 5 and 45 Power factor between 0 5 and 1 Full scale measure range 5 Yo 100 Yo Mechanical Characteristics Connection pluggable connection terminal Case material Self extinguishable VO plastic Protection Assembled unit frontal IP 55 Un assembled unit
15. transformer of In 5 A a c Supply network analyzer CVM 144 User s manual Page No 3 2 MAIN FEATURES The CVM 144 power meter is a programmable measuring instrument offering several operation possibilities selectable in its SET UP option Before power supplying the instrument read the CONNECTIONS and SET UP sections and choose the most suitable operation mode for getting your desired data mg CIRCUTOR energy The CVM 144 is an instrument which measures calculates and displays all the main electrical parameters at any electrical network balanced or not The measuring is true RMS value through three a c voltage inputs and three a c current inputs from Current Transformers 5A Supply network analyzer CVM 144 User s manual Page No 4 By means of an internal microprocessor it simultaneously measures Parameter Symbol 11 12113 Average Voltage phase neutral Voltage phase phase Curent Jj xJ x x Frequenay a x4 Active power Reactive power war x x x ReactivepowerC kato x x x Apparentpower kwa Cos x Wh S i kvar 1 1 enegy kvarhC energy X Neutral current X Voltage THD X xX X Current THD x x x Individual harmonic current content Up to the 15 Analog
16. 300 V 70 000 500 V 40 000 In case that a value higher than the maximum allowable value is validated the screen will blink and the previous set value will be kept in memory Supply network analyzer CVM 144 User s manual Page No 23 6 3 2 Voltage Transformer Secondary We can now set the value of the secondary of the voltage transformer Only three digits are available SET U S Same process than in point 6 2 max key Allows us modifying the value of the blinking digit Each time it is pressed the value is increased min key Allows us the validation of the blinking digit and going to the next one Press Pi to pass to the next setup option If the CVM144 is directly connected to the mains without voltage transformer the values of primary and secondary must be the same for instance 00001 001 6 4 Current Transformer Primary SET A P and five digits appear on screen allowing us to set the primary of the current transformer SETA 214A 10 000 A a To enter or modify the value of the C T s primary just repeatedly press max to increase the value of the blinking digit b When the value in screen is the required pass to the next digit by pressing min so that the whole value can be set c When the last digit blinks pressing then min the first digit is again accessed so that set value can be modified if required d To access next set up
17. 50 MODBUS REGISTERS HEXA DECIMAL longs PARAMETER Units PRESENT MAXIMUM MINIMUM Value Value Value Frequency L1 Hz Hz x 10 28 29 88 89 E8 E9 Line voltage L1 L2 V12 Vx 10 2A 2B 8A 8B EA EB Line voltage L2 L3 V23 V x 10 2C 2D 8C 8D EC ED Line voltage L3 L1 V31 Vx10 2E 2F 8E 8F EE EF Yo THD V 1 96 x 10 30 31 90 91 FO F1 THD V2 96 x 10 32 33 92 93 F2 F3 THD V 3 96 x 10 34 35 94 95 F4 F5 Yo THD 11 96 x 10 36 37 96 97 F6 F7 THD 12 Yo X 10 38 39 98 99 F8 F9 THD 13 Yo X 10 3A 3B 9A 9B FA FB Active energy kWh Wh 3C 3D Inductive reactive energy kvarh L varLh 3E 3F Capacitive reactive energy kvarh varCh 40 41 Three phase apparent power kVA III 42 43 A2 A3 102 103 Power demand L1 Pd 44 45 A4 A5 Three phase current 46 47 A6 A7 106 107 Neutral current mA 48 49 A8 A9 108 109 Analog input 1 Real value 4A 4B AA AB 10A 10B Analog input 2 Real value 4C 4D AC AD 10C 10D Analog input 3 Real value 4E 4F AE AF 10E 10F Residual earth leakage current mA 50 51 BO B1 110 111 Power demand L2 Pd 52 53 B2 B3 Power demand L3 Pd 54 55 B4 B5 Modbus addresses valid only for the analogue input modules 770574 amp 770577 Modbus addresses valid only for the currents module 770575 and 770578 This parameters are only enabled if the maximum demand by line current has been programmed Supply network anal
18. 9 Code 7 70 580 DIGITAL INPUT 24 V 6 mA RS 232 250 V 3A Mod CVM 144 Mod CVM 144 Mod CVM 144 C2 Digital RS485 C2 Digital RS232 C2 Digital Code 7 70 569 Code 7 70 579 Code 7 70 580 No Terminal description No Terminal description No Terminal description 13 digital inputs common 13 digital inputs common 13 digital inputs common 14 digital input IN4 14 digital input IN4 14 digital input IN4 15 digital input INS 15 digital input IN3 15 digital input INS 16 digital input IN2 16 digital input IN2 16 digital input IN2 17 digital input IN1 17 digital input IN1 17 digital input IN1 18 no used 18 RS 485 GND 18 RS 232 GND 19 no used 19 RS 485 19 RS 232 Rx 20 no used 20 RS 485 20 RS 232 Tx 21 Relay RL2 output 21 Relay RL2 output 21 Relay RL2 output 22 Relay RL2 common 22 Relay RL2 common 22 Relay RL2 common 23 Relay RL1 output 24 Relay RL1 common Relay RL1 output Relay RL1 common Relay RL1 output Relay RL1 common User s manual Page No 14 Supply network analyzer CVM 144 4 4 Connection drawing for the CVM 144 a Three phase network 4 wires low voltage P2 1 r 123 4 5 6 7 8 9 10 11 12 VL3 A C POWER SUPPLY VL2 VL1 PowerSupply SDC Model N 1 Vd c 2 Vd c Supply network analyzer
19. CVM 144 User s manual Page No 15 b Three phase network 3 wires low voltage P2 P1 O O L1 Egg 520 581 pa P1 O O L2 Pit men 13 ES 52 51 123 45 6 7 8 9 10 11 12 e e VL3 A C POWER SUPPLY VL2 VL1 PowerSupply SDC Model 2 Vd c Supply network analyzer CVM 144 User s manual Page No 16 c Three phase network wires 2 P T C T 123 45 6 7 8 9 10 11 12 A C POWER SUPPLY PowerSupply SDC Model 2 V d c Supply network analyzer CVM 144 User s manual Page No 17 d Three phase network 3 wires 2 and 2 C T i 12345 6 7 8 9 10 11 12 VL2 A C POWER SUPPLY PowerSupply SDC Model 1 Vd c 2 V d c IMPORTANT REMARK If power 0 01 is shown for any of the phases codes 03 09 and 15 and voltage and current are not zero for this phase check out following points Assure that L1 L2 and L3 phases coincide in voltage and current Correct polarity Reverse the current transformer placed at this phase Supply network analyzer CVM 144 User s manual Page No 18 5 OPERATION MODE The instrument has three displays Each one has also a LED type indicators red colour Ever
20. NIOCKING iccirco ek tcr teen ss e pen D agde 55 13 APPENDIX B Insertion of an expansion module into a CVM 144 56 Supply network analyzer CVM 144 User s manual Page No 2 1 DELIVERY SPOT CHECK This manual is issued to help all the CVM 144 Version 6 11 and higher users to install and use it in order get the best from it After receiving the unit please check the following points a Does this device correspond to your order specifications b Check if any damage was done during the shipment process c Verify that it includes the correct instruction manual The manual you hold in your hands contains information and warnings about the CVM 144 that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions AN Before powering the instrument for the first time verify following points a Power supply see rear part of your CVM 144 Standard 230 V a c Single phase Frequency 50 60 Hz SDC Model 24 120 V c c Other supply voltages on request b Maximum measuring voltage Standard 300 V a c phase neutral 520 V a c between phases Other models on request CVM144 measuring 110V 110 V a c phase to neutral 190 V a c phase to phase CVM 144 measuring 500V 500 V a c phase to neutral 866 V a c phase to phase c Maximum measurable current Current
21. When this option of the 2 Setup menu is accessed the following message will be shown in screen during some seconds Set UP Inic 12 1 Communication setting a Communication protocol MODBUS SET PROT Protocol di MODBUS BUS protocol e key to validate the choice and pass to the next set up screen Supply network analyzer CVM 144 User s manual Page No 55 b SETTING COMMUNICATION PARAMETERS SET Cdef Default configuration NO max key to switch from NO YES If YES is chosen the configuration is 001 9600 8 bits N 1 bit If NO is chosen pressing following options successively appear n PER Peripheral No 001 to 255 Baud 1 baud rate 1 200 2 400 4 800 9 600 19 200 Parity No even odd LEN length 8 bits Stop bits 10r2 12 2 SET UP locking or unlocking SET Up SH Loc locked SET UP or Unloc unlocked SET UP Use the key max to modify the choice Whether LOC is set when the SET UP is accessed configuration parameters can be visualized but cannot be modified To modify the previously set option a 4 figure password is required to be entered in case that this password is not correct this blinks and the previous menu is again accessed PASSWORD 1234 To exit this set up mode the key RESET can be pressed at any moment WARNING if the set up is exited by pressing the key RESET some last modifi
22. analog Inputs Outputs 7 70 571 7 70574 and 7 70577 Description Card connection terminal arrangement E 3 13 14 15 16 17 18 19 20 21 22 23 24 Mod CVM 144 C2 Analogue GOU AY ope ane pe kal Code 7 70 571 pM ANALOG IN OUT 0 20mA 250V 3A No 13 14 15 16 17 19 20 21 2 23 24 Mod CVM 144 RS485 C2 Analogue CAN ran ve MA es l 2 La a Code 7 70 574 ANALOG IN OUT 0 20mA S485 250 V ES 13 14 15 16 17 18 19 20 21 22 23 24 Mod CVM 144 RS232 C2 Analogue Ger GUL ine ake INTE LSU RES ze kal Code 7 70 577 ANALOG IN OUT 0 20mA 250 V Mod CVM 144 Mod CVM 144 Mod CVM 144 C2 Analogue RS485 C2 Analogue RS232 C2 Analogue Code 7 70 571 Code 7 70 574 Code 7 70 577 Terminal description Terminal description Terminal description 13 4 20 mA I O common 14 4 20 mA D A1 output 15 4 20 mA A D3 input 16 4 20 mA A D2 input 17 4 20 mA 01 input 18 No used 19 No used 20 No used 21 Relay RL2 output 22 Relay HL2 common 23 Relay RL1 output 24 Relay RL1 common 13 4 20 mA common 14 4 20 mA D A1 output 15 4 20 mA A D3 input 16 4 20 mA A D2 input 17 4 20 mA ADI input 18 RS 485 GND 19 RS 485 20 RS 485 21 Relay RL2 output 22 Relay RL2 common 23 Relay RL1 output 24 Relay RL1 common 13 4 20 mA I O common 14 4 20 mA D A1 output 15 4
23. cations might not be saved in memory or reach the end of this set up mode Supply network analyzer CVM 144 User s manual 13 APPENDIX B Insertion of an expansion module into a CVM 144 unit The installation of an extension card into a CVM 144 unit must be accomplished just following below enumerated steps Checking the card acknowledgement 1 Check that the expansion card to be inserted into the CVM 144 will be acknowledged by the power meter Page No 56 Code Expansion module Board 5 xx 6 xx 7 70 570 Mod CVM 144 C2 X 7 70 571 Mod CVM 144 C2 Analogue 0571 X X 7 70 572 Mod CVM 144 C2 Currents 0572 X 7 70 569 Mod CVM 144 C2 Digital X 7 70 573 Mod CVM 144 RS485 C2 0573 X X 7 70 574 Mod CVM 144 RS485 C2 Analogue 0574 X X 7 70 575 Mod CVM 144 RS485 C2 Currents 0575 X 7 70 579 Mod CVM 144 RS485 C2 Digital 0579 X X 7 70 576 Mod CVM 144 RS232 C2 0576 X X 7 70 577 Mod CVM 144 RS232 C2 Analogue 0577 X X 7 70 578 Mod CVM 144 RS232 C2 Currents 0578 X 7 70 580 Mod CVM 144 RS232 C2 Digital 0580 X X Removing the rear cover 2 Disconnect the meter out from the electric network 3 Pull the connection terminals out 4 Insert a plain edge screwdriver into the bottom gaps see right picture and pull up the holding pieces until these are released 5 Now the cover removable with the hand should be easily os
24. circuit protected with gl type IEC 269 or M type fuses rated between 0 5 and 2 A This circuit should be provided with a circuit breaker or any equivalent element to connect ON or disconnect OFF the instrument from the power supply network The supply and measuring voltage circuits will be both connected through a wire with a minimum cross section of 1 mm The line of the current transformer secondary will have a minimum cross section of 2 5 mm Supply network analyzer CVM 144 User s manual Page No 8 4 2 CVM 144 connection terminal arrangement power supply connection terminal see lable on the rear part In 5A 300 V L P2 P1 P2 P1 P2 Pi BN RP 230 V 1912 13 300V 520V St 1 2 5 6 Li i ower Supply 8 5 SS St N Vi 2 Vi 3 4 CAT III 7 8 9 10 11 12 Terminal description No Terminal description Power supply AL1 7 IL3 S2 Current measurement Power supply AL2 8 IL3 S1 Current measurement IL1 S2 Current measurement 9 Neutral IL1 S1 Current measurement 10 VL1 Measurement IL2 S2 Current measurement 11 VL2 Measurement IL2 S1 Current measurement 12 VL3 Measurement Ooc0A amp ONAZ E NOTE Terminals 3 5 7 are internally connected to the 9 terminal Neutral 5 A current inputs are isolated for the ITF model Lower connection terminal SDC Model Descripci n Borne 1 Supply voltage d c 2 Supply voltage d c
25. d outputs inputs can also optionally be 0 10 V type 6 12 1 Additional screen with the 4 20 mA output These can be programmed to obtain an output signal proportional to any of the parameters measured by the CVM 144 including the ability of setting the scale offset and full scale values On the CVM screen following messages appear at this SET UP point provided the right module is connected to the equipment a Parameter choosing dA 1 OUTPUT D A Nr 1 Code A e Parameter No max min keys permits the user to choose any parameter measured by the CVM 144 but the parameters referred to energies display key validates the selected option and passes to the next setup screen b Election of 0 20mA or 4 20mA dA 1 OUTPUT D A Nr 1 Scal Scale 4 20 8 allows choosing a 0 20 mA or 4 20 output max or min key display to validate the selected option and pass to the next setup screen Supply network analyzer CVM 144 User s manual Page No 38 c Scale offset Value of the parameter that we assign as the zero of the scale dA 1 OUTPUT D A Nr 1 Zero zero of the scale X XXX 8 allows choosing the zero of the scale four digits with floating decimal point max key it allows modifying the value of the blinking value Every time it is pressed the number is increased min key it allows validating the blinking value and go to the next digit NOTE When yo
26. e Every time it is pressed the value is increased min key to validate the blinking value and go to the next digit NOTE When the last digit is reached the position of the decimal can be move point with the max key Example for setting a 500 W 1 pulse Firstly we enter the value 0500 and following we place the decimal point at the right position with the max key 0 500 kW Supply network analyzer CVM 144 User s manual Page No 33 For accessing to the next option press gt set up options for the second relay will appear OUT 2 RELAY 2 CODE 00 Parameter value 2 Act as before Pressing again the set up mode is exited b ALARM conditions 1 condition for each relay If any other parameter excepts for energies is selected at 1 two outputs can be configured as alarms For each output it is possible to set Any of the parameters measured by the CVM 144 MAXIMUM value G MINIMUM value amp Delay for the conditions These screens are successively displayed by the CVM 144 once the parameter has been selected for the set up of each option proceed as in the Section a b 1 Programming the maximum value to be controlled OUT 1 RELAY 1 AL hl 0 000 2 Maximum value The key max will increase the value of the blinking digit 0 1 9 sign Use the key min to pass to the following digit Supply network analyzer CVM 144 User s manual
27. e current transformers is not programmable It is automatically set at 5 A 5 A a c sate Supply network analyzer CVM 144 User s manual Page No 25 6 5 2 Residual current measuring range 3 A or 30 A You will view in screen the message SET A_L Set then the right measuring range of the residual current input to which the WG transformer has been connected Two possible values are available the choice must coincide with the measuring transformer wiring 3 A or 30 A a To select the appropriate input range just press the key max the value will switch from one option to the other one b To pass to the next option press NOTE For the measurement of the residual current earth leakage current the use of transformers of the WG xx series is required These transformers can be connected to the 3 A or 30 A rated input depending on the needed measuring range For the measurement of the neutral current the use of 5A current transformers is required Tue Supply network analyzer CVM 144 User s manual Page No 26 6 6 Setting power demand utility screens Push the key and the following screens will appear by display 1 PARAMETER TO CONTROL Pd Code xx Three phase active power Three phase apparent power Average three phase current Single line current A1 A2 Value of power integrated during the programmed demand period 2 DEMAND PERIOD 1to 60 min
28. er 00 Hex in decimal 212 5 V mA 1 in decimal 9000 mA W 1 in decimal 4000 W varL 1 in decimal 144 varL PF 1 x 100 in decimal 96 PF CRC character Supply network analyzer CVM 144 User s manual Page No 53 b Reading of digital inputs and outputs Inquiry Answer Relay outputs Digital inputs PP0100000008 CRC PP0100100004 CRC PP0101XXCRC Where PP gt peripheral No XX hexadecimal byte gt translated to binary b7 b6 b5 b4 b3 b2 b1 bO bit Relay outputs Digital inputs 770 579 y 770 580 bo relay 1 Digital input 1 bi relay 2 Digital input 2 b2 No used Digital input 3 b3 No used Digital input 4 c Write of digital outputs This function is used to force the status of the CVM 144 digital outputs Output No Message Answer Relay 1 PP050000xx00 CRC PP050000xx00 CRC Relay 2 PP050001xx00 CRC PP050001xx00 CRC Where gt peripheral No xx gt 00 Deactivate FF Activate Tee Supply network analyzer CVM 144 User s manual Page No 54 12 APPENDIX A Second SET UP of the CVM 144 A second SET UP menu is accessible in order to perform the configuration of the CVM 144 with other features different from factory supplied ones To access this menu proceed as follows Being the CVM 144 powered off simultaneously press min keys Holding these keys pressed powered the CVM 144 on
29. his function permits to read all the electrical parameters of the CVM 144 Each parameters is a 32 bits long hence two words are required to inquiry for a parameter Writing one relay Supply network analyzer CVM 144 a Registers assigned to different parameters measured by the CVM 144 User s manual Page No 49 MODBUS REGISTERS HEXA DECIMAL longs PARAMETER Units PRESENT MAXIMUM MINIMUM Value Value Value Phase voltage V 1 Vx 10 00 01 60 61 1 Current A 1 mA 02 03 62 63 C2 C3 Active power kW1 W 04 05 64 65 C4 C5 Reactive power kvar 1 var 06 07 66 67 C6 C7 Power factor 1 PF x 100 08 09 68 69 C8 C9 Phase voltage V 2 Vx10 0A OB 6A 6B CA CB Current A2 mA OC 0D 6C 6D CC CD Active power kW2 W OE OF 6E 6F CE CF Reactive power kvar 2 var 10 11 70 71 DO D1 Power factor PF2 PF x 100 12 13 72 73 D2 D3 Phase voltage V 3 10 14 15 74 75 D4 D5 Current A3 mA 16 17 76 77 D6 D7 Active power kW3 W 18 19 78 79 D8 D9 Reactive power kvar 3 var 1A 1B 7A 7B DA DB Power factor PF3 PF x 100 1C 1D 7C 7D DC DD Three phase active power kWIll W 1E 1F 7E 7F DE DF Three phase inductive power kvarL III var 20 21 80 81 EO E1 Three phase capacitive power kvarC III var 22 23 82 83 E2 E3 Cos Ill Cos x100 24 25 84 85 E4 E5 Three phase power factor PF Ill P F x100 26 27 86 87 E6 E7 User s manual Page No
30. inputs Earth leakage residual current Available Display and communications xx Communications The CVM 144 delivers the visualization of above listed parameters by means of three 4 digit led type displays Up to 3 parameters can be simultaneously read in the screen OTHER FEATURES Low size 144 x 144 mm panel mounting analyzer True R M S measuring system Collection in memory of maximum and minimum values Energy measurement indication through a lighting led RS 485 or RS 232 type communication to a PC optional Maximum demand determination kW kVA or line current Supply network analyzer CVM 144 User s manual Page No 5 3 MODELS Code Model measurement 770551 CVM 144 Shunts 770552 CVM 144 ITF Isolated ITF a S s 2 3 57 o 5 cr 3 Se e S 8523235952 E 15199 285 E 5516 o o 2 cc oos Code Expansion modules Card O EE JA lt lt 7 70 570 Mod CVM 144 C2 2 7 70 571 Mod CVM 144 C2 Analogue 0571 2 3 1 7 70 572 Mod CVM 144 C2 Currents 0572 2 X 7 70 569 Mod CVM 144 C2 Digital 2 4 7 70573 Mod CVM 144 RS485 C2 0573 RS485 2 7 70 574 Mod CVM 144 RS485 C2 Analogue 0574 RS485 2 3 1 7 70575 Mod CVM 144 RS485 C2 Currents 0575 RS485 2 X 7 70 579 Mod CVM 144 RS485 C2 Digital 0579 5485 2 4 7 70 576 M
31. ion permits the user to select the voltage display mode That way the choice between viewing the voltage with one decimal digit or without decimals is user programmable SEt SEt Udec 6 Udec no YES No decimals 1 decimal digit c To select one of the voltage options just press the green key max and both options will appear alternately d When you get in the display the desired option just press the key to validate it and access to the next set up option Tee Supply network analyzer CVM 144 User s manual Page No 22 6 3 Voltage transformation ratio 6 3 1 Voltage Transformer Primary On the screen we read the word SET U P followed by 5 digits They allow us setting the primary of the voltage transformer SET 0 write or modify the value just repeatedly press the max key and the blinking digit value will be increased b When the value on screen is the proper one we can pass to the next digit by pressing the min key in order to modify the other values c When the blinking digit is the last one pressing the min key we go back to the initial value set values can be again modified d Press to pass to the next setup option Note Maximum values of transformation ratios which are allowable to be set depend on the full scale value of the measuring instrument see indications on the rear side lable FULL SCALE MAXIMUM ALLOWABLE VALUE VALUE 110 V 99 999
32. ive power kvarC III Frequenc Frequency Active energy Ph Ph voltage L1 L2 Reactive energy inductive Ph Ph voltage L2 L3 Reactive energy capacitive Ph Ph voltage L3 L1 m Three phase apparent power kVA III Power demand 35 ret Analog input 3 3 Residual earth leakage current There are besides some parameters that refer to 3 phases at once In case that any of these parameter is selected then the alarm will be activated always one phase complies with alarm settings Power demand L1 Power demand L2 This parameters are only enabled if the maximum demand by line current has been programmed Parameter Symbol Code Line to neutral voltages V1 or V2 or V3 90 Currents I1 or I2 or I3 91 Active powers kW1 or kW2 or kW3 92 Reactive powers kvarl or kvar2 or kvar3 93 Power factors PF1 or PF2 or PF3 94 Line to line voltages V12 or V23 or V31 95 Yo THD V THDV1 or THDV2 or THDV3 96 Yo THD I THDI1 or THDI2 or THDI3 97 Cos PF Ill Hz V 12 V 23 V 31 Pd Pd Pd 19 20 21 22 23 24 35 42 43 Supply network analyzer CVM 144 User s manual Page No 32 a If an ENERGY parameter is chosen kWh 31 kvarhL 32 or kvarhC 33 OUT 1 RELAY 1 PULS TS 9 kW pulse 1 1 Value of energy in kW four digits with floating decimal point Set up procedure max key to modify the value of the blinking valu
33. nstantaneous values will appear again after 5 seconds While showing maximum or minimum values the LED indicators will keep blinking Pressing the reset key the system is reset This is equivalent to switch off the power supply of the instrument The maximum and minimum values recorded will be automatically deleted from the internal memory If you are in the set up process and press the reset key you exit it without saving any modification that you might have done this event will depend on the set up section that is accessed when the reset action is carried out and reset of the system occurs tee Supply network analyzer CVM 144 User s manual Page No 20 6 SET UP PROCEDURE The set up procedure of the CVM 144 is performed by means of several SET UP options 87 For accessing the set up menu the keys max 8 min must be simultaneously pressed once the instrument is at the main screen When accessing the SET UP the message SET UP unlo 1 is shown for some seconds on screen or otherwise the message SET UP loc 2 1 Set up UNLO SET UP unlocked when the SET UP is accessed configuration parameters can be either visualized and modified 2 Set up LOC SET UP locked when the SET UP is accessed configuration parameters can be visualized but cannot be modified Once into the SET UP use the keyboard to select different options and enter required variables The key L validates de
34. od CVM 144 RS232 C2 0576 RS232 2 7 70 577 Mod CVM 144 RS232 C2 Analogue 0577 RS232 2 3 1 7 70 578 Mod CVM 144 RS232 C2 Currents 0578 RS232 2 X 7 70 580 Mod CVM 144 RS232 C2 Digital 0580 5232 2 4 Optionally 2 analog inputs and 2 analog outputs ME Relay Current Code Complete Kit Communications Outputs inputs 7 70 591 CVM 144 ITF RS485 C2 RS 485 2 Isolated 1 Each CVM 144 supports as a maximum 1 expansion module Supply network analyzer CVM 144 User s manual Page No 6 4 INSTALLATION AND START UP The manual you hold in your hands contains information and warnings that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions The instrument must not be powered and used until its definitive assembly on the cabinet s door If the instrument is not used as manufacturer s specifications the protection of the instrument can be damaged When any protection failure is suspected to exist for example it presents external visible damages the instrument must be immediately powered off In this case contact a qualified service representative 4 1 Installation Before powering the instrument for the first time verify following points a Power supply see rear part of your CVM 144 Q Standard supply Single phase 230 V a c Frequency 50 60 Hz Supply voltage tolerance 10 15 C
35. on specification described at the previous chapters named INSTALLATION AND STARTUP INSTALLATION MODES and SPECIFICATIONS Note that with the instrument powered on the terminals could be dangerous to touching and cover opening actions or elements removal may allow accessing dangerous parts This instrument is factory shipped at proper operation condition 9 MAINTENANCE The CVM 144 does not require any special maintenance No adjustment maintenance or repairing action should be done over the instrument open and powered and should those actions are essential high qualified operators must perform them Before any adjustment replacement maintenance or repairing operation is carried out the instrument must be disconnected from any power supply source When any protection failure is suspected to exist the instrument must be immediately put our of service The instrument s design allow a quick replacement in case of any failure 10 TECHNICAL SERVICE For any inquiry about the instrument performance or whether any failure happens contact to National Meter s technical service National Meter Industries Inc Bedford NH 03110 P 800 325 6674 D 603 669 5790 email tech national meter com www national meter com Supply network analyzer CVM 144 User s manual Page No 45 11 CVM 144 COMMUNICATIONS E o LI yo or some CVM 144 can be connected to a P C With this s
36. onnection terminal Terminals 1 2 Power supply Burden 5 VA SDC Model 0 24 120 V c c continua Supply voltage tolerance 20 15 Connection terminal Terminals 1 2 Power supply Burden 2 2W LJ On request other voltages Supply network analyzer CVM 144 User s manual Page No 7 b Maximum voltage at the voltage measuring circuit Standard 300 V a c phase to neutral 520 V a c phase to phase 45 to 65 Hz LJ Other models on request CVM 144 measuring 500 V 500 Va c phase to neutral 866 Va c phase to phase CVM 144 measuring 110 V 110 Va c phase to neutral 190 Va c phase to phase c Maximum allowable current Current Transformer of In 5 A a c d Operation conditions Operation temperature range 10 to 50 C Humidity 5 to 95 96 R H non condensing Altitude below 2000 m e Safety Designed to meet protection class IIl 300 V a c as EN 61010 Protection against electric shock by class II double isolation Mounting A Instrument is to be mounted on panel cut out 138 x 138 mm as DIN 43 700 All connections keep inside the cabinet Note that with the instrument powered on the terminals could be dangerous to touching and cover opening actions or elements removal may allow accessing dangerous parts Therefore the instrument must not be used until this is completely installed The instrument must be connected to a power supply
37. sur neutral current S1 16 Measur neutral current S1 17 Measur neutral current S2 Measur neutral current S2 Measur neutral current S2 18 Not used 18 RS 485 GND 18 RS 232 GND 19 Not used 19 RS 485 19 RS 232 Rx 20 Not used 20 RS 485 20 RS 232 Tx 21 Relay RL2 output 21 Relay RL2 output 21 Relay RL2 output 22 Relay RL2 common 22 Relay RL2 common 22 Relay RL2 common 23 Relay RL1 output 23 Relay RL1 output 23 Relay RL1 output 24 Relay RL1 common 24 Relay RL1 common 24 Relay RL1 common Notes For the measurement of the residual current earth leakage current the use of transformers of the WG xx series is required These transformers can be connected to the 3 A or 30 A rated input depending on the needed measuring range For the measurement of the neutral current the use of required 5A current transformers is Supply network analyzer CVM 144 User s manual Page No 12 Connection diagram of the WG transformer for residual current purposes One single WG series transformer can be use for the measurement of residual currents within the range to 3 A or to 30 A jut depending on the arranged connection diagram The current input used for the residual current measurement must agree with the input selected in the pertinent a Setup section 6 5 The appropriate connection mode to
38. t up is exited all modifications are saved in memory and the running mode automatically starts up Supply network analyzer CVM 144 User s manual Page No 30 6 11 Additional screens when RELAY OUTPUTS 2 relays are equipped With these outputs the CVM 144 C2 can be set to deliver A Pulse every certain kWh or kvarh ENERGY You can define the value corresponding to the energy consumed for generating a pulse 0 5 s long kWh 1 pulse or kvarh 1 pulse B ALARM conditions the parameter to be controlled the maximum value the minimum value and the delay are user definable for each relay output On the CVM 144 screen following messages appear at this SET UP option OUT 1 RELAY 1 CODE 00 2 Parameter No 1 Depending on the selected variable we will pass to a or b sections M In case that no parameter is wanted to be programmed set par No 00 Parameter Symbol Code Symbol Code Symbol Code phase L1 phase L2 phase L3 Single voltage e PEE kW2 Reactive power kvarL 1 04 El 2 kvarL 3 14 Inductive Capacitive kvarC 1 kvarC 2 kvarC 3 Power factor Yo THD V Yo THD A CVM 144 User s manual Page No 31 Parameter Symbol Code Parameter Symbol Code Three phase active power kW III 16 cos Three phase inductive power Ill 17 Three phase power factor Three phase capacit
39. u arrive at the last digit you can move the position of the decimal point with the max key display to validate the selected option and pass to the next setup screen d Full scale Value of the parameter to which we assign the 20 mA dA 1 OUTPUT D A Nr 1 F ESC Full scale X XXX allows choosing the full scale 20 mA four digits with floating decimal point Proceed as in the previous section Supply network analyzer CVM 144 User s manual Page No 39 For passing to the next option press display the setup for the second output will appear only if this output is available dA 2 OUTPUT D A Nr 2 code XXXX Proceed as in the previous sections 1 Output calculation 20 Zero Offset amp f scale defined by the user F scale Offset Zero 0 mA or 4 mA mA Re solution Mesure Offset Zero mV 100 ohms mA x 100 Re solution Maximum load is of 500 10 V 20 mA e Output of the power factor parameter PF Ind 1 00 Cap 0 00 6 Cap 1 00 Ind 0 00 Supply network analyzer CVM 144 User s manual Page No 40 6 12 2 Additional screens with 4 20 mA inputs The 4 20 mA analog inputs which can also be optionally 0 10 V type can be set to obtain the processed signal either by display or through communications To complete the analog inputs management the user must program the scale values offset and full scale value
40. value and pass to the next menu The key MAX permits to select among different options in a menu or to increase a digit when a variable is being entered The key MIN permits to move the cursor along the digits Different options are following shown in a sequential mode Choice of visualization of phase to neutral or phase to phase voltages Voltage displaying format Voltage transformation ratio Value of the current transformer primary 1 a 10000 A Value of the current primary value for the measurement of neutral and residual currents Power demand meter setting Choice of default initial screen Time for display shutdown Deleting energy counters 10 Choice of harmonic distortion determination mode 4 or THD 11 Alarms setting RELAY 1 OUT 1 amp RELAY 2 OUT 2 12 Analog outputs and inputs setting eee Supply network analyzer CVM 144 User s manual Page No 21 6 1 Phase to Phase or Phase to Neutral voltages After the word set you will see on the three displays the voltages of the phases L1 L2 L3 U1 U12 U2 Or U23 U3 U31 Phase to Neutral Voltages U1 U2 U3 Phase to Phase Voltages U12 U23 U31 a To select one of the voltage options just press the green key max and both options will appear alternately b When you get in the display the desired option just press the key to validate it and access to the next set up option 6 2 Voltage display mode This opt
41. y led will be on according to the parameter presently shown in screen When the CVM 144 is powered on 2 screens with the indication of the program version and the hardware configuration If the message EEPr Err is shown by display it means that any problem on the hardware configuration has been detected If this happens please contact to the technical service After some seconds the analyzer is ready for operation and shows one of the available screens A led next to the shown parameter is on Parameters on display can be switch by pressing the key Leds on the right or left indicate the parameters shown on screen at any moment When the first led red is on it means that VOLTAGE values are shown on screen that is the user can read the voltage of the phase L1 V1 voltage of the phase L2 V2 and voltage of the phase L3 V3 Whether the key elis press the next led will be on so indicating that for this screen CURRENT values of each phase are now shown Pressing again the key the next led will be on and the screen will shown following three parameters and so successively Supply network analyzer CVM 144 User s manual Page No 19 Max min Pressing the max or min key maximum or minimum values for the parameters being shown by display respectively appear in screen This function is only valid while you keep pressing the max or min key If you stop pressing the key the i
42. ystem we get all the parameters in one central point of reading The CVM 144 has a serial RS 485 or RS 232 type output according to the model If we connect more than one device to the same communication line RS 485 we have to assign to each of them a different code or direction from 01 to 255 since the P C needs the identification of every measuring point 11 1 To take into account l PROTOCOL MODBUSO Question Answer CVM 144 DEFAULT CONFIGURATION 001 9 600 8 bits N 1 bit Available baud rates 1 200 2 400 4 800 9 600 19 200 bauds RS 485 type output RS 485 connection will be carried out by means of a twisted and screened cable with a minimum of 3 wires with a maximum distance between the CVM 144 and the last peripheral of 1 200 m The CVM 144 uses a RS 485 communication bus allowing up to a maximum of 32 devices in parallel Multi point bus per port used in the PC RS 232 type output RS 232 connection will be carried out by means of a twisted and screened cable with a minimum of 3 wires with a maximum distance between the CVM 144 and the P C of 15 m eee Supply network analyzer CVM 144 User s manual Page No 46 11 2 RS 485 type connection to a RS 232 type input of a PC RS 232 ooeo O a le 7 5 O le S65 9 2113 an CONVERTER RS 232 RS 485
43. yzer CVM 144 User s manual Page No 51 MODBUS REGISTERS PARAMETER Units HEXA DECIMAL longs L1 L2 L3 Fundamental mA 1F4 1F5 212 213 230 231 Harmonic 2 96 1F6 1F7 214 215 232 233 Harmonic 3 Yo 1F8 1F9 216 217 234 235 Harmonic 4 Yo 1FA 1FB 218 219 236 237 Harmonic 5 Yo 1FC 1FD 21 21 238 239 Harmonic 6 Yo 1FE 1FF 21C 21D 23A 23B Harmonic 7 Yo 200 201 24E 24F 23C 23D Harmonic 8 96 202 203 220 221 23E 23F Harmonic 9 96 204 205 222 223 240 241 Harmonic 10 96 206 207 224 225 242 243 Harmonic 1 1 96 208 209 226 227 244 245 Harmonic 12 96 20A 20B 228 229 246 247 Harmonic 13 96 20C 20D 22A 22B 248 249 Harmonic 14 96 20E 20F 22C 22D 24A 24B Harmonic 15 Yo 210 211 22E 22F 24C 24D NOTE The maximum number of parameters 1 parameter 1 word of 32 bits that can be read in one transmission is 20 Supply network analyzer CVM 144 User s manual Page No 52 EXAMPLE INQUIRY 00 00 08 4D 00 00 23 28 00 00 OF A0 00 00 00 90 00 00 00 60 CB 2E OA 04 00 00 00 0A 71 76 CVM 144 peripheral number 10 in decimal Reading function Initial address first register Number of registers to be read CRC character OA 04 14 00 00 08 4D 00 00 23 28 00 00 OF AO 00 00 00 90 00 00 00 60 CB 2E CVM 144 number 10 in decimal Reading function the one use for the inquiry Bytes received 20 V 1x10 regist

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