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CENTRON® Meter Technical Reference Guide

1. CENTRONO Meter Technical Reference Guide 65 Operation C12 19 C1SD C1ST and C1SL Versions Using The PC PRO Advanced programming software a user can Configure the quantity s to be transmitted Select the type of registers to be transmitted Select the number of digits for the data to be transmitted as well as the number of decimal place digits for the data Select the one of three date formats to be transmitted as ERT information Enable TOU and select the TOU rate to be transmitted When using Type 8 ERTS the format for the KWh value should be 7 2 XXXXX XX and the format for the demand value should be 7 4 XXX XXXX 66 CENTRONO Meter Technical Reference Guide CHAPTER 8 Testing Troubleshooting and Maintenance In This Chapter Testing Support Features i eR ec Oe ei phe ea 68 Recommended Energy Testing Procedures sse 71 Field Testing contando bush dt Or besu RAT EOS idee 71 TroubleshooOtiig 4 aun aere et marc ne hr RE AED IRE bene 72 Inspecting and Troubleshooti n g General eee 76 Inspecting and Troubleshooting C1S LCD and CISR 78 This section provides information and instructions to help you test and maintain the CENTRON meter Topics covered include Testing support features Energy testing Recommended testing procedures TOU schedule testing Fjeld testing Troubleshooti
2. Option Description 1 7 second billing register display 1 second blank 7 second segment check display 7 7 2 7 second billing register display 1 second blank 1 second segment check display 7 1 3 Only the billing register is displayed 7 0 Digits and Multipliers The following digit and multiplier settings are available for factory programming digits x 1 kWh digits x 10 kWh 5 digits x 1 kWh Factory programmable multipliers are available for CL20 x20 x40 and x80 applications This allows the meter to display and transmit via RF primary readings Meters are labeled accordingly when factory programmed 26 CENTRONO Meter Technical Reference Guide CHAPTER 5 Operation C1SR Version In This Chapter Standard Consumption Message SCM Interval Data Message IDM Physical Description CISR CISR Display teet nets CISR Electronic Detent essse Net MELETIN OC certos menit erasa atn Resetting Values CISR Trans nia Testing the RF Message Tamper Det c tiO Naun ana an aa an aa on ao once vec e conin Retrofitting the CISR Personality Module The Itron CENTRON CISR is a one way unlicensed radio frequency RF personality module that attaches to the CENTRON meter base See the figure below It offers a cost effective solution for the endpoints in automatic and off site meter reading a
3. 74 CENTRONO Meter Technical Reference Guide Error Code Err 4 Err 5 Err 6 Error Reverse Power Flow Error Clock Load Profile Error Full Scale Overflow Error Testing Troubleshooting and Maintenance Non Fatal Errors Possible Cause s The configured reverse power threshold has been reached Load Profile halted due to power down with dead or missing battery The calculated W delivered demand at an EOI exceeded the configured full scale value Error Description Reverse power is tested every second and an accumulator for it is maintained If power is delivered during the second then the accumulator is cleared If power is received during the second then the accumulator is incremented If the accumulator reaches the configured reverse power threshold then the error is triggered A Demand Reset will clear this error This is tested upon power up A set clock with a good battery present will clear this error Be sure to read the Load Profile data prior to setting the clock to clear the error The dead battery will cause some invalid intervals at the end of the data When the error is cleared Load Profile will be restarted from the beginning to purge the bad data This is tested at a demand EOI The maximum demand register continues to accumulate and W delivered is still correctly displayed When a demand reset is performed the correct maximum W delivered
4. CHAPTER 9 Specifications and Drawings In This Chapter Pedi Ir ide 79 DTA WIAD P das 79 Specifications For a complete list of the latest CENTRON meter specification numbers refer to the CENTRON Meter Specification Numbers Bulletin Part Number 428601 220 Drawings 1 0 LOAD Figure 37 Form 1S Wiring Diagram CENTRONO Meter Technical Reference Guide 79 Specifications and Drawings LOAD Figure 38 Form 28 Wiring Diagram Alternate Positions of Potential Terminal Jaws Figure 39 Form 3S 120V Wiring Diagram 80 CENTRONO Meter Technical Reference Guide Specifications and Drawings LINE 0 2 1 0 2 1 LOAD Figure 40 Form 38 240V Wiring Diagram t D 2 z LOAD Figure 41 Form 4S Wiring Diagram CENTRONO Meter Technical Reference Guide 81 Specifications and Drawings Atanat paritiors of movab b patont ial nml Altornato ir al fifth tormiral jan LOAD Figure 42 Form 128 Wiring Diagram LINE LOAD Figure 43 Form 258 Wiring Diagram 82 CENTRONO Meter Technical Reference Guide Glossary of Terms Alternate Mode One of the four modes of register operation used to display quantities that are not needed on a regular basis for example Kh Annunciator A Liquid Crystal Display LCD label that is displayed to identify a particular quantity being displayed EEPROM Electrically Erasable Programmable Read Only Memory EEPROM is a memory chi
5. FCC Part 15 Subpart C When equipped with a radio transmitter option this equipment has been tested and found to comply with the limits for an intentional radiator pursuant to Part 15 Subpart C of the FCC Rules This equipment generates uses and can radiate radio frequency energy If not installed and used in accordance with the instructions it may cause interference to radio communications The limits are designed to provide reasonable protection against such interference in a residential situation However there is no guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television reception which can be determined by turning the equipment on and off the user is encouraged to try to correct the interference by one of more of the following measures Reorient or relocate the receiving antenna of the affected radio or television Increase the separation between the equipment and the affected receiver Connect the equipment and the affected receiver to power outlets on separate circuits Consult the dealer or an experienced radio TV technician for help Changes or modifications not expressly approved by Itron Inc could void the user s authority to operate the equipment RF Exposure Information This equipment complies with the FCC RF radiation requirements for uncontrolled environments To maintain compliance with these requirements the antenna and any
6. Meter Versions Covenoptions Polycarbonate CIS CISR CISC C12 19 CISD CIST CISL Display Functions Standard Not Available Glass Including Demand Reset Optical Tower The C1S and CISR modules can display kWh readings in either a 4x1 4x10 or 5x1 configuration The C12 19 CISD CIST and CISL modules can display a maximum of 80 display items for the Normal Alternate and Test modes Specifications The following sections describe the CENTRON meter specifications Electrical Voltage Rating Operating Voltage Frequency Operating Range Battery Voltage Operating Range Carryover Operating Environment Temperature Humidity Accuracy Transient Surge Suppression 120V 240V 2096 60 Hz 10 50 Hz 60 Hz 50 Hz 3 Hz 3 6 V nominal C1SD Clock C1ST C1SL only 3 4 3 8 V 10 12 year cumulative and 15 year shelf life 40 C to 185 C 0926 to 9596 non condensing 0 596 O unity power factor 0 596 O 50 power factor ANSI C62 45 1992 IEC 61000 4 4 CENTRONO Meter Technical Reference Guide General Information Characteristic Data Starting Watts 2S CL200 5W 1S 28 CL320 128 25S 10W 3S CL20 1 2W 4S CL20 2 4W Temperature Rise Meets ANSI C12 1 Section 4 7 2 9 Burden Data Metrology Voltage Watt Loss VA 1S 3 7 2S Class 200 7 2 2S Class 320 10 2 3S 10 2 4S 10 2 128 258 5 4 240V Register R300 R300HP Cellnet wee R300CD CD3 Watt Loss 0 45 135
7. 4S The self contained meters can be programmed to display normal kWh consumption 5X1 register configuration or tens of kWh consumption 4X10 register configuration If the CISR is programmed for a 4x10 display a Mult by 10 label is placed on the module to the left of the LCD display Thus the actual energy consumption is obtained by multiplying the value on LCD display by 10 The transformer rated meters can be programmed to display either a 5x TR or 4xTR In order to determine the actual energy consumption the display reading needs to be multiplied by the transformer ratio TR If the transformer ratio is 1 then the reading on the display is the actual energy consumption The LCD display contains an electronic load indicator or watt disk emulator The disk emulator is three square segments in the lower right hand corner of the display which scroll in the direction of energy flow CENTRONO Meter Technical Reference Guide 29 Operation C1SR Version e Icons are illuminated on the display when the meter is programmed with a non standard algorithm The LCD will display DET for detented energy Icons for delivered DEL and received REC are not used There is no additional indicator for the standard undetented configuration i e where reverse energy is accumulated in the forward register Factory programmable multipliers are available for CL20 x20 x40 and x80 applications This allows the meter to display and transmi
8. All Indicators are Non Latching meaning the R300CD CD3 board continues to increment for each and every alarm event or tamper occurrence each time they happen 64 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions Event Alarm and Tamper Assignments for the CENTRON R300CD CD3 For all Fatal Errors the R300CD CD3 module stops transmitting For Non Fatal Errors transmission can be controlled via PC PRO Advanced software Tamper Event Alarm 1SCM 2SCMs 3SCMs Meter Inversion SCM 1 SOM 1 SCM 1 Tamper Circuitry Indicator 1 Indicator 1 Indicator 1 Meter Removal SCM 1 SCM 1 SCM 1 Tamper Circuitry Indicator 2 Indicator 2 Indicator 2 Demand Reset N A SOM 2 M Push Button Indicator 1 Indicator 1 SCM 2 SCM 2 Low Battery NA Indicator 2 Indicator 2 End of Billing Schedule N A SCM 2 SEN ZE 1 year from end Indicator 2 Indicator 2 o SCM 3 Clear Billing Data N A N A Indicator 1 SCM 3 Energy Register Edit N A N A Indicator 1 SCM 3 Test Mode Entered N A N A Indicator 1 SCM 3 TOU Schedule NJA NJA Indicator 1 SCM 3 Mass Memory Error N A N A Indicator 1 SCM 3 Self Read Cleared NJA NJA Indicator 1 SCM 3 Meter Reconfigured N A N A Indicator 1 SCM 3 Energy Reconfigured NJA NJA Indicator 1 SCM 3 ANSI Security Fail N A N A Indicator 2 SCM 3 Reverse Power Flow N A N A Indicator 2 SCM 3 Loss of Phase N A N A Indicator 2
9. Number of Pulses per sec Wapp x Testing Using the Disk Emulation Annunciator The CENTRON meter is capable of visually being tested by using the Watt Disk Emulation Annunciator Recommended Energy Testing Procedures Testing solid state meters on test boards that were designed primarily for electromechanical meters may give unexpected results Erroneous readings have been known to occur on light load tests when the test sequence calls for said light load test to follow immediately after the full load test The problem is caused by improper jogging and can be avoided by sequencing the test in order of applied power such that the lowest power is tested first This problem does not exist on modern test boards with the latest test software AEP Test Codes The table below shows the AEP Test Codes Meter Specification CL100 120V 2W 1 Phase Type CIS 15TA 1 0Kh FM1S 60Hz CL200 240V 3W 1 Phase Type C1S 30TA 1 0Kh FM2S 60Hz CL320 240V 3W 1 Phase Type C1S 50TA 1 0Kh FM2S 60Hz CL20 240V 2W 1 Phase Type C1S 2 5TA 1 0Kh FM3S 60Hz CL20 120V 2W 1 Phase Type C1S 2 5TA 1 0Kh FM3S 60Hz CL20 240V 3W 1 Phase Type C1S 2 5TA 1 0Kh FM4S 60Hz CL200 120V 3W 2 Phase Type CN1S 30TA 1 0Kh FM12S 60Hz CL200 120V 3W 2 Phase Type CN1S 30TA 1 0Kh FM25S 60Hz Field Testing Field testing of the CENTRON meter may be accomplished with conventional methods using either the infrared test pulses or the load emulation annunciator CENTRONO Meter Technical R
10. Take appropriate grounding measures Do not power ON the meter without the inner cover in place Power before retrofitting CENTRONO Meter Technical Reference Guide 13 Installation To change or add a Personality Module 1 e Remove power from the meter Remove the outer polycarbonate or glass cover Remove plastic inner cover by holding the meter with both hands and applying equal pressure on either side of the three and nine o clock positions The inner cover is held in place by four plastic tabs on the meter base Remove the black board to board connector in the figure below between the circuit board and the metrology board by pulling it by its middle while moving it side to side To maintain the integrity of the connector only remove it when you are upgrading the meter Figure 8 Removing the Board to Board Connector Remove the register module one side at a time by pulling gently outward on the meter frame snaps O in the figure above while lifting the module up Snap the new module into the meter frame by aligning the notches at bottom of the circuit board with the lower two snaps The module must be aligned properly in the snaps to avoid damaging the connector or circuit board 14 CENTRONO Meter Technical Reference Guide Installation Figure 9 New Module Snap in 7 Replace the board to board connector by aligning the top of the connector with the notches in the circuit board and pre
11. The figure below shows how messages are typically transmitted In the example an interval packet made up of 18 intervals is transmitted every five minutes Each interval contains a pulse count equivalent to the energy consumption for a 2 5 minute interval The interval packet transmission represents a sliding 45 minute window of data Also shown in figure below Interval packet 0 shows that the 2 5 minute interval is transmitted in one of the 18 packets of 2 5 minute information Interval packet 1 is transmitted 5 minutes later and the selected 2 5 minute interval of data is now transmitted as the 16th packet numbered 15 The following packet slides the information by two 2 5 minute intervals and continues for a total of nine transmissions The information is then no longer in the sliding 45 minute window 36 CENTRONO Meter Technical Reference Guide Operation C1SC Version kWh Pulses Interval 0 Interval 1 Interval 2 Interval 6 Interval 7 Figure 29 Cellnet Telemetry FCC Regulations The CISC communicates in the unlicensed 902 928 MHz band governed by the US Code of Federal Regulations CFR Title 47 Part 15 Subpart C Paragraph 247 This device complies with Title 47 Part 15 Subpart C Paragraph 247 of the FCC rules Display Functions The LCD is configured for five digits of energy consumption and will rollover at 100 000 kWh The LCD is automatically adjusted for contrast over the operating temperature
12. Transmission SCheIfe cd reet ist eot eire tero dsd aid 36 FCC R sulatlon EE 37 Displ y Eutnctions iei ede sett n se ada dd rae beh t tr 37 R s ttin 2 Valles EE 38 Programming the CISC ONISC ou aacn na va none one vo nen ee vezore vezeve ores ee neo sezone veren e ese zor ene 38 The Itron CISC is a one way transmitter used for the Cellnet fixed network technology The personality module transmits a formatted data packet consisting of the preamble the utility billing ID kWh information and Cyclic Redundancy Checks CRC to ensure message integrity The module also features built in power outage notification reverse power flow detection power restoration notification and redundant transmissions The C1SC uses spread spectrum to broadcast its message in the 902 to 928 MHz frequency range once every five minutes 45 Kan 02 wo WV SC 48 0002 Figure 26 CENTRON CISC The CISC is factory programmed to include the utility billing ID LAN Address ID and Register configuration The utility billing ID is a value decided upon by the utility and Cellnet The LAN address is a value that is assigned by Itron and programmed into every meter within the network LAN addresses and utility billing IDs are unique to each meter Itron activates the LAN ID upon receipt of the meter association file CENTRONO Meter Technical Reference Guide 35 Operation C1SC Version After programming the module is tested to verify the operating
13. an external magnetic field Maximum Demand The largest demand calculated during any interval over a billing period The Maximum Demand quantity displayed in Test Mode is that value calculated over the test interval only this can differ from the Normal Mode demand interval Mode Timeout The amount of time the meter will remain in Scroll Lock Alternate Mode Test Mode Test Alternate Mode or Toolbox Mode before automatically returning to Normal Mode This time is programmable Non volatile Memory See Flash Memory 84 CENTRONO Meter Technical Reference Guide Normal Mode One of the four operating modes of the meter It includes all routine meter operations Optical port Optical interface located on the face of the meter The meter can be programmed and communicated with through the optical port Register Multiplier A programmable value which is used in calculations of displayed energy and demand readings This can be used by setting the register multiplier equal to the CT ratio times the PT ratio of the installation Rolling Interval Demand A calculation of maximum demand derived from the moving average of the smaller consecutive subintervals RS 232 RS 485 Accepted industry standards for serial communications connections This Recommended Standard RS defines the specific lines and signal characteristics used by serial communications controllers to standardize the transmission of serial data bet
14. 0 90 1 67 1 67 VA 716 729 1476 21 76 21 57 120V Register R300 R300HP Cellnet 21 R300CD CD3 Watt Loss 0 28 0 65 0 90 1 76 1 80 VA 2 40 5 50 11 10 11 87 11 98 To get the watt loss or VA of the overall product add the metrology watt loss to the register watt loss and option board watt loss VA Meter VA Metrology VA Register Watt Loss Meter Watt Loss Metrology Watt Loss Register CENTRONO Meter Technical Reference Guide 7 General Information Technical Data Meets applicable standards ANSICI2 I 2001 American National Standard for Electric Meters Code for Electricity Metering ANSI C12 18 1996 American National Standard Protocol Specification for ANSI Type 2 Optical Port ANSI C12 19 1997 American National Standard Utility Industry End Device Data Tables ANSI C12 20 2002 American National Standard for Electricity Meters 0 2 and 0 5 Accuracy Classes ANSI IEEE C62 45 1992 Guide to Surge Testing in Low Voltage AC Power Circuits TEC 61000 4 2 EC 61000 4 4 Dimensions The following dimensional measurements are shown in inches and centimeters Figure 6 Dimensions Polycarbonate Ej 6 29 6 95 2 70 3 16 4 53 16 00 17 70 6 90 8 00 11 50 A PA E 6 42 6 95 347 3 64 5 01 16 30 17 70 8 10 9 20 12 70 CENTRONO Meter Technical Reference Guide General Information C1SD C1ST C1SL Dimensions o MM a 5 E
15. 56 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions The following events take place when an automatic demand reset occurs at a season change 1 Thecurrent season energy registers are copied directly to the last season energy registers 2 Thecurrent season maximum demand registers are copied directly to the last season maximum demand registers and t rate is added to the cumulative demand register 3 After the demand reset the maximum demand registers are reset to zero and the t rate cumulative demand register is copied to the last season cumulative demand register If there is no demand reset at season change all current season registers are directly copied to last season registers at season change but no current season registers are zeroed Load Profile Specifications Capacity The C1SL module provides 144 Kbytes of EEPROM for up to eight channels of interval load profile data The amount of installed EEPROM actually used for load profile recording is programmable from 1 to 144 Kbytes in one Kbyte increments Bit Resolution The mass memory is configured for 16 bit data resolution Equivalent pulse count resolution per interval is as follows Bis Pulse Counts When a Net quantity i e Net Wh is chosen as a load profile channel all load profile channels have 15 bit resolution There is a difference between MV 90 and the D T L Register concerning load profile data The D
16. CXI CX t L Where C is a constant that is dependent upon the geometric and magnetic properties of the coil CENTRONO Meter Technical Reference Guide 17 Operation Base Metrology This field is focused to flow through the Magnetic Core s air gap where the Hall sensor is precisely positioned The voltage Vout which is formed on the Hall Effect device is proportional to the input watts see the Power Measurement Principle figure below The output voltage of the Hall Effect device is then Via Vout GIV GPower G is the combined gain factor of the entire system Voltage to biasing current line Current to flux density Hall sensor Va SKU 1 XV Figure 13 Power Measurement Principle in 2S Meter From the power information available at the output voltage of the sensor the meter architecture is simplified over previous designs as the multiplication has already taken place see the Simplified CENTRON Architecture figure below The Hall sensor output voltage is amplified by a differential amplifier in order to bring the signal within the nominal level of the analog to digital converter ADC The output of the ADC is integrated over time to get the energy information and generates a pulse stream that is accumulated into a counter When the accumulated pulses reach a threshold set by meter calibration a Wh pulse is emitted and the meter LED is flashed The counter threshold is programmed at the f
17. Operation C12 19 C1SD C1ST and C1SL Versions 41 FOIS tc rita ei ro lo Mr Air o ei D MI ed 42 Type Ode iii IE 42 Controls arid IndiGators ains 43 Modes of OPeratiONS tt iia lies iaa iD exes AERE XXE n 44 Normal Mode a EE 44 AlternateiMode inde DE ee TR SS 44 Tes MOde ii A A AE A AA 45 Testi Mode TIMO A ie ear ieee 45 Test Mod Lockout x ne eee lees Ger lin eee 45 DISPIAVS CU 45 vi CENTRONO Meter Technical Reference Guide Table of Contents Optical Port x6 etes tees terme tea ura xa cs Akan edes 47 Programmable Functions sessssssssssseseeeese seen entren either ns eee ee tere eee eee eee 47 Energy Data Display ltems SN 47 Demand Data Display Items ssssssssssssseseseeee eee enne 47 Informational Data S TEVE 47 Buka SS Se a enses tnnt rennen een sinn intres 49 Demand Calculatio NS una aaa aaa aaa ananas enes enen esse teze a re eter ester ee sete ee entente sitne nnns 49 BI3uE MERIDIEM 49 Block Interval Demand Calculation 50 Rolling Sliding Demand Interval Calculation sseeeeeeees 50 Thermal EM ula ton aaa aaa aaa nenen eee vene eee eee eee vete eee eene nennen nennen 50 Cumulative Demand Values aaa aaa hana nana na aa nese enen ever ee eee re eee eee ver eee nore enne nenas 51 Continuous Cumulative Demand Values seen ee veres zere rene eee eee 51 Present Demasiada ndi de da dt
18. T L Register can accommodate a maximum of 65 535 pulses 16 bit per interval A maximum of 32 767 pulses per interval is allowed when using bidirectional quantities because the 16th bit is used for or MV 90 is a 16 bit system however the 16th bit is always used for or Since the 16th bit is always signed the maximum allowed pulses per interval is always 32 767 If MV 90 receives a number of pulses per interval larger than 32 767 MV 90 will record a negative number received value for that interval Itron recommends programming any D T L Register with load profile that is interrogated by MV 90 or any system that exports load profile information to MV 90 to use 15 bit resolution or 32 767 pulses per interval CENTRONO Meter Technical Reference Guide 57 Operation C12 19 C1SD C1ST and C1SL Versions Interval Lengths The load profile records data on a block interval basis The interval length is programmable 1 2 3 4 5 6 10 12 15 20 30 or 60 minutes The default is 15 minutes This interval length is independent of the interval length chosen for displayed demand quantities Power Outage The C12 19 CISL module can flag an interval when a power outage exceeds a specified number of seconds The power outage duration is programmable from 0 to 255 seconds The default is 60 seconds Channel Configurations The Load Profile register has up to eight channels of load profile interval data The pulse constant i
19. display mode by holding the magnet near the cover s magnet icon at the nine o clock position allows that display mode sequence to scroll one time during a locked non fatal error At the end of the display sequence the error message locks onto the display again e For non fatal errors transmission can be controlled via PC PRO Advanced software Non Fatal Errors Error Code Error Possible Cause s Error Description Low Battery Battery Voltage A low battery check is Error Low performed once a day and upon a set clock procedure A low battery continues to function however its reliability decreases over time As long as the meter is not powered down with a dead or missing battery the meter will continue to function as normal Battery Not Connected Properly If the meter is powered down with a dead or missing battery then when power is restored the meter s clock will be off by the duration of the outage and Load Profile and TOU will be halted Err 3 Time of Use e Current Season This is tested at power up at TOU Error is not midnight crossings at season programmed changes upon reconfigures e Current Yearis and upon set clocks not Depending on the cause of the programmed error it can be cleared with a e TOU halted due corrective reconfigure or with a to power down set clock with a good battery with dead or present missing battery
20. energy flow 22 42 forward kWh 42 G general meter troubleshooting 76 H Hall Effect principle 17 IDM Type 24 message 28 Interval Data Message IDM 28 K kWh annunciator 45 CENTRONO Meter Technical Reference Guide 87 Index L LAN address barcode 36 LAN Address ID 35 last season register 56 LCD CISC 37 LCD display 42 LCD module 22 LED 84 LED pulses 70 liquid crystal display See also LCD 45 load profile 28 63 load profile data 57 load profile module 41 Load Profile register 58 magnetic switch 45 63 77 mass memory 57 59 maximum demand 45 meter architecture 17 meter cover 63 metrology base 41 module LCD 22 load profile 41 register 62 N net register 22 non fatal errors 67 non volatile memory 42 45 53 normal display mode 44 O operating environment 6 operating temperature range CISC 37 optical pickup 70 optical port 42 47 52 optical port adapter 42 P personality module 45 76 CISD 41 CISL 41 54 57 CIST 41 54 load profile 63 power 62 TOU 63 power outage 54 primary security code 61 protocol SCS 41 pulse weight 58 pulse weight calculation 58 R rate 55 rate schedule 55 recycling tiv register current season 56 Load Profile 58 register module 62 repair iv reverse energy flow 22 42 reverse kWh 42 RF antenna 36 rolling demand 52
21. face of the meter Controls and Indicators on page 43 3 Through the use of TOU scheduling for specific reset dates and times 4 Through the use of programmable Billing Schedules and Self Reads When a demand reset is initiated the following events occur Asan indication of a demand reset the display flashes all eights for six seconds Thecurrent maximum demand values are added to the corresponding Cumulative Demand values A snapshot is performed 52 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions All Maximum Demand values are reset to zero All corresponding times and dates of maximum demands are cleared meters with timekeeping functionality only The number of demand resets is increased by one The number of in service days since the last reset is set to zero The time and date of the last reset is updated meters with timekeeping functionality only The normal mode display resumes Exception is when in Test Mode the display resumes with next item in display list As a security feature a demand reset lockout time can be programmed to prevent additional demand resets until the programmed time expires Cold Load Pickup Normally when power is restored to the meter after an outage a new demand interval is started and demand calculations begin immediately The meter can be configured to recognize a demand delay or cold load pickup CLPU time If a CLP
22. ida 5 Display FUDCUODS eiii die tt ENOK nasht sish sesht 6 Specifications orn ruset ER c PD 6 This technical reference guide explains the installation operation and maintenance of the Itron CENTRONO meter family Itron urges you to read the entire manual before attempting installation testing operation or maintenance of a meter To operate the Itron PC PRO Advanced Programming Software refer to the online user manuals that are installed with the PC PRO Advanced software The online software manuals are in Adobe Portable Document Format PDF and are accessible from the Windows Start menu The Adobe Reader is required to view and print these manuals The Adobe Reader can be downloaded freely from http www adobe com About This Manual This manual contains the following information as listed in the chapter descriptions below General Information Provides a general description operation physical and functional descriptions and complete CENTRON meter specifications Installation Gives instructions for the proper handling and installation Operation Base Describes the measurement technique used for the base on the CENTRON meter Operation C1S Provides a physical description and operational characteristics of the C1S watthour kWh only meter Operation CISR Provides a physical description and the operational characteristics of the CISR R300 900 MHz radio frequency personality module Operation C1SC Provides a physical
23. is discarded At the beginning of an interval the current interval demand is reset to zero and new demand values begin accumulating CENTRONO Meter Technical Reference Guide 49 Operation C12 19 CISD C1ST and C1SL Versions Block Interval Demand Calculation Block Demand calculations are based on user defined interval lengths The demand is the total energy accumulated during the interval divided by the length of the interval At each end of interval EOI demand calculations are made and EOI can be displayed on the LCD For block interval demand calculations are made at the end of each completed demand interval This method is similar to the way mechanical demand meters operate As load is applied to the demand register an indicating pointer and maximum demand indicator are driven upscale At the end of each interval the indicating demand pointer is returned to the Zero position and the maximum demand pointer retains its highest or maximum position Rolling Sliding Demand Interval Calculation A selected number of subintervals make up the demand interval At the end of each subinterval new demand calculations occur based on the last full demand interval and EOI can be displayed on the LCD The following quantities can be selected for rolling demand W d W r W net and W uni Block interval demand calculation is subject to peak splitting whereby it is possible for an electricity consumer to manipulate the load for limited peri
24. j SN F x Mf Ru f f i M I j 1 HI A M j i AD gy INN PA N NC ff 4 IBN T HI HI Figure 7 C12 19 CISD I L CISR2 R3 Dimensions The following dimensional measurements are shown in inches and centimeters Polycarbonate AAA ASAS 6 29 2 70 3 16 453 498 6 29 6 95 16 00 6 90 8 00 11 50 12 70 16 00 17 70 Shipping Weights The following weight measurements are shown in pounds and kilograms po Polycarbonate Glass Meter 1 38 0 62 2 75 1 25 4 Meters and Carton 8 90 4 04 13 96 6 35 96 Meter Pallets 214 97 30 335 152 30 CENTRONO Meter Technical Reference Guide 9 General Information Notes 10 CENTRONO Meter Technical Reference Guide CHAPTER 2 Installation In This Chapter A e E 11 Nor C P 11 Unpacking C e E I Eia 12 Selecting era KEE EAEE EARE SEA EA DES AAEE EE EEEN 12 Installing the Meter into Service 12 Programming the C12 19 CISD T L Meter 13 Retrofitting with Personality Modules eee 13 This chapter provides information about installing the CENTRON meter Inspection Perform the following inspections when you receive the meter nspect for obvious damage to the cover base and meter assembly Compare the meter and register nameplates to the record card and invoice Verify the type class voltage form number and other pertinent
25. lt xj x Xx x lt tast Season el Read regses X X werbsWeepg SSE X X ins o ares f X numerar Siena X X Number ofTestSubnenas Xd Tast merogaton Daea tme X X omo X X Program oap f X mwmp X eger ruse f X register maior E X SS mp fx Semen X SnapShot 1 2 SWR X X Sotware Revisor numer X X x x Xx lt x Xx XXI XXX X X X X XxX XxX x X XXX X X X XxX XxX X X X Time Remaining in Demand Subinterval X rovswpratondwe e X 48 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions Demand Registers Demands can be calculated from any of the four selected energy quantities The user can configure up to ten demand registers Demand Calculations To calculate demand the selected quantities are accumulated over a programmable time period 1 2 3 4 5 6 10 12 15 20 30 or 60 minutes depending on the programmed demand interval length At the end of the interval the accumulated values are stored in separate demand storage registers and the accumulating registers are cleared Incremental values for the next demand interval are then accumulated The maximum demand in a billing period is determined by comparing the demand values for the most recently completed interval to the respective readings presently stored in the peak demand re
26. meter is not powered from the AC line The clock is running from battery power when not powered from the AC line when the meter is programmed with the utility that requires clock or calendar functionality During programming as an option using PC PRO Advanced the user can choose to enable disable the clock Disabling the clock will prevent battery carryover however all programming parameters will be set Prior to meter installation the clock must be set to activate time keeping functionality and features When the meter is powered from the beginning of life the available battery capacity is 15 years of service life with a carryover capacity of 10 12 years Low Battery Error The firmware for each module monitors the voltage of the battery Once the voltage of the battery drops below 3 6 V an error message will be displayed Alternatively the Low Battery Error can be set to be ignored via programming software Three Button Reset To return the meter to its original factory setting you must perform a three button reset All programming of the meter will be lost when a factory reset is performed All security codes are also cleared To perform a three button reset follow these steps Activate the magnetic switch using a magnet position at the 9 o clock point on the meter Press and hold the Demand Reset button Press and hold the Test Mode button A oO N While continuing to hold all buttons cycle the power on You do not need
27. radiating elements should be installed to ensure that a minimum separation distance of 20 cm is maintained from the general population CENTRONO Meter Technical Reference Guide iii Canadian Interference Causing Equipment Regulations This Class B digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Cet appareillage num rique de la classe B r pond toutes les exigences de l interf rence Canadienne causant des r glements d quipement L op ration est sujette aux deux conditions suivantes 1 ce dispositif peut ne pas causer l interf rence nocive et 2 ce dispositif doit accepter n importe quelle interf rence re ue y compris l interf rence qui peut causer l op ration peu d sir e Factory Repair of Meters Itron recommends that all repairs be performed at the factory Certain repairs may be performed by the user however unauthorized repairs will void any existing warranty All surface mounted parts must be replaced by the factory Repair of Meters Under Warranty If the meter is under warranty then Itron Inc will repair the meter at no charge if the meter has failed due to components or workmanship A return authorization number must be obtained before
28. radio frequency transmission Testing the CTSR Tamper Counter SCM Testing In order to test the power removal counter the meter must sense a shaken condition associated with a power outage Place the meter in a socket Apply power to the meter Remove the meter from the live socket A O N Replace the meter in the socket The meter has incremented the removal tamper counter The C1SR uses the power outage the meter being removed from a live socket in conjunction with the meter being shaken simultaneously to increment the power removal counter In order to test the inversion counter the meter must sense reverse current flow 1 Place the meter in the meter socket inverted test LED pointing down 2 Apply a load to the meter in the forward direction The meter has incremented the inversion counter due to reverse energy flow through the meter The inversion counter increments when the meter senses reverse current flow The metrology board senses reverse power flow and sends this status to the CISR personality module The CISR then increments the counter and transmits the count As part of the 96 bit Standard Consumption Message 4 bits are allocated for tamper indications which include the power removal and meter inversion counters The table below shows the removal and inversion information based on the reported tamper count 32 CENTRONO Meter Technical Reference Guide Operation C1SR Version RF Tamper Co
29. range CENTRONO Meter Technical Reference Guide 37 Operation C1SC Version A watt disk emulator is located on the lower right hand corner of the display The indicator consists of three square segments in the lower right hand corner of the display which scroll in the direction of energy flow The figure below illustrates this revision Figure 30 CISC LCD The display will scroll between the billing register and the segment check mode based on the factory programming option Option Description 1 7 second billing register display 1 second blank 7 second segment check display 7 7 2 7 second billing register display 1 second blank 1 second segment check display 7 1 3 Only the billing register is displayed 7 0 Resetting Values The CISC can be reset using the Cellnet Shooter device in conjunction with a computer Programming the C1SC CN1SC The CENTRON CISCICNISC Cellnet personality module programming port is located such that the CENTRON inner cover does not have to be removed when programming or testing the Cellnet module In order to communicate with the CENTRON Cellnet module insert the programming slide into the hole in the inner cover of the CENTRON meter that is located at the 12 o clock position as shown in the figure below 38 CENTRONO Meter Technical Reference Guide Operation C1SC Version Sun CL 200 2404 30 TYPECIS JOTA 1 CK P mm a t 35 630 83 Figure 31 CISC CNISC Pr
30. rolling interval 49 S schedule calendar 55 daily 55 rate 55 seasonal 55 SCM message 31 SCS protocol 41 Season Change date 55 seasonal schedule 55 secondary security code 61 security code primary 61 secondary 61 tertiary 61 self read 42 52 53 Shooter device 38 specifications operating environment 6 Standard Consumption Message SCM 28 support features 67 switch demand reset 52 test mode 45 T tertiary security code 61 Test annunciator 45 test codes AEP 71 test display mode 45 Test LED 17 Test Mode 70 test mode annunciator e 45 70 test mode button 45 63 test mode switch 45 88 CENTRONO Meter Technical Reference Guide testing energy 67 field 67 support features 67 TOU schedule 67 three button reset e 63 time blocks 54 Time of Use TOU See also TOU 41 TOU 54 63 70 TOU annunciator 70 TOU rate indicators 45 TOU schedule testing 67 troubleshooting blank display 76 communication problem 77 general meter 76 magnetic switch 77 no accumulation 76 U utility billing ID 35 VV watt disk emulator 37 45 Index CENTRONO Meter Technical Reference Guide 89 Index Notes 90 CENTRONO Meter Technical Reference Guide
31. s Manual Power Procedures Applying Power Personality Modules are powered directly from line voltage via the board to board connector These modules are energized when AC power is present During power outages the permanently installed lithium battery runs the clock circuit on CIST and CISL versions The battery normally lasts for the life of the meter However in the unlikely event of a low battery notification the battery or Register Module may need to be replaced Power Down Procedures To de energize all electronics remove power from the meter A power outage is recognized any time the line voltage drops 20 percent below the lowest nominal point of the voltage range When a power outage is recognized the D T L Register saves all billing values to non volatile Flash memory 62 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions Battery Life Load Profile amp TOU The CENTRON meters with timekeeping functionality have a soldered battery present on their circuit boards This battery powers the clock when AC power is interrupted to the meter Upon restoration of AC power all self diagnostics are completed and data is retrieved from non volatile memory The real time is retrieved from the real time clock The elapsed time of the outage is also added to the stored value for the time spent on battery A very small amount of current is required to keep the real time clock running when the
32. system parameters and FCC compliance final test is performed via RF to verify a correct LAN address meter ID number of digits and RF signal Physical Description The CISC is constructed of a flame retardant glass filled printed circuit board material which supports the discrete surface mounted and integrated circuitry components A slot antenna etched on the circuit board serves as the RF antenna The C1SC board snaps into the meter register mounting brackets to ease in the installation of the board The LAN address barcode and interpretation is placed on the LCD housing for meter identification The C1SC personality module is attached to the metrology board using a board to board connector The following information is passed from the metrology board to the C1SC Line Voltage Reference Voltage Energy Flow direction Energy pulse data Line frequency The C1SC has two additional labels called the meter change out labels that are affixed to the bottom of the meter The change out labels are identical and contain the AEP barcode information and a utility descriptor Transmission Scheme The RF transmission is spread spectrum using Binary Phase Shift Keyed BPSK modulation A chipping signal is used to spread the carrier and actual data is on off keyed OOK The modulator output drives the amplifier chain that provides a signal of approximately 100mW The antenna is tuned for maximum efficiency at the carrier frequency
33. the factory accumulation for repair Error Codes C12 19 C1SD T L Fatal errors cause the display to lock on the error code because of the possibility that billing data may have been corrupted or that the meter may not be operating correctly If multiple fatal errors occur the one with the lowest number will be the error code that locks on the display 72 CENTRONO Meter Technical Reference Guide Testing Troubleshooting and Maintenance The different fatal errors should be handled as described in the table below Fatal errors can only be cleared by performing a Factory Reset on the meter A Factory Reset will wipe out all information in the meter so be sure to try to retrieve any meaningful data from the meter prior to performing the Factory Reset The meter must be reprogrammed after a Factory Reset has been performed Error Code Error Possible Cause Error Description FAIError1 7 FAIError3 PAE rror4 Front End Processor Error PAE rror5 PAE rror6 FNError7 Operating System Error The meter has detected a problem vvith the program memory The meter has detected a problem vvith the RAM The meter has detected a problem vvith the data flash non volatile memory A problem has occurred vvith the metrology portion of the meter A problem has occurred vvhile saving billing data at time of a povver outage The meter has detected a problem vvith the file system The meter has
34. three modes of operation The displayable quantities are configured through PC PRO Advanced Normal Mode In Normal mode the module display automatically sequences through the programmed display items in the programmed sequence Each item is displayed for the program specified period from 1 to 15 seconds followed by a brief pause Annunciators are available for selected quantities Only the annunciator appropriate to the selected item can appear while its data is displayed Each display can have a maximum of 3 alphanumeric characters for identification Valid entries are A Z a z and 0 through 9 The meter will continue to operate in Normal mode until power is disconnected the Alternate display sequence is initiated Test mode is selected or a fatal error condition occurs Alternate Mode The Alternate mode provides an additional set of customizable display items that are not typically used for billing applications The Alternate mode is accessible only from the Normal mode when activated using either the magnetic switch or a meter programming device Use a magnet to activate the Alternate mode Place a magnet near the switch located at the 9 o clock position on the side of the module The magnetic switch can be accessed with the meter cover in place To activate the Alternate mode with a programming device refer to the PC PRO Advanced documentation Immediately upon activation Alternate mode is indicated by a flashing ALT annunciator
35. to hold the buttons while turning the meter OFF only while turning it ON 5 Once complete the meter may display 3BReset or nordiSP and all segments will blink The original factory settings of the meter are restored CENTRONO Meter Technical Reference Guide 63 Operation C12 19 C1SD C1ST and C1SL Versions RF Options As an option the C12 19 D T L register can be ordered with R300CD CD3 functionality The R300CD CD3 continuously transmits Standard Consumption Messages SCM and Interval Data Messaging IDM using radio frequency in the unlicensed frequency band which can be read by handheld drive by or fixed network systems The table below describes the various versions of the RF option Option SCMERT Type IDM ERT Type Description R300CD N A Two ERT register without IDM R300cD3 08 24 Three ERT register with IDM The transmission frequencies the frequency hopping pattern and the time interval between transmission cycles are random in nature thus providing a method for avoiding interference with transmission from other devices Each SCM message contains tamper information Below is a chart that indicates the tamper information available in each SCM SCM Indicator Group EEE r RE TJ I 1 year from end of warning Ja 3 2 Non Billing Warnings Tamper Event and Alarms Indicator Behavior Two bits are used to log the above alarm event and tamper occurrence Groups
36. will be added to the cumulative register A Demand Reset will clear this error If a full scale overflow occurs check the installation to ensure that the current capacity of the meter has not been exceeded A full scale overflow error in no way affects the existing billing data CENTRONO Meter Technical Reference Guide 75 Testing Troubleshooting and Maintenance Inspecting and Troubleshooting General Due to the modular architecture of the CENTRON meter modules of similar voltage 120V or 240V may be interchanged Therefore the personality module of the CENTRON you are troubleshooting can be placed on a known working base to verify proper operation of the personality module Likewise a known working personality module may be placed on the base of a meter to verify proper operation of the meter This section provides a list of the most likely problems that you may encounter along with possible causes and solutions Blank Display Cause Solution Power not applied to the meter Apply power Remove and re seat board to board connector Loose power supply connection LCD LCD Driver failure Replace Register circuit board Note Energy reading and tamper flags may be uploaded with the ZRO C2A Time and Date Wrong TOU Version Time Date Wrong in PC or Handheld Device Verify and update time date in programming device and download new time and date to meter Refer to the appropriate software ma
37. 2 that flows through the conductor looped around each core The voltage Vout and Vout2 that is formed on each Hall Effect device is proportional to the watts produced by each phase CENTRONO Meter Technical Reference Guide 19 Operation Base Metrology Each Hall sensor output voltage is amplified by a differential amplifier in order to bring the signal within the nominal level of the ADC ADC 1 sums the signal from ADC 1 and ADC 2 The output of ADC 1 is integrated over time to get the energy information Each time the integrated signal exceeds a predetermined amount of energy a pulse is generated The pulse stream is accumulated into a counter When the accumulated pulses reach a threshold a Wh pulse is emitted and the meter LED is flashed The counter threshold is programmed at the factory and serves as the permanent gain calibration for the life of the product The calibration is a digital feature and has no variation or adjustment ADCS 1 and 2 are calibrated independently which means that each phase is calibrated independently fe FN J j Magnetic Core NA I LE as B MIU eee ST M X IL D Leo V pe I Vau 6xVxl ADC 1 SE linet blas BiasRes Bied gt Integration U I Calibration Register Module EXON E en V WT I Vor GxVxl ADC2 erai BiasRes Mt Mem Integration y Calibration Be Magnetic Core Figur
38. CISR The ZRO C2A requires that the meter Not Be Powered Wait three 3 seconds after power removal to install the probe to ensure the meter has had sufficient time to power down The device connects to the CENTRON meter through a hole in the plastic inner cover located at the 12 o clock position on the meter Extending from the ZRO C2A is a cable terminating in a connector which mates to the programming connector of the CENTRON Beginning February 20 2002 the CISR module for the CENTRON meter uses a new EEPROM component This new EEPROM operates at a different voltage level requiring revision to the CENTRON resetter CAUSE DAMAGE to the personality modules on both the C1S LCD and C1SR meters produced after the new EEPROM implementation date Use of a ZRO C or ZRO C2 resetter without the C2A upgrade WILL damaged modules will show Error on the display All current production resetters and resetters produced after June of 2001 were built with the C2A upgrade and are labeled accordingly as shown below Although personality modules with the new EEPROM are only compatible with the C2A version of the CENTRON resetter ZRO C2A the older revisions of the personality modules are also compatible with the ZRO C2A CENTRONO Meter Technical Reference Guide 23 Operation C1S Version C2A Figure 19 Reverse Side of ZRO C2A Resetter LCD Display Function This display uses five 7 segment digits four icons to indicate the type of
39. IR ai iii RHE Exposure Information oracion iii Canadian Interference Causing Equipment Regulations ssssssssss iv Factory Repair of Meters c siin anaia a seen eee eee tere vete eee ns tete ee teres ete eee rete iv Repair of Meters Under Warranty enne trennen iv Repair of Meters Not Under Warranty oooooconcccnnncninnccnnncccnocccnnnnn conan nano cnn rca enne nes iv Service Return Address 1 uri indeve die ee repe etr ia LA ira dde iv Recycling Information em c iv General Information e 1 About This Man al 5 ie di dd t dti at aS ET Eade 1 General Descriptio Mairs anges n 2 Physical Description tee sis iet renis tee gu Re hst 3 Meter Bases ecuria HEEL 3 Personality MOOUIES aaa aaa aaa ananas seen see e ee enes veres sere see tree eter ever ee sene eset se tere v ere eee eee 4 Product Availability cn ne e ev e E S 5 Dd a Er 5 AN oo 6 Display FUNCIONS e NE sa 6 Specifications ti o ode a en dL opis doceo C NELLE LE 6 fe M RET 6 Operating EN Viron MON a ananas nenes ener tet eee tete sete ee tete ee ens nnns nnne 6 Characteristic Data vv Lets der tee berit dd ad dh d de d pas 7 Burden Data icit ee hd ne 7 Technical Data mrio va ite ice pei e d dap ec Mee ede eae 8 BIMENSIONS E 8 C1SD C1ST C1SL Dimensions sse 9 Shipping Weights sisirain iinr aeie e P Hee a EU eure eed eed d 9 Installation na odio n padre cuero OR E eS dp x duo ERE KE S aed d
40. Knowledge to Shape Your Future CENTRONO Meter Technical Reference Guide Effective Date October 2006 Proprietary Rights Notice This manual contains the trade secrets and confidential information of Itron Inc which are not to be divulged to third parties and may not be reproduced or transmitted in whole or part in any form or by any means electronic or mechanical for any purpose without the express written permission of Itron Inc All rights to designs or inventions disclosed herein including the right to manufacture are reserved to Itron Inc The information contained in this document is subject to change without notice Itron Inc reserves the right to change the product specifications at any time without incurring any obligations Trademarks Used in This Manual CENTRON and PC PRO are registered trademarks of Itron Inc Windows is a trademark of Microsoft Corporation Cellnet is a registered trademark of Cellnet Technologies Inc CENTRONO Meter Technical Reference Guide 100299GM 02 Itron Inc Corporate Headquarters 2111 North Molter Road Liberty Lake WA 99019 U S A Tel 866 374 8766 Fax 509 891 3355 www itron com Itron Inc Oconee Electricity Metering 313 B North Highway 11 West Union SC 29696 U S A Tel 864 638 8300 Fax 864 638 4950 Copyright 2004 2006 Itron Inc All rights reserved CENTRONO Meter Technical Reference Guide Compliance With FCC Regulation
41. Lists TOU Operation This section describes TOU operation specific to the meter display Several TOU indicators are available on the liquid crystal display LCD Rate Annunciators and Active Rate Indicators Rate annunciators are available with each demand and energy register An A B C or D will be displayed on the far right side of the LCD to indicate the rate period for each quantity being displayed The rate annunciator that may be displayed for the Total Rate is t If the rate annunciator is flashing while a demand or energy value is displayed the annunciator indicates that it is the current rate in effect This gives a quick indication that the register is programmed with the correct TOU schedule and that it is currently set to the correct time Season Change At the end of a specified season all last season registers are updated with current season register data The meter can be programmed to either delay the season change until a demand reset occurs to activate an automatic demand reset at season change or to change the season without performing a demand reset A season change occurs at midnight at the end of the programmed season change date or at the first demand reset following the season change date depending on how the meter has been programmed Some utilities program the season change to occur at the first demand reset following the season change date to make season changes concurrent with the meter reading cycles
42. Log Cleared Event Log was cleared by programming software Full Scale Overflow Non Fatal Error Codes for description Load Profile Error Non Fatal Error Codes for description Logon Successful a user or option board logged on successfully to the meter Low Battery Non Fatal Error Codes for description Meter Reprogrammed meter was initialized or reconfigured Power Outage power was lost Power Restored power was restored Rate Change TOU rate change occurred Register Self Read self read occurred Reverse Power Flow Non Fatal Error Codes for description Reverse Power Flow Restored delivered power flow resumed after reverse flow exceeded a configured threshold Season Change TOU season change occurred Security Fail logon with security code failed Security Pass logon with security code succeeded Test Mode Entered Test Mode or Alternate Test Mode was entered Test Mode Exited Test Mode or Alternate Test Mode was exited Time Changed a time adjustment forward or backward occurred TOU Schedule Error Non Fatal Error Codes for description Security Codes Register security can be provided with primary secondary and tertiary security codes that prevent unauthorized communication with CENTRON products A Primary security code allows complete access to the meter A Secondary security code allows full read access with limited write access to perform an automatic demand reset an
43. Reference Guide 77 Testing Troubleshooting and Maintenance Reset Mechanism Does Not Initiate Demand Reset Reset Has Occurred Within Last Programmable Time Period Manual demand reset cannot occur within 60 seconds of the previous demand reset Wait 60 seconds before trying again Reset Switch Disabled Reset switch may be disabled through software Register Board not Properly Installed in Upper Housing Verify that the Register board is fully engaged with the upper inner cover Demand Reset Cannot Be Initiated Through PC or Handheld Insufficient security Communication cannot be established See Programmer Cannot Communicate with Meter Test Mode Switch Does Not Place Meter in Test Mode No display items in Test Mode Display List Switch deactivated by software Activate switch in software and reprogram meter Register Board not Properly Installed in Upper Housing Verify that the Register board is fully engaged with the inner cover Switch or Electronic Failure Return meter for repair Inspecting and Troubleshooting C1S LCD and C1SR Blank Display Power Not Applied to Meter Apply voltage to the meter Voltage Too Low for Meter Startup the CENTRON meter requires at least 20 of nominal voltage to start up Component Failure Return the meter for repair Board to Board Connector Not Seated Verify proper connection of board to board connector 78 CENTRONO Meter Technical Reference Guide
44. Reference Guide Index A ADC 17 19 AEP barcode 36 AEP test codes 71 alternate display mode 44 Alternate mode annunciator 45 analog to digital converter ADC 17 annunciator Alternate mode 45 disk emulator 71 EOI 45 kWh 45 Test 45 test mode 45 antenna RF 36 Application Specific Integrated Circuit ASIC 17 ASIC 17 automatic demand reset 53 automatic meter reading AMR 28 barcode AEP 36 LAN address 36 base metrology 17 battery 62 83 life 63 baud 47 Binary Phase Shift Keyed BPSK modulation 36 blank display 76 block demand 52 block interval 49 BPSK 36 button test mode 45 C calendar schedule 55 calibration 17 Cellnet RF technology CISC 35 Cellnet Shooter 38 CENTRON developer s kit 17 communication optical port 42 communication problem 77 comparator 70 controls and indicators 43 cover 63 CRC 35 current interval demand 45 current season register 56 Cyclic Redundancy Checks CRC 35 D daily schedule 55 demand calculation 49 demand reset 52 automatic 53 demand reset button 42 63 demand reset switch 52 detent register 22 disk emulation annunciator 71 display modes 44 E electronic load indicator 45 energy testing 67 EOI annunciator 45 ERT Type 7 message 28 F factory programming 22 fatal errors 67 FCC Compliance iii field testing 67 forward
45. TOPrMS M M 83 NOSI EEEE e e ie 87 viti CENTRONO Meter Technical Reference Guide Table of Figures ENS _____ a Figure 1 CENTRON Personality Modules sess nnne 3 Figure 2 CENTRON 120 Volt Metrology ooooonococonoconnnccononccnnccnnn naco concc ono 4 Figure 3 CENTRON 240 Volt Metrology sssssesseeeneneeee sete re enen ee teres vere ennt 4 Figure 4 CENTRON 20 Amp Metrology cccoccoonocinonicaconccononinanona nano cononcc narran cnn cnn 4 Figure 5 CENTRON Personality Module Assembly sse 5 Figure 6 DIMENSIONS cete te pta on EU aa ias 8 Figure 7 C12 19 C1SD T L C1SR2 R3 Dimensions sse 9 Figure 8 Removing the Board to Board Connector sssssssseeeenneennes 14 Figure 9 New Module Snap in sssssssssseseeseeenee enne nennen tete enteve teen ens 15 Figure 10 Circuit Board Notches sssssssssssesesseseeeeennennen nennen tentent nnne ns 15 Figure 11 Board to Board Connector Bottom esssessssssssseseeeee nene nnne 16 Figure 12 Board to Board Connector Top ssssssssssssss ever ee enen ente rere zere 16 Figure 13 Power Measurement Principle in 2S Meter ssssseeeeneene 18 Figure 14 Simplified CENTRON Architecture cooooonccccncconoccconocanonoccnoncnnnnn nan nn cn nan cn narran rn 18 Figure 15 Hall Cells and ADCS iiiar aieiaie
46. The ALT annunciator will not appear unless an Alternate mode display has been programmed Once the Alternate mode has been selected the display will sequence through the program items until the programmed mode timeout expires The quantities displayed are selected during programming and have the same display timing as in Normal mode Like the displays in Normal mode each display in Alternate mode can have maximum of 3 alphanumeric characters to identify each item Valid entries are A Z a z and 0 through 9 The operations performed in Normal mode are identical to those in Alternate mode 44 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions Test Mode The meter can be placed into Test Mode either by pressing the TEST button or through software communications Manual use of the TEST button can be disabled via PC PRO Advanced software If the TEST button is disabled through programming the meter will not enter Test Mode when the button is pressed While in Test Mode the TEST annunciator is displayed on the LCD When the Test Mode is activated all billing registers and certain non billing registers are preserved in non volatile memory and are restored when Test Mode is exited To exit Test Mode press the TEST button The LCD will display nordiSP normal display signifying the exit of Test Mode and entry into Normal Mode operation Test Mode Timeout If left in Test Mode the meter wi
47. U is configured in the meter the meter will delay demand calculations for the configured amount of time 0 to 255 minutes in one minute increments For example if a CLPU time of five minutes is programmed into the meter a power outage will cause the meter to wait five minutes after power restoration before resuming demand calculations TOU Load Profile Meters All meters with timekeeping functionality have a battery installed The battery allows the TOU and Load Profile data in RAM to be maintained during a power outage The battery also allows the timekeeping circuitry in the meter to maintain the meter s clock during an outage Upon the return of AC power the register undergoes a procedure similar to the initial power up The meter performs self diagnostic checks data is retrieved from non volatile memory and normal operation is resumed The amount of time in minutes the meter was sustained by the battery during a power outage is added to the Time on Battery register Since the demand interval is synchronized to the top of the hour the first demand interval after a power outage may be shorter than the programmed interval value Self Reading and SnapShot Registers All CENTRON C12 19 D T L meters are equipped with two snapshot registers The snapshot registers store self read data that was triggered by a demand reset Snapshot 1 contains the most recent demand reset data Snapshot 2 is the next most recent set of self read data at dema
48. actory and serves as the permanent gain calibration for the life of the product The calibration is a digital feature and has no variation or adjustment All the processing steps described above are integrated into an Application Specific Integrated Circuit ASIC to improve reliability and reduce cost Ine A NA f J J Magnetic Core f fA B QU mn i bios Hall Van GX VXI Integration H Bias Res h senm i Caoran UU VUAN Register Module Figure 14 Simplified CENTRON Architecture 18 CENTRONO Meter Technical Reference Guide Operation Base Metrology The custom ASIC cancels all the offset generated by the meter and removes the need for a light load adjustment of the metrology This allows the meter to have excellent accuracy over a very large dynamic range especially at the low current levels For this reason no offset adjustment is needed or provided for the CENTRON meter There is a slight phase shift in the current to flux density conversion due to eddy currents in the magnetic core material This shift causes a small power factor error that is uniform across the dynamic range load curve of the meter Itron compensates for this shift in the CENTRON by the use of a capacitor in the biasing current circuit This correction is permanent The custom ASIC provides Wh pulses to drive the Test LED The same signal is also provided to the electronic registe
49. ade ERR E iN CER UE EV RN MN ERE 11 INSP CUON riot lira 11 Balloon nro 11 Storage ere errr O 11 UnpackINd traia nn a aia 12 Selecting A Stent a as 12 Installing the Meter into Service una seen eee eee sene seen es ee nese teres nana 12 Programming the C12 19 C1SD T L Meter enne nnns 13 Retrofitting with Personality Modules sse 13 Operation Base Metrology 21 rini rac eni iaa u inna aan sacas eo eda aa cana ane an ndon se 17 CENTRON 18 2S CL200 and 3S8 sssssssssssssss esee entente terre nnn senten nens 17 CENTRON 28 CL320 4S 12 258 seen entente nnns tres terre enn senten nenas 19 CENTRONS Meter Technical Reference Guide V Table of Contents Operation C1S Version e ecce eee eee eee eee eee ecce eee eee 21 Physical Description Personality Modules aa aaa uuh kana aaa an na anen ee ene eseve eee eee re eee 22 FRE GISLCTS RP TE 22 IllowattiElours toe Ie eee dilata 22 Resetting Values ZRO C2A duna aaa nane neve eee eee eee cnn cnn 23 EGD DiSplay FUncltiOn oet t td ete ida Eee ede deben duets 24 Non Detented Register oomen tror a ee date tee dte 25 Detented Register eene edet iaa 25 Net Register xtti ete a ht cats aul o dto tes Ata 25 Segment euro SERM 26 Factory Programming Options aa a aaa aaa anen e zere epet e eee eee ee entente inrer sinn entrent 26 Display TIMING idres e e Ra a e 26 Digits and Multipl
50. antities can be selected for thermal demand W d W r W net and W uni The thermal demand option has only one demand interval available This interval length response time is 15 minutes When you enter into Test Mode this interval length is fixed at one minute Q Thermal demand is not available if TOU is enabled Cumulative Demand Values Cumulative Demand is the summation of previous maximum demands after each demand reset When a demand reset occurs the maximum demand values are added to the existing corresponding cumulative demand values and the sums are saved as the new cumulative demands These values will not increase until the next demand reset This feature not only protects the user from false or erroneous readings but also provides the customer with extra security against tampering Cumulative demand may be used for block rolling and thermal demand types Continuous Cumulative Demand Values Continuous Cumulative Demand is the sum of the maximum demand and the cumulative demand at any point in time At the end of each demand interval if a new maximum demand is reached continuous cumulative demand will also be adjusted to reflect this new maximum demand value A demand reset will clear the maximum demand value but will not affect the continuous cumulative demand Continuous cumulative demand may be used for block rolling and thermal demand types Present Demand Present Demand is the value that would be used if an EOI we
51. be performed after this self read A Self Reading Schedule can be set to occur in the following ways Read daily Read n days after a demand reset Read on the nth day of the month Read n days before the end of the month Read on custom schedule Time of Use The Time of Use TOU functionality is designed for use in billing applications where multiple rates bins are required for energy and demand TOU Schedules Schedule information is programmed on a PC using the PC PRO Advanced software packages When using TOU functions on a meter energy and demand registration are segregated into time blocks during the day Each time block can be one of four rate periods In addition to these four rate periods a total rate is also available 54 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions Calendar Schedule The calendar schedule contains all daily and yearly information needed for the meter to measure and register data in real time The TOU calendar is programmable for up to 25 years and accommodates leap year daylight savings time and recurring holidays The schedule contains daily patterns seasons and holidays with programmable day types rates and outputs For information concerning the entry of these parameters into the PC PRO Advanced software package consult the PC PRO Advanced System Manual This manual is installed with the PC PRO Advanced software and is accessible thro
52. ce Guide Installation The practice of knowingly installing Form 12S 25S meters into metering sockets with either missing or disconnected fifth terminal jaws in the meter socket is NOT recommended for CENTRON Form 12S 25S meters The following guidance should be followed when using the Form 128 258 CENTRON meter e This version of the meter should not be used in a non Form 12S or 25S metering service e The meter s 5th terminal should be properly installed on the meter in a location defined in the CENTRON Technical Reference Guide e The fifth terminal jaw in the meter socket should be properly connected to the service neutral and installed in the correct location e The metering service should match the class form and voltage rating on the meter s nameplate Failure to follow these recommendations will result in damage to the CENTRON Form 12S 25S meter and void all product warranties Programming the C12 19 C1SD T L Meter The personality module should be powered prior to programming The module can be programmed using the optical connector The communications rates through the optical tower are 9600 baud to 28 800 baud Refer to PC PRO Advanced documentation for detailed programming information Retrofitting with Personality Modules CENTRON meters can be upgraded to increase functionality by changing the Personality Modules the meter OFF before removing the inner cover Personality modules are sensitive to ESD damage
53. ceived energy is subtracted from delivered energy The net energy value is then displayed on the register Net metering is not available with the IDM option 30 CENTRONO Meter Technical Reference Guide Operation C1SR Version Resetting Values C1SR The ZRO C2A Resetter zeros both the energy registers and tamper counters by direct connection to the CISR module For more information see the ZRO C2A Handheld Meter Resetter for the CENTRON CIS and CISR Operating Instructions Transmission The CISR R300 communicates within the unlicensed 910 920 MHz frequency band The transmission frequencies the frequency hopping pattern and the time interval between transmission cycles are random in nature thus providing a method for avoiding interference with transmission from other devices FCC Regulations The CISR communicates in the unlicensed 910 920 MHz band governed by the US Code of Federal Regulations CFR Title 47 Part 15 Radio Frequency Devices Sub Part C Paragraph 247 Intentional Radiator Changes or modifications not expressly approved by Itron could void the users authority to operate the equipment Testing the RF Message In order to confirm the CENTRON meter is transmitting SCM messages the meter is capable of a factory test mode If the meter has less than 50 Watt Hours of accumulated energy it will enter factory test mode The meter will transmit multiple SCM messages in this mode This mode is also useful duri
54. ck indicates temporary scroll lock of a display item Selection of Normal or Alternate sequence Entry into Normal Mode Entry into Test Mode The indicators shown in the table above actually display in a digital readout font some characters may display as upper case The Watt Disk Emulator does not The watt disk emulator can represent the delivered or received power as follows Energy accumulation in meter GUCI nndzo CU IL wa JE s MU gt is JC 6 lt J CIC B whaes LL gt Whd 6 Ener y accumuation in meter lt LJ al C gt Whr 0 JO Ce wrest NN e BN res PI c v lt lt jC res SOO wes 46 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions Optical Port The optical port is mounted on the meter cover The optical port is a communication interface from the meter to a PC Interface to a PC is accomplished through a communication cable which attaches to the optical port on one end and a PC serial port on the other end This interface cable can be powered by a DC TAP an AC Adaptor or the PC s COM Port Communication through the optical port may be at 9600 14400 19200 or 28800 bps Programmable Functions The CENTRON personality module can be programmed using the PC PRO Advanced software The table below depicts each display item available for each display mode The display items and sequence of their display along with any desired annunciators or I
55. ctronic Detent Programming electronic detent prevents received energy from accumulating in the delivered energy register When detent is enabled the received energy is accumulated in a separate register Error Codes Monitor operation of the meter Error codes are available for display in Normal Alternate and Test display modes Event Log Log used to record historical events that occur in the meter The events that can be logged must be configured via the PC PRO Advanced programming software Firmware The computer program stored in a read only memory ROM or an erasable programmable read only memory EPROM integrated circuit Flash Memory A type of EEPROM chip used for easy and fast information storage It is a solid state storing device IDM The Interval Data Message IDM contains consumption data for timed intervals that can be used for calculation of demand and time of use billing Last Season The season immediately preceding the current season LCD A solid state Liquid Crystal Display LCD is used to show power consumed as well as other metering information LED A Light Emitting Diode LED is used to signal the occurrence of an event or the presence of a pulse Load Profile The functionality of a meter to accumulate pulses in proportion to accumulated energy in programmed intervals Often referred to as Mass Memory Magnetic Switch A solid state or mechanical switch which is closed by
56. ctronics Failure Incorrect Baud Rate Optical Probe Cable Assembly COM Port in PC is Set Wrong Security code in Module Probe Not Connected Properly Optical Connector Failure Check cable with known register that communicates Check cable against known cable that is functioning Also check batteries in cable assembly Verify proper COM Port number has been selected in the programming software If the wrong COM Port is selected communications will not occur If security codes have been downloaded to the register the programming device must have the proper code to make connection to the module Verify security codes in the programming software Verify Optical Probe lines up properly over the optical connector Re install cover for proper alignment Verify PC or handheld and cable are securely connected and attached to the correct Com Port Replace cover assembly Replace module Optical port can be programmed to operate at 4800 or 9600 baud Factory default baud rate is 4800 For C12 19 D T L the optical port operates at 9600 14400 19200 or 28800 baud The factory default is 9600 baud Reed Switch Does Not Activate the Alternate Mode Cause Reed Switch Failure Magnetic Field is too Weak Alternate Mode Items Not Selected Place magnet closer to switch or use stronger magnet Replace module Re program meter with items to be displayed in Alternate mode CENTRONO Meter Technical
57. d for each year in the calendar schedule If multiple seasons are not used the TOU schedule contains one year round season Season changes occur at midnight of the season change date where midnight corresponds to 00 00 hours or can be designated through programming to occur at the first demand reset following the season change date CENTRONO Meter Technical Reference Guide 55 Operation C12 19 C1SD C1ST and C1SL Versions Registers The CENTRON meter can measure up to four energies and ten demands When the meter is configured for a TOU calendar all energies and demands that are selected for measurement also have the configured TOU rates applied to them with the exception of previous projected and instantaneous registers The TOU energy and demand registers are available for display as well Current Season Register All energy and demand registers selected for the active season are considered current season registers If a single rate schedule is applicable year round then only current season registers are used Last Season Registers Last season registers are available when two or more seasons are used during the year For every current season register with the exception of Cumulative and Continuous Cumulative registers there is a last season register for the same quantity Last season registers are designated LS in the programming software Last season registers can be selected for display in Normal and Alternate Display
58. d on the circuit board serves as the RF antenna The CISR personality module easily snaps into the meter module mounting bracket This module is then electronically attached to the metrology board via a board to board connector 28 CENTRONO Meter Technical Reference Guide Operation C1SR Version The following information is sent to the personality module from the base metrology board ine voltage Reference voltage Energy flow direction Energy pulse data Line frequency The CISR contains contacts on the module board located at the 12 o clock position behind the LCD for resetting the energy register and tamper counters This can be accomplished with the ZRO C2A Resetter The CISR uses a unique module identification number ERT ID provided by Itron This ID number is contained in each message transmission and is used by the handheld and billing system to determine meter identity and location The ERT ID number which is contained on a bar coded label is placed on the LCD housing directly above the LCD display C1SR Display The CISR personality module is only available with a liquid crystal display LCD The LCD is automatically adjusted for contrast over the operating temperature range Figure 26 CISR LCD This module can be configured to display either four or five digits of energy consumption and will rollover at 100 000 kWh for both self contained Form 18S 2S 12S 25S and transformer rated meters 3S
59. d to access the Alternate and Test modes A tertiary security code allows read only access For more information about security codes refer to the PC PRO documentation CENTRONO Meter Technical Reference Guide 61 Operation C12 19 C1SD C1ST and C1SL Versions Firmware Upgrades PC PRO Advanced 7 2 and higher supports upgrading firmware for CENTRON meters When the firmware is upgraded all billing data in the meter is erased After a meter s firmware is upgraded you must re initialize the meter You can determine which version of CENTRON meter firmware is installed on your PC by looking at Add Remove Programs in the Control Panel Start Settings Control Panel and reading the Support Information for the CENTRON meter firmware The firmware version is also displayed each time you begin a firmware upgrade while logged on to a CENTRON meter Canadian installations If a Canadian meter has not been sealed the firmware can be This feature is not available for meters that have been initialized sealed for O upgraded Installing CENTRON Meter Firmware on the PC You must install the CENTRON meter firmware on your computer to make it available to PC PRO Advanced You can obtain firmware upgrades through your Itron Inc Sales Representative You can install only one version of CENTRON meter firmware on a computer For more information refer to your PC PRO Advanced online help files and the PC PRO Advanced CENTRON Device User
60. dA ed 51 Previous Demand civic A AA dd 51 Projected Demand iii in 52 Peak Demand Maximum Demand 0nccccccccononiconocananocononnnnannc nano ee ene re eter eee rere eee eee 52 Coincident Demand 5 2 mir s Lot gp e Later p dd dt 52 M ltiple Peaks 1 ide pete dp aida dh 52 De mandi Reset eid etl earned et dee abate ile T dee ad eee Ead 52 Gold Load Pick p i iiit dti Ed rete iia eL egeta vd 53 TOU Load Profile Meters namining aieeaa ee entente trennen nnn snnt nene 53 Self Reading and SnapShot Registers au aaa aaa aaa nanen ee eee ee vetes eee ee eee ee zere nete nennen 53 dine 54 TOU S hed les 5 oen ete d tede nett eate en evens 54 Calendar Schedule stat eter tiie rte tee 55 AOS Si o o dedo vale at iia ci 56 TOLKOP ra lon gati ettet nde ato dete oed 56 Load Profile Specifications neei iniiai eet tee Leo etre iras 57 A ye rte tes teal ka tet cat eh al at el a Melt ote aad A Ate 57 BF RESOUNO iiis e eie ic old gentle enden e a e enn dy ome ne nike 57 Interval Lengths cio tt e Er 58 Power OUtage inte bei En Peu ite iere hause 58 Gharnnel Gonfiguratlons ettet tr d dere 58 Data Storage idea O 59 Recording Duration sssesssssssssssssesesee ener vene ee teren eee eee 60 A 60 Event EE 60 VA SN 61 Firmware Upgrades aaa ah aaa aaa an ee eee ever eve rene ee terre verte ee nete eee te ete tee terrenet rei 62 Odes NS 62 Applying POWEF kahun aaa enen sene eee eee e eee s
61. data Save the original packing materials Battery The CENTRON C12 19 CISD Clock CIST and CISL timekeeping modules contain a battery that powers the clock circuit during a power outage The battery is permanently soldered to the module and is expected to last the life of the module The product you have purchased contains a recyclable lithium battery circuit boards and switches At the end of its useful life under various state and local laws it may be illegal to dispose of this battery into the municipal waste stream Check with your local area solid waste officials for details about recycling options or proper disposal Storage Store the meter in a clean dry Relative Humidity 50 environment between 40 C to 485 C 40 F to 4185 F Avoid prolonged storage more than one year at temperatures above 170 C 158 F Store the meter in the original packing material The lithium battery has a shelf life of approximately 15 years CENTRONO Meter Technical Reference Guide 11 Installation Unpacking As with all precision electronic instruments the meter should be handled with care in an outdoor environment Follow these precautions when handling the meter Avoid damaging the meter base cover reset mechanism if supplied and optical connector if supplied When handling personality modules grip the circuit board by its edges Do not touch the liquid crystal display Selecting a Site The m
62. dentification ID code numbers are selected during the programming process Detailed information on these display items can be found in the PC PRO Advanced documentation Energy Data Display Items Energy Data Display Item Display Made omal Atomet Test __ Demand Data Display Items Demand Data Display Item DispiayiMode Normal Alternate Test W Delivered Max Present Previous Projected Cumulative Continuous Cumulative W Received Max Present Previous Projected Cumulative Continuous Cumulative W Net Max Present Previous Projected Cumulative Continuous Cumulative W Uni directional Max Present Previous Projected Cumulative Continuous Cumulative Informational Data Display Items E E Display Mode Informational Data Display Item Normal Alternate Calibration Date amp Calibration Time MESS ANO UE MEME Cold Load Pickup Outage Time x x CENTRONS Meter Technical Reference Guide 47 Operation C12 19 C1SD C1ST and C1SL Versions Current Date Day amp Current Time E NE Days Sice Demand ese f e i omamassa f X bwmonTme AA xXx Xx Xx x x lt x lt x lt Dmweenwam e X ost Ouage Dave 8 tatouage me X X ast Program Dare Las Pega me X X an est De Lan ese ime X X aset Dt Li ere X X Load Profile Pulse Weight 1 8 Load Research ID SES IE S m xXx Xx Xx xx Xx Xx x x
63. description and the operational characteristics of the C1SC Cellnet personality module CENTRONO Meter Technical Reference Guide 1 General Information Operation C12 19 Provides detailed information and theoretical operation for C1SD C1ST C1SL Demand C1SD Time of Use C1ST and Load Profile C1SL versions Gives step by step procedures for accessing the three operational modes and associated displays Testing Provides an explanation of the testing troubleshooting Troubleshooting and maintenance of the CENTRON meter and Maintenance Specification Numbers Provides a reference to meter part numbers and shows and Drawings meter form drawings General Description The CENTRON meter is a solid state singlephase and network meter used for measuring electrical energy consumption The CENTRON incorporates a two piece design combining a base metrology with a variety of personality modules that snap on the standard meter base Utilizing the Hall Effect technology for accurate power measurement the metrology portion of the meter contains all measurement circuitry and calibration information while the personality modules contain the register functionality and communication mediums Each version of the meter is distinguished by the various personality modules that mount to the standard meter metrology base The personality modules available include the following versions Energy only C1S LCD Demand CISD Time o
64. detected a problem vvith the operating system If this error occurs Factory Reset the meter reprogram the meter and check for proper operation If the error continues to exist return the meter for repair If the meter detects this problem return the meter for repair If this error occurs Factory Reset the meter reprogram the meter and check for proper operation If the error continues to exist return the meter for repair If the meter detects this problem return the meter for repair The billing data has been corrupted Factory Reset the meter reprogram the meter and check for proper operation including several power cycles If the error continues to exist return the meter for repair If the meter detects this problem return the meter for repair If the meter detects this problem return the meter for repair CENTRONO Meter Technical Reference Guide 73 Testing Troubleshooting and Maintenance Non Fatal Errors Non fatal errors can be programmed to scroll during the one second display off time or lock on the meter display If multiple non fatal errors occur the meter will display a combined error message For example if a Low Battery error and a Time of Use error exist the error display will read Err 1 3 In this case if one of the errors had been programmed to lock and the other error had been programmed to scroll the display will lock on the combined error message Selecting a
65. displayed data and three icons to represent a vvatt disk emulator The display may be configured for either four or five digits and will roll over at 100 000 kWh This module is compatible with the ZRO C2A Resetter d Figure 20 LCD 24 CENTRONO Meter Technical Reference Guide Operation C1S Version Non Detented Register The Non Detented Register displays the delivered energy plus received energy Figure 21 Non Detented Register Detented Register The Detented Register addresses applications requiring the reading of delivered kWh only Received energy is discarded Figure 22 Delivered kWh with Detent Enabled Net Register The Net KWh Register addresses applications requiring residential net metering points Net kWh is the delivered kWh to the customer minus any received kWh from the customer Net metering emulates a non detented J5 meter Figure 23 Net kWh CENTRONO Meter Technical Reference Guide 25 Operation C1S Version Segment Check The Segment Check Register addresses applications requiring display scrolling between kWh and a full segment check See Display Timing for factory programming options Figure 24 Segment Check Although the DEL and REC indicators are ON during segment check they are not currently used Factory Programming Options Display Timing The display will scroll between the billing register and the segment check mode based on the factory programming option
66. e 15 Hall Cells and ADCS 20 CENTRONO Meter Technical Reference Guide CHAPTER 4 Operation C1S Version In This Chapter Physical Description Personality Modules eee 22 REIS cm T 22 LCD Display FOO etario ordei celur sero iere kon krh 24 Non Detented Register cuina Ke de vesht rt 25 Detented Repita dae 25 Net Register m 25 Segment Check iii 26 Factory Programming Options essent enne ener 26 The kWh only version of the CENTRON meter is available with an LCD personality module to register energy accumulation YPECIS 30TA 1 0Kh NFO28495919 28 495 919 Hr n Figure 16 C1S LCD Personality Module The LCD module may be ordered with a 5x1 or 4x10 register for self contained meters and a 5x TR or 4xTR register for transformer rated meters The kWh only version of the CENTRON not only provides very accurate measurement for energy accumulation for today s needs but also provides a platform for easy upgrade to higher functionality in the future CENTRONO Meter Technical Reference Guide 21 Operation C1S Version Physical Description Personality Modules The CENTRON Personality Modules snap into the meter register mounting brackets to ease installation of the board The LCD module is connected to the metrology board using the board to board connector The following information is sent to the LCD module from the metrology board
67. e circuit board which maintains the clock circuitry during a power outage Optical Port Communication The optical port is a communication interface from the meter to a PC Communication through the optical port may be from 9600 default to 28 800 baud Self Read Capability Billing data can be stored automatically at programmable times to be read later All meters are equipped with two self read snapshot registers however meters with timekeeping functionality are allotted up to twelve self read registers Load Profile The C1SL module provides 144K RAM for up to eight channels of load profile interval data Expansion Capability An expansion port is available for future functionality except non RF versions Bidirectional Metering All three multifunction versions are capable of measuring and displaying forward and reverse energy only KWh These modules have four registers The modules are capable of measuring four types of energy delivered received net and uni directional The C12 19 C1SD T L modules are available with an LCD display and a polycarbonate cover The cover contains the optical port adapter and demand reset button Type Codes The type code indicates the metrology version base functionality and RF options in the meter The type code is found on the nameplate of the meter The following is a depiction of how type codes are displayed for the C12 19 D T L meter Metrology Ver Functio
68. ed with LCDs the watt disk emulator shows the direction of energy flow The emulator will scroll left to right for positive line to load energy flow and right to left for negative energy flow The CIS and CISR are equipped with LCD displays that utilize a three square segment annunciator to show the direction of energy flow The annunciator represents 1 0 watthour each time it turns on and 1 0 watthour each time it turns off Once all three segments have turned on off the watt disk emulator produces a Kh of 6 0 The C12 19 CISD T L meters utilize a watt disk annunciator in which the Kh value of the single segments of the watt disk emulator is equivalent to the value of the Kh of the LED As a result a full revolution of the watt disk emulator produces a Kh of 6 0 CENTRONO Meter Technical Reference Guide 69 Testing Troubleshooting and Maintenance TOU Rate Annunciators The CENTRON meter is equipped with five Time of Use annunciators on the LCD Located on the right side of the display the annunciator A B C D or t flashes when the applicable rate is active and is enabled to display their respective values Available on the CIST and CISL Figure 36 TOU Rate Annunciator Test Mode Annunciator The CENTRON meter is equipped with a Test Mode LCD annunciator located in the right portion of the display This annunciator is enabled when Test Mode is activated The word TEST appears on the display and flashes at a steady rate w
69. eference Guide 71 Testing Troubleshooting and Maintenance Required Hardware The typical field test setup consists of a phantom load portable standard and an infrared test pulse adapter with a counter or snap switch assembly CENTRON meters purchased without a test link will require a more sophisticated loading circuit Test Method Using a Snap Switch Assembly To conduct the test the technician observes the position of the load emulation annunciator and simultaneously starts the standard through the snap switch After observing a predetermined number of emulated disk rotations the technician stops the standard with the snap switch A comparison is then made between the predetermined number of emulated disk rotations and equivalent disk rotations indicated on the watthour standard Troubleshooting Fatal Errors The CENTRON meter will check for fatal errors when a meter reconfigure is performed when power is initially energized and upon future power restoration while performing key operations Error Codes C1SR Effect Indication Unsuccesstul writing to All metering and RF The LCD will display the or reading from functions are halted word Error in the area EEPROM memory Return the module to normally used for energy the factory for repair accumulation Metrology error All metering and RF The LCD will display the functions are halted word Error in the area Return the meter and normally used for energy module to
70. emand Peak Demand is the largest demand value that has occurred during any demand interval since the last demand reset At the end of a demand interval the present demand is compared with the current maximum demand register If the present demand is greater it is transferred to the maximum demand The maximum demand is reset to zero on a demand reset The date and time of the maximum demand are also recorded Maximum demand is used for block rolling and thermal demand types Coincident Demand Coincident Demand is the energy demand required by a given customer or class of customers during a particular time period Coincident peak demand is the energy demand by that group during periods of peak system demand A customer s coincident peak demand is usually calculated from meter readings taken at the time when the customer s demand is likely to be highest An energy provider may be more concerned with demand at a given time when total customer demand is highest than they are with the peak demand of a given customer during other times Multiple Peaks The CENTRON meter can measure the top five maximum demands for the quantities selected The possible quantities include W d W r W net and W uni Demand Reset A demand reset can occur in both Normal and Alternate modes A demand reset can occur in four ways 1 Through the optical port using a compatible programming device 2 With the standard push button demand reset switch located on the
71. en nennen rr nn 41 Figure 33 Controls and Indicators eene nennen enne 43 Figure 34 Test LED Location au aaa aaa eee nese nene eee ee eee ee sene eee eee tree eter eee nr 68 Figure 35 Pulse Detector una aa aaa aaa anen sene esen ee eee reve esse tere entente ner ever ee ee nnns ettet rens sns eee nnns 69 Figure 36 TOU Rate AN NUN CI ALO uu aaa anen e eee eee esen eee ner ee tree etike ever ee rr 70 Figure 37 Form 1S Wiring Diagram sana aaa aaa aaa aaa ea eee vene sene e e enen ee erret eren tree entet treve eee renie 79 Figure 38 Form 2S Wiring Diagram sauna aaa ananas e anes eee e sene e eee ee teres eter eee tete eee eee teket eee 80 Figure 39 Form 3S 120V Wiring Diagram na uua ananas eee even ee eres eter esen eee eee rre vere eee 80 Figure 40 Form 3S 240 V Wiring Diagram na uua aaa ananas eee enen ee teres eterin rete eee ente reve enen 81 Figure 41 Form 4S Wiring Diagram sana aaa aaa nana ane ee eee ever e eee ee tree verte ente ee nennen nn 81 Figure 42 Form 12S Wiring Diagram sess enne enn 82 Figure 43 Form 25S Wiring Diagram ssssssssssessseseeeee eene nennen nnns 82 CENTRONO Meter Technical Reference Guide ix Table of Figures Notes X CENTRONO Meter Technical Reference Guide CHAPTER 1 General Information In This Chapter About This Mandale ita eee ee ca e ele dera Lapide arp aetas 1 General Description io 2 Physical D SETIPLOR sitiado a 3 Product Available
72. ene zene ee ee teze terre veres eee ee eee eee enen 62 Power Down Procedures aa u aaa aaa ananas eee nn eee ee zere ever ee ee nete zere ete nsns nnne 62 Battery Life Load Profile amp TOU 63 Three Button ROSE tua anon aaa aaa sene neve eee eee seen ee eee eee enne enn snnt entrent resins sett enne 63 RE DIOS se IE IA 64 Testing Troubleshooting and Maintenance sene eee nonen eee ee 67 Testing Support Features eie cerni bete eter Pe Rte ic eer e t et Rb icc ond e tcn 68 Infrared Test LED se 68 AI o 68 AnnUuriclatOrs curia cadthane de deo ek nad aeu na en Shtate sduhet en ve siii anda 69 Watthour Annurnclators 2 B teneret teret ate tore c dr e rs iii dd 69 TOU Rate Ann UN CIAtOI Sn sna rinii ene es enen e sene es eee re eter eee ee ee tree entente rents 70 CENTRONO Meter Technical Reference Guide vii Table of Contents SMS 70 Testing with the Infrared Test LE Da aa a u aa aha ananas nane eee ee veres sene re eee re eter re ver ee nnne 70 Testing Using the Disk Emulation Annunciator ssssss eene 71 Recommended Energy Testing Procedures sse 71 AEP Test Codes x die eR ete cats nated a QU ee DE YE Eae NS No ee dee bee ean 71 Field T6Stllg s tom soot da o ceci So EE et 71 Required Hardware ertet be ee Ea Ca pte ah dd 72 Test Method Using a Snap Switch Assemb
73. eter is designed and manufactured to be installed in an outdoor environment at operating temperature ranges between 40 C and 185 C 40 F to 4185 F Operation in moderate temperatures increases reliability and product life When using a Demand TOU or Load Profile meter where the line frequency is not stable Itron recommends using either the CIST or CISL meter version with Crystal Time synchronization if a clock is needed TOU or Load Profile Installing the Meter into Service Install the meter base using standard meter installation practices The current and potential terminals extend as blades or bayonets from the back of the meter The meter is plugged into the socket so that the bayonets engage the main socket jaws that connect to the service lines Clamping pressure on the bayonets is provided by the heavy spring pressure of the socket jaws In some heavy duty sockets jaw clamping pressure is provided by a handle or wrench On meters equipped with LCD displays verify register operations by observing the display LCD displays the correct number of digits 4 or 5 If the test mode annunciator is flashing depress the Test mode button to return the meter to the Normal mode CIS D T L only Ifthe register only displays a segment test all items shown and flashes CNTRON nordiSP or 3BReset then the register is not programmed Verify that no errors are displayed 12 CENTRONO Meter Technical Referen
74. f Use TOU with Demand C1ST Load Profile with TOU and Demand C1SL Energy only with radio frequency AMR CISR Cellnet Fixed Network C1SC Energy plus demand with radio frequency AMR CISDR2 R3 CENTRONO Meter Technical Reference Guide General Information A M X N 612191 fi 3 Ad No Figure 1 CENTRON Personality Modules Physical Description The CENTRON meter features a common meter base to which various personality modules are attached The covers come in configurations of polycarbonate and glass Meter Base The CENTRON meter base contains all of the measurement circuitry and calibration information on the metrology board The meter base assembly includes two current conductors a flux directing core a Hall Effect device the metrology circuit board and the ultrasonically welded module support The base also contains a metal oxide varistor MOV which is used to protect the meter from line surges CENTRONO Meter Technical Reference Guide 3 General Information Meter bases are built specific to the metering form and are available in Form 1S 2S CL200 2S CL320 3S 120V 3S 240V 4S and 12 258 configurations Examples are shown below Figure 2 CENTRON 120 Volt Metrology Figure 3 CENTRON 240 Volt Metrology Figure 4 CENTRON 20 Amp Metrology Personality Modules All of the personality modules in the CENTRON meter family snap into the module holder located on the s
75. gisters If the previous demand is greater than the value in the corresponding peak demand register the lower value the maximum demand recorded so far is replaced If the previous demand is less than the value in the corresponding peak demand register the maximum demand value remains unchanged This update process is carried out when a demand interval is completed when a power outage occurs when Test Mode is initiated or when a Real Time Rate change occurs The CENTRON meter demand calculations are performed using one of three possible methods block rolling or thermal emulation The demand method is selected when the register is programmed Demand Calculation of demand is always based on rolling or block intervals Demand calculations use three constants the watthour constant Kh the demand interval length and the register multiplier The weight of an incoming pulse is determined according to the following formula kW Pulse Weight Kh 1 1000 x Register Multiplier x 60 7 Demand Interval Length Pulse The demand in a given interval is the product of the number of pulses received during that interval times the pulse weight Demand kW Number of Pulses x kW Pulse Weight The Demand value is continuously compared against the stored maximum value If a demand value is greater than the corresponding maximum demand it is saved as the new maximum demand If the demand value is less than the corresponding maximum demand it
76. hen test mode is activated Available on the C12 19 CISD CIST and CISL Testing with the Infrared Test LED The CENTRON meter is equipped with an Infrared Test LED Light Emitting Diode which is located on the top of the meter at the 12 o clock position The pulse weight represented by the LED pulses is always 1 0 watt hour per pulse Since the Kh value for the meter is 1 0 make sure the test board is programmed to accept this Kh value tt OF PULSES REQUIRED ON TEST BOARDS 120V 38 1S amp 25 CL200 240V 38 m pum Z 240V 4S Full Load 15 Light Load 10 6 7 Povver Factor 10 7 12 1 pulse 1 Watt hour as compared to 1 pulse 7 2 Watt hours in Electromechanical meters To obtain test uncertainties of 0 0196 plus the uncertainties of the test equipment use a minimum of 30 pulses With a constant load applied real or phantom the LED pulses are compared to the output of a high accuracy watthour standard This is accomplished using a compatible optical pickup and a comparator 70 CENTRONO Meter Technical Reference Guide Testing Troubleshooting and Maintenance Follow these steps to test the Wh LED 1 Apply a constant delivered watts load Wapp to the meter 2 Verify that the LED pulses properly either by counting the pulses or using a comparator to compare the pulses from the meter under test to the standard To determine the number of pulses per second use the following equation Ihr xaKh
77. i eiii ai i iia i 20 Figure 16 CIS LCD Personality Module ua uaa aaa aaa nana ana es vene ene ee zones veres ente ee zene eee res eee eee eren 21 Figure 17 Mounted C12 19 D T L Register aaa u anha anne enen ee zere s eee esse nn nn zene ee terre e ran cnn 22 Figure 18 ZRO C2A Resetter Connected to the CENTRON ao a uha aaa aaa nane ee venes v ereza reze 23 Figure 19 Reverse Side of ZRO C2A RESette 1 au uu aaa aaa anen vene eve e sehir e eee eee terrene eren 24 aeu 24 Figure 21 Non Detented Register esa ene venes enen esen ee eee reve eene tenen nnns nnns 25 Figure 22 Delivered kWh with Detent Enabled ssssseeeseeeneen nens 25 Figure 237 Net KW stir ente e ee re et ees t eet ta t vesit er s 25 Figure 24 Segment Check unu detis needs da eet rt 26 Figure 25 CENTRON C1SR Meter aa 00 000 aaa aa an enen esen seen e vere tere zere zere ee eee er eter tere vere eee eee eee 27 Figure 20 G1 SRLGD uicit ette e zh eet e ect edt ett tr 29 Figure 27 CISR FCC Label Location aa aaa nanen nenes sene ne sete ee eter ever ee entrent ennt nnns nnns 34 Figure 28 CENTRON Cl O Oar e ana nana nanen enen cnc cnn 35 Figure 29 Gellnet Telemoeltry c ride Dee teer tme ate err 37 Figure 30 CISC LED ici dd aded er kinases Lat 38 Figure 31 C1SC CN1SC Programming Port Location seesseeeennnenes 39 Figure 32 CENTRON C1SL Meter ssssssssssssse esent nennen nett
78. ich a power outage occurs greater than the minimum time programmed in software Time Adjust Forward The status bit is set for time adjust during the time interval Time Adjust Backward The status bit is set for time adjust backward during the interval Li Refer to PC PRO Advanced online help for a list of Load Profile Status Codes In addition to the interval profile data and the interval status data each block contains a time tag specifying the month day hour and second of the end of the data block CENTRONO Meter Technical Reference Guide 59 Operation C12 19 C1SD C1ST and C1SL Versions Recording Duration Use the following equation to determine the recording duration for the load profile register Duration days M I 1024 1440 2 C 2 6 C 4 128 Mz Memory size in kilobytes C Number of channels I Interval Length in minutes Recording Duration in days for 144 Kbyte load profile memory size Number of Interval Length Minutes Channels 15 20 30 60 so so Optional Features Event Log The C12 19 C1SD T L register has an Event Log that records historical events that have taken place in the meter The events to be logged must be configured via the PC PRO Advanced programming software To aid in troubleshooting Itron recommends enabling all events to be logged In order to have date and time associated with an event Time of Use or Load Profile is
79. iers ssssessseeseen sene ee eee eee tete sete ee nre 26 Operation CIS Vers cc 27 Standard Consumption Message SCM uu aaanaaaa nana anen even ee veres eee re eter esen ee enen ee terre veres enet 28 Interval Data Message IDM aa uu uuuaa aaa aaa aaa nese eee eee ese eee e zene ee entente eee terre eee kidaan 28 Physical Description CS fusta tcrtio cen Mer dherat ath t 28 GSH DISPIQYEs Bre gtda 29 G1 SR Electronic Detention E eee tele drone 30 Net Met n geta H 30 Resetting Values C1SR tec ohh kd ni 31 Bh 31 FCC Regulation St scores eret cet abe te he et ictus 31 Testing the RF Message i ie nieder ieget ate te qn or xen ic cae ese tc eel em tectus 31 Tamper Detection ect eee be aate c cete oe ic ciet t xac te s 32 Testing the C1SR Tamper Counter aaa aaa ananas eee seen ee eee re eee ee sene esse ener enne 32 SOM TOSUNG EIL capdar 32 Retrofitting the CISR Personality Module sse eee eee 33 Operation C1SC VS IOM ass aha aii 35 Physical Description iot nite diet dvd iit e 36 Transmission Scheme iea e a p en ee 36 EG C RegtulatiOns ito ee ee Do CER ug eee quee Ut e Pe apte ep e 37 Display FUNGUONS EpL 37 Resetting Values ac cals ind ug ede Ut e en ee 38 Programming the Ci SGJON 1 SO au ana aaa nana anes eee neve eseve ee veres essen einen sene re see neveri eee eee ete 38
80. ine voltage Reference voltage Energy flow direction Energy pulse data Line frequency A connector is located at the 12 o clock position behind the LCD for resetting the energy register This is done using the ZRO C2A Resetter Figure 17 Mounted C12 19 D T L Register Registers Kilowatt Hours The modules display energy in increments of whole values of kWh Standard operation for all modules is to add forward and reverse energy flow thus providing uni directional operation This feature is factory programmable and will only measure delivered energy At the time of order the energy only module can be selected to have a detent register Programmed at the factory this feature will cease registration while the meter is inverted or power flow is otherwise reversed The module can also be selected to have a net register This feature is factory programmable and will measure delivered minus received energy 22 CENTRONO Meter Technical Reference Guide Operation C1S Version Resetting Values ZRO C2A The ZRO C2A resets the energy register through a direct connection to the connector at the 12 o clock position on the LCD and R300 modules henna eee k n Figure 18 ZRO C2A Resetter Connected to the CENTRON The ZRO C2A is a pocket sized handheld device for resetting the electronic meter readings in the CENTRON LCD kWh meter C1S and the R300 meter CISR The ZRO C2A also resets the tamper indicators in the
81. ll automatically exit after a user configurable Mode Timeout A programmable timeout length from 1 to 255 minutes is available See the PC PRO Advanced online help for more information on configuring the Mode Timeout This action prevents someone from accidentally leaving a meter in Test Mode and losing billing data Test Mode Lockout Activating Test Mode Lockout via the programming software will prevent entry into Test Mode via manual Test Mode Switch activation Displays The CENTRON meter features a versatile ANSI C12 10 compliant 104 segment liquid crystal display LCD A nine digit LCD with a variety of annunciators is provided on these multifunction personality modules AT ILILILI TS 80800 229 NAI o 120240277480 VAVeVc CCUMPFMKWWARh CENTRONO Meter Technical Reference Guide 45 Operation C12 19 C1SD C1ST and C1SL Versions 888 888888 EOI VA VB VC 120 240 277 480 Scr Loc SEL nor SEL Alt nor diSP TEST amp appear for segment check Static Indicators Description Nine digits 7 segments each for display of alphanumeric information End of Interval Registers Dmd Indicators for phase voltage not applicable in CENTRON C12 19 meters are present during segment check Watt Disk Emulator scrolls right for positive scrolls left for negative Nominal Voltage Indicator not applicable in CENTRON C12 19 meters are present during segment check Scroll Lo
82. ly sssssssssseeeeeene 72 Troubleshiootirig e toti tei S hoa tano doe IRE roa ee needs 72 Fatal EMOS 3 discrete en eee e E seas 72 Error cod s OS bl ut ea tata de bets orate dou e E 72 Error Codes C12 19 C1SD T L sse nennen 72 Norm Fatal EMOS tis eee ete tee lanae bake Ra betae uas ibas e eaae ARR h n hr 74 Inspecting and Troubleshooting General sse nnne 76 Blank Display iii se he eae ei e E espe dua ht eere o Eee LEDs 76 Time and Date Wrong TOU Version ssssssssssseses eene nennen 76 No Accumulation of kWh or KW ssssssssssseseseeee nennen enne enne tere 76 Software Cannot Communicate with MOQUIO ua aaa aaa aaa an ane e even ever ee zere veren eee 77 Reed Switch Does Not Activate the Alternate Mode uu una aaa aha aaa an anen even ever nenen 77 Reset Mechanism Does Not Initiate Demand Reset ua aaa aaa an nana nn even esen reze reze 78 Demand Reset Cannot Be Initiated Through PC or Handheld nane eee 78 Test Mode Switch Does Not Place Meter in Test Mode ssssssseseeee 78 Inspecting and Troubleshooting C1S LCD and C1SR sssssssssseeeeen 78 Blank DISDIay scho rit ees tette ted ente tat eto tette ets 78 Specifications and DrAVVINGS nana nana anen anen eee nenen eee eee eee eee nonen e see tentene nen nnne nnn 79 SpecificalO E 79 DANNS RETE 79 Glossary OF
83. mand Reset plunger is not in the retracted position before turning the outer cover the mechanism may be damaged 16 CENTRONO Meter Technical Reference Guide CHAPTER 3 Operation Base Metrology In This Chapter CENTRON 15 2S CL200 and 3S enne 17 CENTRON 25 CL320 485 12 258 vince ii ime rte k dushi res tree etn 19 CENTRON 18S 2S CL200 and 3S The CENTRON meter is a solid state meter which uses the inherent multiplication properties of the Hall Effect to measure power The Hall Effect principle relies on a physical property a conductor which carries a current in a magnetic field generates a voltage difference across the conductor proportional to the product of the current and the magnetic field The voltage V created at the output of the Hall device Von Ki X B Where iis the biasing current derived from the line voltage B is the magnetic field density derived from the line current K is the Hall coefficient analogous to a gain factor in any meter K could be viewed as the Hall sensor intrinsic gain and is maximized by the appropriate choice of semiconductor materials that have been uniquely optimized by Itron for the CENTRON meter For the metering application the biasing current i applied to the sensor is generated from the line voltage V using a resistor R i ZV R The magnetic field B is generated by the line currents J 11 12 that flow through two conductors looped around the core B
84. nality RF Option C Singlephase 1 Version Socket D Demand R2 2 ERT CN Network T TOU R3 3 ERT L Load Profile The example above is a type code for a C12 19 TOU meter with RF capability transmitting 2 ERTs 42 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions Controls and Indicators All controls and indicators are shown below For detailed instructions about a feature or control refer to the appropriate subsection Figure 33 Controls and Indicators Liquid Crystal Display LCD Magnetic Switch Demand Reset Button Test Mode Button Optical Port Infrared Test LED 900006000 Nameplate CENTRONO Meter Technical Reference Guide 43 Operation C12 19 C1SD C1ST and C1SL Versions Modes of Operations When the C12 19 CISD T L modules are powered they automatically enter the normal display mode perform self diagnostics and display any appropriate error codes If no error codes are detected an unprogrammed module will flash nordiSP followed by Segment Test A programmed module will scroll through the Normal display sequence displaying each selected quantity annunciator and code number for the programmed duration The C12 19 CISD T L modules each have three modes of operation Normal Alternate Test Each display mode has a separate list of items quantities in which it can display The modules can display a maximum of 80 items total for the
85. nd reset Meters with timekeeping functionality can store up to twelve self reads when a self read is performed The first four self read registers are displayable in the Normal and Alternate mode The remaining 8 self read registers are viewable in the PC PRO Advanced software CENTRONO Meter Technical Reference Guide 53 Operation C12 19 C1SD C1ST and C1SL Versions A self read is programmed to initiate when any of the following occur Before each self read is taken Before each scheduled demand reset Each manual reset using the Demand Reset button on the meter A Self Read Register is programmed to initiate in one of three ways Read on manual or electronic demand reset When a demand reset is initiated all energy and maximum demand quantities are immediately transferred to non volatile memory Read on a programmed day of the month meters with timekeeping functionality only A specified date 1st 28th can be programmed into the meter to indicate the exact day that a self read is to be performed On this date register readings are transferred to nonvolatile memory If desired an automatic demand reset can be performed after this self read Read on a programmable number of days since the last manual or automatic demand reset meters with timekeeping functionality only If the selected number of days 1 to 255 passes without a demand reset a self read is initiated If desired an automatic demand reset can
86. ng Fatal and Non fatal errors Maintenance CENTRONO Meter Technical Reference Guide Testing Troubleshooting and Maintenance Testing Support Features Infrared Test LED The CENTRON meter is equipped with an Infrared Test Light Emitting Diode LED in the figure below where each pulse represents a fixed value of watthour measurement The LED is located on the top of the meter as the meter is viewed from a typical installation The pulse weight represented by the LED pulses is 1 0 watthour per pulse Kh 1 0 Figure 34 Test LED Location Pulse Detector An optional pulse detector is available for the CENTRON meter The pulse detector has an infrared pickup with two visible LEDs When positioned over the CENTRON light pipe as shown in the figure below it will produce a visible flash when an infrared pulse is received from the metrology The right LED will flash once for each infrared Wh pulse while the left LED will flash once for every 10Wh infrared pulses received The left LED on the pulse detector is helpful when heavier loads are present on the system being examined This can be used to verify that the metrology is measuring energy when installed and to conduct timing tests to determine the amount of load on meter 68 CENTRONO Meter Technical Reference Guide Testing Troubleshooting and Maintenance tiren CHF Figure 35 Pulse Detector Annunciators Watthour Annunciators The CENTRON meters equipp
87. ng meter commissioning to verify that the meter is transmitting when first installed 1 Place the meter in a socket 2 Ensure that the meter has less than 50 watt hours of accumulated energy you may use the ZRO C2A resetter to reset the energy Q If the meter has more than 50 watt hours of accumulated energy consumption to 0 Apply power to the meter Read the meter using a hand held device or other RF capable reading device The meter will continue to transmit multiple RF messages while under the 50 watt hour threshold CENTRONO Meter Technical Reference Guide 31 Operation C1SR Version Tamper Detection The CENTRON CISR features the Itron patented method of tamper detection that senses both meter removal and meter inversion The removal tamper RTPR increments a counter each time the meter is abruptly removed from a live meter socket The tamper counter utilizes a tilt switch to detect when the meter is removed from a meter socket The inversion tamper ITPR increments a separate counter each time the meter senses reverse power flow caused by meter inversion The metrology board senses reverse power flow and sends this status to the CISR module Although the CISR increments an inversion counter when reverse power flow is detected the meter when undetented will still accumulate the energy consumption in the positive direction Each of these tamper indications along with the kWh consumption is then transmitted through the
88. nual for more detailed directions Wrong Line Frequency Verify proper line frequency is selected in setup routine in programming software Select proper frequency and reconfigure meter Battery Failure During Power Outage Verify battery voltage Replace module Daylight Savings Time Not Programmed Correctly Verify DST is selected in program Reconfigure meter with correct program Component Failure Return meter for repair No Accumulation of kWh or kW Cause Solution Demand Delay Selected kW will not immediately accumulate after a power outage if CLPU Demand Delay has been selected Accumulation will begin immediately after Demand Delay has expired Verify register program and reconfigure meter Module was left in Test mode Accumulation of kW or kWh will not take place while register is in Test mode Exit Test mode and verify proper accumulation begins Module Not Receiving Pulses Verify that meter is accumulating energy by testing infrared test LED 76 CENTRONO Meter Technical Reference Guide incorrectly Component Failure Cause Time of Use Schedule programmed Testing Troubleshooting and Maintenance Solution Verify TOU schedule contains continuous 24 hour periods for all weekdays weekends or holidays All 24 hour periods throughout every year must be accounted for within the TOU schedule Replace module Software Cannot Communicate with Module Cause Failure Ele
89. ods within the demand interval The registered demand reading will be less than the actual maximum demand of the load To counter this situation the concept of rolling demand was introduced Rolling demand is calculated as follows 1 For illustration purposes assume a 15 minute billing demand interval with three five minute subintervals has been selected Then at any given moment the meter has three complete sets of five minute information available for demand calculations 2 Atthe end of the present five minute subinterval the information on the oldest five minute subinterval is discarded and demand calculations are performed on the three newest sets of subintervals 3 If the billing demand interval is 30 minutes with five minute subintervals then six sets of five minute information or updates will be used for calculating previous demand Thermal Emulation The CENTRON meter will emulate the response of a thermal demand meter This type of demand calculation is approximated exponentially The meter will record 9046 of a change in load in 15 minutes 99 in 30 minutes and 99 9 in 45 minutes The four characteristics of a thermal demand meter that the CENTRON meter will emulate are Arithmetic phase summation Continuous rolling average demand Response calibrated to RMS values No End of Interval EOT 50 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions The following qu
90. ogramming Port Location CENTRONS Meter Technical Reference Guide 39 Operation C1SC Version Notes 40 CENTRONO Meter Technical Reference Guide CHAPTER 7 Operation C12 19 C1SD C1ST and C1SL Versions In This Chapter F atures 1t ete e m A et A o A I dho 42 Type Codes aiii kreva tu red ha tS ome b em aeg e As ii 42 Controls and Indicators esee roaa trennen 43 Modes of Operations ae e ce e esq et A pd REOS rede 44 Displ yS etta e i e oai ee fe e e GU DER AT RR IE de ede 45 Optical Ports ane ne ei Are ewe ne OP IE RI ERE tebe 47 Programmable FUNCTIONS aaa aaa aa aaa nana nana nanen enes ene eee eee zere rete rete tete enne 47 The CENTRON meter is available with interchangeable personality modules that snap into the standard CENTRON metrology base The three multifunction modules available include the following versions CISD a Demand module CIST a Time of Use TOU module with Demand CISL a Load Profile module with TOU and Demand Figure 32 CENTRON CISL Meter These personality modules utilize the ANSI C12 19 and PSEM protocols CENTRONO Meter Technical Reference Guide 41 Operation C12 19 C1SD C1ST and C1SL Versions Features Features of these multifunction modules include Non Volatile Memory Programming register and load profile data are stored in the EEPROM during a power outage Meters with timekeeping functionality contain a battery soldered to th
91. p that can only be erased by an electrical signal retains data during a power outage Battery Carryover The amount of time that the register is energized by the battery to maintain the accuracy of the clock within the microprocessor All program and billing data are transferred to non volatile memory when battery carryover operation is activated Baud Unit of data transmission signalling speed roughly analogous to bits per second bps Block Interval Demand Demand based on intervals from 1 to 60 minutes in length Calendar Schedule Schedule that determines seasonal changes Daylight Saving Time DST changes holidays daily switch points etc Coincident Demand The energy accumulated in an interval where a second trigger energy attained a peak For example Var demand when Watt demand attained a peak Cold Load Pickup CLPU See Demand Delay Continuous Cumulative Demand The sum of the previous billing period maximum demands and the present period maximum demand CT Ratio The current transformer ratio to use for viewing current amperage quantities for this service point Cumulative Demand The sum of the maximum demand values at each demand reset since the cumulative register was cleared It is updated at each demand reset by adding the maximum demand register to the cumulative register Current Season The season that defines the present rate schedule Daylight Saving Time DST Daylight Sa
92. pplications nos nmi I4 i ET 8 CLO 476 LLL aui in xy BE Figure 25 CENTRON CISR Meter The table below describes the various R300 versions available on the CISR SCM ERT Type IDM ERT Type 04 N A One ERT register without IDM CENTRONO Meter Technical Reference Guide 27 Operation C1SR Version Standard Consumption Message SCM Utilizing the 96 bit Itron Standard Consumption Message protocol SCM the CISR provides the energy KWh consumption module ID number tamper indications meter type and error checking information in each radio frequency transmission Within the 96 bit SCM 26 bits are allocated to the module ID number for meter identification also referred to as ERT ID number As of October 15 1999 all CENTRON CISR meters utilize 26 bit identification numbers The CISR uses frequency hopping and transmits within the unlicensed 910 to 920 MHz band on an average of once per second In order to avoid interference from other devices the transmission frequencies and time interval between transmission cycles are completely random in nature The CISR is factory programmed with tuning information module ID tamper indicators ITPR and RTPR meter type energy consumption and scaling factor The program and all register information are stored in non volatile memory in the event of a power outage Upon power restoration all of the information in the non volatile memory is re
93. r attachments energy direction sign 60Hz clock signal synchronized with the line voltage for time keeping pulse that drives the stepper motor for the mechanical register attachment 1 pulse every 10 watthours The metrology board which houses the measurement components described above passes the Wh pulse energy direction and 60Hz clock signals to the personality module attached to the meter base The two line voltages one is referred to as meter ground and power supply references are also supplied for reference purposes An inherent feature built into the design of each CENTRON ensures that the calibration of the product is not affected by any electronic board existing or planned added to the meter This is achieved by a distributed power supply and documented design requirements in the CENTRON developer s kit CENTRON 2S CL320 4S 12 25S The advanced metering forms of the CENTRON 2S CL320 4S and 12 25S meter use the same Hall Effect measurement principle that is used in the form 1S 2S and 3S metering forms described earlier The major difference with these metering forms is the presence of two Hall cells magnetic cores and ADCs see the Hall Cells and ADCs figure below For these metering applications the biasing current Ibias Ibiasi and Ibias2 applied to each sensor is generated from the line voltage Vlinel and Vline2 using a resistor The magnetic field is generated by the line current ine and Iline
94. re to occur when the data is being viewed It is calculated by dividing the accumulated energy in the current interval by the time of a full interval For block demands present demand starts at zero for each interval and ramps up to the demand value at the EOI For rolling demands the energy from the oldest subinterval is discarded and the present demand is calculated using the energy in the remaining subintervals and the energy in the current subinterval At the beginning of a new subinterval it drops by the demand of the oldest subinterval and ramps up to the demand value at the next EOI Present demand is not affected by a demand reset Previous Demand Previous Demand is the demand from the most recently completed demand interval When a demand interval ends the present demand is transferred to the previous demand When using rolling demand this quantity is updated after each subinterval For thermal demand types the previous demand value is equal to the present demand CENTRONO Meter Technical Reference Guide 51 Operation C12 19 C1SD C1ST and C1SL Versions Projected Demand Projected Demand is an estimate of the demand the meter will have accumulated by the end of the current interval This value is calculated by dividing the accumulated energy by the amount of time accumulated in the interval Projected demand is calculated upon request Projected demand is available for block and rolling demand only Peak Demand Maximum D
95. refore the smallest pulse weight PW that can be used is PW Min 12 000 Wh 65 535 0 18 Wh Pulse Data Storage The C12 19 D T L Register uses non volatile flash memory to record load profile data Data is stored in load profile memory at the end of each interval Each channel has 16 bits written to load profile memory For example consider 8 channels of load profile At the end of an interval a 16 bit number is written into load profile memory for channel 1 a 16 bit number for channel 2 follows immediately and so on up to the last 16 bit number for channel 8 which follows immediately The process continues for each interval until 128 intervals one block or record have been recorded In addition to the profile data each interval contains eight types of status bits written into each data interval 1 Partial Interval The status bit is set for a partial interval due to a time adjust power outage or beginning interval Long Interval The status bit is set for a long interval due to a time adjust backwards Skipped Interval The status bit is set for a skipped interval due to a power outage Test Mode or time adjusted forward during the interval 4 Test Mode The status bit is set for Test Mode due to the meter being in test mode during the interval 5 DST The status bit is set for Daylight Savings Time DST due to DST being in effect during the interval 6 Power Outage The status bit is set for each interval during wh
96. required A Demand only register allows for event log recording however in the event of a power outage the date and time will not be reliable The C12 19 CISD T L register Event Log is circular in nature allowing for the capture of the most recent events in the meter at all times The register is capable of retaining 420 events prior to wrapping Each event log record includes an event description a time and date stamp and additional information on certain events 60 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions For meters with batteries all logged events are retained through a power outage For meters without batteries the Event Log is periodically written to non volatile memory Events that occur just prior to a power outage may be lost depending on whether they were backed up or not The contents of the event log can be viewed using the meter programming software The following events may be configured for recording in the C12 19 CISD T L register Event Log Billing Schedule Expired billing schedule has expired and needs to be updated in PC PRO Advanced Clear Billing Data billing data has been cleared upon initialization of the meter or as a secondary activity by authorized personnel Configuration Error meter configuration was not successful Demand Reset a demand reset occurred DST Time Change DST adjustment forward or backward has occurred Event
97. s FCC Part 15 Class B This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC rules These rules are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Re orient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help This device complies with Part 15 of the FCC rules THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS 1 THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE AND 2 THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION
98. s programmable from 0 01 to 1000 00 watthours per pulse in 0 01 increments This pulse constant applies to secondary readings only For example a watthour pulse constant of 1 8 corresponds to 1 8 watthours per pulse Some example pulse weight calculations Example 1 Calculation of Pulse Weight If the customer pulls a 240V CL200 singlephase Form 2S electromechanical meter from service with the following Meter Kh 7 2 watthours disk revolution Pulse Initiator 4 pulses disk revolution then this electromechanical meter has the following pulse weight PW PW Kh PDR 7 2 watt hours per disk revolution 7 4 pulses per disk revolution PW 1 8 watt hours per pulse If this meter is replaced by a Load Profile register of the same form number voltage and current ratings and if the utility wants the register to operate the same way the pulse weight would be entered in the customer files as 1 8 watthours per pulse Example 2 Calculation of Pulse Weight A Load Profile register on a singlephase 240V CL200 meter is programmed so that kWh is recorded into mass memory The maximum 16 bit data resolution is desired for 15 minute intervals First calculate the maximum watthour accumulation during 15 minutes intervals Wh Max 2240 V X 200A X Iphase X 0 25 Wh Max 12 000 watt hours 58 CENTRONO Meter Technical Reference Guide Operation C12 19 C1SD C1ST and C1SL Versions The maximum number of pulses is 65 535 the
99. ssing gently at the bottom of connector to mate the connector to metrology board Then gently press the top of the connector to mate it to the register module The connector is seated correctly when you hear it snap into place os o os e i arata i S Figure 10 Circuit Board Notches Be sure to use the meter base for leverage instead of the LCD holder Pressure on the LCD holder may damage the personality module CENTRONO Meter Technical Reference Guide 15 Installation Figure 11 Board to Board Connector Bottom 8 Ensure the board to board connector is fully seated by pressing firmly in on the middle of the connector Figure 12 Board to Board Connector Top 9 Carefully replace the inner protective cover Engage the top snaps first taking care to place the slot at the top of the cover over the IR light pipe Failure to do so could break the light pipe Ensure that all four meter base tabs are engaged with the slots at the top and bottom of the inner cover 10 Place the cover over the meter base until the flange on the cover is flush with the flange on the meter base 11 Tum the cover clockwise until the locking tabs are fully engaged with the meter base 12 If the cover has a Demand Reset or an Optical Connector be sure these are properly aligned with their corresponding accessory on the register faceplate If not aligned correctly the Demand Reset or Optical Connector will not function properly If the De
100. stored to the appropriate registers The ERT type 4 message indicates that the device is sending this message supports transmitting a single SCM in the XXXXX format Interval Data Message IDM The ERT type 7 message transmits one SCM and one IDM type 23 message The type 23 ERT indicates the transmission of a single IDM message in the XXXXX XX format The RF Personality Module allows meter data to be collected automatically helping to save time improve reliability increase accuracy and ensure data security Kilowatt hours and tamper data are reported through RF transmissions The R300 IDM module provides both baseline and advanced data collection functionality including interval data recording and enhanced tamper reporting capability The R300 IDM delivers the Standard Consumption Message to any of Itron s radio based data collection technologies including handheld computers a vehicle based Mobile AMR unit such as the Mobile Collector or a network data collection solution such as the Itron Fixed Network or MicroNetwork In addition the R300 IDM is also capable of delivering the Interval Data Message to the Itron Fixed Network AMR system to calculate ANSI standard demand time of use and load profiling information Physical Description C1SR The CISR personality module is constructed of a flame retardant printed circuit board material which supports the discrete surface mounted and integrated circuit components A microstrip etche
101. t via RF primary readings Meters are labeled accordingly when factory programmed The display will scroll between the billing register and the segment check mode based on the factory programming option Option Description 1 7 second billing register display 1 second blank 7 second segment check display 7 7 2 7 second billing register display 1 second blank 1 second segment check display 7 1 3 Only the billing register is displayed 7 0 CISR Electronic Detent The CISR module displays energy in increments of whole values of kWh Standard operation for this module is to accumulate both forward and reverse energy flow in the positive direction However the CISR personality module is available with an electronic detent that will cause the meter to ignore reverse energy flow Therefore if the meter is inverted the registers will accumulate in the forward direction only thus providing uni directional operation At the time of order the CISR module can be selected to have a detent register When the meter is undetented both forward and reverse energy will be accumulated Therefore the electronic load indicator will flash at a rate equal to the energy consumption regardless of the direction of the energy flow When the electronic detent is enabled only forward energy flow will be accumulated Net Metering The CISR module is available with the option of net metering capability When the net option is enabled re
102. tandard meter base as shown below From the base metrology the energy data is transmitted to the personality modules which contain the meter display communication mediums and register functionality Personality Modules are voltage specific and should be ordered based on the meter s metrology CENTRONO Meter Technical Reference Guide General Information Figure 5 CENTRON Personality Module Assembly Product Availability The current offerings for the CENTRON are Metrology Class 100 120V Form 1S Class 200 240V Form 2S Class 320 240V Form 2S Class 20 120V Form 3S Class 20 240V Form 3S Personality C1S LCD 5x1 or 4x10 Modules C1SR R300C Radio Frequency C1SC Cellnet Data System Battery Class 20 240V Form 4S Class 200 120V Form 12S Class 200 120V Form 25S C1SD Demand C1ST Time of Use TOU C1SL Load Profile C1S_R2 R3 R300CD CD3 where D T orL The CENTRON C1SD Clock C1ST and C1SL modules contain a battery that powers the clock circuit during a power outage The battery is permanently soldered to the module and is expected to last the life of the module Refer to Operation C12 19 CISD CIST and CISL Versions see Operation C12 19 CISD CIST and CISL Versions on page 41 for detailed battery information CENTRONO Meter Technical Reference Guide General Information Covers The outer cover configurations available for CENTRON meter family are described below
103. the equipment can be sent back to the factory Contact your Itron Sales Representative for assistance Repair of Meters Not Under Warranty The same procedure as above applies Itron will charge for the necessary repairs based on the failure Service Return Address Itron Inc Customer Repair Department 313 North Highway 11 Dock C West Union SC 29696 U S A Recycling Information The product you have purchased contains a battery or batteries circuit boards and switches The batteries are recyclable At the end of the meter s useful life under various state and local laws it may be illegal to dispose of certain components into the municipal waste system Check with your local solid waste officials for details about recycling options or proper disposal Although polycarbonate is not a commonly recycled plastic the recycling number for the polycarbonate inner cover outer cover and base is seven 7 iv CENTRONO Meter Technical Reference Guide Table of Contents Proprietary Rights Notice au uua aaa aaa aaa nenen neve reze r ester ee vere ee eee esen re eter ee eee inttr entente rns nnns sinn inns ii Trademarks Used in This Manual au uu aaa aaa aaa ann anes eee eee nese ee ee enen cnc ii Compliance With FCC Regulations sse sere kene ee enne nnn nnne nene iii FGG Parto Class Bisnis i timen uini in ene do CH d iii FCG Part 15 Subparb O aio etit eR ree SER ORNARE TURA AREE DE k r add sig HORNY T
104. ugh the Windows Start menu Rate Schedules Four independent rates are available for TOU registration These are designated A B C and D Only one of these rates can be active at a time The Total register designated Rate t is always active regardless of the active rate period The CENTRON meter TOU rates are applied to all energy and demand registers that have been selected for measurement Therefore all energy and demand registers are segmented as per the TOU schedule and available in each rate period in addition to the Total rate Daily Patterns Each pattern defines the times during the day that rate period A B C or D begins and ends Up to 24 rate period changes also called switchpoints may be specified for each daily pattern Day Types There are four day types Weekday Saturday Sunday and Holiday Each day of the week is assigned to one of the four day types Each day type is assigned one of the four daily patterns when each season is defined Any of the daily patterns can be used in any combination with the day types The CENTRON meter TOU implementation supports up to 44 holidays per year it also supports leap years Seasonal Schedules A season is a period of weeks during the year when a particular rate structure is in effect The year can be divided into a maximum of eight seasons The day types with associated daily patterns can be defined differently for each season Up to eight season change dates are specifie
105. unt Binary Tamper Count 0001 1 0010 2 0011 3 0100 4 0101 5 0110 6 0111 7 1000 8 1001 9 1010 10 1011 11 1100 12 1101 13 1110 14 1111 15 Retrofitting the C1SR Personality Module The CENTRON R300 is a one way radio frequency personality module that transmits within the unlicensed 910 920 MHz frequency band governed by the US Code of Federal Regulations CFR Title 47 Part 15 Radio Frequency Devices Sub Part C Paragraph 247 Intentional Radiator Any device operating within this unlicensed frequency band must contain an FCC Identification number Therefore the FCC ID Label included in the Retrofit Kits must be placed on the meter as shown below The retrofit kits for upgrading a meter to RF capability are only available for energy only meters CENTRONO Meter Technical Reference Guide 33 Operation C1SR Version Recent revisions to the CISR module include placing the FCC ID on the module itself as shown in the figure below yr o E kie FOO 10 FOCETSA 1 EI Pish P i Figure 27 CISR FCC Label Location Changes or modifications not expressly approved by Itron could void the user s authority to operate the equipment To retrofit an existing meter with a R300 module see Retrofitting with Personality Modules on page 13 34 CENTRONO Meter Technical Reference Guide CHAPTER 6 Operation C1SC Version In This Chapter Physical DescriptiOI iia iia Fast d a r vie arae rt taa 36
106. ving Time DST begins for most of the United States at 2 00 a m on the first Sunday of April Time reverts to standard time at 2 00 a m on the last Sunday of October In the U S each time zone switches at a different time Beginning in 2007 DST will begin on the second Sunday of March and end the first Sunday of November The Secretary of Energy will report the impact of this change to Congress Congress retains the right to revert the Daylight Saving Time back to the 2005 time schedule once the Department of Energy study is complete Demand The average value of power over a specified interval of time Demand is expressed in kilowatts kilovoltamperes kilovars or other suitable units An interval may be 1 5 10 15 30 or 60 minutes CENTRONO Meter Technical Reference Guide 83 Glossary of Terms Demand Delay Cold Load Pickup CLPU The programmable amount of time required before demand calculations are restarted after a power outage Demand Interval The specified time over which demand is calculated Demand Reset When all the current maximum demands are set to Zero Demand Subinterval The smaller blocks of time that are used in rolling demand calculations Demand Threshold A programmed value that when exceeded by calculated demand initiates a contact closure a write to a log or a phone home event Display LCD Provides a visual indication of the data accumulated by the register Ele
107. ween devices SCM The 96 bit Itron amp Standard Consumption Message protocol SCM provides the energy KWh consumption module ID number tamper indications meter type and error checking information in each radio frequency transmission Within the 96 bit SCM 26 bits are allocated to the module ID number for meter identification also referred to as ERT ID number Season A programmable amount of time that a rate schedule is in effect Season start dates are programmed in the format MM DD Month Day Self reading Registers Register data that is captured in the meter at a programmed interval of time and is stored in non volatile memory Glossary of Terms Sliding Window Demand See Rolling Interval Demand Test Mode One of the four modes of register operation It allows testing of the register without altering billing data Time of Use TOU A metering method which records demand during selected periods of time so consumption during different time periods can be billed at different rates VT Ratio The voltage transformer ratio to use for viewing voltage quantities for a service point Electronic Detent Programming electronic detent prevents received energy from accumulating in the delivered energy register When detent is enabled the received energy is accumulated in a separate register CENTRONO Meter Technical Reference Guide 85 Glossary of Terms Notes 86 CENTRONO Meter Technical

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CENTRON® Meter Technical Reference Guide