FCC Part 15.247 Certification Test Report FCC ID: SK9C1A-3 FCC Rule Part: 15.247 ACS Report Number: 05-0122-15C Manufacturer: Itron Electricity Metering, Inc. Equipment Type: Electricity Meter With FHSS Transmitter Trade Name: CENTRON ™ ICARe Model: C1A-3 Installation and Operators Guide 5015 B.U.
CENTRON® Meter Technical Reference Guide Effective: January 2005
Proprietary Rights Notice This manual is an unpublished work and contains the trade secrets and confidential information of Itron, Inc., which are not to be divulged to third parties and may not be reproduced or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.
Compliance With FCC Regulations 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.
Cet appareillage numérique de la classe B répond à toutes les exigences de l'interférence canadienne causant des règlements d'équipement. L'opération est sujette aux deux conditions suivantes: (1) ce dispositif peut ne pas causer l'interférence nocive, et (2) ce dispositif doit accepter n'importe quelle interférence reçue, y compris l'interférence qui peut causer l'opération peu désirée. Factory Repair of Meters Itron recommends that all repairs be performed at the factory.
TABLE OF CONTENTS Chapter 1 General Information About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Pre-June 2003 LCDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Post-June 2003 LCDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Non-Detented Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Demand Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Recommended Energy Testing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 AEP Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 Field Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES Figure 1.1 1.2 1.3 1.4 1.5 1.6 1.7 2.1 2.2 2.3 2.4 2.5 2.6 3.1 3.2 3.3 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 6.1 6.2 6.3 6.4 7.1 7.2 7.3 7.4 Figure Titles Page Personality Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Form 1S, 120 Volt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Figures Figure 8.1 8.2 8.3 9.1 9.2 9.3 9.4 9.5 9.6 x Figure Titles Page LED Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 Pulse Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 TOU Rate Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF TABLES Table 1.1 5.1 5.2 5.3 5.4 5.5 5.6 6.1 8.1 8.2 8.3 8.4 Table Titles Page Outer Cover Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 LCD Display Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Register Display Formats . . . . . . . . . . . . . . . . . . . . .
List of Tables Notes: xii CENTRON Meter Technical Reference Guide
Chapter 1 General Information This technical reference guide explains the installation, operation, and maintenance of the Itron CENTRON® 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+® Programming Software and the PRO-READ® handheld reader programmer discussed in this manual, refer to their respective user manuals.
General Information General Description The CENTRON meter family is a solid-state, singlephase and network meter used for measuring electrical energy consumption. The CENTRON incorporates a twopiece design combining a base metrology with a variety of personality modules that snap on the standard meter base.
General Information 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.
General Information Personality Modules All of the personality modules in the CENTRON meter family snap into the module holder located on the standard meter base (see Figure 1.5). From the base metrology, the energy data is transmitted to the personality modules, which contain the meter display, communication mediums, and register functionality. Figure 1.
General Information Covers The outer cover configurations available for CENTRON meter family are described in Table 1.1. Meter Versions Table 1.1 Outer Cover Configurations Cover Options Polycarbonate C1S, C1SR, C1SC C1SD, C1ST, C1SL Standard Including Demand Reset+ Optical Tower Glass Optional Not Available Outputs The C1SD, C1ST, and C1SL personality modules are available input/output-ready (I/O-ready). These modules contain circuitry that allows future functionality expansion through I/O modules.
General Information Characteristic Data Starting Watts Temperature Rise 2S CL200 5W 1S, 2S CL320, 12S, 25S 10W 3S CL20 1.2W 4S CL20 2.4W Meets ANSI C12.1 Section 4.7.2.9 Burden Data Metrology Voltage Watt Loss VA 120 240 240 240 240 120 0.45 0.45 0.65 0.65 0.65 0.65 3.7 7.2 10.2 10.2 10.2 5.4 1S 2S Class 200 2S Class 320 3S 4S 12S/25S 240V Register Watt Loss VA 120V Register Watt Loss VA LCD R300 CellNet D/T/L 0.01 — 1.34 0.25 1.34 0.25 0.90 14.76 LCD R300 CellNet D/T/L 0.
General Information Technical Data Meets applicable standards: • • • • • • • ANSI C12.1-1995 ANSI C12.10-1997 ANSI C12.16 (Solid State Meters) ANSI C12.18 (Optical Communications Protocol) ANSI C12.20 (Class 0.5) - 1998 IEC 61000-4-4 IEC 61000-4-2 Dimensions The following dimensional measurements are shown in inches and (centimeters). Figure 1.6 Dimensions A B C Polycarbonate D E 6.29 (16.00) 6.95 (17.70) 2.70 (6.90) 3.16 (8.00) 4.53(11.50) 3.64 (9.20) 5.01 (12.70) Glass 6.42 (16.
General Information C1SD/C1ST/C1SL Dimensions The following dimensional measurements are shown in inches and (centimeters). Figure 1.7 C1SD/C1ST/C1SL Dimensions A B C 6.95 (17.70) 6.29 (16.00) 2.70 (6.90) Polycarbonate D E 3.16 (8.00) 4.53(11.50) F G H 4.98(12.70) 6.29(16.00) 6.95 (17.70) Shipping Weights The following weight measurements are shown in pounds and (kilograms). Meter 4 Meters and Carton 96 Meter Pallets 1-8 Polycarbonate Glass 1.375 (0.623) 8.90 (4.04) 214 (97.30) 2.
Chapter 2 Installation This chapter of the guide gives instructions for the proper handling and installation of the CENTRON meter. Inspection Perform the following inspections when you receive the meter: • • • • Inspect for obvious damage to the cover, base, and meter assembly. Be sure the optical connector is free of debris. Compare the meter and register nameplates to the record card and invoice. Verify the type, class, voltage, form number, and other pertinent data.
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.
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 12S/25S CENTRON meter: • • • • This version of the meter should not be used in a non-Form 12S or 25S metering service.
Installation Board-to-Board Connector Figure 2.1 Removing the Board-to-Board Connector 5 Remove the register module, one side at a time, by pulling gently outward on the meter frame snaps (see Figure 2.2) while lifting the module up. Meter Frame Snaps Figure 2.2 Removing the Register Module 6 Snap the new module into the meter frame by aligning the notches at bottom of the circuit board with the lower two snaps (see Figure 2.3).
Installation Figure 2.3 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 (see Figure 2.4) and pressing gently at the bottom of connector to mate the connector to metrology board (see Figure 2.5). Then, gently press the top of the connector to mate it to the register module (see Figure 2.6). The connector is seated correctly when you hear it snap into place. Notches (2) Figure 2.
Installation Be sure to use the meter base for leverage instead of the LCD holder (see Figure 2.5). Pressure on the LCD holder may damage the personality module. Figure 2.5 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 2.6 Board-to-Board Connector, Top 9 2-6 Carefully replace the inner protective cover.
Installation 10 Place the cover over the meter base until the flange on the cover is flush with the flange on the meter base. 11 Turn 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.
Installation Notes: 2-8 CENTRON Meter Technical Reference Guide
Chapter 3 Operation: Base Metrology This chapter describes the measurement technique used for the base metrology on the CENTRON meters. CENTRON 1S, 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.
Operation: Base Metrology The output voltage of the Hall Effect device is then: V hall = V out = GIV = GPower Where G = ( C ⁄ R )K G is the combined gain factor of the entire system (Voltage to biasing current, line Current to flux density, Hall sensor). ib Figure 3.1 Power Measurement Principle in 2S 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 Figure 3.2).
Operation: Base Metrology Figure 3.2 Simplified CENTRON Architecture 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.
Operation: Base Metrology For these metering applications, the biasing current Ibias (Ibias1 and Ibias2) applied to each sensor is generated from the line voltage (Vline1 and Vline2) using a resistor. The magnetic field is generated by the line current (Iline1 and Iline2) that flows through the conductor looped around each core. The voltage (Vout1 and Vout2) that is formed on each Hall Effect device is proportional to the watts produced by each phase.
Chapter 4 Operation: C1S Version The kWh only version of the CENTRON meter is available with an LCD personality module to register energy accumulation. Figure 4.1 C1S LCD Personality Module The LCD module may be ordered with a 5x1 or 4x10 register for self-contained meters, and a 5xTR or 4xTR register for transformer-rated meters.
Operation: C1S Version Figure 4.2 Mounted LCD 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. Therefore, if the meter is inverted, the registers will accumulate in the forward direction, thus providing uni-directional operation. At the time of order, the LCD module can be selected to have a detent register.
Operation: C1S Version Figure 4.3 ZRO-C2A Resetter Connected to the CENTRON The ZRO-C2A Resetter works with both pre-June 2003 and Post-June 2003 LCDs. 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 (C1SR). The ZRO-C2A also resets the tamper indicators in the C1SR. The ZRO-C2A requires that the meter Not Be Powered.
Operation: C1S Version All current production resetters and resetters produced after June of 2001 were built with the C2A upgrade and are labeled accordingly as shown in Figure 4.4 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. Figure 4.4 Reverse Side of ZRO Resetter LCD Display Function The CENTRON LCD has been updated as of June 2003.
Operation: C1S Version The non-segment check version displays only the kWh reading. A downward pointing arrow on the LCD pulses at a rate equal to the energy consumption. The arrow flashes on for 1 watthour and off for 1 watthour. This effectively produces an equivalent Kh of 2.0. Infrared LED Kh is 1.0. Figure 4.6 LCD Display without Segment Check A second version of the LCD is available which displays the kWh reading and a segment check (see Figure 4.7).
Operation: C1S Version Post-June 2003 LCDs The post-June 2003 LCD module is shown in Figure 4.8. This display uses five 7-segment digits, four icons to indicate the type of displayed data, and three icons to represent a watt 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. Figure 4.
Operation: C1S Version Detented Register The Detented Register addresses applications requiring the reading of delivered kWh only. Received energy is discarded. Figure 4.10 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 4.
Operation: C1S Version 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.
Chapter 5 Operation: C1SD, C1ST, and C1SL Versions 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: • • • C1SD—a demand module C1ST—a Time-of-Use (TOU) module with demand C1SL—a load profile module with TOU and demand Figure 5.
Operation: C1SD, C1ST, and C1SL Versions • Self-Read Capability—Billing data can be stored automatically at programmable times to be read later. Load Profile—The C1SL module provides 32K RAM for load profile data. Expansion Capability—An expansion port is available for future functions. Bidirectional Metering—All three multifunction versions are capable of measuring and displaying forward and reverse energy only (kWh). These modules have two separate registers; one for forward kWh and one for reverse kWh.
Operation: C1SD, C1ST, and C1SL Versions Modes of Operations When the C1SD, C1ST, and C1SL 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 alternate between CNTRON and Segment Test. A programmed module will scroll through the Normal display sequence, displaying each selected quantity, annunciator, and code number for the programmed duration.
Operation: C1SD, C1ST, and C1SL Versions mode program parameters are then retrieved from nonvolatile memory for use in the Test mode. In the C1SL version, a status bit is set to indicate the register was placed in Test mode. The Test mode can be activated while in either Normal or Alternate mode using the Test mode switch (see Figure 5.3) or a meter programming device. To activate the Test mode with a programming device, refer to the PC-PRO+ documentation.
Operation: C1SD, C1ST, and C1SL Versions Low Power Mode The demand, TOU, and load profile modules are shipped from the factory in low power mode unless factory programming is specified at time of order. This mode consists of a default program and minimizes drain on the battery. The user can place the meter in low power mode by performing a three button reset or by programming the meter with the programming software as a demand-only meter.
Operation: C1SD, C1ST, and C1SL Versions appropriate energy and demand quantities. When an energy or demand quantity for the currently active TOU rate (A, B, C, or D) is displayed, the corresponding TOU rate indicator will flash on and off once per second. To the right of the TOU rate annunciators is the kWh annunciator. This annunciator can be programmed to display with any energy quantity. The kWh annunciator can be programmed to display as kW with any demand quantity.
Operation: C1SD, C1ST, and C1SL Versions Table 5.
Operation: C1SD, C1ST, and C1SL Versions Energy and demand registers can be programmed to be displayed in any of the specified formats (see Table 5.2). Table 5.2 Register Display Formats 3 Digits Demand Energy 4 Digits 5 Digits 6 Digits X.XXX XX.XXX XXX.XXX X.XX XX.XX XXX.XX XXXX.XX XX.X XXX.X XXXX.X XXXXX.X XXX XXXX XXXXX XXXXXX X.X.X* X.X.X.X* XX.X.X.X* XXX.X.X.X* XX.X XXX XXX.X XXXX XXXX.X XXXXX XXXXX.
Operation: C1SD, C1ST, and C1SL Versions Last Season Registers For a C1ST or C1SL meter, Last Season Registers are selectable in the programming software. For every Current Season Register there is a Last Season Register for the same quantity. Last Season registers are stored in memory when a season change occurs. Last Season registers are designated as LS in the programming software. Last Season Registers are selectable for display in Normal and Alternate modes.
Operation: C1SD, C1ST, and C1SL Versions Table 5.3 Programmable Parameters Parameter Description Register Full Scale A kW demand value that defines the maximum rated demand for a particular meter installation. Valid entries range from 0 to 999999. Test Mode Timeout The number of minutes the meter will remain in Test mode before exiting to Normal mode. This timeout function is active when Test mode has been activated via remote communications. Valid entries range from 1 to 99 minutes.
Operation: C1SD, C1ST, and C1SL Versions Table 5.4 Information Data Items Item Description Meter ID Numbers 1 and 2 Two separate nine digit display items that can be used to identify the meter with an alpha character displayed as a dash, a space displayed as a blank, and a number displayed as the appropriate value. User Fields Up to three separate user fields are available to display any desired numerical information.
Operation: C1SD, C1ST, and C1SL Versions Table 5.4 Information Data Items Item Description TOU Expiration Date * A date that indicates when the register's TOU schedule will no longer be valid. Register Full Scale Value A kW demand value that represents the maximum rated demand for a particular meter installation. Exceeding this value triggers error code 100000. Demand Threshold Value A programmed threshold value in kW that determines when the demand threshold output turns on.
Operation: C1SD, C1ST, and C1SL Versions Programming the Meter With a 200 Series Program A CENTRON meter can be programmed using an existing Series 200 program. This procedure is a two-step process. First, export the 200 Series program you want to use to a CENTRON file format and then import that file into PC-PRO+ as follows: 1 Open the Program Editor. 2 Select File | Export. The Export screen shown in Figure 5.5 is displayed. Figure 5.
Operation: C1SD, C1ST, and C1SL Versions Figure 5.6 Program File Export Type 5 Select CENTRON export format as shown in Figure 5.6 above. 6 Click OK. The file you selected in Figure 5.5 is converted to a CENTRON format. The program ID remains the same, but the file type becomes CENTRON. 7 Select File | Import. The Import screen shown in Figure 5.7 is displayed. Figure 5.7 Import Screen 8 Select the CENTRON program to import from the list of available EXP files. 9 Click OK.
Operation: C1SD, C1ST, and C1SL Versions Demand Reset A demand reset can occur in both Normal and Alternate modes. A demand reset can occur in two ways: • • Through the optical port using a compatible programming device With the standard push-button demand reset switch located on the face of the meter (see Figure 5.2) When a demand reset is initiated, the following events occur: • • • • • • • • As an indication of a demand reset, the display flashes all eights for six seconds.
Operation: C1SD, C1ST, and C1SL Versions Rate Schedules Four independent rates are available for TOU registration-designated A, B, C, and D. Only one of these rates can be active at a time. The Total register is always active, regardless of the active rate period. The currently active rate is indicated by a flashing rate-specific annunciator. Daily Schedules Up to four daily schedules are available.
Operation: C1SD, C1ST, and C1SL Versions Last Season Registers Last Season Registers are selected when two or more seasons are used during the year. For every Current Season Register there is a Last Season Register for the same quantity. Last Season Registers are designated LS in the programming software. Last Season Registers can also be selected for display in Normal and Alternate display modes.
Operation: 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. This interval length is independent of the interval length chosen for displayed demand quantities. Power Outage The C1SL 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.
Operation: C1SD, C1ST, and C1SL Versions The maximum number of pulses is 4095; therefore, the smallest pulse weight (PW) that can be used is: 12, 000Wh 2.94Wh PW, Min = ----------------------------- = --------------------4095P Pulse Data Storage The Load Profile register stores data in mass memory at the end of each interval. This data stored is the pulse data for that interval. This process continues for each interval until sixty intervals have been recorded.
Operation: C1SD, C1ST, and C1SL Versions Table 5.6 Recording Duration for 32Kb Interval Length (min) Recording Duration (days) 1 12.75 2 25.50 5 63.75 10 127.50 15 191.25 30 382.50 60 765.00 Optional Features 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.
Operation: C1SD, C1ST, and C1SL Versions Calculations Energy Calculation of energy is continuously incremented by multiplying the energy pulse weight by the measured energy.
Operation: C1SD, C1ST, and C1SL Versions Demand Calculations Block Interval Demand Block demand corresponds to the number of subintervals being equal to one. At the end of every interval, the microprocessor compares the last completed block interval demand value to the demand value in memory. If the new value is greater than the stored value, the new demand value is stored as Maximum Demand. When a demand reset occurs, maximum demands are reset to zero and the current interval continues.
Operation: C1SD, C1ST, and C1SL Versions 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 C1ST and C1SL 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.
Operation: C1SD, C1ST, and C1SL Versions Figure 5.8 CENTRON C1ST/L Battery Life An explanation of Figure 5.8 is as follows: The Available Battery Capacity line is a function of time. Recent changes made to the design (optimized battery current consumption at the transition phase from AC power ON to AC power OFF), allowed the CENTRON to further improve the available battery budget over time.
Operation: C1SD, C1ST, and C1SL Versions not cross the Battery Capacity line until beyond year 15. The battery is not considered depleted until the Current Draw line crosses the Available Battery Capacity line. Figure 5.9 Example 1 Example 2 For example 2 (see Figure 5.10), the meter is unpowered (with battery running the clock) for six years then installed in the field under AC power.
Operation: C1SD, C1ST, and C1SL Versions Example 3 For example 3 (see Figure 5.11), the meter is unpowered (with battery running the clock) for an infinite amount of time. This shows that the Current Draw line will not cross the Battery Capacity line until past year 8. Figure 5.11 Example 3 Low Battery Error The TOU and LP module firmware counts minutes on battery (when the battery is enabled) during power outages. Current production revision (10.
Operation: C1SD, C1ST, and C1SL Versions Effectivity Date Meters shipped after October 1, 2003 have this revision of hardware with extended battery life capability. This revision of module can also be identified by the inspection of the module part number etched into the module itself. This revision has a part number of 442701-xxx.
Operation: C1SD, C1ST, and C1SL Versions The kWh value broadcast in its SCM shall have six (6) significant digits. The R300CD converts the floating point BCD kW reading extracted from the CENTRON self read register to a fixed implied decimal with two digits of resolution to the right of the decimal point (.01 kW). The maximum kW measured is therefore restricted to 9999.99 kW. Figure 5.12 on page 5-28 is a block diagram of R300CD hardware.
Operation: C1SD, C1ST, and C1SL Versions The meter will transmit zeros for kWh and kW until it is programmed. For detailed programming instructions, see the PC-PRO+ documentation. Also refer to the CENTRON R300CD Quick Install Guide. Errors The table below shows how fatal and non-fatal errors affect R300CD RF transmission.
Operation: C1SD, C1ST, and C1SL Versions Notes: 5-30 CENTRON Meter Technical Reference Guide
Chapter 6 Operation: C1SR Version The Itron CENTRON C1SR is a one-way, unlicensed radio frequency (RF) personality module that attaches to the CENTRON meter base (See Figure 6.1). It offers a cost-effective solution for the endpoints in automatic and off-site meter reading applications. The CENTRON C1SR operates similar to the existing R300 module that is utilized by the J5 electromechanical meter.
Operation: C1SR Version Physical Description The C1SR personality module is constructed of a flame retardant printed circuit board material which supports the discrete, surface-mounted, and integrated circuit components. A microstrip etched on the circuit board serves as the RF antenna. The C1SR 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.
Operation: C1SR Version The transformer rated meters can be programmed to display either a 5xTR 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).
Operation: C1SR Version Transmission Scheme A transmission cycle contains a wait period before and after each message burst and a period of random silent time. The silent time is determined by the scaling factor, which sets a minimum and maximum silent time between each transmission cycle. The transmission frequencies (within the 910-920 MHz band), the frequency hopping pattern, and the time interval between transmission cycles are completely random in nature.
Operation: C1SR Version Tamper Detection The CENTRON C1SR 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.
Operation: C1SR Version Table 6.
Operation: C1SR Version Changes or modifications not expressly approved by Itron could void the user's authority to operate the equipment. To retrofit an existing meter with an R300 module, follow "Retrofitting with Personality Modules" on page 2-3.
Operation: C1SR Version Notes: 6-8 CENTRON Meter Technical Reference Guide
Chapter 7 Operation: C1SC Version The Itron C1SC 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.
Operation: C1SC Version Physical Description The C1SC 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.
Operation: C1SC Version CC ELL ELL NN ET ETEE LECTRICITY LECTRICITYINTERVAL INTERVALTT ELEMETRY ELEMETRY kWh kWh (Pulses) (Pulses) 0 0 1 1 1 0 Time Time 2.52.
Operation: C1SC Version Figure 7.3 C1SC LCD The display will scroll between the billing register and the segment check mode based on the factory programming option.
Operation: C1SC Version Figure 7.
Operation: C1SC Version Notes: 7-6 CENTRON Meter Technical Reference Guide
Chapter 8 Testing, Troubleshooting, and Maintenance This section provides information and instructions to help you test and maintain the CENTRON meter.
Testing, Troubleshooting, and Maintenance 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. Figure 8.
Testing, Troubleshooting, and Maintenance Figure 8.3 TOU Rate Annunciators Test Mode Annunciator The CENTRON meter is equipped with a Test Mode LCD annunciator located in the left 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 when test mode is activated. (Available on the C1SD, C1ST, and C1SL.
Testing, Troubleshooting, and Maintenance To determine the number of pulses per second, use the following equation: 1hr Number of Pulses per sec = Wapp × ------------- × 1Kh 3600 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.
Testing, Troubleshooting, and Maintenance Troubleshooting Error Codes (R300) Non-Fatal Error Cause Effect Indication Stops RF transmission but continues energy accumulation and will be cleared after a power cycle. Checksum Error of the Energy Register The LCD will display the annunciator, a downward pointing arrow, in the lower right hand corner. Fatal Error Cause Effect Indication Unsuccessful writing to or reading from EEPROM memory. All metering and RF functions are halted.
Testing, Troubleshooting, and Maintenance Non-fatal errors can be programmed to scroll during the one second display offtime or lock on the register display. If multiple non-fatal errors occur, the meter will display a combined error message. For example, if a low battery error and a clock error exist, the error display will read ER 010001. 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.
Testing, Troubleshooting, and Maintenance Table 8.3 Non-Fatal Error Codes Code Er 030000 Error Possible Causes Load Profile Error Load Profile Error—Reprogram register and check for proper operation; checked upon programming and once per second Discussion: A Load Profile error occurs when the Load Profile parameter is out of range or inactive.
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.
Testing, Troubleshooting, and Maintenance Software Cannot Communicate with Module Cause Solution Optical Probe Cable Assembly Failure Check cable with known register that communicates. Check cable against known cable that is functioning. Also check batteries in cable assembly. Com Port in PC is Set Wrong Verify proper Com Port number has been selected in the programming software. If the wrong Com Port is selected, communications will not occur.
Testing, Troubleshooting, and Maintenance Test Mode Switch Does Not Place Module in Test Mode Cause Solution Switch Not Fully Depressed Verify that the test mode pushbutton has been completely depressed. Switch or Electronic Failure Replace module. Test Mode Items Not Selected Re-program module with items to be displayed in Test mode. Inspecting and Troubleshooting—C1S LCD and C1SR Blank Display Cause 8-10 Solution Power not applied to the meter Apply power.
Chapter 9 Specifications and Drawings Specifications For a complete list of the latest CENTRON specification numbers, refer to the CENTRON Meter Specification Numbers Bulletin, Part Number 428601-220. Drawings 1 1 0 LINE 0 + + 1 0 LOAD Figure 9.
Specifications and Drawings 1 0 2 1 LINE 0 2 1 0 2 LOAD Figure 9.2 Form 2S Wiring Diagram Figure 9.
Specifications and Drawings Figure 9.4 Form 4S Wiring Diagram Alternate positions of movable potential terminal Alternate positions of fifth terminal jaw Figure 9.
Specifications and Drawings Figure 9.
GLOSSARY Term Description annunciator A Liquid Crystal Display (LCD) label that is displayed to identify a particular quantity being displayed baud Unit of data transmission signalling speed, roughly analogous to bits per second (bps) display duration The programmed number of seconds that a quantity is displayed on the LCD before it is replaced with the next quantity in the display sequence EEPROM Electrically Erasable Programmable Read Only Memory.
Glossary Notes: G-2 CENTRON Meter Technical Reference Guide
Index A ADC 3-2, 3-4 AEP barcode 7-2 AEP test codes 8-4 alternate display mode 5-3 Alternate mode annunciator 5-5 Alternate Mode Magnetic Reed Switch 8-6 analog to digital converter (ADC) 3-2 annunciator 2-2, 5-5, 8-2–8-3, G-1 Alternate mode 5-5 disk emulator 8-4 EOI 5-6 kWh 5-6 Test 5-4 test mode 5-5 antenna RF 6-2, 7-2 Application Specific Integrated Circuit (ASIC) 3-2 ASIC 3-2–3-3 automatic demand reset 5-8 B barcode AEP 7-2 LAN address 7-2 base 1-2 base metrology 3-1 battery 1-4, 5-23 life 5-23 baud
Index energy calculation 5-21 energy consumption 4-5, 6-3 energy register 5-8 energy testing 8-1 EOI annunciator 5-6 EPROM G-1 error EEPROM 8-7 metrology 8-7 error checks 8-5 error code 8-5 Clock 8-6 Full Scale Overflow 8-7 Load Profile 8-7 Low Battery 8-6 Reverse Direction 8-6 TOU 8-6 ERT ID number 5-27 ESD damage 2-3 expansion modules 5-20 expansion port 5-20 F fatal errors 8-1, 8-5 field testing 8-1, 8-4 firmware G-1 fixed decimal G-1 floating decimal G-1 forward energy flow 4-2, 5-2, 6-3 forward kWh 5
Index module demand 5-5 LCD 4-2 load profile 5-1, 5-5 R300 6-1 register 2-4–2-5, 5-23 TOU 5-5 module holder 1-4 MOV 1-3 N non-fatal errors 8-1, 8-5–8-6 non-volatile memory 5-1, 5-3, 5-8, 6-1 nonvolatile memory G-1 normal display mode 5-3 O operating temperature range 2-2, 4-4, 6-2 C1SC 7-3 optical connector 2-2–2-3, 2-7 optical pickup 8-3 optical port 5-1, 5-15 optical port adapter 5-2 outer cover 1-5 removing 2-3 P PC-PRO+ Programming Software 1-1 personality module 1-2–1-5, 2-3, 2-6, 5-5, 5-28, 8-8
Index test mode 5-4 T tamper counter 5-28, 6-3 tamper detection 6-5 tamper indication 6-5 tertiary security code 5-20 Test annunciator 5-4 test codes AEP 8-4 test display mode 5-3 Test LED 3-3 test mode 8-3 test mode annunciator 2-2, 5-5, 8-3 test mode button 2-2, 5-4, 5-27 test mode switch 5-4, 8-10 testing energy 8-1 field 8-1, 8-4 support features 8-1 TOU schedule 8-1 three button reset 5-27 time blocks 5-15 time/date wrong 8-8 Time-of-Use 5-15 See also TOU Time-of-Use (TOU) 5-27 TOU 5-15, 5-23, 5-27,
