Schlumberger Sema C1SA Users manual

FCC Part 15 Certification

Test Report

FCC ID: F9CC1SA

FCC Rule Part: 15.247

ACS Report Number: 03-0248-15C

Manufacturer: Schlumberger Electricity, Inc.

Equipment Type: Electricity Meter With Dual RF Transmitters

Model: CENTRON ™ ICARe

Installation and Operators Guide

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: [phone]

CENTRON® Meter

Technical Reference Guide

Effective Date: August 2002

Proprietary Rights Notice

This manual is an unpublished work and contains the trade secrets and confidential infor­mation of SchlumbergerSema Inc., which are not to be divulged to third parties and may not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 SchlumbergerSema
Inc. All rights to designs or inventions disclosed herein, including the right to manufacture,
are reserved to SchlumbergerSema Inc.

The information contained in this document is subject to change without notice. Schlum­bergerSema reserves the right to change the product specifications at any time without
incurring any obligations.

Trademarks Used in This Manual

CENTRON is a registered trademark of SchlumbergerSema Inc.

PC-PRO+ is a registered trademark of SchlumbergerSema Inc.

PRO-READ is a registered trademark of SchlumbergerSema Inc.

Windows is a trademark of Microsoft Corporation.

CENTRON® Meter Technical Reference Guide

RES-CEN-0025-08.02

SchlumbergerSema Energy & Utilities
313-B North Highway 11
West Union, SC 29696
USA
Tel: [phone]
Fax: [phone]

SchlumbergerSema Energy & Utilities
6700 Century Avenue, Suite 100
Mississauga, Ontario L5N 2V8
Canada
Tel: [phone]
Fax: [phone]

Copyright© 2000-2002

SchlumbergerSema Inc.

All Rights Reserved.

ii

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. 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

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 SchlumbergerSema Inc. could void the
user’s authority to operate the equipment.

iii

Factory Repair of Meters

SchlumbergerSema 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 SchlumbergerSema 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 the equipment can be sent back to the factory. Contact your
SchlumbergerSema Sales Representative for assistance.

Repair of Meters Not Under Warranty

The same procedure as above applies. SchlumbergerSema will charge for the necessary
repairs based on the failure.

Service Return Address

SchlumbergerSema
Customer Repair Department
313 North Highway 11 Dock C
West Union, SC 29696

This equipment generates, uses, and can radiate radio frequency energy. If not installed and
used in accordance with the instructions manual, this equipment can cause interference to radio
communications. The equipment has been tested and found to comply with the limits for a Class
A computing device pursuant to FCC Part 15, Class A registration of FCC R ules, which are de­signed to provide reasonable protection against such interference when operated in a commercial
environment. Operation of this equipment in a residential area may cause interference in which
case the user will be required to correct the interference at his own expense. The user is encour­aged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna

• Increase the separation between the equipment and receiver
Consult the dealer or an experienced radio/TV technician for help

ATTENTION

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.

iv

North American Business Offices

Canada SchlumbergerSema Energy & Utilities

6700 Century Avenue, Suite 100
Mississauga, Ontario L5N 2V8
Canada
Tel: [phone]
Fax: [phone]

Mexico SchlumbergerSema Energy & Utilities

Ejercito Nacional 425
Nivel 7, Colonia Granada
Mexico City, Mexico
Tel: [phone]
Fax: [phone]

United States SchlumbergerSema Energy & Utilities

313-B North Highway 11
West Union, SC 29696
Tel: [phone]
Fax: [phone]

v

Notes

vi

TABLE OF CONTENTS

CENTRON® Meter Technical Reference Guide

Proprietary Rights Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Trademarks Used in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Compliance With FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

FCC Part 15, Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

FCC Part 15, Subpart C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Factory Repair of Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Repair of Meters Under Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Repair of Meters Not Under Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Service Return Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Chapter 1 General Information

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Meter Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Personality Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Product Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Display Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Characteristic Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Burden Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

C1SD/C1ST/C1SL Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Shipping Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Chapter 2 Installation

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Selecting a Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Installing the Meter into Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Programming the C1SD,T,L Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Retrofitting with Personality Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

CENTRON Technical Reference Guide vii

Table of Contents

Chapter 3 Operation: Base Metrology

CENTRON 1S, 2S CL200, and 3S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

CENTRON 2S CL320, 4S, 12/25S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Chapter 4 Operation: C1S Version

Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Kilowatt Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Resetting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

LCD Display Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Stepper Motor Revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Chapter 5 Operation: C1SD, C1ST, and C1SL Versions

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Modes of Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Alternate Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Programmable Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Register Display Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Self Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Last Season Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Informational Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Test Mode Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Programming the Meter With a 200 Series Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Demand Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

Time-of-Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

TOU Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Calendar Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Rate Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Daily Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Seasonal Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Daylight Savings Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Current Season Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Last Season Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Load Profile Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Bit Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Interval Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Power Outage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Channel Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Data Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

Recording Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

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Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

Electronic Detent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

Expansion Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

Security Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Demand Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

Power Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

Battery Life (Load Profile & TOU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

Three Button Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24

Option Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25

CENTRON R300CD Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25

Programming the R300CD Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26

Chapter 6 Operation: C1SR Version

Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Electronic Detent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Resetting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Transmission Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Tamper Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Testing the CENTRON C1SR Tamper Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Retrofitting the C1SR Personality Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Chapter 7 Operation: C1SC Version

Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Transmission Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Display Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

Resetting Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Programming the C1SC/CN1SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Chapter 8 Testing, Troubleshooting, and Maintenance

Testing Support Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Infrared Test LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Pulse Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Watthour Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

TOU Rate Annunciators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Test Mode Annunciator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

Testing with the Infrared Test LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

Testing Using the Disk Emulation Annunciator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

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Recommended Energy Testing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

AEP Test Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Field Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Required Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

Error Codes (R300) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

Non-Fatal Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

Fatal Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

Error Codes (Demand, TOU, and Load Profile) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

Non-Fatal Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

Fatal Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7

Inspecting and Troubleshooting—General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Blank Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Time and Date Wrong (TOU or Load Profile Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

No Accumulation of kWh or kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Software Cannot Communicate with Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Reed Switch Does Not Activate the Alternate Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Reset Mechanism Does Not Initiate Demand Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Demand Reset Cannot be Initiated Through PC or Handheld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Test Mode Switch Does Not Place Module in Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

Inspecting and Troubleshooting—C1S LCD and C1SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

Blank Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

Chapter 9 Specifications and Drawings

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

C1S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

C1SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

C1SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

C1SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

C1ST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

R300CD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

C1SL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7

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LIST OF FIGURES

Figure Figure Titles Page

1.1 Personality Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1.2 Form 1S, 120 Volt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.3 Form 2S, CL200 240 Volt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.4 Form 4S, 20 Amp Transformer-Rated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.5 Personality Module Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.6 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

1.7 C1SD/C1ST/C1SL Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

2.1 Removing the Inner Protective Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2 Removing the Two-lead Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.3 Removing the Board-to-Board Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.4 Removing the Register Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.5 New Module Snap-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.6 Circuit Board Notches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.7 Board-to-Board Connector, Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.8 Board-to-Board Connector, Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

3.1 Power Measurement Principle in 2S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.2 Simplified CENTRON Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.3 Hall Cells and ADCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

4.1 C1S Personality Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 Mounted Clock and LCD Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.3 Clock Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4.4 ZRO-C2A Resetter Connected to the CENTRON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.5 Reverse Side of ZRO Resetter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.6 LCD Display without Segment Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4.7 LCD Display with Segment Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.8 Stepper Motor Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

5.1 C1SL Meter with Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2 C1SL Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.3 Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5.4 Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.5 Program File Export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

5.6 Program File Export Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

5.7 Import Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

5.8 Battery Life Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24

5.9 CENTRON TOU Personality Module with R300CD Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26

6.1 C1SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2 CENTRON C1SR Transmission Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.3 FCC Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

7.1 C1SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2 CellNet Telemetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

7.3 C1SC/CN1SC Programming Port Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

8.1 LED Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.2 Pulse Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8.3 TOU Rate Annunciators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

9.1 Form 1S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7

9.2 Form 2S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8

9.3 Form 3S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8

9.4 Form 4S Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9

CENTRON Meter Technical Reference Guide xi

List of Figures

Figure Figure Titles Page

9.5 Form 12S Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9

9.6 Form 25S Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10

xii CENTRON Meter Technical Reference Guide

LIST OF TABLES

Table Table Titles Page

1.1 Outer Cover Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

5.1 LCD Display Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5.2 Register Display Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

5.3 Programmable Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

5.4 Information Data Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5.5 Test Mode Data Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

5.6 Recording Duration for 32Kb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

6.1 ReadOne Pro Tamper Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

8.1 AEP Test Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

8.2 Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8.3 Non-Fatal Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

8.4 Fatal Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7

9.1 C1S Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.2 C1SR Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

9.3 C1SC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

9.4 C1SD Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

9.5 C1ST Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

9.6 R300CD Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

9.7 C1SL Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

CENTRON Meter Technical Reference Guide xiii

List of Tables

Notes:

xiv CENTRON Meter Technical Reference Guide

Chapter 1 General Information

This technical reference guide explains the installation, operation, and
maintenance of the SchlumbergerSema CENTRON® meter family.
SchlumbergerSema urges you to read the entire manual before attempting
installation, testing, operation, or maintenance of a meter. To operate the
SchlumbergerSema PC-PRO+® Programming Software and the PRO-READ®
handheld reader programmer discussed in this manual, refer to their respective
user manuals.

About This Manual

This manual contains the following information as listed in the chapter
descriptions below:

Chapter 1
General Information

Chapter 2
Installation

Chapter 3
Operation: Base Metrology

Chapter 4
Operation: C1S

Chapter 5
Operation:C1SD, C1ST,
C1SL

Chapter 6
Operation: C1SR

Chapter 7
Operation: C1SC

Chapter 8
Testing, Troubleshooting,
and Maintenance

Chapter 9
Specification Numbers and
Drawings

Provides a general description, operation, physical and
functional descriptions, and complete meter specifications.

Gives instructions for the proper handling and installation.

Describes the measurement technique used for the base
metrology on the CENTRON meter.

Provides a physical description and operational
characteristics of the basic watthour (kWh) only meter for
Clock, Cyclometer, and LCD versions.

Provides detailed information and theoretical operation for
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.

Provides a physical description and the operational
characteristics of the R300 900 MHz radio frequency
personality module.

Provides a physical description and the operational
characteristics of the CellNet personality module.

Provides an explanation of the testing, troubleshooting, and
maintenance of the CENTRON meter.

Provides a listing of meter part numbers and drawings.

CENTRON Meter Technical Reference Guide 1-1

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. 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 (see Figure 1.1) The personality
modules available include the following versions:

• Energy only—C1S (clock, cyclometer, or LCD)

• Demand—C1SD

• Time-of-Use (TOU) with Demand—C1ST

• Load Profile with TOU and Demand—C1SL

• Energy only with radio frequency AMR—C1SR

• CellNet Fixed Network—C1SC

• Energy plus demand with radio frequency AMR - R300CD

Clock

Demand/TOU/Load Profile

CellNet

Cyclometer

LCD

R300

R300CD Option

Figure 1.1 Personality Modules

1-2 CENTRON Meter Technical Reference Guide

Physical Description

Meter Base

General Information

The CENTRON meter features a common meter base to which various personality
modules are attached. The covers come in configurations of polycarbonate and
glass.

The CENTRON meter base contains all of the measurement circuitry and
calibration information on a SchlumbergerSema 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 MOV, metal oxide varistor, which is used
to protect the meter from line surges.

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 12/25S configurations.Examples are
shown in Figure 1.2, Figure 1.3, and Figure 1.4.

Figure 1.2 Form 1S, 120 Volt Figure 1.3 Form 2S, CL200 240 Volt

Figure 1.4 Form 4S, 20 Amp Transformer-Rated

CENTRON Meter Technical Reference Guide 1-3

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.

Product Availability

Figure 1.5 Personality Module Assembly

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
Modules

Option Boards R300CD

C1S—Clock (5x1 or 4x10)

C1S—Cyclometer (5x1 or 4x10)

C1S—LCD (5x1 or 4x10)

C1SR—R300C (Radio
Frequency)

Class 20, 240V, Form 4S

Class 200, 120V, Form 12S

Class 200, 120V, Form 25S

C1SC—CellNet Data System

C1SD—Demand

C1ST—Time-of-Use (TOU)

C1SL—Load Profile

1-4 CENTRON Meter Technical Reference Guide

Battery

Covers

General Information

The CENTRON 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.

The TOU and Load Profile modules display a Low Battery error code (Er 000001) if
the minutes on the battery counter exceeds 525600 minutes (1 year). Refer to
Chapter 5,"Operation: C1SD, C1ST, and C1SL Versions" for detailed battery
information.

The outer cover configurations available for CENTRON meter family are described
in Table 1.1.

Table 1.1 Outer Cover Configurations

Meter Versions Cover Options

Polycarbonate Glass

C1S, C1SR, C1SC Standard Optional
C1SD, C1ST, C1SL Including Demand Reset+ Optical Tower Not Available

Outputs

Display Functions

Specifications

Electrical

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.

The C1S and C1SR modules can display kWh readings in either a 5x1 or 4x10
configuration.

The C1SD, C1ST, and C1SL modules can display a maximum of 32 Normal, 32
Alternate, and 8 Test display items, up to a total of 48 items.

Voltage Rating 120V, 240V
Operating Voltage ± 20% (60 Hz); ± 10% (50 Hz)
Frequency 60 Hz, 50 Hz
Operating Range ± 3 Hz
Battery Voltage 3.6 V nominal (C1ST, C1SL only)
Operating Range 2.7V - 3.8V
Carryover 1 year cumulative and 15 year shelf life

CENTRON Meter Technical Reference Guide 1-5

General Information

Operating Environment

Characteristic Data

Temperature -40°C to +85°C
Humidity 0% to 95% non-condensing

Accuracy

Transient/Surge Suppression

Starting Watts

Temperature Rise Meets ANSI C12.1 Section 4.7.2.9

± 0.5% @ unity power factor
± 0.5% @ 50% power factor

ANSI C37.90.1 - 1989
IEC 61000-4-4
ANSI C62.45 - 1992

2S CL200 5W
1S, 2S CL320, 12S, 25S 10W
3S CL20 1.2W
4S CL20 2.4W

Burden Data

Metrology Voltage Watt Loss VA

1S 120 0.45 3.7
2S Class 200 240 0.45 7.2
2S Class 320 240 0.65 10.2
3S 240 0.65 10.2
4S 240 0.65 10.2
12S/25S 120 0.65 5.4

240V

Register

Watt Loss 0.01 0.01 0.01 0.45 0.90 0.90
VA — — — 7.16 14.76 14.76

120V

Register

Watt Loss 0.01 0.01 0.01 0.28 0.90 0.90
VA — — — 2.4 11.1 11.1

Clock Cyclo LCD R300 Ce llNet D/T/L

Clock Cyclo LCD R300 Ce llNet D/T/L

120V Option Board R300CD

Watt Loss 2.2
VA 23

240V Option Board

Watt Loss 2.2
VA 42

1-6 CENTRON Meter Technical Reference Guide

Technical Data

Dimensions

General Information

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) + VA (Option Board)+=

Watt Loss (Meter) Watt Loss (Metrology) Watt Loss (Register) + Watt Loss (Option Board)+=

Meets applicable standards:

• ANSI C12.1-1995

• ANSI C12.1-1997

• ANSI C12.20 (Class 0.5) - 1998

• IEC 61000-4-4

• IEC 61000-4-2

The following dimensional measurements are shown in inches and (centimeters).

Figure 1.6 Dimensions

A B C D E

Polycarbonate

6.29 (16.00) 6.95 (17.70) 2.70 (6.90) 3.16 (8.00) 4.53(11.50)

Glass

6.42 (16.30) 6.95(17.70) 3.17 (8.10) 3.64 (9.20) 5.01 (12.70)

CENTRON Meter Technical Reference Guide 1-7

General Information

C1SD/C1ST/C1SL Dimensions

The following dimensional measurements are shown in inches and (centimeters).

Figure 1.7 C1SD/C1ST/C1SL Dimensions

ABCDEFGH

6.29 (16.00) 6.95 (17.70) 2.70 (6.90) 3.16 (8.00) 4.53(11.50) 4.98(12.70) 6.29(16.00) 6.95 (17.70)

Shipping Weights

Polycarbonate

The following weight measurements are shown in pounds and (kilograms).

Polycarbonate Glass

Meter 1.375 (0.623) 2.75 (1.247)

4 Meters and Carton 8.90 (4.04) 13.96 (6.35)

96 Meter Pallets 214 (97.30) 335 (152.30)

1-8 CENTRON Meter Technical Reference Guide

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.

• Save the original packing materials.

Battery

The lithium battery is soldered to the register module circuit board (C1ST and
C1SL only). A low-power mode for the battery preserves the capacity of the
battery. Factory-programmed C1ST and C1SL meters should be put into service in
a timely manner to avoid degradation of the battery. Programmed meters are not in
low-power mode.

Storage

The product you have purcha sed conta ins a recycl able lithi um battery. At the end of its
useful life, under various state and local laws, it may be illega l 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.

The C1SR also contains a tilt switch that may contain mercury. Please dispose of
properly.

Store the meter in a clean, dry (Relative Humidity < 50%) environment between

-40° C to +85° C (-40° F to +185° F). Avoid prolonged storage (more than one year)

at temperatures above +70° C(+158° F). Store the meter in the original packing
material. The lithium battery has a shelf life of approximately fifteen (15) years.

CENTRON Meter Technical Reference Guide 2-1

Installation

Unpacking

Selecting a Site

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.

The meter is designed and manufactured to be installed in an outdoor
environment, at operating temperature ranges between -40° C and +85° C (-40° F to
+185° 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, SchlumbergerSema recommends using either the C1ST or C1SL 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 (C1S D/T/L only).

• If the register only displays a Segment Test (all display items shown) and
flashes “CNTRON”, the register has not been programmed.

• Verify that no errors are displayed.

Programming the C1SD,T,L Meter

The personality module should be powered prior to programming. The module can
be programmed using the optical connector. The default communications rate
when programming through the optical tower is 4800 baud; 9600 baud is
selectable. Refer to PC-PRO+ documentation for detailed programming
information.

2-2 CENTRON Meter Technical Reference Guide

Retrofitting with Personality Modules

CENTRON meters can be upgraded to increase functionality by changing the
Personality Modules.

Do not power ON the meter without the inner cover in place. Power the meter OFF before
removing the inner cover. Personality modules are sensitive to ESD damage. Take
appropriate grounding measures before retrofitting!

To change or add a Personality Module:

1 Remove power from the meter.

2 Remove the outer (polycarbonate or glass) cover.

3 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 (see
Figure 2.1). The inner cover is held in place by four plastic tabs on the meter
base.

Installation

Figure 2.1 Removing the Inner Protective Cover

4Do one of the following:

• If a mechanical register is present, remove the two leads that connect the
register to the metrology board (see Figure 2.2).

Mechanical registers built after June 2000 have two individual connectors
that are removed by pulling away from the metrology board.

CENTRON Meter Technical Reference Guide 2-3

Installation

Two-Lead Connector

Figure 2.2 Removing the Two-lead Connector

• If an electronic register is present, remove the black board-to-board
connector between the circuit board and the metrology board by pulling it
by its middle while moving it side-to-side (see Figure 2.3). To maintain the
integrity of the connector, only remove it when you are upgrading the
meter.

Board-to-Board Connector

Figure 2.3 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 2.4) while lifting the module up.

2-4 CENTRON Meter Technical Reference Guide

Installation

Meter Snaps

Figure 2.4 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 2.5).

The module must be aligned properly in the snaps to avoid damaging the connector or circuit
board.

Figure 2.5 New Module Snap-in

CENTRON Meter Technical Reference Guide 2-5

Installation

7 Replace the board-to-board connector by aligning the top of the connector

with the notches in the circuit board (see Figure 2.6) and pressing gently at the
bottom of connector to mate the connector to metrology board (see Figure

2.7). Then, gently press the top of the connector to mate it to the register

module (see Figure 2.8). The connector is seated correctly when you hear it
snap into place.

Notches (2)

Figure 2.6 Circuit Board Notches

Be sure to use the meter base for leverage instead of the LCD holder (see Figure 2.7). Pressure
on the LCD holder may damage the personality module.

Figure 2.7 Board-to-Board Connector, Bottom

2-6 CENTRON Meter Technical Reference Guide

Installation

8 Ensure the board-to-board connector is fully seated by pressing firmly in on

the middle of the connector.

Figure 2.8 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 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. If the Demand Reset plunger is not in the retracted position
before turning the outer cover, the mechanism may be damaged.

CENTRON Meter Technical Reference Guide 2-7

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. 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

Where

i

is the biasing current (derived from the line voltage)

b

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 SchlumbergerSema for the CENTRON meter.

For the metering application, the biasing current i
generated from the line voltage (V) using a resistor (R).

created at the output of the Hall device:

out

V

KibB×=

out

applied to the sensor is

b

VR⁄=

i

b

The magnetic field (B) is generated by the line currents (I = I

+ I2) that flow

1

through two conductors looped around the core.

B CI× CI1I2+()×==

Where

C is a constant that is dependent upon the geometric and magnetic properties
of the coil

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 Figure 3.1).

CENTRON Meter Technical Reference Guide 3-1

Operation: Base Metrology

The output voltage of the Hall Effect device is then:

V

V=out GIV GPower==

hall

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).

i

b

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).

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
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. All the
processing steps described above are integrated into a SchlumbergerSema
Application Specific Integrated Circuit (ASIC) to improve reliability and reduce
cost.

3-2 CENTRON Meter Technical Reference Guide

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.

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.
SchlumbergerSema 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 register 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 following signals to the personality module attached to the meter
base:

• When a cyclometer or clock register is used, the motor pulse signals drives the
single pole stepper motor.

• When an electronic module is used, the Wh pulse, energy direction, and 60Hz
clock are provided by the metrology. 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 Meter Technical Reference Guide 3-3

Operation: Base Metrology

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 in this chapter.

The major difference with these metering forms is the presence of two Hall cells,
magnetic cores, and ADCs (see Figure 3.3).

For these metering applications, the biasing current Ibias (I
each sensor is generated from the line voltage (V
magnetic field is generated by the line current (I
conductor looped around each core. The voltage (V
each Hall Effect device is proportional to the watts produced by each phase.

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.

line1

line1

and V

and I

and V

out1

and I

bias1

) using a resistor. The

line2

) that flows through the

line2

) that is formed on

out2

) applied to

bias2

Figure 3.3 Hall Cells and ADCs

3-4 CENTRON Meter Technical Reference Guide

Chapter 4 Operation: C1S Version

The kWh only version of the CENTRON meter is available with one of three
personality modules to register energy accumulation:

C1S Clock Register

Physical Description

C1S Cyclometer Register

Figure 4.1 C1S Personality Modules

All three modules are interchangeable and may be ordered with a 5x1 or 4x10
register for self-contained meters, and a 5xTR or 4xTR register for transformer­rated meters.

The kWh only version of the CENTRON 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.

The CENTRON Personality Modules snap into the meter register mounting
brackets to ease installation of the board.

The clock and cyclometer modules are connected to the metrology board via a
two-wire connector that easily attaches to the edge of the metrology board (see
Figure 4.2). Clock and cyclometer modules manufactured after June 2000 are
attached via two individual connectors. A pulse is sent every 10 watthours from the
metrology board to these modules. This pulse drives the electromechanical
stepper motor which, in-turn, drives the movement of the clock or cyclometer
dials. A test dial is located above the two right meter dials on every clock module.
One revolution of the test dial is equivalent to 1 kWh.

C1S LCD Register

CENTRON Meter Technical Reference Guide 4-1

Operation: C1S Version

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:

• Line 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.

Registers

Kilowatt Hours

Figure 4.2 Mounted Clock and LCD Registers

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. Programmed at the factory, this feature will
cease registration while the meter is inverted, or power flow is otherwise reversed.

4-2 CENTRON Meter Technical Reference Guide

Resetting Values

Operation: C1S Version

The pointers on the clock module are spring fitted to their staffs and can be easily
repositioned to reset the register (see Figure 4.3).

Figure 4.3 Clock Register

To reset the cyclometer register dials:

1 First move the spring-loaded wire off of the hook that holds it in place.

When the hook is in place, it puts tension on the individual cyclometer dials.
After moving the wire off of its hook, a washer that helps to hold the dials in
place will be free to move on the dial axle.

2 At that point, move all of the dials to the left (as viewed from the front of the

cyclometer). From right to left, one by one, move each dial to zero.

3 After each dial is set to zero, press it to the right and hold all zeroed dials in

place. They will interlock with each other and will not move.

4 After resetting each dial to zero, keep the dials locked together, move them to

the right side, and reset the spring-loaded wire to its hooked resting place.

5 Be sure to secure the washer against the left-most dial with the hinge by

replacing the spring-loaded wire on the left side of the washer.

At that point, the spring-loaded wire will place tension against the washer and dials
and the cyclometer will be ready to operate again.

CENTRON Meter Technical Reference Guide 4-3

Operation: C1S Version

The ZRO-C2A (see Figure 4.4) resets the energy register through a direct
connection to the connector at the 12 o’clock position on the LCD and R300
modules.

Figure 4.4 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 (C1SR). The
ZRO-C2A also resets the tamper indicators in the C1SR.

The ZRO-C2A requires that the meter Not Be Powered. 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 (see Figure 4.4). 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 C1SR 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.

Use of a ZRO-C or ZRO-C2 resett er without the C 2A upgrade WILL CAUSE DAM AGE to
the personality modules on both the C1S LCD and C1SR me ters produc ed after the ne w
EEPROM implementation date; damaged modules will show “Error” on the display.

4-4 CENTRON Meter Technical Reference Guide

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 4.5
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 4.5 Reverse Side of ZRO Resetter

LCD Display Function

Two separate versions of the LCD are available. Both versions may be configured
for either four or five digits and will roll over at 100,000 KWh. The LCD is
automatically adjusted for contrast over the operating temperature range.

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 (see
Figure 4.6). 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.



kWh T

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). The display scrolls between the kWh reading and
segment check with 7 seconds of on-time for each display item.

CENTRON Meter Technical Reference Guide 4-5

Operation: C1S Version

Stepper Motor Revision



kWh TTT

Figure 4.7 LCD Display with Segment Check

The three triangle segments in the bottom right corner of the display represent a
watt disk emulator. This electronic load indicator will advance with each pulse,
since each pulse is equivalent to one watthour. Reverse power is indicated by a
reversal in the direction of the electronic load indicator.

As of May 2000, the stepper motor connector on the CENTRON C1S Clock and
Cyclometer personality modules, as well as the mating connection point on the
metrology board was revised. This revision, as shown in Figure 4.8 below, will
increase accessibility when removing or installing the registers.

Connection to metrology with white
connector (used prior to May 2000)

Figure 4.8 Stepper Motor Connections

When replacing the stepper motor, be sure to order the proper motor for your
configuration.

Connection to metrology with two separate
leads (used from May 2000 to present)

4-6 CENTRON Meter Technical Reference Guide

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 5.1 C1SL Meter with Cover

These personality modules utilize the SCS protocol which allows the C1SD, C1ST,
and C1SL meters to mimic the SchlumbergerSema 200 Register Series product line
for use with existing systems.

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. The TOU and load profile
modules contain a battery that maintains the clock circuitry during a power
outage.

• Optical Port Communication—Each module can be programmed to
communicate 9600 or 4800 baud through the optical tower.

• 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.

CENTRON Meter Technical Reference Guide 5-1

Operation: C1SD, C1ST, and C1SL Versions

• 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. When the meter is programmed with electronic detent, both the forward
kWh register and the reverse kWh register will be utilized. When the meter is
programmed to be undetented, the forward and reverse energy will
accumulate in the forward kWh register.

The C1SD, C1ST, C1SL modules are available with an LCD display and a
polycarbonate cover. The cover contains the optical port adapter and demand
reset button.

Controls and Indicators

All controls and indicators are shown in Figure 5.2. For detailed instructions about
a feature or control, refer to the appropriate subsection.

Magnetic Reed Switch

Test LED

Modes of Operations

LCD Display

Test Mode Switch

Optical Tower

Annunciators

Demand Reset

Figure 5.2 C1SL Controls

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.

The C1SD, C1ST, and C1SL modules each have three modes of operation:

•Normal

•Alternate

•Test

5-2 CENTRON Meter Technical Reference Guide

Normal Mode

Alternate Mode

Operation: C1SD, C1ST, and C1SL Versions

In Normal mode, the module display automatically sequences through the
programmed displays and annunciators in the programmed sequence. Each
parameter is displayed for the program-specified period (from 1 to 15 seconds),
followed by a blank display for one second. Only the annunciator appropriate to
the selected module display can appear while its data is displayed. Each display
can have a two-digit identifier. If selected, this code can be programmed to be any
number from 00 to 99.

Calculations are performed to obtain programmed quantities. Specific details of
the calculated values are covered under Programmable Functions in this section.
The meter will continue to operate in Normal mode until power is disconnected,
the Alternate display sequence is initiated, Test mode is selected, or an error
condition occurs.

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 and is activated using either the magnetic reed switch
or a meter programming device. To activate the Alternate mode using the magnetic
reed switch, move a small magnet (approximately 30 gauss) near the reed switch
located at the 10 o’clock position on the side of the module (see Figure 5.2). The
magnetic reed switch can be accessed with the meter cover in place. To activate
the Alternate mode with a programming device, refer to the PC-PRO+
documentation. Immediately upon activation, Alternate mode is indicated by a
flashing ALT annunciator. The ALT annunciator will not appear if there are no
Alternate mode display items programmed.

Once the Alternate mode has been selected, the display will sequence once
through the alternate program items and return to the Normal display sequence.
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 a two-digit identifier, programmable from 00 to 99. The
calculations and operations performed in Alternate mode are identical to those in
Normal mode.

Test Mode

Selecting the Test mode causes the current interval demand to be compared to the
stored maximum demand and the current billing data to be transferred to non­volatile memory. If the current interval demand value is greater than the maximum
demand, the current interval demand becomes the maximum demand. All Test
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.
Immediately upon activation, the Test mode is indicated by a flashing “TEST”
annunciator in the lower left hand corner of the module display. The TEST
annunciator will not appear if there are no Alternate mode display items
programmed.

CENTRON Meter Technical Reference Guide 5-3

Operation: C1SD, C1ST, and C1SL Versions

Refer to the PC-PRO+ documentation for information on selecting the Test mode
using a programming device. A programmable “Time-Out Length” from 1-to-99
minutes is available. After the programmed Time-Out Length has ended, the
register will automatically exit the Test mode. The demand test interval is
initialized whenever the Demand Reset button is pressed.

The magnetic reed switch, when activated, advances the Test mode display to the
next quantity. Calculations performed in Test mode are performed in the same
manner and based on the same program parameters as in Normal mode with the
exception of interval (subinterval) length. Test mode interval length and the
number of subintervals are specified independently for Test mode. The results are
displayed according to the display configuration selected when the register is
programmed. To exit the Test mode and return to the Normal mode, do one of the
following:

• De-energize the meter.

• Push the Test mode button.

• Wait for the selected Test mode time-out to occur.

Calculated values performed in Test mode are not added to previous billing values
or stored for retrieval. After exiting Test mode, all billing data previously
transferred to nonvolatile memory is retrieved, an End of Interval (EOI) is
initiated, and a new demand interval begins.

Any time-dependent events such as rate switches, self-read, or daylight savings
time that occur while the meter is in Test mode are performed when the Test mode
is exited.

Test Mode Switch

Figure 5.3 Test Mode

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.
While the module is on battery carryover, the display will show “on battry” while
the power is off. This can be observed by viewing the display at an angle at close
range.

5-4 CENTRON Meter Technical Reference Guide

Displays

Operation: C1SD, C1ST, and C1SL Versions

Low power mode can be verified in one of the following ways:

• By observing that the minutes on battery counter does not increase during a

power outage.

• By observing the display during a power outage (from close range at an angle)

and verifying that the display does not show “on battry”.

See "Three Button Reset" on page 5-24 for instructions.

A nine-digit liquid crystal display, with a variety of annunciators, is provided on
these multifunction personality modules (see Figure 5.4).

Figure 5.4 Display

Six large digits are available to display all billing and informational data. Three
decimal points are provided for programmable resolution of billing data.

Three small digits in the upper left-hand corner of the display are used to provide
code numbers to identify any display item. These three digits are used along with
the six data digits to display ID numbers such as the meter serial number and user
fields.

There are three triangle segments in the bottom right corner of the display that
represent a watt disk emulator. This electronic load indicator will advance with
each pulse, since each pulse is equivalent to one watthour. Reverse power is
indicated by a reversal in the direction of the electronic load indicator.

Directly below the three code number digits is the Test mode annunciator (TEST).
This annunciator will flash on and off once per second whenever the meter is in
Tes t mo d e.

On the far left of the bottom line is the Alternate mode annunciator (ALT). This
annunciator will flash on and off once per second whenever the meter is in
Alternate mode.

To the right of the Alternate mode annunciator are the TOU rate indicators (A, B,
C, D, Total). These indicators correspond to the four programmable TOU and
TOTAL rate. The TOU rate indicators can be programmed to be displayed with the
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.

The EOI annunciator is located to the right of the kWh annunciator. This
annunciator will turn on for four seconds at the end of each demand interval (or at
the end of each subinterval when rolling demand is used).

CENTRON Meter Technical Reference Guide 5-5

Operation: C1SD, C1ST, and C1SL Versions

Programmable Functions

The CENTRON can be programmed using SchlumbergerSema’s programming
software: PC-PRO+ or PC-PRO+ 98.

Table 5.1 describes each display item and indicates the display mode in which each
is available. The display items and sequence of their display, along with any desired
annunciators or Identification (ID) code numbers, are selected during the
programming process. Detailed information on these display items can be found in
the PC-PRO+ documentation.

kWh xxx
Maximum kW Demand x x x
Cumulative kW Demand x x
Continuous Cumulative kW Demand x x

Table 5.1 LCD Display Items

Display Mode

Display Item Normal Alternate Test

Previous Interval kW Demand x x x
Self Read kWh x x
Self Read kW Demand x x
Last Season Billing Values (TOU only) x x
Present Interval Demand kW Demand x x
Segment Test x x
Time Remaining in (Sub) interval x x
Meter ID (up to two 9-digit fields) x x
User Defined Fields (up to three 9-digit fields) x x
Firmware Version x x
Software Version x x
Number of Times Programmed x x
Number of Demand Resets x x
Number of Power Outages x x
Number of Days Since Demand Reset x x
Demand (Sub) interval Length x x
Register Full Scale Value x x
Kh Value x x
Demand Threshold Value x x
P/DR Value x x

5-6 CENTRON Meter Technical Reference Guide

Operation: C1SD, C1ST, and C1SL Versions

Table 5.1 LCD Display Items

Display Mode

Display Item Normal Alternate Test

Register Multiplier x x
Date (C1ST and C1SL version only) x x
Time (C1ST and C1SL version only) x x
Day of Week (C1ST and C1SL version only) x x
Date of Last Reset (C1ST and C1SL version only) x x
Time of Last Reset (C1ST and C1SL version only) x x

Register Display Options

Time on Battery Carryover (min) (C1ST and C1SL
only)

Program ID Number x x
TOU Schedule ID (TOU only) x x
Input Pulse Count x
Previous Interval Pulse Count x
Time Remaining in Test Mode x

xx

All calculated billing quantities to be displayed are specified through the
programming software. The following billing quantities are available for display in
the Normal and Alternate modes:

•kWh

• Received kWh

• Max kW Demand

• Cumulative kW Demand

• Continuous Cumulative kW Demand

• Previous Interval kW Demand

•Self-read kWh

• Self-read kW Demand

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 4 Digits 5 Digits 6 Digits

X.XXX XX.XXX XXX.XXX

X.XX XX.XX XXX.XX XXXX.XX

Demand

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*

CENTRON Meter Technical Reference Guide 5-7

Operation: C1SD, C1ST, and C1SL Versions

Table 5.2 Register Display Formats

3 Digits 4 Digits 5 Digits 6 Digits

Energy XX.X

XXX

*indicates floating decimal point format

XXX.X

XXXX

XXXX.X

XXXXX

XXXXX.X

XXXXXX

Self Reading

The C1SD is capable of storing one block of self-read data consisting of kWh and
maximum kW. The TOU versions, the C1ST and C1SL, will store one block of self
read data consisting of kWh and kW for all rates when a self-read is performed.
Self-read data is displayable in Normal or Alternate mode.

A self-read 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 (C1ST and C1SL 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 at 00:00 hours, register
readings are transferred to nonvolatile memory.

If desired, an automatic demand reset can be performed after this self-read.

Only the first 28 days of the month can be selected since February has only 28 days.

• Read on a programmable number of days since the last manual or automatic
demand reset (C1ST and C1SL only). If the selected number of days (1 to 150)
passes without a demand reset, a self-read is initiated.

If desired, an automatic demand reset can be performed after this self-read.

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.

Operating Parameters

Programmable parameters establish the meter's configuration and define its
operation in Normal, Alternate, and Test modes (see Table 5.3). Only parameters
specific to the Test mode are displayable in Test mode. Parameters that can be
uploaded using a reading device, but cannot be displayed on the meter are
indicated with an asterisk.

5-8 CENTRON Meter Technical Reference Guide

Operation: C1SD, C1ST, and C1SL Versions

Table 5.3 Programmable Parameters

Parameter Description

Display Scroll Time *

Cold Load Pickup Time *(CLPU)

Power Outage Length Prior to CLPU *

Normal Mode Demand Interval Length

Test Mode Demand Interval Length*

Normal Mode Number of Subintervals*

The number of seconds (1 to 15) that each item is to be
displayed before the next item appears.

The number of minutes (0-255) before demand
calculations are restarted after a recognized power
outage occurs. Setting this value to zero will cause
demand calculations to start immediately following a
power outage.

The number of minutes (0 to 255) that power must be
out for the CLPU to take effect. Defining this value as
zero will cause CLPU to be activated after any
recognized power outage.

The time in minutes (1 to 60) that each demand interval
lasts before a new interval begins. Valid interval lengths
are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60 minutes.

The time in minutes (1 to 60) that each Test mode
demand interval lasts before a new interval begins. Valid
interval lengths are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30,
and 60 minutes.

The interval length divided by the sub-interval length is
equal to the number of subintervals. Valid entries are
from 1 to 10 and must be evenly divisible into the
demand interval length. For block demand, the number
of subintervals is 1.

Test Mode Number of Subintervals*

Register Full Scale

Test Mode Timeout

Operating Frequency*

Line or Crystal Sync*

The interval length divided by the sub-interval length is
equal to the number of subintervals. Valid entries are
from 1 to 10 and must be evenly divisible into the
demand interval length. For block demand, the number
of subintervals is 1.

A kW demand value that defines the maximum rated
demand for a particular meter installation. Valid entries
range from 0 to 999999.

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.

The operating frequency must be programmed to 50 Hz
or 60 Hz line operation.

The real time clock can be synchronized off the input line
frequency or the internal crystal.

CENTRON Meter Technical Reference Guide 5-9

Operation: C1SD, C1ST, and C1SL Versions

Register Multiplier

Table 5.3 Programmable Parameters

Parameter Description

A programmable value that is used in calculations of
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 for primary read meters.
Valid entries are from 1 to 9999.

Note: Energy and demand display formats should be
adjusted accordingly.

Optical Communications Baud Rate*

Expansion Port Comm. Baud Rate*

*Indicates parameters that can be uploaded to a reading device but cannot be displayed.

The optical communications default baud rate is 4800
baud, however, a rate of 9600 baud is selectable.

The expansion port communications default baud rate is
2400 baud; however, rates of 300, 1200, 2400, 4800,
and 9600 baud are selectable.

Informational Data

The following items are for information purposes (see Table 5.4). All informational
data, except those items indicated by an asterisk, can be displayed in Normal and
Alternate modes.

Table 5.4 Information Data Items

Item Description

Time and Date of Maximum Demands
(C1ST and C1SL only)

Time Remaining in (Sub) interval

Segment Test

The time and date that each maximum demand occurred
for A, B, C, D and Total Rates.

The amount of time in minutes and seconds before the end
of the current demand interval.

The display illuminates all segments and selected
annunciators on the LCD in order to verify proper operation.
The watt disk emulator continues to function normally.

Two separate nine digit display items that can be used to

Meter ID Numbers 1 and 2

User Fields

Firmware Revision

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.

Up to three separate user fields are available to display any
desired numerical information. Each user field can be up to
nine digits in length with an alpha character displayed as a
dash, a space displayed as a blank, and a number
displayed as the appropriate value.

A sequential number identifying the firmware revision level
of the meter. This number is automatically provided and
does not require operator input.

5-10 CENTRON Meter Technical Reference Guide

Software Revision

Operation: C1SD, C1ST, and C1SL Versions

Table 5.4 Information Data Items

Item Description

A sequential number identifying the revision level of the
software used to program the meter. This number is
automatically provided by the programming software and
does not require operator input.

Number of Times Programmed

Number of Power Outages

Number of Demand Resets

Number of Days Since Demand Reset
(C1ST and C1SL only)

Date and Time of Last Reset (C1ST and
C1SL only)

Date and Time Last Programmed (C1ST
and C1SL only)

Date (C1ST and C1SL only) The current date recognized by the meter

Time (C1ST and C1SL only)

Day of Week (C1ST and C1SL only)

A counter identifying the number of times (up to 9999) the
meter has been programmed.

A counter identifying the number of times (up to 9999) the
meter has recognized a power outage.

A counter identifying the number of times (up to 9999) a
demand reset has occurred.

A counter identifying the cumulative number of in service
days since the last demand reset.

The date and time of the last demand reset.

The date and time the meter was last programmed.

The current time recognized by the meter.
Note: For time of occurrence registers, time is displayed as

HH:MM:SS. All dates are displayed in the format chosen in
the programming software.

A single digit denoting the current day of the week is
displayed where Monday is denoted by a one and Sunday
by a seven.

Time on Battery (C1ST and C1SL only)

Program ID Number

TOU Schedule ID Number (C1ST and
C1SL only)

TOU Expiration Date *

Register Full Scale Value

Demand Threshold Value

Mass Memory Size * (C1SL only)

Note: * Indicates parameter that can be uploaded to a reading device but cannot be displayed.

A counter identifying the cumulative number of minutes, 0
to 999,999, the meter has been in battery carryover mode.

A three digit number identifying the program downloaded to
the meter.

A three digit number identifying the TOU rate schedule
downloaded to the register.

A date that indicates when the register’s TOU schedule will
no longer be valid.

A kW demand value that represents the maximum rated
demand for a particular meter installation. Exceeding this
value triggers error code 100000.

A programmed threshold value in kW that determines when
the demand threshold output turns on.

The amount of mass memory actually being used for
recording of interval data. Valid entries are 0 to 32K, in 8K
increments.

CENTRON Meter Technical Reference Guide 5-11

Operation: C1SD, C1ST, and C1SL Versions

Test Mode Data

The following items shown in Table 5.5 can be displayed in Test mode.

Table 5.5 Test Mode Data Items

Item Description

Time Remaining in the (Sub) interval

Maximum kW

Previous kW

Input Pulse Count

Previous Interval # of Input Pulses

KWh The energy accumulated in Test mode.

Present (Accumulating) kW

Time Remaining until Test Mode
Timeout

The amount of time in minutes and seconds before the end
of the current Test mode demand interval.

The maximum demand since the meter was put into T est
mode. This value will be set to zero each time a demand
reset is performed.

The kW demand of the previous Test mode subinterval/
interval.

The number of pulses that have been received since the
last reset in Test mode.

Note: The display will be updated with each input pulse.
The number of pulses received during the last complete

interval or subinterval in Test mode.

The calculated demand value as it increases from the start
of a demand test interval to the end of the subinterval/
interval.

The amount of time in minutes and seconds before the
programmed Test mode timeout counter will expire.

5-12 CENTRON Meter Technical Reference Guide

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.

2Select File | Export.

The Export screen shown in Figure 5.5 is displayed.

Operation: C1SD, C1ST, and C1SL Versions

Figure 5.5 Program File Export

3 Select the 200 Series program to export from the list of available Programs.

4Click OK.

The Program File Export Type screen is displayed.

Figure 5.6 Program File Export Type

5Select CENTRON export format as shown in Figure 5.6 above.

6Click 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.

CENTRON Meter Technical Reference Guide 5-13

Operation: C1SD, C1ST, and C1SL Versions

7Select File | Import.

The Import screen shown in Figure 5.7 is displayed.

8 Select the CENTRON program to import from the list of available EXP files.

9Click OK.

The program is loaded into the Program Editor. Edit as necessary before
saving and using to program the meter.

Figure 5.7 Import Screen

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.

• The current maximum demand values are added to the corresponding
Cumulative Demand values.

• A self-read is performed (if selected).

• All Maximum Demand values are reset to zero. All corresponding times and
dates of maximum demands are cleared (C1ST and C1SL 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 (C1ST and C1SL 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, additional manual demand resets are prevented for 60
seconds following a demand reset.

When a demand reset is performed on a meter programmed for Block Demand, the current
interval becomes the first interval in the next billing period. For Rolling Demand, all previously
completed subintervals are zeroed. The current subinter val becomes the first subinte rval in t he
next billing period. In Test mode, a demand reset will initialize the demand test interval.

5-14 CENTRON Meter Technical Reference Guide

Time-of-Use

TOU Schedules

Calendar Schedule

Operation: C1SD, C1ST, and C1SL Versions

The Time-of-Use capability is available on the C1ST and C1SL personality modules.
It requires additional circuitry to store TOU schedule information and a battery for
time-keeping purposes during power outages. Schedule information is
programmed on a PC using the PC PRO+ 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.

The calendar schedule contains all daily and yearly information necessary to
perform TOU metering. This schedule contains rate schedules, daily schedules,
seasons, holidays, and daylight savings time dates. For information on the entry of
these parameters into PC-PRO+, refer to the PC-PRO+ documentation.

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. Each schedule defines the beginning and
ending time of each of the four available rate periods (A, B, C, and D). Up to 32
switch points per rate may be specified for each daily schedule.

Weekdays, Saturday, Sunday, and holidays can be assigned to one of the four daily
schedules. Therefore, one to four daily schedules may be used in any combination
with the days of the week.

Seasonal Schedules

A season is a period of continuous days during the year when a particular rate
schedule is in effect. The year can be divided into a maximum of eight seasons. If
multiple seasons are not used, the TOU schedule contains one year-round season.
The Daily Schedules can be defined differently for each season. Up to eight Season
Change dates are specified for each year in the Calendar Schedule.

Season changes occur at midnight of the Season Change date (where midnight
corresponds to 00:00 hours) or can be programmed to occur at the first demand
reset following the Programmed Season Change date.

Holiday Schedules

Up to twenty-two holidays can be designated per year in the Calendar schedule.
One of the four Daily schedules is assigned to each of the Holidays in the Calendar
Schedule.

CENTRON Meter Technical Reference Guide 5-15

Operation: C1SD, C1ST, and C1SL Versions

Daylight Savings Time

Daylight Savings Time switch points occur at 2:00 A.M. on the first Sunday in April
and the last Sunday in October. These dates are pre-assigned in the Calendar
Schedule; however, they can be modified by the user. The user can also elect not to
recognize Daylight Savings Time and operate the meter in standard time only.

Registers

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 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

At the end of a specified season, all Last Season Registers are updated with
Current Season register data. The meter can be programmed to activate an
automatic demand reset at a season change. A season change can be programmed
to occur at midnight at the beginning of the programmed Season Change date or at
the first demand reset following the Season Change date.

Season Change

The following events take place when an automatic demand reset occurs at season
change:

• The Current Season energy registers are copied directly to the Last Season
energy registers.

• The Current Season maximum demand registers are copied directly to the Last
Season maximum demand registers and added to the cumulative demand
registers.

• After the demand reset, the maximum demand registers are reset to zero. Both
the cumulative and the continuous cumulative demand registers are copied to
the Last Season cumulative and continuous cumulative demand registers,
respectively.

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.

5-16 CENTRON Meter Technical Reference Guide

Load Profile Specifications

Capacity

The C1SL module provides 32k bytes of EEPROM for one channel of interval load
profile data. The amount of installed EEPROM actually used for load profile
recording is programmable from 1 to 32k bytes in one kbyte increments.

34 bytes of the 32k bytes is reserved for firmware and software parameters.

Bit Resolution

The mass memory is configured for 12 bit data resolution. Equivalent pulse count
resolution per interval is as follows:

Bits = 12
Pulse Counts = 4096

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.

Operation: C1SD, C1ST, and C1SL Versions

Power Outage

Channel Configurations

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.

The Load Profile register has one channel of interval load profile data. This
channel corresponds to kWh. The pulse constant is programmable from 0.02 to
99,999 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



------------------------------------



disk revolution

4 pulses



------------------------------------

⁄==



disk revolution

CENTRON Meter Technical Reference Guide 5-17

Operation: C1SD, C1ST, and C1SL Versions

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 12-bit data resolution is desired
for 15 minute intervals.

First, calculate the maximum watthour accumulation during 15 minutes intervals:

The maximum number of pulses is 4095; therefore, the smallest pulse weight (PW)
that can be used is:

Wh Max, 240volts 200A 1phase 0.25×××=

Wh Max, 12 000 watt hour s,=

PW

1.8 watt hours

----------------------------------

=

pulse

Data Storage

PW Min,

12 000Wh,

---------------------------

==

4095P

2.94Wh

------------------­Pulse

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. The mass memory is grouped into
segments of sixty intervals defined as a record or block. In addition to the profile
data, each record contains the following information:

Time Tag

Power Outage

Status Bits

Time Adjust

Saturation

RAM Error
Field Test Status bit is set if Test mode is activated during an interval.

Register Readings

Specifies the month, day, and hour of the end of the data
record (or block).

Status bit is set for each interval during which a power
outage occurs (interval status).

There are four types of status bits written into each data
block:

Status bit set along with power outage bit when time is
adjusted with Load Profile running.

Status bit is set when the pulse count for any interval in
the block exceeds 4,095 pulses.

Status bit is set if any memory address within the record
fails the memory check (block status).

A register reading is maintained in the data record to be
used for data validation. This register reading is updated
at the end of each interval.

5-18 CENTRON Meter Technical Reference Guide

Recording Duration

Operation: C1SD, C1ST, and C1SL Versions

Use the following equation to determine the recording duration for the load profile
register:

Duration (days)

M= Memory size in kilobytes

I = Interval Length in minutes

Truncate all decimals before multiplying by I/24.

Table 5.6 Recording Duration for 32Kb

Interval Length (min)

1 12.75
2 25.50
5 63.75

10 127.50

M1024×

----------------------­107

I

----- -

×=

24

Recording Duration

(days)

Optional Features

Electronic Detent

Expansion Port

Security Codes

15 191.25
30 382.50
60 765.00

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.

A connector located on these personality modules provides the option of using
expansion modules (when available), such as the R300CD board in conjunction
with the C1SD, C1ST, and C1SL personality modules.

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

CENTRON Meter Technical Reference Guide 5-19

Operation: C1SD, C1ST, and C1SL Versions

demand reset and 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.

Calculations

Energy

Calculation of energy is continuously incremented by multiplying the energy pulse
weight by the measured energy. The energy pulse weight is calculated by the
following formula:

The energy in a given interval is the product of the number of pulses received
during that interval times the pulse weight:

kWh Pulse Weight

kwh



--------------



Pulse

Kh 1000× Register Multiplier==

Demand

kWh



Energy kWh()Number of Pulses

--------------

×=



Pulse

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



kW pulse weight

--------------



pulse

Kh 1000 Register Multiplier 60/Dem. Int. Length××⁄=

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 kW Pulse Weight×=

5-20 CENTRON Meter Technical Reference Guide

Operation: C1SD, C1ST, and C1SL Versions

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 is discarded. At the beginning of an interval, the current
interval demand is reset to zero and new demand values begin accumulating.

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. C1SD will begin a new demand interval. New maximum
demand values are calculated.

Rolling Interval Demand

For rolling interval demand, the programmed number of subintervals make up the
demand interval. At the end of every subinterval, the microprocessor calculates a
demand value based on the last full demand interval. When a demand reset occurs,
all Maximum Demands are reset to zero along with all completed subintervals. The
current subinterval continues (unless C1SD) accumulating data and the new
maximum demand value(s) is (are) calculated for the next subinterval.

Cumulative Demand

When a demand reset is performed, Maximum Demand values are added to the
existing corresponding Cumulative Demand values and written into memory as the
new Cumulative Demand values. These values remain in storage until the next
demand reset.

Continuous Cumulative Demand

Continuous Cumulative Demand is the sum of Maximum and Cumulative Demand
at any time. The calculated interval demand is continuously compared to the
previous Maximum Demand. If this demand is a new peak, it is stored as a
Maximum Demand and adjusts the continuous cumulative register to reflect the
new demand. A demand reset signal clears the Maximum Demand value, but does
not affect the Continuous Cumulative reading.

Previous Interval Demand

Previous interval demand is the calculated demand from the most recently
completed demand interval. When using rolling interval demand, this quantity is
updated after each subinterval. Previous interval demand is not saved in non­volatile memory. When an interval is completed the demand value is transferred to
the previous interval demand register for display. Upon power up or demand reset,
the previous interval demand register is set to zero and is updated when the first
subinterval is complete.

CENTRON Meter Technical Reference Guide 5-21

Operation: C1SD, C1ST, and C1SL Versions

Present Interval Demand

The present interval demand value is the demand value at the present time
normalized to the demand interval length. Present demand reports the calculated
demand value as it increases from the start of a demand interval to the end of the
interval. For rolling demand intervals, present demand reports the calculated
demand value from the present subinterval as it is accumulating with the previous
set of subintervals.

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.

DO NOT REMOVE THE ELECTRONICS’ HOUSING WHILE THE METER IS POWERED. LINE
LEVEL VOLTAGES ARE PRESENT ON THE CIRCUIT BOARD. FAILURE TO FOLLOW THIS
PROCEDURE COULD RESULT IN SERIOUS PERSONAL INJURY OR DEATH. THE
WARNING LABEL SHOULD ALWAYS BE VISIBLE ON THE HOUSING.

Battery Life (Load Profile & TOU)

The CENTRON TOU and Load Profile personality modules have a permanently
soldered battery present on their circuit boards. This battery powers the clock
when power is disconnected from the meter. The module program is transferred to
EEPROM for recall when power is restored.

The battery life is longer for the CENTRON TOU and Load Profile modules than
the J5 200 Series electromechanical hybrid meters. The capacity of the new battery
is larger than equivalent older products, and the current consumption is reduced
with new electronics technology.

In the process of determining this factor, battery life calculations are made
assuming worst case conditions for both the battery capacity (at the lowest end of
the manufacturer published initial limit) and the meter current consumption
(assuming all the components are at the maximum side of their published
tolerance).

The battery is also assumed to be operating at a self-discharge rate equal to a
constant average temperature of 160°F. At this temperature the battery will lose 2%
of its capacity per year (see dashed curve in Figure 5.8).

The design assumes that a significantly higher average temperature would increase
the self-discharge and that a lower average temperature would lower the self­discharge.

The battery technology used is Lithium Thionyl Chloride. The battery life
calculations use a safety factor that takes into account the increase in battery
internal resistance as it approaches its end of life. This increase in internal
resistance occurs before the battery voltage starts decreasing under open circuit
conditions. This 80% limit for the maximum capacity usage is factored into the
design.

5-22 CENTRON Meter Technical Reference Guide

Operation: C1SD, C1ST, and C1SL Versions

Classical observation of the open circuit voltage would lead to an overly optimistic
battery life and the likelihood of product failure before the detection circuit
tripped. SchlumbergerSema believes this is a major improvement in design
robustness to classical voltage detect circuitry and will avoid misleading
diagnostics.

The curve in Figure 5.8 shows the CENTRON battery usage in amp-hours for the
chosen scenario. The total time over the 15-year life of the product takes a battery
carryover (no power applied) of 1 year (cumulative) and is shown as the initial
year on the graph. In reality, it will likely be spread over the life of the product.
Figure 5.8 shows there is significant margin available for the “on power operation”
at 15 years, even at the 80% limit curve (historically, the low battery would be
flagged at the battery capacity line). When 20% of the battery capacity remains, the
internal resistance starts increasing exponentially, and the current characteristics
of the battery degrades as can be seen from the chart.

With the assumption that the “low power mode” is used when the meter is not in
field operation (entered from a three button reset), the current drain from the
battery has the same value as the current drain under AC power which means an
increase to the battery life.

Meters shipped from the factory unprogrammed or meters removed from the field and given a
3-button reset will not use battery carryover time.

A register displays the Low Battery error code (Er 000001) if the minutes-on­battery counter exceeds 525,600 minutes (1 year). The battery is no longer good
when the Worst Case Battery Usage line crosses the 80% maximum usage line.

This means that the battery life for the CENTRON is a conservative estimate of 15
years with or without the 365 days (12 months) of continuous carryover.

CENTRON Meter Technical Reference Guide 5-23

Operation: C1SD, C1ST, and C1SL Versions

Three Button Reset

Figure 5.8 Battery Life Calculation

To perform a three button reset, follow these steps:

Performing a three button reset returns selected program parameters to a default state.

1 Remove power to meter.

2 Remove the meter cover.

3 Activate the magnetic reed switch using a small magnet positioned at the 10

o’clock point of the meter.

4 Depress the test mode button and the demand reset button.

5 Apply power to the meter while simultaneously performing steps 3 & 4.

6 Remove the magnet; release the test mode and demand reset buttons after 3

seconds.

7 The meter display should alternate between CNTRON and Segment Test if

the reset is successful.

8 Replace the meter cover.

5-24 CENTRON Meter Technical Reference Guide

Option Boards

CENTRON R300CD Operation

The R300CD option provides two RF transmission messages for energy and
demand readings. It is programmed with two unit ID’s, one for identifying energy
(kWh) related Standard Consumption Messages (SCMs), and one for demand
(kW). The even ERT ID number will always correspond to the energy value, and
the odd ID will always correspond to the demand value. Only the even ID number
will be displayed on the meter nameplate, and the demand ID will be the next
sequential number.

The R300CD transmits two different types of SCMs representing energy and
demand. This is the only mode of operation used by the R300CD. R300CD option
boards must be installed in a Time-of-Use (TOU) equipped (battery and full
calendar clock capability) CENTRON. The R300CD will interrogate the TOU
module once per minute and read the self read kWh and self read kW values. These
values will typically change only once per billing period.

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 5.9 on page 5-26 is a block diagram of R300CD hardware. R300CD hardware
consists of two option boards: a control section and RF section. The control
section communicates to the TOU module at rate of once per minute using the
expansion port on the TOU module. The communication speed is fixed at 2400
baud in the control section and uses the SCS protocol. In each of the two SCMs
described, the respective parameter reported is converted to a binary format for
the RF transmission. No register information is saved in the R300CD option
boards. In the instance of a power outage, the option board will update the kW and
kWh values from the self read register upon power restoration.

The R300CD features the SchlumbergerSema patented method of tamper detection
that senses both meter removal and 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 the meter socket. The inversion tamper (ITPR) increments a
separate counter each time the meter senses an inversion. The inversion tamper
will be incremented when an inverted status is detected through a closed tilt
switch upon power up. Each of these tamper indications are then transmitted
through the radio frequency transmission.

Operation: C1SD, C1ST, and C1SL Versions

CENTRON Meter Technical Reference Guide 5-25

Operation: C1SD, C1ST, and C1SL Versions

Programming the R300CD Meter

In order for the R300CD meter to operate properly, you must set certain
parameters. Incorrectly set parameters will result in improper operation of the
R300CD.

The R300CD option boards use either a Load Profile (LP) or Time of Use (TOU)
CENTRON personality module. In order for the R300CD to transmit it must have a
kWh register.

For detailed programming instructions, see the PC-PRO+ documentation. Also refer to the
CENTRON R300CD Quick Install Guide.

Control

Board

Meter Base

TOU

Module

Figure 5.9 CENTRON TOU Personality Module with R300CD Option

RF Board

5-26 CENTRON Meter Technical Reference Guide

Chapter 6 Operation: C1SR Version

The SchlumbergerSema 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.

Utilizing the 96-bit iTRON® Standard Consumption Message protocol (SCM), the
C1SR 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 C1SR meters utilize 26-bit identification numbers.

The C1SR 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 C1SR 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 non­volatile memory is restored to the appropriate registers.

Figure 6.1 C1SR

CENTRON Meter Technical Reference Guide 6-1

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. The following information is sent to the
personality module from the base metrology board:

• Line voltage

• Reference voltage

• Energy flow direction

• Energy pulse data

• Line frequency

The C1SR 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 C1SR uses a unique module identification number, 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. This ID number, which
is contained on a bar-coded label, is placed on the LCD housing directly above the
LCD display.

Registers

Display

The C1SR personality module is only available with a liquid crystal display, 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 1S, 2S,
12S, 25S) and transformer rated meters (3S, 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 C1SR 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 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.

Regardless of the register configuration, the transmitted energy will always be in a
5x1 configuration.

The LCD display contains an electronic load indicator (or watt disk emulator). The
load indicator is a single downward pointing triangle that flashes at a rate equal to
the energy consumption. The indicator flashes ON for 1 Wh and OFF for 1 Wh. This
effectively produces an equivalent Kh of 2.0. The LCD is automatically adjusted for
contrast over the operating temperature range.

6-2 CENTRON Meter Technical Reference Guide

Electronic Detent

Resetting Values

Operation: C1SR Version

The C1SR 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 C1SR 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
C1SR 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. Thus, the single load indicator will not flash, nor will the meter
accumulate when reverse energy flow is present.

The ZRO-C2A Resetter zeros both the energy registers and tamper counters by
direct connection to the C1SR module See also The ZRO-C2A Handheld Meter
Resetter for the CENTRON C1S and C1SR Operating Instructions.

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. This randomness provides a method for avoiding interference
with transmissions from other devices. Figure 6.2 shows an example of the
CENTRON C1SR transmission cycle containing one message burst.

.

Figure 6.2 CENTRON C1SR Transmission Cycle

CENTRON Meter Technical Reference Guide 6-3

Operation: C1SR Version

FCC Regulations

Tamper Detection

The C1SR 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 249 Intentional Radiator.

Changes or modifications not expressly approved by SchlumbergerSema Inc. could void
the users authority to operate the equipment.

The CENTRON C1SR features the SchlumbergerSema 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 C1SR module. Although the C1SR
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 radio frequency transmission.

Testing the CENTRON C1SR Tamper Counter

In order to test the power removal counter, the meter must sense a shaken
condition associated with a power outage.

1 Place the meter in a socket.

2 Apply power to the meter.

3 Remove the meter from the live socket.

4 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 C1SR
personality module. The C1SR 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 ReadOne Pro handheld reader converts the 4 bit binary number to

6-4 CENTRON Meter Technical Reference Guide

Operation: C1SR Version

its equivalent value between 0 and 15. Table 6.1 shows the removal and inversion
information based on the reported tamper count. For example, a tamper count of 6
on the ReadOne Pro would translate as 1 meter removal and 2 meter inversions
since the last read.

Table 6.1 ReadOne Pro Tamper Count

Binary

0000 0 0 0
0001 1 1 0
0010 2 2 0
0011 3 3 0
0100 4 0 1
0101 5 1 1
0110 6 2 1
0111 7 3 1
1000 8 0 2
1001 9 1 2
1010 10 2 2
1011 11 3 2
1100 12 0 3
1101 13 1 3
1110 14 2 3

1111 15 3 3

Tamper

Count

Inversion Removal

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 249 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 in the illustrations below.

Changes or modifi catio ns not expressl y app roved b y Schl umberge rSema could void the us er’s
authority to operate the equipment.

CENTRON Meter Technical Reference Guide 6-5

Operation: C1SR Version

To retrofit an existing meter with an R300 module, follow "Retrofitting with
Personality Modules" on page 2-3 and attach FCC Label on the left side of the inner
cover at the 9 o’clock position as illustrated in Figure 6.3.

FCC Label

Figure 6.3 FCC Label

6-6 CENTRON Meter Technical Reference Guide

Chapter 7 Operation: C1SC Version

The SchlumbergerSema C1SC is a one-way transmitter used for fixed network
applications. The C1SC uses CellNet RF 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.

The C1SC 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 assigned by SchlumbergerSema,
and programmed by SchlumbergerSema, to every meter within the network. LAN
addresses and utility billing IDs are unique to each meter. SchlumbergerSema
activates the LAN ID upon receipt of the meter association file from
SchlumbergerSema.

After programming, the module is tested to verify the operating system parameters
and FCC compliance. A final test is performed via RF to verify a correct LAN
address meter ID number of digits and RF signal.

Figure 7.1 C1SC

CENTRON Meter Technical Reference Guide 7-1

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.

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 on­off-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.

Figure 7.2 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 7.2, 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.

7-2 CENTRON Meter Technical Reference Guide

Operation: C1SC Version

kWh

(Pulses)

(Pulses)

2.5 minutes

2.5 minutes

(Interval

(Interval

Resolution)

Resolution)

Interval 0

Interval 0

kWh

Interval 1

Interval 1

Interval 2

Interval 2

C

ELLNET ELECTRICITY INTERVAL TELEMETRY

C

ELLNET ELECTRICITY INTERVAL TELEMETRY

0

0

1

1

45 minutes

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

Interval 4

Interval 4

Interval 5

Interval 5

0 1 2 3 4 5 6 7 8 9

Interval 6

Interval 6

Interval 3

Interval 3

45 minutes

101112131415161

101112131415161

101112131415161

101112131415161

1011121314151

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

1

0

0

Interval packets contain 18 intervals

Interval packets contain 18 intervals

7

7

7

7

1011121314151

6

101112131415161

101112131415161

101112131415161

101112131415161

101112131415161

1

Intervals close every 2.5 minutes

Intervals close every 2.5 minutes

1

Endpoints transmit approx. every 5 minutes

1

Endpoints transmit approx. every 5 minutes

7

Transmissions are randomized over 5 minute period.

6

7

Transmissions are randomized over 5 minute period.

Each interval is transmitted nine times, thus nine times the redundency.

Each interval is transmitted nine times, thus nine times the redundency.

7

7

7

7

101112131415161

7

101112131415161

101112131415161

7

7

7

Time

Time

FCC Regulations

Display Functions

101112131415161

Interval 7

Interval 7

Interval 8

Interval 8

Interval 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

Interval 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

101112131415161

7

101112131415161

101112131415161

101112131415161

101112131415161

7

7

7

7

7

Figure 7.2 CellNet Telemetry

The C1SC 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.

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 range.

A watt disk emulator is located on the lower right hand corner of the display. The
indicator consists of three triangles that light up sequentially left to right to
indicate forward current flow. One full rotation of the three indicators is equivalent
to 6 Watthours of energy.

CENTRON Meter Technical Reference Guide 7-3

Operation: C1SC Version

Resetting Values

The C1SC can be reset using the CellNet Shooter device in conjunction with a
computer.

Programming the C1SC/CN1SC

The CENTRON C1SC/CN1SC 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 (see Figure 7.3).

Figure 7.3 C1SC/CN1SC Programming Port Location

7-4 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. Topics covered include:

• Testing support features

•Energy testing

• Recommended testing procedures

• TOU schedule testing

• Field testing

• Troubleshooting (Fatal and non-fatal errors)

• Maintenance

Testing Support Features

Infrared Test LED

The CENTRON meter is equipped with an Infrared Test Light Emitting Diode
(LED) 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 (see Figure 8.1). The pulse weight represented by the LED pulses is 1.0
watthour per pulse (Kh=1.0).

Test Led

Figure 8.1 LED Location

Pulse Detector

An optional pulse detector is available for the CENTRON meter. The pulse detector
has an infrared pickup with 2 visible LEDs. When positioned over the CENTRON
light pipe, 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

CENTRON Meter Technical Reference Guide 8-1

Testing, Troubleshooting, and Maintenance

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. See
Chapter 9 for the Pulse Detector part number.

Annunciators

Figure 8.2 Pulse Detector

Watthour Annunciators

C1SR meters (and some C1S versions) are equipped with LCD displays that utilize
a single flashing triangular annunciator to show that power is being metered. The
annunciator represents 1.0 watthour each time it turns on and 1.0 watthour each
time it turns off for a total of 2.0 watthours.

On other CENTRON meters equipped with LCD’s, there are 3 such annunciators
which also show the direction of energy flow (C1S, C1SC, C1SD, C1ST, C1SL). The
triangles will scroll left to right for positive (line to load) energy flow, and right to
left for negative energy flow.

The Kh value of the single triangle is twice the Kh of the LED and, therefore, 2.0
watthours per pulse. On the three triangle units the Kh of each triangle is further
multiplied by 3 as each triangle is turned on and off in sequence, resulting on a Kh
of 6.0.

TOU Rate Annunciators

The CENTRON meter is equipped with 5 Time-of-Use annunciators on the LCD
(see Figure 8.3). Located on the right side of the display, the annunciator A, B, C, D,
or TOTAL flashes when the applicable rate is active and is enabled to display their
respective values. (Available on the C1ST and C1SL.)

8-2 CENTRON Meter Technical Reference Guide

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 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.

Testing, Troubleshooting, and Maintenance

Figure 8.3 TOU Rate Annunciators

# OF PULSES REQUIRED ON TEST BOARDS

1S & 2S CL200 120V 3S,

240V 3S,

12S & 25S, 2S

CL 320

240V 4S

Full Load 10 7 15

Light Load 10 6 7

Power 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 0.01% (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.

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:

CENTRON Meter Technical Reference Guide 8-3

Testing, Troubleshooting, and Maintenance

Number of Pulses per sec Wapp

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

Table 8.1 shows the AEP Test Codes.

1hr

-----------­3600

1Kh××=

Field Testing

Tab l e 8 . 1 A E P Te st C od e s

Meter Specification Code

CL100 120V 2W 1 Phase Type C1S 15TA 1.0Kh FM1S 60Hz 2B
CL200 240V 3W 1 Phase Type C1S 30TA 1.0Kh FM2S 60Hz 1N
CL320 240V 3W 1 Phase Type C1S 50TA 1.0Kh FM2S 60Hz 2J
CL20 240V 2W 1 Phase Type C1S 2.5TA 1.0Kh FM3S 60Hz 2F
CL20 120V 2W 1 Phase Type C1S 2.5TA 1.0Kh FM3S 60Hz 2E
CL20 240V 3W 1 Phase Type C1S 2.5TA 1.0Kh FM4S 60Hz 2G
CL200 120V 3W 2 Phase Type CN1S 30TA 1.0Kh FM12S

60Hz
CL200 120V 3W 2 Phase Type CN1S 30TA 1.0Kh FM25S

60Hz

2H

2I

Field testing of the CENTRON meter may be accomplished with conventional
methods using either the infrared test LED or the disk emulation annunciator
(when supplied). For details on the operation of the annunciator, see Page 8-2.

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.

8-4 CENTRON Meter Technical Reference Guide

Troubleshooting

Error Codes (R300)

Non-Fatal Error

Cause Effect Indication

Checksum Error of the
Energy Register

Fatal Error

Cause Effect Indication

Unsuccessful writing to or
reading from EEPROM
memory.

Metrology error.

Stops RF transmission but
continues energy
accumulation and will be
cleared after a power cycle.

All metering and RF functions
are halted. Return the module
to the factory for repair.

All metering and RF functions
are halted. Return the meter
and module to the factory for
repair.

Testing, Troubleshooting, and Maintenance

The LCD will display the
annunciator, a downward
pointing arrow, in the lower
right hand corner.

The LCD will display the word
Error in the area normally
used for energy
accumulation.

The LCD will display the word
Error in the area normally
used for energy
accumulation.

Error Codes (Demand, TOU, and Load Profile)

The firmware performs error checks to confirm proper register operation. Table

8.2 lists possible errors and associated error codes.

Low Battery Er 000001 Non-fatal
EEPROM Er 000010 Fatal
Reverse Direction Er 007000 Non-fatal
Clock Er 010000 Non-fatal
Full Scale Overflow Er 100000 Non-fatal
TOU Error Er 020000 Non-fatal
Load Profile Error Er 030000 Non-fatal
Metrology Error Er 000004 Fatal

Fatal errors cause the display to lock on the error code. If multiple fatal errors
occur, the one that was detected first will be the error code that locks on the
display.

Table 8.2 Error Codes

Error Error Code Error Type

CENTRON Meter Technical Reference Guide 8-5

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.

Activating the Alternate Mode Magnetic Reed Switch allows the Normal Mode
Display 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.

Non-Fatal Error Codes

Code Error Possible Causes

Er 000001 Low Battery Error

Er 007000

Er 010000 Clock Error

Er 020000 TOU Error

Er 030000 Load Profile Error

Table 8.3 Non-Fatal Error Codes

Number of minutes on the battery has exceeded one year­replace module—checked on power up and once per second.

Discussion:
A low battery check is performed once every second. If a low battery level is detected

during this procedure, error code Er 000001 is displayed in Normal mode. This error can
be programmed to continuously scroll during the one second display off-time or lock on
the register display. A low battery continues to function; however, its reliability decreases
over time.

If a low battery level error occurs during normal operation, TOU and Mass Memory will
continue to operate until an outage occurs. If a low battery level is detected upon
programming or upon restoration of power after an outage, ER 000001 will display. Total
registers remain functional during a Low Battery Condition; however, TOU (rates A, B,
C, D) registers and load profile will not accumulate.

Reverse Direction
Error

Discussion:
A Reverse Direction error exists when the register detects 10 Wh in the reverse

direction. Reverse Direction detection is a selected feature during programming. If a
Reverse Direction error occurs, Er 007000 is displayed during the one second off-time
in Normal mode.

The Reverse Direction error will clear when a demand reset is performed.

Discussion:
A Clock error exists when a clock parameter is determined to be out of range. If this

error occurs, Er 010000 is displayed in Normal mode. This error is programmable to
continuously scroll during the one second display off-time or lock on the register display.

If a Clock error occurs, the Load Profile and TOU operations will be discontinued until
the meter is reprogrammed. The error will then clear, and the meter will resume normal
operation.

Discussion:
A TOU error occurs when the TOU calendar is out of range. TOU is disabled.

Reverse Direction Error Indicator—Clear on demand reset or
reprogram register; checked continuously.

Clock Error—Reprogram register and check for proper
operation; checked upon programming and once per second

TOU Error—Reprogram register and check for proper
operation; checked upon programming and once per second

Load Profile Error—Reprogram register and check for proper
operation; checked upon programming and once per second

8-6 CENTRON Meter Technical Reference Guide

Testing, Troubleshooting, and Maintenance

Table 8.3 Non-Fatal Error Codes

Code Error Possible Causes

Discussion:
A Load Profile error occurs when the Load Profile parameter is out of range or inactive.

Programmed Full Scale Value exceeded—Check programmed
Full-Scale value and meter installation for proper sizing of
equipment; checked continuously.

Er 100000

Full Scale Overflow
Error

Discussion:
A Full Scale overflow error exists when the calculated demand at an EOI exceeds the

register Full Scale value. The register Full Scale value is selected during programming.
If an overflow occurs, the error code Er 100000 is displayed in Normal mode. This error
is programmable to display during the one second display off-time or lock on the register
display.

The Full Scale overflow error displays when the overflow occurred. The Maximum
Demand register continues to accumulate and display kW as long as the format
limitations are not exceeded. When a demand reset is performed, the correct Max kW
value will be added to the cumulative registers and the error code will no longer be
displayed. If a Full Scale overflow occurs, check the installation to ensure that the
current metering capability has not been exceeded. A Full Scale overflow in no way
affects the existing billing data.

Fatal Error Codes

Table 8.4 Fatal Error Codes

Code Error Possible Causes

(Available in firmware revisions 10.27 and above.) Defective

Er 000004 Metrology Error

Discussion:
The direction of energy flow signal is monitored for rate of change. If the rate of change

exceeds 14 Hz, the metrology error is triggered. Under this condition the base metrology
has become defective and the energy pulse signal being sent from metrology to the
D/T/L module is no longer valid. Base metrology should be replaced in the event of this
error.

Er 000010 EEPROM Error

Discussion:
If the module has an EEPROM error, the error code ER 000010 will be continuously

displayed. If this error occurs, program the module and check for proper operation. If the
error continues to exist, replace the module.

component in the base metrology causing invalid energy pulse
signal.

Energy value checksum failure; EEPROM failure—reprogram
module and check for proper operation. If error still does not
clear, replace module; checked upon programming and at
power up.

CENTRON Meter Technical Reference Guide 8-7

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 Meter Apply power.
LCD/LCD Driver Failure Replace Register Circuit Board.
Loose Power Supply Connection Remove and re-seat board-to-board connector.

Time and Date Wrong (TOU or Load Profile Only)

Time/Date Wrong in PC or Handheld device

Wrong Line Frequency

Battery Failure During Power Outage Replace module.
Daylight Savings Time not Programmed

Correctly
Timekeeping circuitry component failure Replace module.

No Accumulation of kWh or kW

Demand Delay Selected

Module was left in Test mode

Module Not Receiving Pulses

Time-of-Use Schedule programmed
incorrectly

Cause Solution

Verify and update time/date in programming device
and download new time and date to register. See
appropriate software manual for more detailed
directions.

Verify proper line frequency is selected in Setup
routine in programming software. Select proper
frequency and reconfigure meter.

Verify DST is selected in program. Reconfigure
meter with correct program.

Cause Solution

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.

Accumulation of kW or kWh will not take place while
register is in Test mode. Exit Test mode and verify
proper accumulation begins.

Verify that meter is accumulating energy by testing
infrared test LED.

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.

8-8 CENTRON Meter Technical Reference Guide

Cause Solution

Component Failure Replace module.

Software Cannot Communicate with Module

Cause Solution

Optical Probe Cable Assembly Failure

Com Port in PC is Set Wrong

Security code in Module

Probe Not Connected Properly

Optical Connector Failure Replace cover assembly.
Electronics Failure Replace module.

Incorrect Baud Rate

Testing, Troubleshooting, and Maintenance

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.

Optical port can be programmed to operate at 4800
or 9600 baud. Factory default baud rate is 4800.

Reed Switch Does Not Activate the Alternate Mode

Cause Solution

Magnetic Field is too Weak
Reed Switch Failure Replace module.
Alternate Mode Items Not Selected

Reset Mechanism Does Not Initiate Demand Reset

Cause Solution

Reset Mechanism Does Not
Initiate Demand Reset

Reset Has Occurred Within Last 60 Seconds

Reset Button Is Defective Replace module.

Demand Reset Cannot be Initiated Through PC or Handheld

Cause Solution

Communication Cannot Be Established See Programming Problems.

Place magnet closer to switch or use stronger
magnet.

Re-program meter with items to be displayed in
Alternate mode.

Re-install or Replace cover assembly.
Manual demand reset cannot occur within 60

seconds of the previous demand reset. Wait 60
seconds and perform a second Demand Reset.

CENTRON Meter Technical Reference Guide 8-9

Testing, Troubleshooting, and Maintenance

Test Mode Switch Does Not Place Module in Test Mode

Cause Solution

Switch Not Fully Depressed
Switch or Electronic Failure Replace module.
Test Mode Items Not Selected

Inspecting and Troubleshooting—C1S LCD and C1SR

Blank Display

Cause Solution

Power not applied to the meter Apply power.
Loose power supply connection Remove and re-seat board to board connector.

LCD/LCD Driver failure

Verify that the test mode pushbutton has been
completely depressed.

Re-program module with items to be displayed in
Test mode.

Replace Register circuit board.
Note: Energy reading and tamper flags may be

uploaded with the ZRO-C2A.

8-10 CENTRON Meter Technical Reference Guide

Chapter 9 Specifications and Drawings

Specifications

C1S

Table 9.1 C1S Specification

Class Volts Wire Form Register

100 120 2 1S CLOCK 5X1 980300000-000 980310000-000
100 120 2 1S CLOCK 4X10 980320000-000 980330000-000
100 120 2 1S CYCLO 5X1 980340000-000 980350000-000
100 120 2 1S CYCLO 4X10 980360000-000 980370000-000
100 120 2 1S LCD w/Segment Check 5X1 980380000-000 980390000-000

100 120 2 1S

100 120 2 1S LCD w/Segment Check 4X10 980400000-000 980410000-000

200 240 3 2S CLOCK 5x1 980000000-000 980010000-000
200 240 3 2S CLOCK 4X10 980020000-000 980030000-000
200 240 3 2S CYCLO 5X1 980040000-000 980050000-000
200 240 3 2S CYCLO 4X10 980060000-000 980070000-000
200 240 3 2S LCD w/Segment Check 5X1 980080000-000 980090000-000

LCD w/o Segment
Check

Digits/

Mult

5X1 984540000-000 984550000-000

Specification Number

Glass Poly

200 240 3 2S

200 240 3 2S LCD w/Segment Check 4X10 980100000-000 980110000-000

320 240 3 2S CLOCK 5x1 981140000-000 981150000-000
320 240 3 2S CLOCK 4X10 981160000-000 981170000-000
320 240 3 2S CYCLO 5X1 981180000-000 981190000-000
320 240 3 2S CYCLO 4X10 981200000-000 981210000-000

LCD w/o Segment
Check

5X1 984090000-000 984100000-000

CENTRON Meter Technical Reference Guide 9-1

Specifications and Drawings

Table 9.1 C1S Specification

Class Volts Wire Form Register

320 240 3 2S LCD w/Segment Check 5X1 981220000-000 981230000-000

320 240 3 2S

320 240 3 2S LCD w/Segment Check 4X10 981240000-000 981250000-000

20 120 2 3S CLOCK 5xTR 980540000-000 980550000-000
20 120 2 3S CLOCK 4X10 980560000-000 980570000-000
20 120 2 3S CYCLO 5XTR 980580000-000 980590000-000
20 120 2 3S CYCLO 4XTR 980600000-000 980610000-000
20 120 2 3S LCD w/Segment Check 5XTR 980620000-000 980630000-000

20 120 2 3S

20 120 2 3S LCD w/Segment Check 4XTR 980640000-000 980650000-000
20 240 2 3S CLOCK 5xTR 980660000-000 980670000-000
20 240 2 3S CLOCK 4XTR 980680000-000 980690000-000

LCD w/o Segment
Check

LCD w/o Segment
Check

Digits/

Mult

5X1 983950000-000 983960000-000

5XTR 985590000-000 985600000-000

Specification Number

Glass Poly

20 240 2 3S CYCLO 5XTR 980700000-000 980710000-000
20 240 2 3S CYCLO 4XTR 980720000-000 980730000-000
20 240 2 3S LCD w/Segment Check 5XTR 980740000-000 980750000-000

20 240 2 3S

20 240 2 3S LCD w/Segment Check 4XTR 980760000-000 980770000-000
20 240 3 4S CLOCK 5xTR 980780000-000 980790000-000
20 240 3 4S CLOCK 4XTR 980800000-000 980810000-000
20 240 3 4S CYCLO 5XTR 980820000-000 980830000-000
20 240 3 4S CYCLO 4XTR 980840000-000 980850000-000
20 240 3 4S LCD w/Segment Check 5XTR 980860000-000 980870000-000

20 240 3 4S

20 240 3 4S LCD w/Segment Check 4XTR 980880000-000 980890000-000

200 120 3 12S CLOCK 5x1 980900000-000 980910000-000
200 120 3 12S CLOCK 4X10 980920000-000 980930000-000

LCD w/o Segment
Check

LCD w/o Segment
Check

5XTR 985610000-000 985620000-000

5XTR 985630000-000 985640000-000

200 120 3 12S CYCLO 5X1 980940000-000 980950000-000

9-2 CENTRON Meter Technical Reference Guide

Table 9.1 C1S Specification

Specifications and Drawings

C1SR

Class Volts Wire Form Register

200 120 3 12S CYCLO 4X10 980960000-000 980970000-000
200 120 3 12S LCD w/Segment Check 5X1 980980000-000 980990000-000
200 120 3 12S LCD w/Segment Check 5X1 983930000-000 983940000-000
200 120 3 12S LCD w/Segment Check 4X10 981000000-000 981010000-000
200 120 3 25S CLOCK 5x1 981020000-000 981030000-000
200 120 3 25S CLOCK 4X10 981040000-000 981050000-000
200 120 3 25S CYCLO 5X1 981060000-000 981070000-000
200 120 3 25S CYCLO 4X10 981080000-000 981090000-000
200 120 3 25S LCD w/Segment Check 5X1 981100000-000 981110000-000

200 120 3 25S

200 120 3 25S LCD w/Segment Check 4X10 981120000-000 981130000-000

LCD w/o Segment
Check

Digits/

Mult

5X1 985650000-000 985660000-000

Specification Number

Glass Poly

Table 9.2 C1SR Specifications

Class Volts Wire Form Register

100 120 2 1S R300 5X1 981500000-000 981510000-000
100 120 2 1S R300 4X10 981520000-000 981530000-000

200 240 3 2S R300 5X1 980120000-000 980130000-000
200 240 3 2S R300 4X10 980140000-000 980150000-000

320 240 3 2S R300 5X1 981740000-000 981750000-000
320 240 3 2S R300 4X10 981760000-000 981770000-000

20 120 2 3S R300 5XTR 981540000-000 981550000-000
20 120 2 3S R300 4XTR 981560000-000 981570000-000
20 240 2 3S R300 5XTR 981580000-000 981590000-000
20 240 2 3S R300 4XTR 981600000-000 981610000-000

Digits/

Mult

Specification Number

Glass Poly

20 240 3 4S R300 5XTR 981620000-000 981630000-000

CENTRON Meter Technical Reference Guide 9-3

Specifications and Drawings

Table 9.2 C1SR Specifications

C1SC

Class Volts Wire Form Register

20 240 3 4S R300 4XTR 981640000-000 981650000-000

200 120 3 12S R300 5X1 981660000-000 981670000-000
200 120 3 12S R300 4X10 981680000-000 981690000-000
200 120 3 25S R300 5X1 981700000-000 981710000-000
200 120 3 25S R300 4X10 981720000-000 981730000-000

Digits/

Mult

Specification Number

Glass Poly

Table 9.3 C1SC Specifications

Class Volts Wire Form Register

100 120 2 1S CellNet 5X1 980420000-000 980430000-000

Digits/

Mult

Specification Number

Glass Poly

C1SD

200 240 3 2S CellNet 5X1 980160000-000 980170000-000

20 120 2 3S CellNet 5XTR 981260000-000 981270000-000
20 240 2 3S CellNet 5XTR 981300000-000 981310000-000
20 240 3 4S CellNet 5XTR 981340000-000 981350000-000

200 120 3 12S CellNet 5X1 981380000-000 981390000-000
200 120 3 25S CellNet 5X1 981420000-000 981430000-000
320 240 3 2S CellNet 5X1 981480000-000 981470000-000

Table 9.4 C1SD Specifications

Class Volts Wire Form Register Cover

100 120 2 1S Demand POLY 981780000-000

Specification

Number

200 240 3 2S Demand POLY 980200000-000

9-4 CENTRON Meter Technical Reference Guide

Table 9.4 C1SD Specifications

Specifications and Drawings

C1ST

Class Volts Wire Form Register Cover

320 240 3 2S Demand POLY 981840000-000

20 120 2 3S Demand POLY 981790000-000
20 240 2 3S Demand POLY 981800000-000
20 240 3 4S Demand POLY 981810000-000

200 120 3 12S Demand POLY 981820000-000
200 120 3 25S Demand POLY 981830000-000

Specification

Number

Table 9.5 C1ST Specifications

Class Volts Wire Form Register Cover

Specification

Number

100 120 2 1S TOU POLY 981850000-000

200 240 3 2S TOU POLY 980210000-000

320 240 3 2S TOU POLY 981910000-000

20 120 2 3S TOU POLY 981860000-000
20 240 2 3S TOU POLY 981870000-000
20 240 3 4S TOU POLY 981880000-000

200 120 3 12S TOU POLY 981890000-000
200 120 3 25S TOU POLY 981900000-000

CENTRON Meter Technical Reference Guide 9-5

Specifications and Drawings

R300CD

Table 9.6 R300CD Specifications

Class Volts Wire Form Register Cover

100 120 2 1S

200 240 3 2S

320 240 3 2S

20 120 3 3S

20 240 2 3S

20 240 3 4S

200 120 3 12S

TOU with
R300CD

TOU with
R300CD

TOU with
R300CD

TOU with
R300CD

TOU with
R300CD

TOU with
R300CD

TOU with
R300CD

POLY 982900000-000

POLY 98291000-000

POLY 983010000-000

POLY 983140000-000

POLY 983150000-000

POLY 983160000-000

POLY 983170000-000

Specification

Number

C1SL

200 120 3 25S

TOU with
R300CD

POLY 983600000-000

Table 9.7 C1SL Specifications

Class Volts Wire Form Register Cover

100 120 2 1S Load Profile POLY 981920000-000

200 240 3 2S Load Profile POLY 980220000-000

320 240 3 2S Load Profile POLY 981980000-000

20 120 2 3S Load Profile POLY 981930000-000
20 240 2 3S Load Profile POLY 981940000-000

Specification

Number

9-6 CENTRON Meter Technical Reference Guide

Table 9.7 C1SL Specifications

Specifications and Drawings

Drawings

Class Volts Wire Form Register Cover

20 240 3 4S Load Profi le POLY 981950000-000

200 120 3 12S Load Profile POLY 981960000-000
200 120 3 2S5 Load Profile POLY 981970000-000

10

LINE

1

0

Specification

Number

10

LOAD

Figure 9.1 Form 1S Wiring Diagram

++

CENTRON Meter Technical Reference Guide 9-7

Specifications and Drawings

102

LINE

1

102

02

LOAD

Figure 9.2 Form 2S Wiring Diagram

Figure 9.3 Form 3S Wiring Diagram

9-8 CENTRON Meter Technical Reference Guide

Specifications and Drawings

Alternate positions
of movable potential
terminal

Figure 9.4 Form 4S Wiring Diagram

Alternate
positions of
fifth
terminal
jaw

Figure 9.5 Form 12S Wiring Diagram

CENTRON Meter Technical Reference Guide 9-9

Specifications and Drawings

Notes:

Figure 9.6 Form 25S Wiring Diagram

9-10 CENTRON Meter Technical Reference Guide

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. A memory chip that can

only be erased by an electrical signal (retains data during a power outage)

EPROM Erasable Programmable Read Only Memory. Similar to EEPROM except it requires

ultraviolet light to be erased

electronic detent An algorithm in firmware which restricts the device to metering energy flow only to

the customer (unidirectional metering)

firmware Computer programs stored in non-volatile memory chips (ROMs, PROMs, EPROMs,

EEPROMs, etc.)

fixed decimal A display format that always retains the same number of digits to the right of the

decimal point

floating decimal A display format that allows a maximum number of digits to the right of the

decimal, but can display any number of digits to the right of the decimal equal to or
less than that number specified

LCD Liquid Crystal Display

LED Light-Emitting Diode

magnetic reed switch A mechanical switch consisting of a thin metal contact which is closed by an

external magnetic field

nonvolatile memory See EEPROM

RS-232 A communication media whereby information is transmitted through a serial bit

stream

CENTRON Meter Technical Reference Guide G-1

Glossary

Notes:

G-2 CENTRON Meter Technical Reference Guide

Index

A

ADC 3-2, 3-4

AEP barcode
AEP test codes
alternate display mode
Alternate mode annunciator
Alternate Mode Magnetic Reed Switch
analog to digital converter (ADC)
annunciator

antenna

Application Specific Integrated Circuit (ASIC)
ASIC
automatic demand reset

7-2

8-4

2-2, 5-5, 8-2–8-3, G-1

Alternate mode
disk emulator

5-5

EOI

5-5

kWh

5-3

Test
test mode

6-2, 7-2

RF

8-4

5-5

3-2–3-3

5-3

5-5

8-6

3-2

5-5

5-8

B

barcode

7-2

AEP
LAN address

1-2

base
base metrology

1-5, 5-22

battery

5-22

life
self-discharge rate

G-1

baud
billing quantities
Binary Phase Shift Keyed (BPSK) modulation
blank display
block demand
block interval
board-to-board connector

7-2

BPSK
button

test mode

7-2

3-1

5-22

5-7

8-8, 8-10

5-14, 5-21

5-20

2-4, 2-6–2-7, 4-2

2-2, 5-4

C

calendar schedule 5-15
calibration
CellNet RF technology

CellNet Shooter
CENTRON developer’s kit
circuit board

3-3

7-1

C1SC

7-4

2-4

metrology
register module

1-3, 6-4

3-3

2-1

3-2

7-2

clock circuit
Clock error
clock module
clock register
communication

communication problem
communications rate

comparator
connector

continuous cumulative demand
controls and indicators
counter

cover

CRC
Crystal Time synchronization
cumulative demand
current interval demand
current season register
current/potential terminals
Cyclic Redundancy Checks (CRC)
cyclometer

1-5

8-6

4-1, 4-3
3-3, 4-1

optical port

5-1

8-9

2-2

default

8-3

board-to-board

2-4, 2-6–2-7, 4-2

5-2

power removal
tamper

6-4

5-25

2-2, 5-24

configurations

2-7

inner
See also inner cover and outer cover

1-5

7-1

2-2

5-21

5-3

5-8, 5-16

2-2

3-3, 4-1

D

daily schedule 5-15
Daylight Savings Time (DST)
demand calculation
demand module
demand register
demand reset

automatic
demand reset button
demand reset switch
detent register
disk emulation annunciator
display

duration
display item
display modes

5-16

DST

5-20

5-4

5-7

2-7, 5-14, 8-9

5-8

4-2

G-1

5-6

5-2

5-16

5-2, 5-24

5-14

8-4

E

EEPROM 5-17, 5-22, G-1

EEPROM error

8-7

5-21

7-1

CENTRON Meter Technical Reference Guide I-1