Elster A1100 Installation and operation manual

A1100
Electronic Polyphase Meter
Operating & Maintenance Instructions
M180 001 1E
7.2005
The company’s policy is one of continuous product improvement and the
right is reserved to modify the specification contained herein without notice

A1100 - Electronic Polyphase Meter 1
©Elster Metering Systems - M180 001 1E - 6.2005
Contents
1 FOREWORD........................................................................................................................................3
2 WARNINGS..........................................................................................................................................4
3 COMPLIANCE WITH STANDARDS AND EUROPEAN DIRECTIVES ...............................................4
4 APPROVALS.......................................................................................................................................4
5 INTRODUCTION..................................................................................................................................5
6 GENERAL DESCRIPTION...................................................................................................................6
6.1 BASIC METER TYPES...............................................................................................................................6
6.2 CURRENT AND VOLTAGE RATINGS ............................................................................................................6
6.3 SYSTEM CONNECTIONS............................................................................................................................6
6.4 METER CONFIGURATIONS.........................................................................................................................7
6.5 METER ACCURACY ..................................................................................................................................7
6.6 METER CASE..........................................................................................................................................7
7 TIME OF USE REGISTERS.................................................................................................................8
8 OVER VOLTAGE OPERATION...........................................................................................................8
9 POWER FLOW INSENSITIVE MODE .................................................................................................8
10 TEST INDICATOR & ANTI-CREEP.....................................................................................................8
11 SECURITY FEATURES.......................................................................................................................9
11.1 DATA RETENTION....................................................................................................................................9
11.2 PHASE PRESENT/PHASE FAIL INDICATION..................................................................................................9
11.3 RECORDABLE SECURITY FEATURES ........................................................................................................10
11.3.1 Reverse Energy Flow.........................................................................................................................10
11.3.2 Power Fail Count................................................................................................................................10
11.3.3 Phase Fail Count................................................................................................................................10
11.3.4 Elapsed Hours - Rate 1 and Rate 2....................................................................................................10
11.4 METER ERRORS....................................................................................................................................10
LCD METER.........................................................................................................................................10
STEPPER REGISTER METER ...................................................................................................................10
12 METER REGISTER AND DISPLAYS................................................................................................11
12.1 LIQUID CRYSTAL DISPLAY ......................................................................................................................11
12.2 DISPLAY MODES ...................................................................................................................................12
12.3 DISPLAYABLE DATA ...............................................................................................................................12
2RATE METER .....................................................................................................................................14
12.4 DISPLAY MULTIPLIER (CT OPERATED METERS).........................................................................................17
12.5 METER ERRORS....................................................................................................................................17
12.6 MECHANICAL STEPPER TYPE REGISTER ..................................................................................................17
13 COMMUNICATIONS..........................................................................................................................18
13.1 IRDA COMMUNICATIONS ........................................................................................................................18
13.2 OPTIONAL SERIAL DATA PORT................................................................................................................18
13.3 TRANSMITTED DATA ..............................................................................................................................19
14 PULSING OUTPUT............................................................................................................................20
15 AUXILIARY VOLTAGE TERMINALS................................................................................................21
16 TECHNICAL DATA............................................................................................................................22

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17 INSTALLATION.................................................................................................................................23
17.1 UNPACKING ..........................................................................................................................................23
17.2 HANDLING ............................................................................................................................................23
17.3 STORAGE .............................................................................................................................................23
17.4 INSTALLATION SITE................................................................................................................................23
17.5 ELECTROMAGNETIC COMPATIBILITY (EMC)..............................................................................................23
17.6 FIXING AND CONNECTION.......................................................................................................................24
18 COMMISSIONING..............................................................................................................................25
19 MAINTENANCE.................................................................................................................................25
20 DISPOSAL AND RECYCLING ..........................................................................................................26
FIGURES
FIGURE 1-MODEL CODE..........................................................................................................................27
FIGURE 1A -MODEL CODE (CONTINUED) ......................................................................................................28
FIGURE 2-LIQUID CRYSTAL DISPLAY METER..............................................................................................29
FIGURE 2A -STEPPER REGISTER METERLCD NAMEPLATE ............................................................................30
FIGURE 3-NAMEPLATES...........................................................................................................................31
FIGURE 4-LOAD CURVES (CLASS 1LIMITS)...............................................................................................32
FIGURE 5-TERMINAL ARRANGEMENTS.......................................................................................................33
FIGURE 5A -TERMINAL CONFIGURATIONS.....................................................................................................34
FIGURE 6- DIMENSIONS,FIXING CENTRES AND TERMINAL COVER WITH CUT-OUT ..........................................35
FIGURE 7-TYPICAL SINGLE RATE IMPORT METER DISPLAY..........................................................................36
FIGURE 7A -TYPICAL TWO RATE IMPORT METER DISPLAY .............................................................................37
FIGURE 7B -DISPLAY DATA (LCD METER) ...................................................................................................38
APPENDIX A – IRDA DATA FORMATS ........................................................................................................39
A1 INTRODUCTION......................................................................................................................................39
A2 IRDA OUTPUT MESSAGE .......................................................................................................................39
A3 IRDA DATA BITS ...................................................................................................................................40
A4 IRDA MESSAGE FORMAT .......................................................................................................................41
A5 IRDA TRANSMISSION TABLE:STATUS AND BILLING DATA ..........................................................................41
APPENDIX B - CHECKING KWH REGISTRATION ACCURACY..................................................................44
B1 INTRODUCTION......................................................................................................................................44
B2 CHECKING METER ACCURACY USING THE TEST LED................................................................................44
B2.1 Comparing the number of LED pulses with substandard meter register advance..............................44
B2.2 Comparing LED pulses with substandard meter pulses.....................................................................45
B3 CHECKING METER REGISTRATION ACCURACY FROM REGISTER ADVANCES.................................................45
B3.1 Using the 'Test' values on the meter display.......................................................................................45
B3.2 Using the register readings from the IrDA output................................................................................46
B3.2.1 Comparing the IrDA register reading advance with that of a substandard meter................................46
APPENDIX C - IRDA DATA SOFTWARE ......................................................................................................47
C1 INTRODUCTION.....................................................................................................................................47
C1.1 Installing the Software .......................................................................................................................47
C1.2 Collecting Data Using a Laptop .........................................................................................................47
C1.3 Collecting Data Using a PDA.............................................................................................................49

Operating & Maintenance Instructions 3
1 FOREWORD
HEALTH AND SAFETY
Compliance with Instructions in this Manual
The instructions and information in this manual are provided in compliance with Section 6 of the UK
Health and Safety at Work Act, as amended by Schedule 3 of the Consumer Protection Act 1987.
The purchaser is responsible for making sure that everyone, whether in his employment or not, who will
be associated with the products supplied by Elster Metering Systems, and to which these instructions
and information apply, are made familiar with the contents of this manual.
This applies to all persons who may be involved in activities such as unpacking, inspecting, testing,
setting, cleaning, installing, commissioning, operating, maintaining, decommissioning or disposing of
the products.
Safety of Persons using Electrical Products
Employers have a duty to ensure, as far as is reasonably practicable, the Health, Safety and Welfare at
Work of all their employees. Employers must therefore ensure that employees are informed, trained and
supervised and use proper working procedures to ensure the safety of themselves and others.
The information provided in this manual is intended to ensure that products are properly installed and
otherwise handled in order to maintain them in a safe condition.
In the UK, employers have duties under the Health and Safety at Work Act 1974 and the various
regulations stemming therefrom.
In countries outside the UK, employers should ensure proper compliance with the Health and Safety
Legislation that is applicable to them.
Putting into Service
Products supplied by Elster Metering Systems have been designed and manufactured, in accordance
with appropriate standards, to operate under specified conditions, when properly installed.
The purchaser or delegated contractor is responsible for the "Putting into Service" of any Elster
Metering Systems products that have been supplied as "Non-connected". All related activities must
therefore be carried out with due regard to any applicable legislation, standards and good practice.

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2 WARNINGS
WARNINGS
Internal Electronic Circuits
Parts of the internal electronic circuits of these meters are, due to technical necessity, connected to
PHASE VOLTAGES.
Removal of Terminal Cover
All supplies connected to the meter should be isolated before any attempt is made to remove the
meter terminal cover. Failure to do so may result in electric shock or death.
Live parts will be exposed when the terminal cover or main cover is removed.
Removal of the main cover invalidates the certification of certified meters.
Liquid Crystal Display
Liquid crystals are toxic. If a display is damaged, avoid contact with the liquid. If the liquid makes
contact with the skin it must be washed off immediately with water.
Seek medical advice.
3 COMPLIANCE WITH STANDARDS AND EUROPEAN DIRECTIVES
Meters are marked with the European CE mark, in accordance with the Marking Directive
93/68/EEC, to indicate compliance with the requirements of the EMC Directive 89/336/EEC.
Safety requirements for meters are addressed in specific metering standards outlined below.
The CE Mark does not denote compliance with the European Low Voltage Directive 73/23/EEC,
which specifically excludes electricity meters.
The A1100 meter measures active energy, according to the requirements of EN 61036 1996 (plus
amendment 1:2000) for indoor kWh meters of protective Class II and accuracy Class 1 or Class 2.
The degree of ingress protection is to IP53, IEC 60529:1989.
The meter complies with DIN 43857 Part 2 and Part 4 - dimensional requirements (except for the top
fixing centres).
4 APPROVALS
kWh energy meters are approved by the Office of Gas and Electricity Markets (OFGEM) in
compliance with European and British metering legislation.

Operating & Maintenance Instructions 5
5 INTRODUCTION
The A1100 is an electronic polyphase meter for domestic, commercial and light industrial CT or direct
connected applications.
Two main versions of the A1100 meter are available. The liquid crystal display version of the meter
can be supplied with one or two rates. The meter is available as import only or import and export.
The display has a customer defined display sequence that can include security information.
Chevrons and legends on the nameplate identify the data being displayed.
The stepper register version of the meter is available for kWh import one rate applications only.
Five LED's are used to identify the status of the meter/system.
Communication is provided via the IrDA (Infrared Data Association) port allowing the meter registers
and security data to be read electronically using a hand-held device. This greatly reduces the possibility
of manual meter reading errors. The meter can be configured at manufacture to provide the same
absolute serial data as the IrDA port via the meter auxiliary terminals.
As an alternative to serial data the auxiliary terminals can be configured at manufacture to give SO type
kWh consumption pulses.
Automatic Meter Reading (AMR) is facilitated by either the IrDA port, serial data stream or the pulsed
output. AMR allows the meter to be read remotely by either radio, mains signalling or over a telephone
line. Fast, accurate meter readings can be obtained for use in energy management systems.
Meters can be supplied to meet accuracy Class 1 or Class 2 requirements.
Features
•Accuracy - Class 1 or Class 2
•3 element or 2 element
•16 year product life
•Large figure display
•Extensive security data
•IrDA output for transmitting billing, security and status data
•12 kV isolation
•Compact design
•Double insulated polycarbonate case
•Conforms to DIN 43857 part 2 and part 4 (except for top fixing centres)
•IP53 in accordance with IEC 60529:1989
Options
•Liquid crystal display or mechanical stepper register
•One rate or two rates controlled by an external device
•CT or direct connected
•kWh import or kWh import and export (LCD version only)
•SO output or serial data output configured via the auxiliary terminals
•Extended terminal cover with or without cut-out (See Figure 6)

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6 GENERAL DESCRIPTION
6.1 Basic Meter Types
LB… DIN/BS Termination - 8.2mm bores
6.2 Current and Voltage Ratings
Unless otherwise indicated on the nameplate, all meter types are for use with 230V, 50 Hz systems.
A1100 Current (Standard) Current (Extended) Voltage
LBxA (direct connected) 20 - 100A (BS) 5 - 100A (BS) 220 - 240V
LBxB (direct connected) 10 - 60A (DIN) 5 - 85A (DIN) 220 - 240V
LBxC (CT operated) 5 -10A 1 - 2A 220 - 240V
6.3 System Connections
Meters can be supplied for direct connected or CT, 3 element (3 phase, 4 wire) or 2 element (3 phase
3 wire) applications and have the following connection capability:
Number of Elements Connection capability System Voltage (Nominal)
3 3 phase, 4 wire
2 phases of a 3 phase, 4 wire
2 phase, 3 wire
1 phase, 3 wire
1 phase, 2 wire (LCD version only)
220 - 240V Phase to Neutral
2 3 phase, 3 wire 220 - 240V Phase to Phase
Terminal Arrangements
Current Terminals
Auxiliary Terminals
8.2mm diameter bore, 2 x M6 Combi pinch screws
3.2mm diameter bore, M3 Combi pinch screws
Meter nameplates (see Figure 3 for example) are marked with the rated current, reference voltage,
frequency and relevant meter constant (pulses/kWh).
Connection diagrams (See Figure 5A for examples) are shown underneath the terminal cover.

Operating & Maintenance Instructions 7
6.4 Meter Configurations
LCD Meter
Single rate, kWh
Single rate, kWh import plus reverse (power flow insensitive)
Single rate, kWh with separate import and export registers
Two rate, kWh import
Two rate, kWh import plus reverse (power flow insensitive)
Two rate, kWh with separate import and export registers
Stepper Register Meter
Single rate, kWh import
Single rate, kWh import plus reverse (power flow insensitive)
6.5 Meter Accuracy
The A1100 meter measures active energy, in accordance with the requirements of EN 61036:1996
(plus amendment 1:2000) for indoor kWh meters of protective Class II and accuracy Class 1 or Class 2.
Typical accuracy curves are shown in Figure 4.
The meter's temperature coefficient is such that the error variation over the whole operating range is
well within the accuracy class.
The design of the meter ensures life long stability. There are no on-site adjustments.
6.6 Meter Case
The meter is supplied with an extended terminal cover. A terminal cover with a cut-out is available
as an option (See Figure 6). The terminal arrangements are shown in Figure 5 and Figure 5A.
The case is double insulated to protective Class II.
The case provides an ingress protection rating of IP53 in accordance with IEC 60529:1989.
The base is light beige coloured polycarbonate.
A separate phenolic terminal block conforms to DIN 43857 Part 2 and 4.
The terminal cover is moulded in light beige coloured polycarbonate.
The main cover is moulded in tinted, clear polycarbonate.
Figure 6 illustrates the outline and fixing dimensions.
The main cover is secured by two sealable screws. Two separate sealable screws secure the terminal
cover.

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7 TIME OF USE REGISTERS
The time of use input is controlled by an external timeswitch. Where an SO output is not provided,
access is available to both ends of the rate select circuit.
The contacts operate as follows:
a) External switch contacts open - rate select terminal open circuit
b) External switch contacts closed - rate select terminal connected to a phase conductor
See Figure 5 (auxiliary configurations) for connections to 3 phase 4 wire or 3 phase 3 wire meters.
According to customer requirement the meter can be configured during manufacture as follows:
Option 1 Option 2
a) Energy stored in Rate 1 register a) Energy stored in Rate 2 register
b) Energy stored in Rate 2 register or b) Energy stored in Rate 1 register
Following a successful rate change, further rate changes are held off for a 10 minute period.
To aid testing the meter, this mechanism is inhibited for either 1 minute or 1 hour (configured at
manufacture) after power up to allow any external rate select devices to be tested.
8 OVER VOLTAGE OPERATION
The meter has been designed to withstand a voltage of √3 x 1.1 Uref (i.e. 440V for 230V meters) for
an indefinite period. When tested over a 12 hour duration the change in meter error was less than
0.4%.
9 POWER FLOW INSENSITIVE MODE
Power Flow Insensitive Mode is an optional feature that allows the meter to increment its main kWh
register regardless of whether the meter is measuring import or reverse energy.
When this option is enabled, the pulsing LED indicates identically for both import and reverse.
The Reverse Energy Event Alarm, Reverse Energy Count and Reverse kWh Register respond only to
reverse power flow and continue to function as in normal operation. Power Flow Insensitive Mode is
enabled at time of manufacture.
Note: Power Flow Insensitive Mode may not be allowed in certain countries due to local regulations.
10 TEST INDICATOR & ANTI-CREEP
Test Indicator
A red test output LED is provided which pulses in accordance to the following configurations:
Import only meter - The LED pulses for forward energy only
Import meter with Power Flow Insensitive enabled - The LED pulses for forward and reverse energy
Import/export meter - The LED pulses for forward and export energy
For loads above import and export starting current, this gives 40ms pulses modulated at approximately
8kHz to provide improved detection by electronic meter test equipment.

Operating & Maintenance Instructions 9
Anti-creep
The Wh anti-creep threshold is set at manufacture to a value suitable for the number of elements in the
meter. The Test Indicator LED is continuously illuminated when the meter's anti-creep lock is
operating.
11 SECURITY FEATURES
Table 1 below shows security features for each meter type:
Table 1
Security Features
LCD Meter Stepper Meter
Event LCD* IrDA/
Serial LED IrDA/ Serial
Phase A Present (at time of reading) 9999
Phase B Present (at time of reading) 9999
Phase C Present (at time of reading) 9999
Reverse Event Count 999
Reverse Run Energy Reading 999
Reverse Alarm 99
Power Fail Count 999
Phase Fail Count 999
Elapsed Hours Rate 1 999
Elapsed Hours Rate 2 99
Elapsed Hours Cumulative Display 9
Meter Error 9999
Watchdog Reset Count 99
* Details of how the data is displayed are given in Section 12.3.
11.1 Data Retention
Registration and configuration data is saved to non-volatile memory every time the power to the meter
fails, every 2 hours and also on a rate change. The data is recovered when power is restored to the
meter.
All data is retained for the nominal life of the meter.
11.2 Phase Present/Phase Fail Indication
Phase indication has the following manufacturing options:
Phase indicator ‘on’ if phase is present (default) or ‘off’ if a phase is present
Phase threshold (default 80% of nominal phase value)
LCD Register Meter - The meter has three chevrons that give visible indication that phase A,
phase B and phase C are present.
Stepper Register Meter - The meter has three LED's that give visible indication that phase A,
phase B and phase C are present.
Note: The ‘B’ phase indication is not shown on 3phase 3wire meters.

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11.3 Recordable Security Features
The list of recordable security features indicates if the data/status is stored in the meter and can be
accessed in accordance with Table 1 (See Section 11).
11.3.1 Reverse Energy Flow
Reverse run event count
The meter detects and stores the number of reverse running events to a maximum of 255.
The register will then roll over to 1. An event is detected if, in a single occurrence, an amount of
reverse energy exceeding a programmable threshold (default 5Wh) is measured.
Two rate meters store a single count of reverse running events.
Reverse energy reading
Irrespective of whether the meter is set to import only or power flow insensitive mode, reverse kWh
power flow will be independently recorded.
Reverse energy Alarm (Import meter only)
The reverse run indication can be inhibited at manufacture if required. The indicator will remain
displayed until the meter is powered off.
11.3.2 Power Fail Count
A count of the cumulative number of power downs is stored to a maximum of 65,535.
The register will then roll over to 1.
11.3.3 Phase Fail Count
A count of the cumulative number of times any phase has failed is stored to a maximum of 65,535.
The register will then roll over to 1. (Phase failures are stored to non-volatile memory on a two hourly
cycle after power up).
11.3.4 Elapsed Hours - Rate 1 and Rate 2
Each complete hour the meter is active in Rate 1 and Rate 2 is recorded in separate registers.
11.4 Meter Errors
The A1100 detects and reports the following errors according to the meter type:
Error Type LCD Meter Stepper Register Meter
Hardware Er 00001 Meter Alarm
Configuration Checksum Er 00010 Meter Alarm
Billing Data Checksum Er 00100 Meter Alarm
Example: Er 00011 = Hardware error and Configuration checksum error.
In the unlikely event that any of the above meter errors occur, a catastrophic failure has been detected
and the meter should be returned to Elster Metering for failure investigation.

Operating & Maintenance Instructions 11
12 METER REGISTER AND DISPLAYS
The A1100 meter can be fitted with a mechanical stepper type register or a liquid crystal display.
Two rate meters and import/export meters are available only with the LCD meter.
12.1 Liquid Crystal Display
The LCD is a high contrast display that can be viewed from a wide angle. The display characters are
9.8mm high x 3.5mm wide. Nine chevrons identify displayed information. This identification is
marked on the nameplate and can be in any language. Typical display sequences and a quick reference
to display data are shown in Figure 7.
At power up the segment test pattern is shown. This will remain displayed for a period configurable
at manufacture (2 to 30 seconds) called the dwell time. The default dwell time is 6 seconds.
The display will then sequence through the programmed displays, remaining on each display item for
one ‘dwell time’.
Note: the values displayed are frozen for the dwell time - even if the source register increments.
kWh import
Reverse alarm/kWh export L1 L2 L3
Security Active
TOU 1
TOU 2
Dwell time - 2 to 30 seconds
Next Display
kWh Import Active

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12.2 Display Modes
The resolution of the display can be set at manufacture to 7, 6 or 5 digits. The decimal point indicator
can be configured to be a point or a comma and set to 0, 1 or 2 places.
Seven digit resolution to one decimal place Six digit resolution to one decimal place
Point separator Comma separator
Seven Digits Six Digits Five Digits
1 2 3 4 5 6 7
2 3 4 5 6 7. 8
3 4 5 6 7. 8 9
2 3 4 5 6 7 *
3 4 5 6 7. 8
4 5 6 7. 8 9
3 4 5 6 7
4 5 6 7. 8
5 6 7. 8 9
Internal storage is :- 1 2 3 4 5 6 7. 8 9 0
The display is a window of this. e.g. 1 2 3 4 5 6 7. 8 9 0
* (six digit register with no decimal points).
12.3 Displayable Data
The chevrons on the display have the following meaning:
kWh import currently displayed
kWh export currently displayed (or reverse alarm)
L1 - Phase A present/failed
L2 - Phase B present/failed
L3 - Phase C present/failed
Security data
Active rate – Rate displayed is currently active
TOU 1 currently displayed
TOU 2 currently displayed
kWh import
Reverse alarm/kWh export L1 L2 L3
Security Active
TOU 1
TOU 2

Operating & Maintenance Instructions 13
kWh import
Reverse alarm/kWh export L1 L2 L3
Security Active
TOU 1
TOU 2
The following data items may be included in the display sequence, in the order shown.
Segment Test Pattern
The test display is always displayed at power up.
All segments should be 'on'.
The test pattern is optional in the display sequence.
Dial Test
Dial test can be displayed as a manufacturing option for the first
one hour or two hours after power up. Dial test mode is a meter
calibration aid that shifts the register two decimal places to the
left.
Normal 1 2 3 4 5 6 kWh
Test 3 4 5 6. 7 8 kWh
The mode is displayed for import kWh (import only meters) or import and export kWh
(import/export meters).
Import/Export Meter
Displayed Chevrons Action
1 - kWh Import Dial test for kWh import
2 - kWh Export Dial test for kWh export
kWh Import
One or two rate meters are available. The active chevron (7) and the TOU chevrons are not used for a
one rate meter.
1 Rate Meter
kWh
Displayed Chevrons Action
1 - kWh import Import kWh

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2 Rate Meter
kWh, Rate 1, Active kWh, Rate 2 kWh, Cumulative
Displayed Chevrons Action
1 - kWh Import
7 - Active
TOU 1
TOU 2
TOU 1 and TOU 2
Import kWh
The rate displayed is currently active
TOU 1 import kWh register reading
TOU 2 import kWh register reading
Cumulative (TOU 1 plus TOU 2) register reading
Import/Export Meters
One or two rate import/export meters are available. The chevron action is identical to the import only
meter with the exception of chevron 2 that identifies export energy.
Single Rate
kWh Export
Displayed Chevrons Action
2 - kWh export Export kWh
2 Rate
kWh Export, Rate 1 Active kWh Export, Rate 2 kWh Export, Cumulative
Displayed Chevrons Action
2 - kWh Export
7 - Active
TOU 1
TOU 2
TOU 1 and TOU 2
Exporting kWh
The rate displayed is currently active
TOU 1 export kWh register reading
TOU 2 export kWh register reading
Cumulative export kWh (TOU 1 plus TOU 2) register reading

Operating & Maintenance Instructions 15
Phase Present/Phase Failure
Three Chevrons are used to indicate if a phase is present or failed. Chevron 3 (phase A), chevron 4
(phase B) and chevron 5 (phase C) can be programmed at manufacture to be 'on' (default condition) if
a phase is present or to be 'off' when a phase is present. The number of times a phase has failed is also
stored (see phase fail counter).
Chevrons programmed to be 'on' when a phase is present (3 phase 4 wire meter)
Phase B failed Phase C failed Phase B and C failed
Note: For 3 phase, 3 wire system (only two phases being used), chevron L2 (phase B) is not used and
is not marked on the meter nameplate.
Phase Failure and Security Data
Elapsed Time
Each full hour the meter has been active in Rate 1and Rate 2 is recorded and can be included in the
display sequence. The cumulative (Rate 1 + Rate 2) can also be included in the display sequence.
Note: After 99,999 hours (11.4 years) the counter will continue to increment normally but the display
will appear to wrap to zero.
Time in Rate 1 Time in Rate 2 Cumulative Time
Displayed Chevron Reference Indicator Action
6 - Security 1 Time in Rate 1
6 - Security 2 Time in Rate 2
6 - Security 3 Cumulative Hours
Reverse Run
For import only meters, chevron 2 (Reverse alarm) is illuminated and locked on the display if a
reverse run event is detected. The reverse run alarm is cleared when the meter is powered down.
A count of the number of reverse run events (up to 255) and the amount of energy consumed when
the meter is in reverse can be included in the display sequence. Note that for energy consumed the
display is truncated to five digits.

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Reverse alarm set Count of reverse events Reverse energy consumed
Reverse alarm set Reverse alarm cleared
Displayed Chevron Reference Indicator Action
2 - Reverse alarm - Reverse run event detected
6 - Security 4 Count (maximum 255) of reverse run events
6 - Security 5 Amount of energy consumed in reverse
Power Fail Count
A Power Fail Counter is incremented each time the meter is powered up. This count (maximum 65535)
can be included in the display sequence.
Displayed Chevron Reference Indicator Action
6 - Security 6 Power Fail Counter
Phase Failure Count
Each time a phase failure is detected a counter is incremented. This count (maximum 65535) can be
included in the display sequence.
Displayed Chevron Reference Indicator Action
6 - Security 7 Phase Failure Counter

Operating & Maintenance Instructions 17
12.4 Display Multiplier (CT operated meters)
The CT operated meter does not allow a CT ratio to be entered into the meter, only a transformer
secondary value. To calculate the actual meter reading the displayed value must be multiplied by the
transformer ratio.
12.5 Meter Errors
LCD Meter
Errors for the LCD meter are shown in the following format:
Error Description
Er00001
Er00010
Er00100
Hardware error
Configuration checksum error
Billing data checksum error
The example shows 'Configuration Checksum error'.
If an error has occurred it will be displayed after each normal display in the display sequence.
If no errors exist the display is skipped.
There is an option to disable the error display.
12.6 Mechanical Stepper Type Register
Stepper Meter Register
The mechanical stepper register has 7 number wheels, with
digits 6.7mm high x 3.5mm wide. The most significant digit of
the register can be blanked off by fitting a special nameplate to
the meter at manufacture. Nameplate information can be in any
language.
The register has 1/10 kWh resolution for direct connected
meters and 1/100 kWh resolution for CT connected meters. The
decimal point number wheels are red.
Seven number wheels: 1 2 3 4 5 6. 7
1 2 3 4 5. 6 7
Six number wheels: 2 3 4 5 6. 7
2 3 4 5. 6 7

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13 COMMUNICATIONS
Communications to external equipment is provided via the IrDA (Infrared Data Association)
communications port. There is an option to provide the same absolute data via the auxiliary terminals.
13.1 IrDA Communications
The IrDA (Infrared Data Association) communications port provides one way communications,
continuously transmitting a data stream from the meter to an external device. The data stream
includes a start and end mechanism, ensuring only a complete stream of data is recorded.
An error-checking algorithm protects the integrity of the data stream. The data stream uses the OBIS
data format (see Appendix A for a description of the data format).
IrDA communications offer low cost, low power consumption and high noise immunity.
A manufacturing option allows the port to be set to transmit at one the following baud rates: 2400
(default rate), 4800 or 9600. The port will transmit over a distance of 250mm.
A typical device to read the IrDA output is a Laptop Computers with a communications probe or a
PDA with an IrDA interface.
13.2 Optional Serial Data Port
The auxiliary terminals can be configured at manufacture to transmit the same absolute data stream
as the IrDA port. The format of the data steam (See Appendix A) is non-standard 'return to zero' and
requires the use of a special external interface. If this option is used the baud rate is the same for both
ports and can be set to either 2400 or 4800 baud. The port will transmit over a distance of up to 3m.