Landis+Gyr E470 Series User manual

Electricity Meters
Residential BS / MID
British Standard
E470 Tokenless Smart Prepayment
Meter
User Manual & Technical Specification
Date: 18.01.2010
Filename: 5236 User Manual Version 1.8.docx
Q Pulse Number: IB090
© Landis+Gyr

Page 2 of 69 Issue: 1.8 Revision History
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
Revision History
Issue
Date
Comments
1.0
21.05.07
Initial release for Approval bodies
1.1
19.06.07
Amendments to meet approvals specification
1.2
26.06.07
2nd round of amendments to meet approvals specification
1.3
20.07.07
Further addition to the data sheet to cover LVD requirements
1.4
03.08.07
Further additions at section 1.4 and to the data sheet to satisfy TUV
requirements
1.5
04.09.07
Supply cabling specification added to section 1.7
1.6
24.10.07
Signal strength comments added at section 6.2
1.7
19.11.08
Revised manual to new branding guidelines and layout
1.8
14.09.09
Addition of features to support 5236J-Y functionality
Copyright notice
The material in this document is the property of Landis+Gyr. Our products are under continual
improvement and we reserve the right to make changes without prior notice.
Landis+Gyr
1 Lysander Drive,
Northfields Industrial Estate,
Market Deeping,
Peterborough
PE6 8FB
www.landisgyr.com

Table of Contents Issue: 1.8 Page 3 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
Table of Contents
1Introduction____________________________________________________________ 6
1.1 Scope___________________________________________________________________6
1.2 Purpose _________________________________________________________________6
1.3 Target Group_____________________________________________________________6
1.4 Intended Use and Installation________________________________________________6
2Safety Information ______________________________________________________ 7
2.1 Responsibilities ___________________________________________________________7
2.2 Safety Regulations_________________________________________________________8
3Functional Overview ____________________________________________________ 9
3.1 Meter Description _________________________________________________________9
3.2 Metrological Functions______________________________________________________9
3.3 Temperature ____________________________________________________________10
3.4 Real Time Clock__________________________________________________________10
3.5 Faceplate Details _________________________________________________________11
3.6 Customer Display_________________________________________________________11
4Meter Operation _______________________________________________________ 12
4.1 Energy Registers _________________________________________________________12
4.2 Push Button Operation ____________________________________________________12
4.3 Buzzer Operation_________________________________________________________13
4.4 Tamper Detection ________________________________________________________14
4.5 Normal SIM Card Removal _________________________________________________15
5Installation and Binding of External Devices ________________________________ 20
5.1 Binding Process __________________________________________________________20
5.2 Decommissioning_________________________________________________________24
6Commands and meter data ______________________________________________ 26

Page 4 of 69 Issue: 1.8 Table of Contents
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
6.1 Ad hoc (Immediate) Reads ________________________________________________ 26
6.2 Change of Tenancy/Supplier _______________________________________________ 26
6.3 Supply Restoration_______________________________________________________ 28
6.4 Profiling _______________________________________________________________ 28
6.5 Scheduled Reads ________________________________________________________ 29
7Tariff Features _________________________________________________________ 31
7.1 Time-Of-Use Tariff _______________________________________________________ 31
7.2 Block Tariff_____________________________________________________________ 32
7.3 Price-Per-Unit Tariff Plan __________________________________________________ 34
7.4 Examples of Tariff types __________________________________________________ 35
7.5 Standing Charge_________________________________________________________ 35
7.6 Effective Date/ Future Tariff _______________________________________________ 36
8Prepayment and Accounting Functions ____________________________________ 40
8.1 Credit Mode ____________________________________________________________ 40
8.2 Present Balance Register __________________________________________________ 40
8.3 Payments Log___________________________________________________________ 40
8.4 Total Credit Register _____________________________________________________ 41
Cost Registers____________________________________________________________________ 41
8.5 Friendly Non-disconnect___________________________________________________ 41
8.6 Customer Cards _________________________________________________________ 42
8.7 Emergency Credit________________________________________________________ 42
8.8 Standing Charge Register/Collection _________________________________________ 43
8.9 Debt Repayment ________________________________________________________ 44
8.10 Currency Conversion _____________________________________________________ 45
9Meter Displays _________________________________________________________ 46
9.1 General________________________________________________________________ 46
9.2 Icons__________________________________________________________________ 47

Table of Contents Issue: 1.8 Page 5 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
9.3 Present Balance Register___________________________________________________47
9.4 Present Balance, Emergency Credit Available___________________________________48
9.5 Present Balance, Emergency Credit in Use_____________________________________49
9.6 Active Rate Display _______________________________________________________49
9.7 Payment Received________________________________________________________49
9.8 Display Cycle Options _____________________________________________________50
9.9 Purchase Code Entry______________________________________________________56
9.10 Installation______________________________________________________________57
10 Wiring Diagram ________________________________________________________ 60
11 Data Sheet ____________________________________________________________ 61
12 Meter Drawing _________________________________________________________ 62
13 Maintenance and Service ________________________________________________ 63
13.1 Meter Check_____________________________________________________________63
13.2 Meter Testing____________________________________________________________63
13.3 Post Installation Configuration Changes_______________________________________63
14 Measures in the Event of Faults __________________________________________ 64
14.1 Operating Faults _________________________________________________________64
14.2 Disconnecting the Meter ___________________________________________________64
14.3 Repairing the Meter_______________________________________________________64
15 Decommissioning and Disposal __________________________________________ 66
16 Glossary of Terms and Standards ________________________________________ 67
16.1 Acronyms_______________________________________________________________67
16.2 Measurement Units _______________________________________________________67
17 Declaration of Conformity _______________________________________________ 68
18 Glossary of Terms _____________________________________________________ 69

Page 6 of 69 Issue: 1.8 Introduction
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
1 Introduction
1.1 Scope
This user manual applies to the British Standard 5236J-Y SMS messaging
Tokenless prepayment meter.
1.2 Purpose
This manual contains all information required for the application of the
meters for the intended purpose. This includes:
 Characteristics, construction and functionality of the meters.
 Information about possible dangers, their consequences and
measures on how to prevent them.
 A detailed description of the tasks to be performed during the
entire life-cycle of the meters (configuration, installation,
commissioning, operation, maintenance, and disposal).
1.3 Target Group
The contents of this user manual are intended for technically qualified per-
sonnel of energy supply companies responsible for system planning,
installation and commissioning, operation, maintenance, decommissioning
and disposal of the meters.
1.4 Intended Use and Installation
The 5236 meters record active energy consumption in single phase two
wire networks. For this purpose they are directly installed in the supply line
by the energy supply company and are read regularly for energy charging
purposes. They are used according to the technical specifications stated in
the respective data sheets and below.
The meter is intended for installation in a residential environment by
qualified personnel. The meter conforms to British Standard in its
mechanical specification and is suited to installation in any situation that
also meets this standard. The meter must be installed away from powerful
sources of electromagnetic interference.
There are no user serviceable parts within the meter and the meter must be
returned to the manufacturer or an authorized partner for repair and/or
maintenance. There are no permissible adjustments to meter installation
procedure or meter operation outside those covered by the detailed
operational instructions contained within this document.
If the equipment is used in a manner not specified by the manufacturer the
protection provided by the equipment may be impaired.

Safety Information Issue: 1.8 Page 7 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
2 Safety Information
Attention is drawn as follows in the individual chapters of this user manual
with classified word symbols and pictographs to the relevant danger level,
i.e. the severity and probability of any danger:
Definition of Danger
This symbol is used to indicate a possibly dangerous situation which could
result in severe physical injury or a fatality.
Definition of Warning
This symbol is used to indicate a possibly dangerous situation which could
result in minor physical injury or material damage.
Definition of Note
This symbol is used to indicate general details and other useful information.
In addition to the danger level, all safety information also describes the type
and source of the danger, its possible consequences and measures to
counteract the danger.
2.1 Responsibilities
The owner of the meters – normally the utility – is responsible that all
persons engaged on work with meters:
 Have read and understood the relevant sections of the user
manual.
 Are sufficiently qualified for the work to be performed.
 Strictly observe the safety regulations and the operating
information in the individual chapters.
In particular, the owner of the meters bears responsibility for the protection
of persons, prevention of material damage and the training of personnel
(Landis+Gyr. provides training courses for this purpose on specific
equipment; please contact the relevant agent if interested).

Page 8 of 69 Issue: 1.8 Safety Information
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
2.2 Safety Regulations
The following safety regulations must be observed at all times:
 This equipment does not contain a disconnection device. Means
for disconnection from the supply must be provided as part of the
building installation. Do not work on the equipment unless the
supply is disconnected. If disconnection is done by removal of
fuses or other cut-outs, the removed disconnection devices must
be kept secure from replacement while work is performed. If
disconnection is provided by a switch, the switch shall conform to
the requirements of IEC 947-1 and IEC 947-3 or equivalent.
 This equipment does not contain an overcurrent protection device.
Overcurrent protection must be provided as part of the building
installation. Maximum overcurrent device rating is 100 Amp at 415
Volts, conforming to the requirements of BS1361, or equivalent.
 The maximum rating of the meter is 100A and requires connecting
conductors of 25mm2. Failure to do so could result in irreparable
damage to the meter. If smaller connecting conductors are used an
appropriate mains fuse must be used.
 Only suitably trained and qualified personnel shall be allowed to
work on the equipment. Local safety standards shall be observed
and shall take precedence over these regulations in points of
conflict.
 The meters must be held securely during installation. They can
cause injuries if dropped.
 Meters that have fallen must not be installed, even if no damage is
apparent, but must be returned for testing to the service and repair
department responsible (or the manufacturer). Internal damage
can result in functional disorders or short-circuits.
 The meters must on no account be cleaned with running water or
with high-pressure devices. Water penetrating can cause short-
circuits.
 The meter terminal cover should be secured in place before any
load is supplied.

Functional Overview Issue: 1.8 Page 9 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
3 Functional Overview
3.1 Meter Description
The meter requires a single phase, two wire mains supply with a reference
voltage of 230V, 50Hz. The meter is rated at 10, 15, or 20 – (100) Amps
registering kWh to class B (MID). The meter’s internal measurement
coefficient is 1 and therefore does not affect the supply’s phase angle.
The meter is fitted with a 100A contactor for the disconnection of supply
operating automatically when prepay credit has expired or by manual
command in the event of a change of tenancy, for instance.
The meter is fitted with a single pole, normally open, voltage free relay
rated at 230V 2A at unity and 0.5pf. This relay is internally controlled by
time-of-use switches and may be used to control an ancillary circuit.
The meter is fitted with a GSM modem and will use SMS messaging to
receive credit transactions, tariff and configuration updates. It may provide
periodic scheduled reads and additionally ad hoc reads of register values
and other data on command.
The meter features energy registers for four rates and one total export
energy register. The meter may be configured to maintain time-of-use
tariffs, block tariffs or complex combinations of the two.
The meter is fitted with a standard IEC1107 optical port for factory and on
site programming as necessary.
Additional features include but are not limited to:
 Half Hour Profiling – configurable on/off as required
 Prepayment accounting in £ and €
 Cost per hour & usage calculations + display
 Tamper reporting
 Display of data with a liquid crystal display (LCD).
3.2 Metrological Functions
The current measurement is based on shunt technology.
The microprocessor receives the measured analog signals (U and I)
through an A/D-converter. It determines the energy direction and calculates
the energy which is subsequently processed in accordance with the meter
constant and fed to the relevant rate register determined by rate control.
The microprocessor also controls the data communication with the display
and serial interface and ensures a safe operation in the event of a voltage
failure.
The entire meter’s data is recorded in a Ferro-electric Random Access
Memory (FRAM) under the control of the microprocessor. All kWh registers
are stored in the FRAM and are updated every 1/100th of a kWh. The

Page 10 of 69 Issue: 1.8 Functional Overview
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
FRAM is capable of a minimum of 10,000,000,000 write cycles and does
not require power to maintain the stored data.
To indicate active energy usage the meter is fitted with a single red LED.
When registering energy the LED will flash at a rate of 1 pulse per Wh of
energy recorded (1000 pulses kWh). Each pulse shall have an on time of
20 mS. The metrology LED will be configurable to show forward or reverse
energy consumption for test purposes. The metrology LED will be
permanently on when creep lock is active.
3.3 Temperature
The operating temperature range is –25°C to +55°C.
The storage temperature range is -30°C to +85°C.
3.4 Real Time Clock
The Meter has a real time clock, optionally configurable to synchronise to
the mains frequency in normal operation. When the meter is configured for
mains synchronisation, the clock shall maintain the same stability as that of
the mains, i.e. within ±30 seconds/year.
During periods of power failure the time shall be maintained by an internal
battery powered, crystal controlled clock. In battery backed mode the
accuracy shall be maintained to within 15 minutes/year at a temperature of
20°C.
The time is displayed in 24-hour mode.
The meter operates on GMT with the option to operate with scheduled
changes for British Summer Time (BST) applied to customer timed
functions, i.e. Tariff Switching Times, No-Disconnect Period and the clock
displays in Customer Displays.
The meter may be configured to remain in GMT throughout the year with no
change for DST.
If configured to operate with DST changes, during the BST period the meter
shall display the BST clock time, the rate-switching matrix and any timed
events shall operate on the BST time clock.
DST setting is configurable allowing standard European settings or any
other combination of DST settings. Configurable settings:
 Start and end calendar month
 Start and end week, first –forth or last
 Start and end day
 Start and end time
 Adjustment hours
The real time clock may be set using the optical port.

Functional Overview Issue: 1.8 Page 11 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
3.5 Faceplate Details
In addition to meter type and metrological markings according to MID
requirements, the meter faceplate will show register names below the
triangle indicators on the display. The faceplate will show the following
register names:
Additionally the functions of the two buttons fitted to the front of the meter
are described:
The meters serial number and barcode will be laser marked onto the front
of the meter case. Serial numbers are allowed with up to 16 characters.
3.6 Customer Display
The meter is fitted with a custom display providing 4 starburst characters
and 7 seven-segment characters. The display has a backlight. Separate
icon will indicate currency and kWh units. The display will provide an
indication of GSM signal strength. Pointers along the bottom edge will link
with the facia artwork to show which parameters are being displayed.
Cycle
Display
Emergency
Credit
Purchase
Code Press
Press & Hold
+

Page 12 of 69 Issue: 1.8 Meter Operation
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
4 Meter Operation
4.1 Energy Registers
Display of energy registers is configurable to show 5 or 6 whole numbers.
All energy registers are configurable to show between 0 and a maximum of
2 decimal places (up to 1 decimal place with 6 whole numbers).
All energy registers are displayed with leading zeros.
All energy registers will roll over from 99999.99 to 00000.00 kWh.
(999999.9 to 000000.0 when set to 6 whole numbers.
All energy registers are incremented for every 1 Wh of forward energy
consumed.
The meter will record reverse or export energy into an export energy
register, [configurable option].
The meter has up to 4 time-of-use registers. Each TOU register will
become active according to the TOU switching plan configured into the
meter.
4.2 Push Button Operation
The meter is fitted with two push buttons as described in section 2.5. The
left hand blue button is used for stepping thru the meters’ display cycle.
Each press will advance the configured display sequence by one display.
If the display sequence has been partially cycled and the push button is not
pressed for 30 seconds the display sequence will revert to the default
display.
The right hand orange push button shall be used to evoke the Emergency
Credit feature.
4.2.1 Payment Code Entry
The transfer of payments is made by sending a 20 digit encrypted code to
the meter. Normally this would be transferred by SMS messaging, however
in cases such as the communication system is unable to send the top-up to
the meter, a secondary method for transfer is available.
In normal commissioned operation the meter will allow the customer to
enter the purchase code using the two push buttons on the meter. The
entry process is detailed in the section Meter Displays 6.9.
When expecting a purchase code the meter allows a maximum of {20}
digits to be entered.
If the code entered is successful the meter shows the value of the purchase
on the display.

Meter Operation Issue: 1.8 Page 13 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
The meter will allow codes to be re-entered for up to 10 minutes and will
allow the entry of 5 sets of invalid codes. If a valid code is not entered after
a total of 10 minutes, or 5 invalid attempts are made during this period, the
display will revert back to the Default Operating display. If 5 invalid entries
are made the facility will be locked out until the next hour.
The meter will allow a maximum of 5 sets of Payment code entries in a
24hr period.
Example
1pm:
Enter invalid code 5 times
Must wait until 2pm before allowed to re-enter code
2pm
Enter invalid code 5 times
Must wait until 3pm before allowed to re-enter code
3pm
Enter invalid code 5 times
Must wait until 4pm before allowed to re-enter code
4pm:
Enter invalid code 5 times
Must wait until 5pm before allowed to re-enter code
5pm
Enter invalid code 5 times
Facility locked out until 00:01 next day
If no button presses are detected after 60 seconds the display will revert
back to the normal operating display.
4.2.2 Installation and Binding
A further use of the code entry mode is to instigate the binding process for
external devices or an installation mode.
When instigating these processes a 6 digit pin is entered into the first 6
digits of the payment code. If the entered pin corresponds to one of the
configured pins then the meter will enter the appropriate mode. See
installation section.
4.3 Buzzer Operation
The meter uses an audible buzzer to indicate to the consumer the following
events:
 Low Credit warning
 Valid Button press
 Incorrect Entry of Purchase Code.
4.3.1 Low Credit Warning
The Low credit warning will operate when the Present Balance register
value falls below the Emergency Credit Availability point and Emergency
credit is available.
If the Present Balance register falls below the Emergency Credit Availability
point during a Non-Disconnection period, the Low credit warning will be
suspended until the Non Disconnection period has ended.

Page 14 of 69 Issue: 1.8 Meter Operation
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
For low credit warning the buzzer shall sound for 30 seconds followed by 2
second beeps every 30 seconds for total of 5 minutes.
The low credit warning is stopped if the Display Cycle button is pressed.
The Low Credit Warning is a configurable item and may be disabled.
4.3.2 Valid Button Press
The buzzer sounds a short beep each time a valid Display Cycle button
press is made.
The valid button press beep is a configurable item and may be disabled.
4.3.3 Invalid Purchase Code
If an Invalid Purchase Code is entered, the meter will give a 1 second beep
to signify the code is incorrect.
4.4 Tamper Detection
The meter includes several anti tamper features.
4.4.1 Reverse Energy Detection
If the meter is configured to operate in a reverse energy fraud detection
mode the meter will alternate a warning message on the display should a
fraud attempt be made by running current backwards through the meter.
The reverse energy-warning message is triggered when the reverse power
exceeds a programmable threshold level of between 1-10 Amps for a
period of 10Wh. A reverse energy event can optionally be communicated to
the utility information system immediately or returned with scheduled read
meter status.
The meter will store the number of RED tamper events detected together
with the time and date of the last recorded event.
Once triggered the reverse energy-warning message can only be reset by a
command programmed either via the IEC 1107 port or by SMS message.
4.4.2 SIM Card Removal Detection
The meter is fitted with two detection devices to protect the SIM card fitted
to the meter. An initial detection device monitors the opening of the flap
covering the SIM aperture. A second detector monitors the movement of
the SIM carriage outwards from the meter. The sim carriage detection
circuit operates when on or off supply. On triggering of either detector, the
meter stores the number of SIM tamper events together with the time and
date of the last event. On the event of a tamper event the meter will enact
all, any one or none [configurable] of the following actions:

Meter Operation Issue: 1.8 Page 15 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
 Visually display a tamper detection message; see Meter Display
section.
 If the meter is on supply; the opening of the SIM flap may be
reported to the utilities information system by instantly sending an
SMS message.
 Optionally the meter may be configured to open the main
contactor.
Resetting of the tamper flag/supply reconnection can be achieved by
system command or using the meter optical port.
4.5 Normal SIM Card Removal
In normal operation the SIM card may be ‘hot’ swapped by the utility
without disconnecting the supply to the meter and the customer. Upon
opening the main SIM flap the meter may send a tamper message as
described in Tamper detection (if configured); following the sending of the
message the meter will power down the SIM ready for removal. The meter
indicates that the SIM may be removed by flashing the signal strength
symbols on the display. Upon replacement of the SIM and closure of SIM
flap the meter will reenergise the device and the meter will send the new
SIM number to the utilities information system. The message will consist of
Meter serial number, SIM number and MPAN.
4.6 Operational modes
The E470 meter can be configured to operate in several different
operational modes that can be implemented remotely. The following section
details the operational modes that are supported by the meter.
4.6.1 Credit mode
The meter can be configured to operate in credit mode. In this mode of
operation the meter will not open the contactor (unless instructed) and will
ignore any credit values sent to the meter. When in credit mode the default
operating meter display is the active register display.
4.6.2 Prepayment mode
The meter can be configured to operate in prepayment mode. In this mode
of operation the meter will open the contactor when the credit value in the
meter falls below a zero value. To close the contactor the meter requires a
payment to be made to suffice any negative balance registered on the
meter. When in prepayment mode the default operating meter display is the
remaining credit display.
4.6.3 Single wallet mode
The meter can be configured to operate in a single wallet mode. In this
mode of operation the meter will use the value of credit held in the present
balance register for collection of both gas and electricity usage. The
electricity meter reduces the present balance for gas usage on receipt of
each ½ hour message from the gas meter using the gas cost today data.

Page 16 of 69 Issue: 1.8 Meter Operation
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
When the present balance register falls to zero, the meter will send a pass
through message to the gas meter to close its valve and disconnect the gas
flow. The electricity meter will also open its own contactor.
Accounting in single wallet mode
The meter receives cost data from the gas meter in the form of a Gas Cost
since Start of Day on each ½ hour and daily in the form of a Day’s Gas
Cost value, received at midnight.
The meter uses the received Gas Cost since Start of Day value to reduce
Present Balance for gas usage every ½ hour.
The Gas Cost since Start of Day value is a rising value of cost since the
start of the day, reset each midnight.
Example:
the meter calculates a particular ½ hours usage in the following manner:
 The meter stores a value of the gas cost since start of the day
 At midnight the stored value will be reset
 When a new value is received the stored value is subtracted from
the new value to gas the last 30 minutes usage. The present
balance register is reduced by the calculated value.
 The original stored value is overwritten with the new value.
The meter records the total value collected from the Present balance
register through ½ hourly messages, to enable reconciliation to the Day’s
Gas Cost value. This is recorded daily for a rolling 28 days, and ca
recorded as extra data within the gas daily profile held within the electricity
meter.
As there is the possibility of a ½ hourly message being missed a
reconciliation process will be made against the Day’s Gas Cost value
received each day or as part of the data catch up process. The Day’s Gas
Cost value will be considered as the master value. On receipt of the Day’s
Gas Cost value the meter reconciles the amount for the appropriate day
against the recorded amount collected through the ½ hourly messages.
£
00:00 00:30 01:00 01:30 02:00 02:30 03:00 03:30
. . .
Cost since start of day
value (rising)
30 min value

Meter Operation Issue: 1.8 Page 17 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
Present balance register in single wallet mode
The present balance register within the electricity meter holds the credit or
debt value for both gas and electricity usage. Electricity costs are taken in
the normal way, gas costs are taken as described in 7.4.2. Emergency
credit may be applied in the normal way.
Supply disconnect/reconnect in single wallet mode
After a disconnect and when credit is next added, sufficient to place the
meters back into prepaid credit the following occurs:
 The meter will allow the customer to reconnect the electricity
supply using the button on the front of the meter.
 The meter will generate a pass-through message for the gas meter
to request instantaneous gas reconnect. The message will be
passed on the next 30 minute boundary.
 The meter will cancel any unsent disconnect pass-through
messages on receipt of a payment message, sufficient to place the
meter back in prepaid credit.
4.6.4 PAYG mode
The meter can be configured to operate in pay-as-you-go (PAYG) mode. In
this mode of operation the meter will not disconnect at zero but will allow
the user to accumulate a certain amount of debt. Providing that the user
keeps within an agreed amount of debt supply will remain connected for the
customer.
To support this mode the meter can be configured to hold a PAYG
disconnection value, the value has a range of 0 to -500 (debt).
When operating in PAYG mode, the meter will disconnect supply when the
present value in the meter falls below the configured PAYG disconnection
value.
Emergency credit operation is disabled by configuration when using the
PAYG mode, debt recover will still operate as normal.
4.6.5 Gas Credit mode
The meter can be used to configure the operating mode of a paired gas
meter. Using this mode the mode of the gas meter can be switched
between prepayment and credit operation. A request to change the mode
of operation for the gas meter can take upto ½ an hour as the request is
dependant on a pass through message to perform the request.

Page 18 of 69 Issue: 1.8 Meter Operation
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
4.7 Load limiting
The meter supports a load limiting function which when in operation will
provide the user with only a limited supply.
The meter is enabled to operate in Load Limit mode by configuration and
may operate in conjunction with credit, prepayment or PAYG modes.
When enabled and while the meter is operating in Prepayment mode, load
limiting shall only become active when the present balance falls below zero.
When active the usual switching of supply is overridden by the load limiting
function.
When operating in PAYG mode load limiting shall only become active when
the present balance falls below the PAYG Disconnection value. Supply
disconnection is overridden by the load limiting function.
The meter is configured with a Load limit value that has an operating range
of 0 - 24.00kW
When load limiting is in operation the following display will be alternated
with the normal operating displays:
£
Pence/ kWh
€
L I M It i n g o n
When Load limiting is enabled the meter will maintain the contactor in a
closed position while the measured power (kW) is below the Load Limit
value.
When the measured power exceeds the Load Limit value supply will be
disconnected and contactor opened. On disconnection the display will show
the OFF message for [5] seconds, followed by the PUSH BUTTON
message. The supply will then be made available for reconnection.
On pressing the meters push button the contactor will be closed and supply
reconnected. Load is again measured. If part of the load has been
removed and remains under the Load Limit value the supply will remain
connected. If the measured load again exceeds the Load Limit value supply
will again be disconnected.

Meter Operation Issue: 1.8 Page 19 of 69
E470 Tokenless Smart Prepayment Meter © Landis+Gyr
Load limiting example:
The load limit value for the customer is set at 5kW. When the customer
exceeds the threshold value in the first instance power supply is cut.
Customer reduces load and power can be reconnected. When the
customer exceeds the value in the second instance, the customer again
has to reduce household load to reconnect power.
1
0
2
3
4
5
6
7
8
Load Limit threshold
Customer usage pattern
kWh
usage
Value exceededXX
Value exceeded

Page 20 of 69 Issue: 1.8 Installation and Binding of External Devices
© Landis+Gyr E470 Tokenless Smart Prepayment Meter
5 Installation and Binding of External Devices
The installation process is in two parts; joining the metering components
together by a binding process and notification of the metering system to the
head End System. An automated notification process exists within the
meter however this may not be supported by the HES. Where the
automated process is not supported a manual method would be employed.
This section describes the automated process only.
5.1 Binding Process
The binding process is used to join devices to the electricity meter. Once
bound, the devices will ignore transmissions from any other meters within
the vicinity. The units will remain in this state until rebound.
During the process the devices exchange communication addresses and
security keys, logging serial number into the electricity meter. These serial
numbers are in turn displayed on the In-home display to provide
confirmation to the installer.
A remote process is available to prevent meters communicating when not
required (i.e. loss of gas supply contract).
5.1.1 Binding and installation mode code entry
Both binding and automatic installation processes use a 6 digit PIN to
instigate a particular process with the meter. The meter holds a record of 3
PIN’s
Action
Display
Button Actions
Press and hold both push
buttons on the front of the
electricity meter until the
display shows:
£
Pence/ kWh
€
C O D E0 0 00
Hold both buttons.
The active number in the
code sequence is shown
as a flashing digit. To
increment the number
press the blue button, the
number will increase from
0 though to 9 then back to
0
£
Pence/ kWh
€
C O D E1 0 00
Press blue button
to increment the
number .
To move to the next
number in the sequence,
press the orange button.
The sequence will move
one digit to the left and
the active digit shown
flashing. If an error is
made in entering a
£
Pence/ kWh
€
C O D E1 0 0 00
Press orange
button to move to
next digit.
Press and hold
orange button to
step backward to
previous digit