Tutorial

SMETS1 Secure Liberty 100/110 smart meter guide for WAN, HAN, lights and buttons: DIY tutorial series

  • 14 September 2020
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SMETS1 Secure Liberty 100/110 smart meter guide for WAN, HAN, lights and buttons: DIY tutorial series
Userlevel 7

Updated on 08/09/21 by Jess_OVO

 

SMETS1 Secure smart meters - your guide

 

This guide is about S1 Secure Liberty 100/110 smart meters. If you have an Aclara S1 smart meter, check our guide here. For information about how S2 meters communicate, please see this guide 

 

What do the buttons on the keypad do?

1 - Displays cost of consumption and units used on the current day and previous day
2 - Displays cost of consumption in the current week and previous week
3 - Displays cost of consumption in the current month and previous month
4 - Displays historical data comprising monthly units consumed and cost of consumption
- Displays ‘Not Used’
- Displays tariff name, standing charge per day, active rate register(s) along with the consumption and cost per unit recorded in each rate register (Will provide Eco-7 readings: IMP R01 is the night read, and IMP R02 is the day read)
7 - Displays ‘Not Used’
8 - Displays ‘Not Used’
9 - Displays total import and export register values (will provide a total reading after IMP KWH)
0 - Performs display check and then displays date, time, load and CO2 data of the current hour and current day, yesterday, last week and last month (will show 'COMMISSION' instead if meter needs to be commissioned)

- Used for prepayment customers - Switches the display to UTRN(vend) entry mode; serves as backspace key during UTRN(vend) entry; enables Emergency Credit when made available; initiates supply reconnection from ‘READY' state. (Activates vend mode/Used to start reconnection process.)
B - Activates auto scroll display from sleep mode; used to scroll back through a display sequence; initiates UTRN(vend) authentication process; mutes alarm; used to confirm supply reconnection from ‘READY’ state.

Activating 'Boost' functionality on Liberty 110/112 meters

If you’re economy 7 customer with a Secure Liberty 110/112 (5-port) meter  and you would like to activate the appliance that is connected to your fifth terminal during peak hours, you can do so using the smart meter keypad.

You can activate this either on the IHD or the meter up to 10 times a day and it will turn on anything attached to the 5th terminal for 1 hour, this will be charged at the peak unit rate.

To activate the boost function:

  • Via the meter, press '2' on the keypad and press the 'A' button to activate - you'll hear a click when the boost has been activated and your meter display will read 'BOOST ON'
  • Via the Pipit IHDpress 'Dual Fuel' and then tap on the 'Status' button at the bottom of the screen on the electric side of the display.

 

WAN and HAN:

  • An issue with WAN will affect the ability of the electricity meter (and gas meter, if present) to send us data
  • An issue with HAN will not affect the ability of the meter to send us electricity data, but will affect the gas meter and IHD


What is WAN (Wide Area Network)?

 

WAN allows an electricity smart meter to send/receive data (such as meter readings) securely through the S1 Communications Hub. It uses a roaming SIM that works on 2.5G to do this - the same kind of data network your mobile phone uses. If you have good 4G signal but no 2.5G in your area, the meter will have no WAN.

 

 

This LED light represents if there is a WAN connection. It will also indicate how strong this connection is by flashing between 1 - 5 times before pausing.

  • 5 flashes indicates the strongest WAN connection
  • 1 or 2 flashes indicates weak WAN connection
  • Solid light indicates there is no WAN


What is an S1 Communications Hub?


The communications hub attached to the smart electricity meter is effectively our smart kit's brain. It works a little bit like a mobile phone, using a sim card to allow data to be received and transferred from the smart meters to OVO.

The hub allows for information to be stored, such as your meter readings and energy consumption history. This information is then relayed to the correct meter and will also be reflected through your IHD.

There are two main communication channels used by the hub; WAN (Wide Area Network) and HAN (Home Area Network).

How does WAN work?


Using the sim card installed in the S1 Communications Hub, the member's electricity smart meter will search for the strongest mobile data network in the area. (We call this roaming as the meter is able to pick and choose it's network depending on strength, unlike most mobile phones.)

  • If the electricity smart meter is able to latch onto a network, WAN will be established. This will allow for data to be transferred to between the smart meter(s) and OVO.
  • If a connection is unable to be established, it will be known in the industry, as a 'no-WAN'.


What do we mean by 'no-WAN'?


If there's 'no WAN', your electricity smart meter can’t connect to a network. This means no data can be transferred between the smart meter(s) and OVO.

  • This will mean you will need to provide your meter readings manually. 
  • However, providing your IHD is within the HAN, the IHD will continue to display your consumption as normal.


What do we mean by intermittent WAN?


If the mobile phone network(s) in your area is weak, the WAN connection may drop in and out. This is known as 'intermittent WAN'. In such instances, you will need to wait for your electricity smart meter to establish a WAN connection again. We recommend providing manual meter readings in the meantime.

I think I have an issue with my WAN... What can I do?


If you believe you have an issue with your WAN, go through The S1 Smart Meter Health Check. From this we will be able to identify:

  • If you have WAN and how strong this signal is
  • If the meter has been commissioned and has the ability to communicate with us
  • If a master reset may be able to resolve the issue



What is the HAN (Home Area Network)?

 

The HAN is a secure network that works in the same way as other wireless systems in the home. It allows the smart electricity meter to communicate with the smart gas meter IHD and Smart Relay (remember: gas meters can’t send us readings on their own or send data to the IHD).

A smart electricity meter uses the HAN to collect the readings/data from the gas meter. It also uses HAN to send information to the IHD and to connect to the Smart Relay. HAN only works if the gas meter and/or IHD is within range.

 

 

The HAN light will be solid when the HAN is open - this will activated during install (when pairing the electricity meter to the gas meter and any devices) as well as when pairing an IHD or smart relay via SFE. Once this process has completed, the HAN light will turn off.


What do we mean by 'no-HAN'?


If there’s ‘no HAN’ - the gas smart meter and/or IHD, can’t communicate with the electricity smart meter. This affects:

  • Gas meter - If the smart gas meter has 'no-HAN', it can’t send the meter readings/data back to the electricity meter. In this instance, you would need to provide a manual meter reading.
  • IHD - If the IHD is out of range from the HAN, it can’t display any data from the smart meters.


​​​How do you identify if a device is connected to the HAN?


Gas meters

  • In the bottom right-hand corner of the gas smart meter screen, there is a HAN symbol. The symbol will be flashing or solid:
    • Flashing - This would suggest that the meter is not connected to HAN. In this case, please complete  The S1 Smart Meter Health Check.
    • Solid - This is confirmation that the gas meter has been secured to the HAN. However it does not necessarily indicate that we are able to communicate with the gas meter. 

IHDs

  • You will need to check the Wifi symbol on the IHD:
    • For Pipit IHDs, see the guide linked here
    • For Chameleon IHDs see the guide linked here

 

I think I have an issue with my HAN... What can I do?


If you believe you have an issue with your HAN, complete The S1 Smart Meter Health Check. From this we’ll be able to identify:

  • If the gas meter is connected to the HAN
  • If the issue is with a meter or a device (please see processes below...)
  • If the meter has been commissioned

 

The metrology light

 

This light can be found to the right of the keypad and will most likely be continuously flashing which indicates there’s power going through the meter. All electricity going through the meter is measured, which is represented by the flashing of the LED. The meter is measuring this in kilowatt hours (kWh) and 3,200 flashes equal 1 kWh.

 

 

 

What to check if you’re off-supply

 

If you’ve lost supply and it’s not a power cut (check this by dialing 105) it could indicate a fault with your meter or the DNO equipment before your meter.

 

If the metrology light is off it’s worth checking that your meter is in credit mode - press any key on the meter to wake up the screen. It should then auto-scroll through various screens. The first display shown will be the meter mode either ‘CREDIT’ or ‘PAYG’, if your meter is incorrectly showing PAYG contact our Support Team. If the meter is in CREDIT mode contact your DNO to check the supply to the meter.

 

 

What are the dimensions of the Secure S1 smart meters?


Dimensions below are shown in millimetres.

Electricity meter


The dimensions are: H 178mm X W 146mm X D 64mm.



Gas meter


The dimensions are: H 264mm X W 235mm X D 174mm.
 

 

That’s your guide to SMETS1 WAN and HAN - leave a comment if we’ve missed anything out!

 

OVO member but not got a smart meter yet? - Book today!

 

Interested but not yet an OVO member? - Check out our plans!

 


62 replies

Userlevel 6
Badge +1

Much awaited guide Tim - thank you!

A concise, easy to read and can help with some basic understanding of SMETS1.

As I am still waiting for my IHD, I can try to understand use/spend information using the buttons in the interim.

Userlevel 1

If the metrology light is flashing, what kind of fault is usually the cause? I have a liberty 110 meter and it appears that the economy 7 has not energised through the night. Also the boost function on key 2 doesn’t work, it’s just says “not used”. Is there a way around this?

Userlevel 7
Badge +4

Hi there @G_Etch ,

Could you fill out your profile for us please? It helps us to give you the right advice a bit faster.

 

It sounds to me as if your meter isn’t set up properly with the right tariff details. If you have a chat with the support team they should be able to fix this for you.

Userlevel 1

Hi there @G_Etch ,

Could you fill out your profile for us please? It helps us to give you the right advice a bit faster.

 

It sounds to me as if your meter isn’t set up properly with the right tariff details. If you have a chat with the support team they should be able to fix this for you.

 

I’m not a tenant of the affected property, I’ve been called out to no heating and it looks as if no economy 7 has kicked in at all. Regarding the metrology light, if operating correctly, what would a healthy signal be? Would it flash just not as fast or is it off completely?

Userlevel 7
Badge +4

Ahh ok, I get you now.

The metrology light won’t flash at all if there’s no activity. But it should flash if the meter is healthy and there’s energy being measured through it.

 

Could you snap a photo of the meter (if the tenant grants consent) for me please? It might help us to see what you’re seeing.

Userlevel 1

Ahh ok, I get you now.

The metrology light won’t flash at all if there’s no activity. But it should flash if the meter is healthy and there’s energy being measured through it.

 

Could you snap a photo of the meter (if the tenant grants consent) for me please? It might help us to see what you’re seeing.

 

Userlevel 7
Badge +4

Sorry @G_Etch ,

Your reply didn’t seem to save properly, did you get confused with the Quote button?

You should be able to reply directly with the Reply box below the most recent post. Could you try again for me please?

Userlevel 1

Ahh ok, I get you now.

The metrology light won’t flash at all if there’s no activity. But it should flash if the meter is healthy and there’s energy being measured through it.

 

Could you snap a photo of the meter (if the tenant grants consent) for me please? It might help us to see what you’re seeing.

 

 

Userlevel 7
Badge +4

Perfect, thanks @G_Etch !

Can you try pressing 6 on the meter and seeing if that shows anything interesting. If you get an IMP R01 and an IMP R02 reading, the meter should be running in Economy 7 mode. Let me also call in @Tim_OVO just in case.

Please let us know what happens

Userlevel 1

I have tried that and the meter has gave me a reading for both IMP R01 & IMP RO2. Not sure if that applies to the last couple of nights as the tenant has had no hot water or heating as they are both on the economy 7. I’ve tried to boost the economy 7 on using 2 on the keypad but to no avail.

Userlevel 7
Badge +4

Thanks, that helps a lot.

In that case, I’m starting to suspect that there might be a fault with the meter itself, which is not good. Sorry for the trouble this is causing!

I do have some good news however, it might be possible to get an OVO Engineer out today to take a closer look at the meter and give the tenant a shiny new one if the fault is confirmed. Would they be able to get in touch with OVO by phone or live chat? Live chat tends to be the faster one.

If you let the agent know you’ve spoken to me here on the forum and provide a link to this thread, they’ll be able to get up to speed quickly too. Please keep us posted with any updates.

Userlevel 1

I’ve contacted ovo regarding this problem but they’ve informed me that they don’t have it on their system because the tenant is not an ovo customer. I’ll have to contact the supplier to the property to see if there is anything they can do.

 

thanks for all your help, much appreciated.

Userlevel 7
Badge +4

No worries. Sorry I got mixed up about the supplier, muscle memory gets in the way there.

If you need any more advice about anything though, feel free to stop by again. These forums are open to everyone even if you’re not with OVO.

Userlevel 7

Could you come back here to let us know if it was anything to do with the meter, @G_Etch?

 

If electricity is flowing through the meter (indicated by that metrology light, nice one @Blastoise186), appliances not working are unlikely to be related to the meter. Check the consumer unit. 

 

Your supplier will be able to confirm if the meter is set up to record usage with an economy 7 off peak vs peak usage setting. But yeh this shouldn’t be effecting the supply or use of those appliances. Keen to hear what the issue was….

Userlevel 5
Badge

This may be a stupid question, but can the smart meter display the mains voltage? I have some overvoltage issues, and it would be nice to have a calibrated measurement. (And I know that this is an issue for the DNO, not for OVO.)

Userlevel 7
Badge +4

Heya @MrPuds .

As far as I’m aware, I’m not sure it can do that on the meter display itself, or at least not on any smart meters I know about. It’s possible that a SMETS Command might be able to pull that data though.

However, I think the electricity meters used in the UK would be designed for and calibrated to work with the expected 220-250 Volt range that’s mostly present on the National Grid over here. An electricity meter designed for the UK probably wouldn’t work properly in the USA for example, without being recalibrated or modified somehow.

Userlevel 7

As far as I’m aware, I’m not sure it can do that on the meter display itself, or at least not on any smart meters I know about. It’s possible that a SMETS Command might be able to pull that data though.

However, I think the electricity meters used in the UK would be designed for and calibrated to work with the expected 220-250 Volt range that’s mostly present on the National Grid over here. An electricity meter designed for the UK probably wouldn’t work properly in the USA for example, without being recalibrated or modified somehow.

 

Does that sound right, @MrPuds @Transparent? Sorry I can't offer advice on this but Blaster usually knows his smart meters. 

Userlevel 7
Badge +4

I did actually map out the entire button and menu structure of my Aclara SGM1311 a few months ago and shared it with Tim. I would try to dig it back out if I could, but with over 20 pages of PM thread, it’s a bit tricky.

I might have saved the details elsewhere on the forum though. But I don’t think I did. And as far as I’m aware, electricity meters are only usually capable of monitoring how much juice flows through the meter at the point of measurement, not what voltages are going through. But yeah, I definitely wouldn’t recommend trying to get a USA meter designed for 110V to measure a 240V supply unless you wanted the dials to spin at least twice as fast!

Mind you, it’d probably blow the meter way before then…

On the plus side, at least modern smart meters are more resistant to tampering by magnets than the old mechanical ones were. If you put any magnets too close to a smart meter, it’s quite likely it will react though - and you’ll probably trigger a tamper alarm.

So if you do have any giant neodymium magnets in the house, you might want to move them a bit further away from your smart meters. Just in case! :blush:

Userlevel 7
Badge +5

No, voltage isn’t recorded by Smart Meters.

Perhaps it should’ve been in the specification. The power is recorded, and is then used by DNOs to assess the loading factors on their transformers.

If, @MrPuds you have reason to believe that your voltage is higher than the maximum permitted threshold of 253v, then you should inform your DNO. They may be unaware of affects from a recent network change in your locality.

There was a power-outage on an underground cable close to me on 4th March. Since the repairs, the voltage at my house has dropped by about 8v. For me this was good news because it’s been rare than I’d previously witnessed less than 248v during daytimes.

 

Hi, I had a high reading on my Secure 100 so the Landlord sent a video of the reading, however I'm not sure which is the correct reading.

He presses 9 and IMP KWH comes up followed by a high reading, then EXP KWH followed by 000's and then IMP KVARH followed by another set of numbers.

Which is the correct figure to use please? Just to note that nothing has changed in the flat (high electric consumption) so there is no reason the Reading should have jumped up so much.

Thanks,

Keith

Userlevel 7
Badge +4

Hey there @Keth !

Good question! Exactly which one you’re after depends on what you’re trying to get out of the meter. If you’re simply looking for the regular meter reading as to how much you’ve used, it’ll be the IMP KWH one - this is for how many Kilowatt Hours you’ve pulled from the National Grid. EXP KWH is for how many KWH you’ve pumped out to the National Grid, which is only relevant if you’ve got solar panels for example.

IMP KVARH can be ignored completely, since it’s not used to calculate bills or anything interesting. The Secure Liberty 100 Series meters can be a bit fiddly to get readings out of sometimes, but they’re not too bad once you know what you’re after.

Unusual for a high reading though. You might want to chat with the Support Team about that.

Thanks for your answer, it’s not the one I was after mind, but thanks for your time!

Keith

Userlevel 7
Badge +4

No worries @Keth , glad I could help .

As the Secure Liberty 100 Series meters are all smart meters, they should be sending readings in automatically and the readings should show up in your account shortly after midnight each day (for Half-Hourly and Daily mode), or on the date the billing cycle resets (for Monthly mode).

If OVO’s system detects an anomaly as a result of unusual readings that are way out of expected ranges, someone will look into it to try and figure out what’s going on. I do have some thoughts of my own here as well, so I’ll send you a PM shortly. 

Userlevel 7

Thanks for your answer, it’s not the one I was after mind, but thanks for your time!

Keith

 

Not sure I understand, @Keth - @Blastoise186 has just explained how you can confirm the correct reading showing in that video from the landlord. Is it not the right answer as it confirms a higher reading? 

 

 

Hi Tim, 

I was merely saying it wasn’t the “right” answer because it means I’ll have a bigger bill to pay!

 

Thanks

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