Help with your SMETS1 Smart Meter

A useful guide on everything you need to know about your Secure Liberty 100/110 Smart Meter

What are Smart Meters?

Smart meters are a next generation meter for both gas and electricity. They are a replacement for standard meters, which require you to track your own meter readings and submit them to your supplier to ensure accurate bills.

For prepayment customers, there are additional top up options for automatically adding credit to your meter.

Smart meters may also come with an in-home display. This gives you up to date information about your consumption and the cost of your usage.

They can be really helpful for cutting bills and your carbon footprint.

SMETS1 is the first generation of smart meters. Installations for these began in 2013.

What do the buttons on the meter do?

Your smart meter will have a keypad, which you can use to check your meter readings, balance, and enter vend codes should you need to.

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)

elec meter

A – this button can:

  • Switch the display to vend mode (the mode that allows you to enter your vend code and top up your meter)
  • Use it to ‘backspace’ when you are entering the vend code if needed
  • Enables emergency credit when its made available
  • Starts the reconnection process when needed

B – this button can:

  • Deactivate sleep mode
  • Use it to scroll back through a display sequence
  • Should be pressed after entering the vend code to complete the top up your meter process
  • Mutes alarms
  • Confirms that your supply is reconnected


Below are some key buttons that can allow you to perform important functions:

7+A - Activates Emergency Credit

AAB - Turns meter on whilst Armed

A >"Vend Code" >B - How to enter a Vend Code for a manual top up

9 - View Meter Reading IMP KWh for electricity, m³ for gas

What is a vend code?

If you top up your meter at a store, there will be a code on the receipt. This is often called a vend code, a transaction code or a UTRN code. Your meter will ask you for your vend code. See instructions of how to input this code and top up your credit below.

What is vend mode?

Vend mode is when your meter is ready to receive the vend code. Make sure when you input your code, the meter is in vend mode.

You must also remember to exit vend mode (by pressing ‘B’) once you have entered the code. If you do not exit vend mode, it could delay your credit hitting the meter.

vend mode

Manually entering a vend code

You may need to enter a vend code if your meter has no WAN, or a top up fails to hit your meter. WAN is the network that allows your smart meter to connect to energy supply services.

To enter a vend code, you will need to

  1. press B to wake up the meter from sleep mode.
  2. press A and enter the vend code/ UTRN code as displayed on your receipt/device. If you make a mistake whist entering the code, press A to delete the last digit entered.
  3. Press B once the vend code has been entered.

If the vend code has been entered correctly, the meter will say ‘Accepted’ and credit your meter.

If the meter says ‘Incomplete’ the vend code has not been entered in its entirety. Press A on the meter and retype the vend code.

If the meter says ‘Rejected’, this means the vend code was not recognised. Try again in case of a mistake, and if this is still not working, contact our customer service team on 0330 0414 902.

If you think something isn't working right with your meter, click here to check whether your meters are connected to the network.

More questions?

If you want to find out more about smart meters and what they can do, take a look at our top smart meter queries.