This should be asked for.
It is always better to update the meters in storage since this will not require customer input later, but both are possible.
The original purchased tokens cannot be re-used since the meter will either see the token as OLD (if the TID in the token is older than the oldest TID in the meter memory), or the token will be seen as USED (if the TID value is in the TID memory of the meter). There is NO danger of token re-use.
I have tested 19 meters from 10 different companies and several manufacture dates.
The amount in the meter will not be erased and will be carried over Only the meter key will be changed, and the TID memory reset to all zeros.
The TID memory will be cleared.
The meter key will change.
The SGC value that can be read from the meter will also be reset to 0 for meters that only accept 2 key change tokens.
The KRN will change to 2.
The current credit value and other operational data will not be affected.
Yes, it will be possible, but the meter will stop dispensing electricity, water or gas once its credit runs out. There is no way to do the TID rollover without updating the security module and the vending system.
There is already a document (STS1800-3) that describes the process.
There are also specifications (STS600-8-6) that describe the new communications protocol to the security module.
These records need to be kept in the database of the vending system once the TID rollover project starts.
Only meters that have been manufactured with a base date of 2014 need not be rolled over.
Their certificate will state the date of certification.
Key change tokens can be entered in any order, however, if the customer is supplied with the key change tokens as well as a credit token on the new base date, then the credit token must be entered after the key change tokens. If he tries to enter the credit token first, it will be rejected – then he simply enters the key change tokens, and then the credit token.
No cost – just send the sample meter to the STSA – it must be coded to a default code since the STSA does not have access to the live vending key.
For TID rollover testing, approximately one week, depending on workload.
Yes, they will be able to be changed.
The change can be done by the customer or the utility.
No – all meters MUST accept the TID rollover key change if they are compliant.
Meters purchased prior to 2014 were not subject to the compliance tests as specified in the STS531-xx documents, which were only published in 2014. These documents contain tests to check for compliance to the TID rollover functionality as specified in IEC2055-41. It must be noted however, that all meters, since the initial publication of the IEC62055-41 specification in 2007, must comply with the TID rollover functionality.
All meters tested after 2014. Edition 3 of the IEC620055-41 was published in 2018, along with a letter explaining STS Edition 2. A one-year grace period is given for all meters and vending systems to comply with the new edition. Therefore, any meters or vending systems tested from May 2019 and later must comply with STS Edition2. However, during the 1-year grace period, some meters may have already been tested to STS Edition2. The certificate for the meter should be checked to see which edition it was tested to.