1. PN UNC AMR Topic Workgroup
Meter Reading Validation Information/Analysis Request

2. Background
For future AMR sites which provide daily reads or a periodic read to the Transporters, the workgroup is considering standard validation rules carried out by the Shipper prior to submission.
The checks include;
Completeness check to ensure all readings expected are received (including converter readings)
Tolerance check to ensure the consumption derived from the reading is within a specified tolerance for the AQ/SOQ band
At the AMR 19 meeting it was suggested that analysis is performed by Shippers to test the tolerances on real life examples

3. Analysis
Analysis required to support a suitable set of standard industry checks & tolerances on gas meter readings
Shippers to test the ‘strawman’ tolerances to check if they are appropriate, and suggest alternatives if not
The checks are the minimum required before submission to the Transporters
Two sets of tolerances;
Table 1: on receipt of daily reads
Table 2: on receipt of periodic reads
Tolerances are applied to the consumption derived from the meter reading
Where the read fails the tolerance it is subject to further investigation

4. Table 1 - Tolerances for Daily Reads
Lower AQ Band (kWh)
Upper AQ Band (kWh)
Tolerance
(consumption at Meter Point level)
73,199
Greater than 73,199 kWh
73,200
731,999
+ or – 100% of AQ
732,000
5,859,999
5,860,000
29,299,999
+ or – 100% of SOQ
29,300,000
57,599,999

5. Table 2 - Tolerances for Periodic Reads
Lower AQ Band (kWh)
Upper AQ Band (kWh)
Tolerance
(Consumption at Meter Point level)
73,199
+ or – 300% of AQ/365 x no. of days
73,200
731,999
+ or – 250% of AQ/365 x no. of days
732,000
5,859,999
+ or – 200% of AQ/365 x no. of days
5,860,000
29,299,999
+ or – 150% of SOQ x no. of days
29,300,000
57,599,999
+ or – 100% of SOQ x no. of days

6. Next Steps
The next meeting of the Project Nexus AMR Workgroup will take place on May 4th, 2011
Shippers to provide alternative tolerances if the ‘strawman’ values are not workable
We would like to conclude discussions on read validation at the meeting
For more information please contact: or