Calorific Value. (1) The calorific value of the gas offtaken at the Premises Supply Meter Point and any Fuel Gas offtaken and any Auxiliary Gas offtaken shall be determined by the Process Gas Chromatograph, specified in Annex B. Installed to BS ISO 15971 and National Grid Gas’s T/SP/ME/1, with Calorific Value determined to ISO 6976 and shall have a sample system compliant with ISO 10715. (2) The Operator shall give National Grid Gas and the Relevant Shipper reasonable advance notice of the final commissioning of the Process Gas Chromatograph which should include a Performance Evaluation to ISO 10723 carried on the Gas Chromatograph at its final installed location to demonstrate that the instrument is within the required bias and uncertainty [0.14MJ] for the determination of the calorific value. (3) The Operator shall operate and maintain the Process Gas Chromatograph to National Grid Gas’s T/PM/GQ/3 and T/SP/ME/1 and to BS 15971 and shall, following replacement and or repair of certain key components, as agreed between the parties, carry out a performance evaluation to ISO 10723, at the installed location, to demonstrate that the instrument is within the required bias and uncertainty [0.14MJ] for the determination o the calorific value.]
Appears in 4 contracts
Samples: Network Exit Agreement, Network Exit Agreement, Network Exit Agreement
