Test report CVN Project number Page 2 of 2

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2 Project number Page 2 of 2 Tests : Results : The diaphragm gas meters as specified in annex 2 were tested for compliance with the European Standard BS EN 1359 : 1999 "Gas meters - Diaphragm gas meters", the EEC regulations on gas meters. The performed tests are stated in annex 1 of this test report. If applicable specific test conditions are stated at each test. See annex 1 of this test report. For all performed tests the gas meter fulfils the requirements of the European Standard BS EN 1359 (1999). The investigation has resulted in an EEC type approval no. E276 rev. 01. Uncertainty : The reported uncertainty of measurement is based on the standard uncertainty multiplied by a coverage factor k=2, which for a normal distribution corresponds to a coverage probability of approximately 95%. The total uncertainty of the measurements of the error of indication is 0,3% for flow rates greater than 400 dm³/h and 0,6% for flow rates smaller than or equal to 400 dm³/h. Annexes : The complete test report consists of the following annexes: annex 1 annex 2 annex 3 : performed tests : characteristics of the tested meters : test data Remark : The test data as presented in the annex 4 of this test report is performed under RvA accreditation with reference number L029, in which conformity to ISO/IEC has been demonstrated. The data as presented in the annexes 1, 2 and 3 gives extra information and is not included in the scope of this accreditation.

3 Test report no. CVN Annex 1 Page 1 of 2 Performed tests The diaphragm gas meter, type GNM, manufactured by LLC AEM, was tested for compliance with: - the European Standard BS EN 1359 : 1999 "Gas meters - Diaphragm gas meters". - the EEC regulations on gas meters; Particular requirements of the EN1359 article 5.1 or B tests: passed not not annex 4 applicable performed page Error of indication Pressure absorption Starting flow rate 5.4 Metrological stability External leak tightness Resistance to internal pressure Metercase sealing Connections Resistance to vibration Resistance to impact Resistance to mishandeling 6.4 Resistance to storage temperature range Pressure measuring point Insulating feet Magnetic index drive Reverse flow devices Resistance to high ambient temperature or B.2.2 Durability Meter error of indication at declared ambient and gas temperature limits 7.2 Index Toluene/iso-octane vapour test Water vapour test Ageing test 8.3 Durability and legibility of marking Ultraviolet exposure test

4 Test report no. CVN Annex 1 Page 2 of 2 Performed tests Particular requirements of EEC regulations on gasmeters. article EEC regulations 44, 45, 50 3 / appendix, II, 6 *) 3 / appendix, II, 4.3 *) 52, 55 tests: passed not not annex 3 applicable performed page accuracy tests under reference conditions 1 pressure absorption 2 repeatability test 30 x 0,1 Qmax endurance test Remark: The measurements are performed at a reference temperature of +20 C, unless an other temperature is stated. *) See chapter II of the appendix of the EEC regulations on gas meters.

5 Test report no. CVN Annex 2 Page 1 of 1 Annex 2: Characteristics of the tested meters The tested diaphragm gas meters have the following characteristics: Diaphragm gas meter: - Manufacturer: LLC AEM - Model: GNM - Q min [m 3 /h]: 0,04 - Q max [m 3 /h]: 6 - V [dm 3 ]: 1,2 - p max [bar]: 0,5 - Upper ambient temperature [ C]: Lower ambient temperature [ C]: 50 - Connections: ISO Markings on the individual meters: Sample Model Serial Year of number number manufacture 1 GNM G GNM G GNM G GNM G Remark: The results as mentioned in this test report relate only to the meters which are tested.

6 Annex 3 Page 1 of 4 Test: Errors of indication The errors of indication of the diaphragm gas meters are measured under reference conditions at several flow rates, by performing 6 accuracy curves in an increasing and decreasing manner. Before performing the accuracy tests the meters have been running in at a flow rate of 6 m³/h and passing a volume of 18 m³. Results: Running in: 18 m 3 at 6 m 3 /h Sample 3 Flow Test Errors [%] maximum rate volume differrence [m 3 /h] [dm 3 ] [%] Q max > ,2 + 0,4 + 0,5 + 0,4 + 0,3 + 0,3 0,3 0,7 Q max > ,0 + 1,1 + 1,0 + 1,2 + 1,2 + 1,3 0,3 0,4 Q max > ,1 + 1,1 + 1,2 + 1,3 + 1,2 + 1,4 0,3 0,2 Q max > ,2 + 1,3 + 1,4 + 1,5 + 1,4 + 1,5 0,4 0,1 Q max > ,3 + 1,2 + 1,2 + 1,4 + 1,2 + 1,2 0,3 3 Q min > ,6 + 0,9 + 0,5 + 0,8 + 0,9 + 0,9 Q min > 50 0,0 + 0,1 0,2 0,2 0,2 0,6 Sample 4 Flow Test Errors [%] maximum rate volume differrence [m 3 /h] [dm 3 ] [%] Q max > 500 1,4 1,1 0,8 1,2 1,2 1,3 0,6 0,7 Q max > 500 0,2 0,0 + 0,2 0,4 0,1 0,3 0,5 0,4 Q max > 500 0,1 0,1 + 0,3 + 0,2 + 0,1 + 0,0 0,4 0,2 Q max > ,6 + 1,0 + 1,0 + 1,0 + 0,8 + 1,1 0,4 0,1 Q max > ,2 + 1,5 + 1,4 + 1,5 + 1,2 + 1,2 0,3 3 Q min > ,4 + 1,6 + 1,6 + 1,4 + 1,4 + 1,7 Q min > ,5 + 1,7 + 1,2 + 0,8 + 1,0 + 0,9 Flow Mean error for mpe result each meter [%] rate Sample no. [m 3 /h] 3 4 [%] +/- Q max + 0,3 1,1 ± 1,5 + 0,7 Q max + 1,1 0,1 ± 1,5 + 0,4 Q max + 1,2 + 0,1 ± 1,5 + 0,2 Q max + 1,4 + 0,9 ± 1,5 + 0,1 Q max + 1,2 + 1,3 ± 1,5 + 3 Q min + 0,8 + 1,5 ± 3,0 + Q min 0,2 + 1,2 ± 3,0 +

7 Annex 3 Page 2 of 4 Test: Pressure absorption The pressure absorption of the meters is determined at Q max and at Q min. Results: Pressure absorption: Average value at Q max : 180 Pa Average value at Q min : 20 Pa

8 Annex 3 Page 3 of 4 Test: Resistance to high ambient temperatures The meter under test is installed inside a furnace with its connenctions positioned identical as used in practice. The meter is pressurized with nitrogen at a pressure of 100 mbar and maintained constant during the whole test. The test is performed with special prepared sample *). Before performing the high temperatures test the meter under test is checked on leak tighness and was found leak tight. Next the furnace is set to a temperature of 650 ºC, the rise curve of the increasing temperature is according to ISO 834. Results: After regarding a period of 30 minutes at 650 C the leakage rate is registered. The registered leakage rate did not exceed 150 dm³/h. *) Manufacturer has prepared a special sample meter for performing the high temperature test. In this prepared meter the internal metering part was replaced with a metal weight piece equivalent to the mass of the metering apparatus.

9 Annex 3 Page 4 of 4 Test: Meter error of indication at declared ambient and gas temperature limits The constant temperature test is performed with 2 meters at +20, +50 and at -20 C. For each meter the measured errors are stated at mentioned temperatures. Sample 3 Flow Test Measured errors [%] rate volume Error at Error at Error at [m 3 /h] [dm 3 ] -20 C +20 C +50 C Q max > ,2 0,2 + 2,2 0,4 Q max > 200 0,2 + 0,3 + 1,5 0,1 Q max > 100 1,4 0,1 + 1,6 Sample 4 Flow Test Measured errors [%] rate volume Error at Error at Error at [m 3 /h] [dm 3 ] -20 C +20 C +50 C Q max > ,4 + 0,6 + 0,3 0,4 Q max > ,6 + 0,5 + 1,0 0,1 Q max > 100 0,3 1,2 + 2,4 Remark: This test is performed on completion of the endurance test