ANSI B109.2:2000 pdf free.DIAPH RAGM-TYPE GAS DISPLACEMENT METERS.
Samples as in 2.9.1 shall be mounted in the salt spray chamber in their normal operating position. They shall be subjected to a 1000-hour salt spray test in accordance with the ASTM Method B117-1973,“Salt Spray (Fog) Testing.” As a result of this test, there shall be no appreciable signs of blistering, corrosion or deterioration of the surface. The samples shall then be placed, without cleaning or washing, in a dry indoor location for a period of six months, after which time there shall be no appreciable signs of progressive corrosion or electrolytic action. 2.9.3 Chemical Resistance Test (for meter index window). The meter index window shall demonstrate resistance to chemicals recommended by the manufacturers and used in cleaning meters. Method ofTest The window shall be immersed in the cleaning agent for 30 minutes, without showing any discoloration or harmful effects. 2.10 METER INDEX WINDOW IMPACT RESISTANCE The index window shall be made of a material having a minimum lzod impact resistance of 0.3 f.Jbfin. at 73F (16 J.m’ at 23°C). (Reference the“Standard Method of Test for Impact Resistance of Plastics and Electrical Insulating Materials,” ANSI/ASTM D256.) 2.11 METER INDEX WINDOW CLEARNESS TEST Under normal insallation conditions, there shall be no appreciable distortion or loss of clarity of the index markings caused by the window material. 2.12 TEMPERATURE AND THERMAL SHOCK RESISTANCE A meter shall be capable of operating within ambient temperature and flowing gas temperature limits of -30°F and 120F (-34.4°C and 49°C) and, following conduct of the test specified in 2.12.2, the meters shall comply with the accuracy specifications in 3.3.1 and 3.3.2. and the pressure test requirements specified in 3.5. 2.12.1 Temperature Resistance. The meter case only shall not be structurally impaired by an exposure to 360F (182°C) for a period of 1 hour.With the meter subjected to an intermnal pressure of 1.5 times the MAOP or 10 psig (69 kPa) gauge, whichever is greater, the inlet and outlet connections shall be individually subjected to the bending moment and the torsion shown in Table III for a period of 1 minute. There shall be no leakage, and meter accuracy shall not be adversely affected by these tests (see 3.3.1 and 3.3.2).ANSI B109.2 pdf download.