16. An ATC designed for a meter that measures liquids at an ambient temperature shall correct the measurement results within the applicable limits of error set out in section 270 of the Regulations over at least the range of liquid temperature of -30°C to +40°C or, if the name-plate of the ATC indicates a wider temperature range, over at least that wider temperature range.

17. An ATC designed for a meter that measures liquids at temperatures different from the ambient temperature shall correct the measurement results within the applicable limits of error set out in section 270 of the Regulations over the temperature range marked on the name-plate of the ATC, which range shall cover at least 50 degrees Celsius.

18. When the temperature of a liquid is outside the temperature range of an ATC, the ATC shall be designed

• (a) to automatically prevent further deliveries; or

• (b) to remain operative where the VCF does not exceed the value corresponding to the temperature of the liquid.

• 19. (1) Where the section of pipe, or other component, containing test liquid and the temperature sensor in a metering assembly incorporating an ATC have first been stabilized at ambient temperature and where test liquid at a temperature approximately 20°C higher or lower than ambient temperature is suddenly caused to flow through the pipe section at a mean velocity of approximately 3 m/s, the temperature sensor shall respond to at least 90 per cent of the variation in the temperature of the liquid

  • (a) within 15 seconds, in the case of motor fuel dispensers; and

  • (b) within 20 seconds, in the case of any other type of meter.

• (2) For the purposes of subsection (1), the test liquid shall be mineral spirits or any other liquid with similar physical properties.

20. A meter equipped with an ATC shall, when inspected using the gross mode of registration, meet the performance specifications applicable to volumetric liquid meters.

21. An ATC shall remain within the applicable limits of error set out in section 270 of the Regulations when the ATC and the sensor are tested under the conditions set out in sections 29 to 31 of the Electronic Registers and Ancillary Equipment Incorporated in Metering Assemblies Specifications.

22. For the purposes of subsection 270(7) of the Regulations, the test volume for an ATC shall be an amount equivalent to a normal delivery through the meter, but at no time shall the test volume be less than 2,000 times the value of the minimum increment of registration of the meter register as set out in section 20 of the Electronic Registers and Ancillary Equipment Incorporated in Metering Assemblies Specifications.

23. A temperature sensor that is used with an ATC shall be located no more than 1 m from the meter, as measured along the piping of the meter, and shall be installed so that

• (a) the sensing end of the sensor is near the axis of the pipe carrying the liquid; and

• (b) no valves, pumps or other equipment that may alter the temperature of the liquid are located between the sensor and the meter.