This standard is applicable for proportional-integral-derivative (PID) pneumatic and electric industrial process controllers using analogue continuous input and output signals which are in accordance with current international standards. It should be noted that while the tests given herein cover controllers having such signals, they can be applied in principle to controllers having different but continuous signals. It should also be noted that this standard has been written for pneumatic and electric industrial-process controllers with only analogue components and is not necessarily to be used for controllers with microprocessors. This standard is intended to specify uniform test methods for evaluating the performance of industrial-process PID controllers with analogue input and output signals. The test conditions specified in this standard, for example, the range of ambient temperatures, power supply, etcetera, shall be used when no other values are agreed upon by the manufacturer and the user. When a full evaluation in accordance with this standard is not required, those tests which are required shall be performed and the results reported in accordance with those parts of the standard which are relevant. The testing program should be subject to an agreement between manufacturer and user, depending on the nature and the extent of the equipment under consideration.