Division 2 In the case of a batch pressure system:

1. (a)

   the temperature must be monitored with a permanent thermocouple and it must be plotted against real time;

2. (b)

   the pressure stage must be monitored with a permanent pressure gauge; pressure must be plotted against real time;

3. (c)

   the processing time must be shown by time/temperature and time/pressure diagrams.

At least once a year the thermocouple and the pressure gauge must be calibrated.