The “AUTOCAL” calorimeter, which we introduced in 1984, offered a higher level of automation than any competing system available at that time.
- A built in bayonet locking bomb completely eliminated the need for any bomb handling by the operator.
- An automatic loading system placed the bombcap into the bomb and locked the cap.
- A novel semi-permanent firing wire was used which lasted for fifty or more determinations, and required only that a short length of cotton be looped between the firing wire and the sample. Prior to this most calorimeters needed a new firing wire for each determination, some even needing a new wire and cotton per firing.
- The automatic cycle included charging the bomb with oxygen, stabilising temperature equilibrium between the bomb and the outer jacket using a novel patented through flow method, firing the bomb, determining temperature rise and Calorific Value, then finally cooling and depressurising and rinsing the bomb.
- Despite the numerous advantages the AUTOCAL provided, it became clear as time went by that a top loading bomb offered better seal security. Hence all later calorimeters from Energy Instrumentation were top loaded.