Temperature Control of a Reactor

Question

An operator was told to control the temperature of the reactor at 60°C. The operator set the set point of the temperature controller at 60. The scale actually indicated 0-100% of the temperature range of 0-200°C. This caused a runaway reaction which over pressurized the vessel. Liquid was discharged and the injured the operator. What was the actual set point the operator set?

Summary

The question belongs to Mechanical Engineering and it is about temperature control in a reactor. The difference in the setting points and the resultant temperature change in the reactor was misinterpreted by the operator resulting in his injury.