Which item is checked as part of the PDI process for the new fire extinguisher?

During the Pre-Delivery Inspection (PDI) process for a new fire extinguisher, a key item that is checked is the pressure gauge to ensure it is within the serviceable band. This is crucial because the pressure gauge indicates whether the extinguisher is adequately charged and ready for use in an emergency. If the gauge shows that the pressure is too low or exceeds the recommended range, the extinguisher may not function properly, putting safety at risk.

The other items listed, while relevant to overall safety and operational readiness, do not pertain specifically to the PDI process for a new fire extinguisher. For instance, operational time is not typically a measure for assessing the condition of a newly delivered extinguisher. Sensor calibration applies more to devices where sensor accuracy is critical, and while having a safety instructions manual is important for proper operation and understanding, it is not part of the technical checks performed during the PDI for the extinguisher itself. Thus, focusing on the pressure gauge ensures that the extinguisher meets operational standards before being deployed.