Temperature Range (See 2 above), t = time in minutes required for the
electronic part with the largest thermal mass (excluding magnetics and
connectors) or nonmetallic portion of the PWB surface to traverse T and reach
thermal stability (See Figure 2-l). The temperature rate of change,
for calculation purposes, can be taken from the increasing or
decreasing portion of the cycle. The thermocouple used to verify the
response shall be insulated from the chamber air.