Perform the temperature cycling in accordance with IEC 60068-2-14, Test Na.Raise the temperature from Tmin to Tmax within 30 s or less. Keep the DUT at Tmin or Tmax for a given soaktime after thermal stability is obtained. The soak time can be agreed between customer and supplier, or theexposure time can be chosen among the values 20 min, 40 min, 60 min or 90 min, depending on its size andother properties of the DUT. Use operating mode 1.1, as defined in ISO 16750-1. See Table 4 for the numberof cycles.Upon agreement, this test may be performed during the development of a DUT with opened housing orwithout housing.