Final answer:
The question asks about the certification frequency of PECs and SECs by a qualified technician, but the necessary information for a direct answer is not provided. The frequency can depend on specific industry regulations or company policies and might range from annually to biennially, among others.
Step-by-step explanation:
The question pertains to the periodic certification of PECs (Portable Electronic Containment systems) and SECs (Secondary Electronic Containment systems), which must be certified by a qualified certification technician. Unfortunately, the frequency of this certification is not provided in the question text. Typically, standards for certification frequencies are set by industry regulations or company policies and may vary depending on the equipment type and usage. It's important to consult the relevant regulation guidelines or corporate policies to determine the accurate timeframe for these certifications. In some cases, this might be annually, biennially, or on a different specified schedule.