Target Lag Times The target delay times are default -industry standards", but may be inappropriate for a particular application, some processes, like ethylene oxide, require a much faster response and some, like a pipestill, tolerate a slower response The acceptable response time must be specified by the process control engineer. Sample Transport Lines Checking for Delay There are two primary types of transport line, with many variations: Single line system (does not return main flow back to process) Fast loop system (returns main flow back to process) Transport time sample conditioning del analysis time total delay Delay must be short enough to keep the measurements useful. If no other time is stated, We assume: Target transport lag: Typically 60 seconds (from process tap to analyzer location) Target conditioning lag: Typically 30 seconds (through conditioning system)