text: Increasing Diagnostic Coverage in Safety Instrumented Functions - Emerson Automation Experts Emerson Automation Experts
  Posted Friday, August 8th, 2008 under Abnormal Situation Prevention, Final Control Element, Safety.
  albustanji says:
  What about, semi-automatic diagnostic mode for your instruments.
  What is the order of diagnostic if it is exist?
  M. Albustanji
  Short response will be depending upon application, process parameters, type of fluid and physical properties of fluid, type of valves, size etc., diagnostics coverage factor for semi automatic Partial stroke test diagnostic coverage factor may vary. Based on past industrial applications experience, it should not exceed more that 70% for FAIL CLOSE valve.
  More detailed response can be provided by our area technical representative. If the end user can provide company name and his / her phone number then a contact can be made by our local office to get into more details.