800-801 / 1143
DEVICE RESPONSE TIME - Accuracy
• Critical factor in achieving SIFRT
• Impacts the design margin between PST and SIFRT
• If accuracy of devices is low, then a greater design
margin should be used
• Periodic calibration to maintain accuracy
Slide 14
Challenges in Achieving Safety Instrumented Function Response Time for a Fast-Acting Process• K. Rampaul, A.
Barnwell & S. Sookhoo