Instrumental safeguards in the process industry require periodic maintenance and testing. Consiltant BV has developed a handy and free tool for the maintenance engineer.
All SIL safeguards must be entered in the SIS Maintenance System. The status of all the safeguards is then made visible at a glance; when these should be tested, whether bypasses are active, whetn sensors should have been calibrated and whether parts should be replaced.
More information can be found at: SIS maintenance system