What is meant by diagnostic coverage?

An important parameter in the use of pressure sensors in safety devices is the so-called “Diagnostic Coverage” (DC). However, since single-channel, in particular, but also two-channel safety circuits often malfunction or may be defective, a known diagnostic coverage helps interpret such structures properly.
Here, Excitement for the diagnostic coverage can only be determined by testing a larger number of instruments in standardised procedures. With the fault detection, two failure types are primarily distinguished:
Detected dangerous failure: Failures which could lead to a loss of the safety function -> only faults which are detected.
Dangerous failure: All failures that could potentially lead to a loss of the safety function -> detected and undetected failures.
Dangerous failure
A dangerous failure is a failure that, first and foremost, represents a risk to humans, but may also cause damage to the machinery or to the products.
Calculation of the diagnostic coverage – classification dignostic coverage
λdd: Number of detected dangerous failures λdu: Number of undetected dangerous failures
Classification dignostic coverage
The diagnostic coverage must be determined for the entire safety circuit (sensor + controller + actuator) and also defines the maximum achievable level of SIL or PL. Therefore, in the selection of pressure sensors, it is recommended to favour those with higher levels of diagnostic coverage over those with lower levels of diagnostic coverage. Poison offers comprehensive solutions for the use of pressure sensors in a wide range of applications.
Contact us and we are happy to provide you with advice.

2 thoughts on “What is meant by diagnostic coverage?”

  1. Suivre le téléphone portable – Application de suivi cachée qui enregistre l’emplacement, les SMS, l’audio des appels, WhatsApp, Facebook, photo, caméra, activité Internet. Idéal pour le contrôle parental et la surveillance des employés. Suivre le Téléphone Gratuitement – Logiciel de Surveillance en Ligne. https://www.xtmove.com/fr/

  2. urveillez votre téléphone de n’importe où et voyez ce qui se passe sur le téléphone cible. Vous serez en mesure de surveiller et de stocker des journaux d’appels, des messages, des activités sociales, des images, des vidéos, WhatsApp et plus. Surveillance en temps réel des téléphones, aucune connaissance technique n’est requise, aucune racine n’est requise.

Leave a Comment