Product details：

Origin: United States
Key words: T8850
Net weight (Kg) : 1.221Kg
Condition: 100% original
Warranty: 1 year
Packaging: 100% original
Delivery time: TNT, DHL, FEDEX, EMS, UPS
Time of payment: Telegraphic transfer
Delivery time: 3-5 days

T8850

In most system configurations there will be some elements that are not tested by the system’s internal diagnostics. These may be the final passive elements in some I/O module types, the FTA’s which provide the interface with the sensors, the actuators themselves, and the field wiring. A regime of Planned Maintenance testing shall be adopted to ensure that faults do not accumulate within those elements that could ultimately lead to the system’s inability to perform its required safety functions. The maximum interval between these tests shall be defined during the system design, i.e. before installation. It is highly recommended that the test interval be less than 12 months.
During the lifetime of the system, it will be necessary to undertake a number of field maintenance activities that will include re-calibration, testing, and replacement of devices. Facilities should be included within the system design to allow these maintenance activities to be undertaken. Similarly, the operating and maintenance plan needs to include these maintenance activities, and their effect on the system operation and design. In general, adequate provision for these measures will be defined by the client and provided the facilities, i.e. maintenance overrides, are implemented within the requirements specified within this document. No further safety requirements will be required.