Table 8-2: Data Output For The Different Failure Categories - Dräger GasSecure GS01 Safety Manual

For the theoretical possibility that methane (propane) is mixed with other gases
that mask the change in ambient air composition, up to 60 seconds must be
added to the worst case response time stated in Table 8-1.
Table 8-1 and Table 8-2 list the SIL parameters for this field device and the data
output for the different failure categories, respectively.

Table 8-2: Data output for the different failure categories

Failure category
Fail safe detected (SD)
Fail safe undetected (SU)
Fail dangerous detected (DD)
Fail dangerous undetected (DU)
Note: When the fail safe values are output the safety function of the GS01 is no
longer valid and the safety instrumented system (SIS) needs to take appropriate
action such as a controlled shut-down.
16
Data output
Fail safe values (cf. Table 8-1)
Process value = 0 - 100%
PV status byte decimal value ≥ 64
Fail safe values (cf. Table 8-1)
Process value = 0 - 100%
PV status byte decimal value ≥ 64
GasSecure GS01
Safety Manual
C 8
HAPTER