In case of very high flammable concentrations >100%LEL the device is able to lock all
outputs [LOC]. This function shall be used for -standalone applications according to ATEX
requirements.
Output States
State Failure Relay Alarm Relay
Normal
Startup
Startup state
[default: switched]
Calibration
Latched voltage overrange Switched
Loop not connected Switched
Underrange Switched
Error Switched
Safety critical error Switched
LOC [combustible] Switched
Latched LOC [combustible] Switched
Alarm threshold exceed Switched
Switched: the relay state has switched from the normal state. The normal state can be set to energised if
alarm/failure or de-energised if alarm/failure. Normally de-energised if alarm/failure meets the ATEX and SIL
requirements. In case of switched relays the device will go to the normal state when the related condition
[non-latched alarm and/or fail] has been removed.
LOC: The PrimaX Gas Monitor has been exposed to a high gas concentration [above the LEL], and the over-
range condition still exists.
Latched LOC: The PrimaX Gas Monitor has been exposed to a high gas concentration [above the LEL], and
there is a possibility that the over-range condition may still exist.
For additional information about output states, see chapter 10 Appendix
31 PrimaX GB
4 Operation
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