TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook DG-TT7-K, Operating Manual

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MULTIXPLO AND MULTITOX DETECTORS
OPERATING MANUAL
44 NOSP17665
Revision 02a
6.10 Ambiguity function in combustible gas detector smart
sensors
In compliance with applicable standards, the ambiguity function is activated when a detected gas
concentration rises above 120% LEL. The signal is locked at 21.7 mA to protect against any false
measurement due to oxygen deficiency.
This function also cuts the power of the cartridge to avoid damaging the sensitive element.
The measurement signal can only be unlocked by the operator using the TLU600
remote control unit. Before that, the non-presence of inflammable gas or vapour
in atmosphere must be control by the user.
Even switching the power off and back on again from the control room will not
unlock the signal.
The TLU displays the following screen:
To clear the ambiguity, follow the instruction below with the TLU600:
INFO / STAT / ALRM / ACK. (YES)
The device then goes in warming-up mode (refer to §6.3) for 90s. The detector is in inhibition
mode. The current output and the default relay (if factory setting) are consequently activated.
A warming-up timer starts to countdown from 90 sec.
Then, the inhibition is released.