28
Model TA502A
Figure 30: A1 Alarm Set Point Option
For the acoustic gas leak detectors Observer and Surveyor there is one additional
option. That is the
A1
alarm relay delay. The display will indicate the
A1
relay delay
by the letters
dL
followed by the current delay time in seconds. The factory default
value is 0 seconds. Pressing the Mode/Select switch will increase the delay time by
10 seconds.
A1
alarm relay delay cannot be longer than that of
A2
.
4.4.7 Fault / Inhibit Option
After the
A1
alarm options have been selected, the user will select the Fault/Inhibit
option. The FAULT LED on the front panel will be flashing while the display indicates
Ac
or
nA
(Figure 31). An
Ac
selection specifies that the Model TA502A will activate
the Fault circuit while the unit is in the Inhibit Mode. A
nA
selection specifies that the
Model TA502A will not activate its Fault circuit when the unit is placed in the Inhibit
Mode (see Section 4.3). A
nA
selection will not disable the Fault circuit; therefore, if a
Fault occurs during the Inhibit Mode, the unit will activate the Fault circuit.
Not Active
is the factory default for this selection.
Figure 31: Fault / Inhibit Option
