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SECTION 6 – ALARM SEQUENCES
On systems supplied with P925TS-O Output Cards each channel can be programmed
to operate to a sequence defined within ISA-S18.1 Alarm Sequences. Full details of
how to set each channel to the required alarm sequence are provided in the 9000TS
Configuration Manual.
The following paragraphs detail the most common features.
Summary
Within the alarm annunciator market a common standard has been adopted by all key
manufacturers and end users with regards to operational sequences. These standards
are used worldwide to define the visual indication, audible alarm and the action the
operator must take to control the annunciator.
The Instrument Society of America provide full details of each alarm sequence within
ISA 18.1-1979 (R1992) and RTK are fully compliant with the stated sequences. The
most common sequences are detailed within this section of the manual.
Pushbuttons
Six pushbutton functions are provided within the 9000TS System to allow the user to
be able to control any of the available sequences.
1.
Lamp Test
– is used to test the LED assemblies by illuminating them in a
steady state for as long as the pushbutton is pressed
2.
Functional Test
– is used to simulate an input on all channels and therefore all
windows and horn circuits will operate in accordance with the selected ISA
sequence and additional pushbuttons will need to be pressed to step through
the alarm sequence to return the unit to its normal state
3.
Mute
– is used to silence the audible alarm whilst allowing the associated alarm
window to continue to operate in accordance with the selected ISA sequence
4.
Acknowledge
– is used to silence the alarm and change the state of the
associated alarm window in accordance with the selected ISA sequence
5.
Reset
– is used to return the alarm to the normal off state once the Input has
returned to the normal condition
6.
First Reset
– is used to reset the flash sequence on the first alarm to occur
within a defined group of alarms. Once first reset has been pressed the next
alarm to occur within the group will flash at the first up alarm rate.
