SmartAlarm Instruction Manual Rev 2
Page 83 of 115
SECTION 18
– ALARM SEQUENCES
Within the 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.
To define a sequence the user can simply select any of the listed ISA
sequences.
Pushbuttons
Four integral pushbuttons and five remote pushbutton inputs are provided on
the annunciator unit to allow the user to be able to control any of the available
sequences which can be set on a per channel basis.
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.
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.
Acknowledge
– is used to silence the alarm and change the state of the
associated alarm window in accordance with the selected ISA sequence.
Reset
– is used to return the alarm to the normal off state once the Input has
returned to the normal condition.
As an option functional test can be replaced by Lamp Test and Reset can be
replaced by First Reset if required.
Audible Alarms
Each channel within the annunciator can be set to operate either of the two
integral audible alarms or they can be assigned to common relays configured
as horn relays as required.