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3.2.2.15 Event Displays
The basic RUN summary display indicates gas concentration information for all active channels
and
looks like this with four channels active:
1 CL 1.23 2 O3 45.6
3 CL 738. 4 NH 0.12
If any alarm or status even occurs on any channel, the indication for that channel will display a
flashing message. The following sections show these messages, compressed into the whole display
for convenience and clarity. The occurrence of any of the alarms or status events cause an entry to
be made into the “Event Queue”. The event queue is a history log of events that will be discussed in
more detail later.
3.2.2.15.1 Alarm Displays
Level alarms are caused by the sensed gas concentration exceeding the programmed
alarm level threshold (refer to section 3.2.2.14.1). The format for the level alarm display
is as follows:
INS 2 ALM
"ALARM" Indication
Alarm Module: 1,2 or 3
Alarm Mode: INST, STEL, TWA or CUSTOM
Alarm indication on the display would cause the alarm information to alternate with
normal RUN data on the display. Any of the following alarm indicators may appear in a
quadrant of the display depending on how many sensor channels are active:
• INS1ALM
• INS2ALM
• INS3ALM
• STL1ALM
• STL2ALM
• STL3ALM
• TWA1ALM
• TWA2ALM
• TWA3ALM
• CUS1ALM
• CUS2ALM
• CUS3ALM
The basic concentration alarm displays are shown in the following sample display:
1 INS1ALM 2 STL3ALM
3 TWA2ALM 4 CUS1ALM
Where: CH1: INS1ALM - alarm module 1 INST - mode alarm
CH2: STL3ALM - alarm module 3 STEL - mode alarm
CH3: TWA2ALM - alarm module 2 TWA - mode alarm
CH4: CUS1ALM - alarm module 1 CUSTOM - mode alarm
3.2.2.15.2 Status Event Displays
Status events are additional event displays which alert the operator to the status and
results of tests and checks being performed by the system. They are also used to alert the
operator to any values entered during programming which may potentially cause problems
during system operation.
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