5
Alarms, Warnings, and Notifications
Overview
Alarms
Warnings and Failures
Overview
This chapter provides in-depth information about alarms, warnings, and notifications; portions of this text
appear in abbreviated form elsewhere within this manual.
Alarms notify the instrument operator of danger.
Warnings notify of a condition that needs attention.
Indicators notify of a status (e.g., confidence indicator).
Take seriously all alarms, warnings, and indicators, and respond to each according to company policy.
Alarms
The Tango
®
TX1 instruments have alarms of two different intensities, high and low. Alarms are persistent:
they turn off when the alarm-causing event is no longer detected; however, if the instrument’s alarm latch is
enabled, an alarm will remain on until the user presses to turn it off.
When all alarm signals are on:
• The high alarm features the red lights, with steady sound. It is fast-paced.
• The low alarm is similar to the high alarm, but includes blue, as well as red light. It is medium-paced.
Note: Signals (visual, audible, and vibration) vary based on instrument settings.
Once the detected gas concentration changes, the alarm indicators will change to reflect any new condition
such as low-alarm gas, high-alarm gas, over-range gas, or no gas alarm. Different events can produce the
same alarm. Events are distinguished from one another through the use of symbols that appear on the
instrument display screen (see Table 5.1).
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