TAC-O
2
_
H
Pg. 7
TEXAS ANALYTICAL CONTROLS
4418 Bluebonnet Drive | Stafford, TX 77477 | (281) 240-4160 |
www.tac-controls.com
4 Controls and Their Operation
To clear alarms and pump and
flow fail, press ACKNOWLEDGED.
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Green: OK
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Yellow: Sensor Weak
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●
Red: Fail
Timer countdown
for alarms/4-20.
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●
Changes to
Red and Flashes
During Alarms
4.1 Screen Display
After the analyzer is powered up, it displays warm-up screens, then the TAC address and phone number,
then the main screen. On subsequent screens, press the READINGS button at any time to return to the
main screen.
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Sensor Weak = Sensor is approximately 75% used and should be
replaced soon.
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O
2
++++ Over Range = O
2
levels exceed 100 ppm.
The Main Screen Displays:
• O
2
readings (++++ signifies “over range”).
• Alarm 1 and 2 setpoints: When in alarm mode, these are red.
• Alarm delay.
• SENSOR STATUS buttons.
• Timer countdown to activation of alarms and 4-20.
• Flow conditions.
• ACKNOWLEDGED button
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Red: O
2
++++
Over Range